Page 2 · 7144 Series Laser MultiSource User’s Manual

Table of Contents
Introduction ............................................................................................... 3
Safety Terms and Symbols ....................................................................... 4
Quick Start ................................................................................................ 6
Installation ................................................................................................. 7
Operation .................................................................................................. 8
Settings and Menus ................................................................................ 10
System Menu .......................................................................................... 11
Laser Channel Menu ............................................................................... 13
Remote Mode Operation......................................................................... 15
Using the USB Interface .......................................................................... 15
Using the Network Interface .................................................................... 16
Power and Cable Connections ............................................................... 17
Choosing a Cable ................................................................................... 19
Wiring and Grounding Considerations ................................................... 20
Using the Auxiliary Interface.................................................................... 21
Using the System Interlock ..................................................................... 21
Using the Laser Interlock/LED Interface ................................................. 22
Using the Laser Driver ............................................................................. 23
Laser Control Modes ............................................................................... 23
Using the Laser Limits ............................................................................. 24
Analog Modulation (Optional Feature) ................................................... 25
Compensating for Voltage Loss.............................................................. 26
User Calibration ...................................................................................... 29
Specifications .......................................................................................... 30
Error Messages ....................................................................................... 32
Maintenance and Service........................................................................ 34
EC Declaration of Conformity ................................................................. 36
UK Declaration of Conformity ................................................................. 37

7144 Series Laser MultiSource User’s Manual · Page 3

Introduction
Thank you for choosing the 7144 Laser MultiSource multi-channel laser driverfrom Arroyo Instruments. With a 2x20 character VFD display, both Ethernet andUSB computer interfaces, and built-in rