APCU TEST REQ\'TS

> Rev: Draft
>
> Date: 12/18/96
>
> Written by: Tom Sobey/PG-1/KSC
>
> Coordinated: Tim Banhidy/PG-1

Table of Contents

**I. CITE TESTS**

A. CONFIGURATION ÒAÓ SECONDARY LOW POWER - ISOLATED

B. CONFIGURATION ÒBÓ PRIMARY POWER

C. CONFIGURATION ÒCÓ SECONDARY HIGH POWER

D. CONFIGURATION ÒDÓ SECONDARY HIGH POWER

E. CONFIGURATION ÒEÓ SECONDARY HIGH POWER

II\. OPF TESTS FOR INITIAL UNIT(S)

A. CONFIGURATION FOR FLIGHT 3A/5A - SECONDARY LOW POWER

B. CONFIGURATION FOR FLIGHT 4A - PRIMARY POWER

C. CONFIGURATION FOR FLIGHT 6A/UF1 - SECONDARY HIGH POWER

D. CONFIGURATION FOR FLIGHT UF2 - SECONDARY HIGH POWER

E. CONFIGURATION FOR FLIGHTS ABOVE UF2 - SECONDARY HIGH POWER

III\. OPF TESTS FOR APCU REMAINING IN ORBITER (aka \"Turnaround\")

A. Early Missions (First or First Few turnarounds) whether configuration
has changed or not.

B. Later Missions (This APCU has a good history of flights with no
anomalies) but the configuration HAS changed.

C. Later Missions (This APCU has a good history of flights with no
anomalies) and the configuration HAS NOT changed.

D. Any mission in which an anomaly has occurred.

IV\. PAD TESTS

A. APCU/MPLM IVT - SECONDARY HIGH POWER CONFIGURATION

**BACKGROUND**

Since the Flight compliment of an APCU consists of two boxes, for the
rest of this paper any reference to APCUs will be assumed to mean a
flight compliment of an APCU pair, unless indicated otherwise.

It is also assumed that as of this date, the philosophy to test & fly
the APCU dictates that once installed into the Orbiter, it will remain
there, unless a contingency dictates its removal. Therefore the 3
Orbiters, which will fly ISS missions involving APCUs, will have
dedicated APCUs assigned to them, and will not, as a rule, be swapped.

At this time, the testing philosophy indicates that when an APCU arrives
at KSC, that it will be tested through the Cargo Integration Test
Equipment (CITE) in all of its possible configurations before being
installed into the Orbiter. Once an APCU is installed in an Orbiter for
the first time, an Orbiter Interface Verification Test (IVT) will be
performed to verify interface integrity. Reflights of these APCUs that
are not removed from the orbiter will necessitate a \"health check\"
type of test before reflying. This test is referred herein as a
\"turnaround\" test.

In addition to these tests, for missions 6A and above, an IVT will be
performed on the launch pad to verify the Interfaces to the Mini
Pressurized Logistics Module (MPLM) once it is installed in the orbiter
as required. This test will be repeated for each flight of a MPLM.

It is the purpose of this paper to identify the tests that will be
performed on, or using, the APCU in the CITE stand, in the OPF, and on
the Pad.

**PHILOSOPHY**

The general test philosophy will be to imitate what the nominal
operating sequence will be in each of the configurations used on orbit.
The following sequence will be assumed, as the latest operating sequence
decided by the APCU Sub-team as of the middle of 1996.

Assuming all connections are properly made per the flight configuration,
the APCU is controlled by the use of two switches (per unit). One is the
Converter switch, which controls whether the power converter is either
ON or OFF. The other switch is the Output Deadfacing Relay switch, which
controls whether the output relay is either OPEN or CLOSED.

For testing purposes, we intend to test the interfaces of the APCU(s) at
each step. That is to perform a step, test or measure the inputs and
outputs for the expected levels, then move to the next step.

The nominal procedure to activate each APCU is as follows:

With both the Converter and Output switches off, power is applied to the
APCU.

The Converter switch is turned ON. (verify no output)

The Converter switch is turned OFF. (remove power to prevent arching)

The Output switch is turned ON. (enable output)

The Converter switch is turned ON. (apply power)

When the tests are over, the converter is turned off, then the output
relay is turned off to open the deadfacing contacts.

# CITE TESTS

(Functional Interface (I/F) tests after APCU has been connected,
configured correctly, and systems are ready.)

## CONFIGURATION "A" SECONDARY LOW POWER - ISOLATED

> Connect APCU power inputs per ICD.
>
> Use of oscilloscope recommended when required to observe signal
> characteristics on inputs.
>
> Connect PLRPC load to APCU outputs through appropriate GSE cables.
>
> For grounding scheme: Load bank chasis will be connected to the APCU
> chasis for grounding.
>
> J4 will not be used to tie return wire to chasis for these tests. Just
> the "cap" will be installed.
>
> J5 connector on each APCU will be capped.
>
> J1 output of each APCU connected to ODS (or simulator).
>
> No Interconnect Harness for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### At CITE power source, verify APCUs do not exceed input voltage and current parameters (uses J201connectors)

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate each APCU power output to ON

#### Command settings on SSP for each APCU.

> \"Ouput Power ON/OFF\" S6, S11 to ON (Up).

### With the Load(s) set for No Load (High Z), Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY.
>
> \"Ouput Power Status\" indicator DS6, DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station CBMs through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for each APCU. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.06 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for each APCU. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 2.85 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 1800 Watts for each APCU. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION "B" PRIMARY POWER

> Connect APCU power inputs per ICD.
>
> Use of oscilloscope recommended to observe signal characteristics on
> inputs.
>
> Connect PLRPC load to APCU outputs through appropriate GSE cables.
>
> For grounding scheme: Load bank chasis will be connected to the APCU
> chasis for grounding.
>
> J4 will not be used to tie return wire to chasis for these tests. Just
> the "cap" will be installed.
>
> J5 connected with P5H connector (High voltage configuration) on each
> APCU.
>
> J1 output of each APCU connected to ODS (or simulator).
>
> No Interconnect Harness for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### At CITE power source, verify APCUs do not exceed input voltage and current parameters (uses J201connectors)

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 140.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 140.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate each APCU power output to ON

#### Command settings on SSP for each APCU.

> \"Ouput Power ON/OFF\" S6, S11 to ON (Up).

### With the Load(s) set for No Load (High Z), Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY.
>
> \"Ouput Power Status\" indicator DS6, DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 140 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 140 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station PVM through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 136 to 144 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for each APCU. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.05 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for each APCU. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 2.6 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 2000 Watts for each APCU. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.1 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION "C" SECONDARY HIGH POWER

> Connect APCU power inputs per ICD.
>
> Use of oscilloscope recommended to observe signal characteristics on
> inputs.
>
> Connect PLRPC load to APCU #1 output through an appropriate GSE cable.
> The APCU #2 output will only be connected to a DVM.
>
> For grounding scheme: Load bank chasis will be connected to the APCU
> chasis for grounding.
>
> J4 will not be used to tie return wire to chasis for these tests. Just
> the "cap" will be installed.
>
> J5 connector on each APCU will be capped.
>
> The Interconnect Harness connecting the J6's of each APCU together
> will be used for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### At CITE power source, verify APCUs do not exceed input voltage and current parameters (uses J201connectors)

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #1 (forward) power output to ON

#### Command settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#1 power output active (proper interfaces at J201, J2, J3 should see power at J1 to feed a load bank representing the MPLM on Node1.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#1 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#2 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for APCU#1. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.03 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for APCU#1. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 1.44 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 3600 Watts for APCU#1. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION "D" SECONDARY HIGH POWER

> Connect APCU power inputs per ICD.
>
> Use of oscilloscope recommended to observe signal characteristics on
> inputs.
>
> Connect PLRPC load to APCU #1 output through an appropriate GSE cable
> for MPLM ODS path.
>
> Connect PLRPC load to APCU #2 output through an appropriate GSE cable
> for the MPLM ROEU path.
>
> Note that only one load will be active at a time, (while the other
> will remain deactivated) during appropriate APCU output tests.
>
> For grounding scheme: Load bank chasis will be connected to the APCU
> chasis for grounding.
>
> J4 will not be used to tie return wire to chasis for these tests. Just
> the "cap" will be installed.
>
> J5 connector on each APCU will be capped.
>
> The Interconnect Harness connecting the J6's of each APCU together
> will be used for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### At CITE power source, verify APCUs do not exceed input voltage and current parameters (uses J201connectors)

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #1 (forward) power output to ON

#### Command settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#1 power output active (proper interfaces at J201, J2, J3 should see power at J1 to feed a load bank representing the MPLM on Node1.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#1 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#2 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for APCU#1. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.03 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for APCU#1. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 1.44 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 3600 Watts for APCU#1. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Deactivate each APCU internal converters

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Deactivate APCU #1 (forward) power output to OFF

#### Verify proper settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to OFF (Down).

### Activate only APCU #2 (forward) power output to ON

#### Command settings on SSP for APCU #2.

> \"Ouput Power ON/OFF\" S11 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 BARBERPOLE

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#2 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing the MPLM through the ROEU.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#2 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#1 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.03 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 1.44 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 3600 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION "E" SECONDARY HIGH POWER

> Connect APCU power inputs per ICD.
>
> Use of oscilloscope recommended to observe signal characteristics on
> inputs.
>
> Connect PLRPC load to APCU #2 output through an appropriate GSE cable.
> The APCU #1 output will only be connected to a DVM.
>
> For grounding scheme: Load bank chasis will be connected to the APCU
> chasis for grounding.
>
> J4 will not be used to tie return wire to chasis for these tests. Just
> the "cap" will be installed.
>
> J5 connector on each APCU will be capped.
>
> The Interconnect Harness connecting the J6's of each APCU together
> will be used for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### At CITE power source, verify APCUs do not exceed input voltage and current parameters (uses J201connectors)

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #2 (forward) power output to ON

#### Command settings on SSP for APCU #2.

> \"Ouput Power ON/OFF\" S11 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#2 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing the MPLM through the ROEU.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#2 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#1 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Change the load(s) to dissapate 15 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with current readings showing 0.03 +/- .24 amps per inverter on each APCU.

#### Change the load(s) to perform a step load function, and step the load (at no greater than 200 a/ms) from 15W to 715W for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 1.44 +/- .24 amps per inverter on each APCU.

#### Gradually increase the load to 3600 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

# OPF TESTS FOR INITIAL UNIT(S)

> Effectively the same tests we ran in the CITE stand, but now using the
> real orbiter rather than the simulation that CITE provides.
>
> (Functional Interface (I/F) tests after APCU has been connected,
> configured correctly, and systems are ready.)

## CONFIGURATION FOR FLIGHT 3A/5A - SECONDARY LOW POWER

> Verify connectors J4, J5, J6 capped.
>
> Verify J1 of APCU#1 connected to the Orboter Docking System (ODS).
>
> Verify the ODS Adapter Box (GSE), connected to the Station side of the
> ODS, connects to a DC Load.
>
> No Interconnect Harness for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate each APCU power output to ON

#### Command settings on SSP for each APCU.

> \"Ouput Power ON/OFF\" S6, S11 to ON (Up).

### With the Load(s) set for No Load (High Z), Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY.
>
> \"Ouput Power Status\" indicator DS6, DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station CBMs through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 1.8KW.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 7.25 +/- 0.24 Amps.
>
> "Converter B Output Current" for 7.25 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station CBMs through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

### Orderly Power Down (TBD)

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 (TBD) VDC, and
> less than 1.0 Vrms (TBD) VAC.

## CONFIGURATION FOR FLIGHT 4A - PRIMARY POWER

> Verify connectors J4, J6 configured correctly.
>
> Verify J5 connected with P5H connector (High voltage configuration) on
> each APCU.
>
> Verify J1 of APCU#1 connected to the Orboter Docking System (ODS).
>
> Verify the ODS Adapter Box (GSE), connected to the Station side of the
> ODS, connects to a DC Load.
>
> No Interconnect Harness for this test.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 140.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 140.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate each APCU power output to ON

#### Command settings on SSP for each APCU.

> \"Ouput Power ON/OFF\" S6, S11 to ON (Up).

### With the Load(s) set for No Load (High Z), Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY.
>
> \"Ouput Power Status\" indicator DS6, DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 140 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 140 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station PVM through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 136 to 144 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 2000 Watts for each APCU.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 140 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 140 +/- 5.6 Volts.
>
> "Converter A Output Current" for 7.1 +/- 0.24 Amps.
>
> "Converter B Output Current" for 7.1 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output active (proper interfaces at J201, J2, J3 should see power at each J1 to feed station PVM through the orbiter ODS to a load bank.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at J1, for voltage range of 136 to 144 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION FOR FLIGHT 6A/UF1 - SECONDARY HIGH POWER

> Verify connectors J4, J5 capped.
>
> Uses Interconnect Harness between APCUÕs J6 connectors for this test.
>
> Verify J1 of APCU#1 connected to the Orboter Docking System (ODS).
>
> Verify the ODS Adapter Box (GSE), connected to the Station side of the
> ODS, connects to a DC Load.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #1 (forward) power output to ON

#### Command settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#1 power output active (proper interfaces at J201, J2, J3 should see power at J1 to feed a load bank representing the MPLM on Node 1.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#1 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#2 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 3600 Watts for APCU#1.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 7.25 +/- 0.24 Amps.
>
> "Converter B Output Current" for 7.25 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#1 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing the MPLM on Node 1.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#1 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#2 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at J1, for less than 1.0 VDC, and less than 1.0
> Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION FOR FLIGHT UF2 - SECONDARY HIGH POWER

> Verify connectors J4, J5 capped.
>
> Uses Interconnect Harness to connect the APCUÕs J6 together for this
> test.
>
> Verify J1 of APCU#1 connected to the Orboter Docking System (ODS).
>
> Verify the ODS Adapter Box (GSE), connected to the Station side of the
> ODS, connects to a DC Load.
>
> Verify J1 of APCU#2 connected to the ROEU.
>
> Verify the PDS (GSE) connects the ROEU to a DC Load.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at each J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #1 (forward) power output to ON

#### Command settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#1 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing the MPLM on Node 1.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#1 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#2 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 3600 Watts for APCU#1. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Deactivate each APCU internal converters

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Deactivate APCU #1 (forward) power output to OFF

#### Verify proper settings on SSP for APCU #1.

> \"Ouput Power ON/OFF\" S6 to OFF (Down).

### Activate only APCU #2 (forward) power output to ON

#### Command settings on SSP for APCU #2.

> \"Ouput Power ON/OFF\" S11 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 BARBERPOLE

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 GRAY.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#2 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing a MPLM through the ROEU.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#2 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#1 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 3600 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at each J1, for less than 1.0 VDC, and less than
> 1.0 Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

## CONFIGURATION FOR FLIGHTS ABOVE UF2 - SECONDARY HIGH POWER

> Verify connectors J4, J5 capped.
>
> Uses Interconnect Harness to connect APCUÕs J6 together for this test.
>
> Verify J1 of APCU#2 connected to the ROEU.
>
> Verify the PDS (GSE) connects the ROEU to a DC Load.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #2 (forward) power output to ON

#### Command settings on SSP for APCU #2.

> \"Ouput Power ON/OFF\" S11 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#2 power output active (proper interfaces at J201, J2, J3 should see power at J1 to a load bank representing the MPLM through the ROEU.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#2 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#1 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 3600 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at J1, for less than 1.0 VDC, and less than 1.0
> Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT). 

# OPF TESTS FOR APCU REMAINING IN ORBITER (aka \"Turnaround\")

## Early Missions (First or First Few turnarounds) whether configuration has changed or not.

### Test the APCUs in the Orbiter, but using the full sequence of load testing as specified in the CITE tests of section I.

## Later Missions (This APCU has a good history of flights with no anomalies) but the configuration HAS changed.

### Test the APCUs in the Orbiter, but using the full sequence of load testing as specified in the CITE tests of section I.

## Later Missions (This APCU has a good history of flights with no anomalies) and the configuration HAS NOT changed.

### Test the APCUs in the Orbiter, but using the sequence of testing as specified in the OPF tests of section II.

## Any mission in which an anomaly has occurred.

### Remove the APCU from the orbiter, return it to CITE, and perform the appropriate testing from section I.

# PAD TESTS

> (Effectively a repeat of the APCU/Orbiter ROEU/MPLM I/F test, using
> the MPLM as the end item instead of a load bank.)

## APCU/MPLM IVT - SECONDARY HIGH POWER CONFIGURATION

> Verify APCU power inputs connected per ICD.
>
> Verify connectors J4, J5 capped.
>
> Uses Interconnect Harness to connect APCUÕs J6 together for this test.
>
> Verify J1 of APCU#2 connected to the ROEU.
>
> Verify the ROEU is mated to the MPLM.

### Activate Orbiter Power bus, 

####  Verify proper settings on SSP for each APCU.

> 1\) \"Converter ON/OFF\" (S4 & S8) OFF (Down)
>
> 2\) \"Ouput Power ON/OFF\" (S6 & S11) OFF (Down)

#### Activate P/L Power Bus.

1\) Cabin Power - SSP CB1 & CB2 ON (In).

2\) Aux power ON.

3\) P/L Main C ON.

#### Verify status indicators for each APCU are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicators - DS4 & DS8 - BARBERPOLE
>
> \"Ouput Power Status\" indicator - DS6 & DS11 - BARBERPOLE

#### Verify data outputs for each APCU are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 110.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 0.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Converter B Temp Sensor" for \<176 +/- 1.4 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU's power outputs not active (proper interfaces at J201, J2, J3 should see no power at either J1)

> Measure Voltage level at J1's, for less than 1.0 - VDC.

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" 

> \"Conversion Status\" indicator DS4, DS8 GRAY
>
> \"Ouput Power Status\" indicator DS6, DS11 BARBERPOLE

#### Verify each APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124.0 +/- 3.0 volts
>
> "Voltage Out 0 to 180" for 124.0 +/- 5.6 volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 amps
>
> "Converter B Output Current" for 0.0 +/- 0.24 amps
>
> "Converter A Temp Sensor" for \<176 degrees F.
>
> "Converter B Temp Sensor" for \<176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify each APCU power output not active (proper interfaces at J201, J2, J3 should see no power at J1)

> Measure Voltage level at J1, for less than 1.0 VDC.

### Deactivate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4, S8 to OFF (Down).

### Activate only APCU #2 (forward) power output to ON

#### Command settings on SSP for APCU #2.

> \"Ouput Power ON/OFF\" S11 to ON (Up).

### Activate each APCU internal converter

#### Command settings on SSP for each APCU.

> \"Converter ON/OFF\" S4 & S8 to ON (Up).

#### Verify each APCU does not exceed input voltage and current parameters (uses J201connector)

> Observe P/L power busses via shuttle monitoring that we haven\'t
> exceeded limits.

#### Verify each APCU status indicators are nominal (verifies J3 to Shutle SSP)

##### Observe SSP \"talkback indicators\" for APCU #2:

> \"Conversion Status\" indicator DS4 GRAY
>
> \"Ouput Power Status\" indicator DS6 GRAY

##### Observe SSP \"talkback indicators\" for APCU #1:

> \"Conversion Status\" indicator DS8 GRAY
>
> \"Ouput Power Status\" indicator DS11 BARBERPOLE.

#### Verify APCU data outputs are within limits (verifies J2 Shuttle P/L MDM I/F)

> Query P/L MDM for the following 7 analogs:
>
> "Voltage Out 110 to 160" for 124 +/- 3.0 Volts.
>
> "Voltage Out 0 to 180" for 124 +/- 5.6 Volts.
>
> "Converter A Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter B Output Current" for 0.0 +/- 0.24 Amps.
>
> "Converter A Temp Sensor" for \< 176 degrees F.
>
> "Converter B Temp Sensor" for \< 176 degrees F.
>
> "Trip Indicator" for No Trip indications (-4.84 +/- 0.2 vdc.)

#### Verify APCU#2 power output active (proper interfaces at J201, J2, J3 should see power at J1 to the MPLM.)

##### Verify Input voltage and input current are within limits.

##### Verify output current is within limits.

##### Measure Voltage level at APCU#2 J1, for voltage range of 122 to 126 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

##### Measure Voltage level at APCU#1 J1, for voltage of less than 1.0 VDC, and less than 1.0 Vrms VAC. (APCU @ 0.5vrms plus rms of load bank.)

#### Gradually increase the load to 3600 Watts for APCU#2. Verify the readings of 5 d) & 5 e) above, but with the final current readings showing 7.25 +/- .24 amps per inverter on each APCU.

### Orderly Power Down.

#### Deactivate each APCU internal converter

#### Switch each APCU power output to OFF

> Measure Voltage level at J1, for less than 1.0 VDC, and less than 1.0
> Vrms VAC.

#### Deactivate Payload Power.

##### P/L Main C to Off.

##### Aux Power to Off.

##### Cabin Power to Off (CB1 & CB2 OUT).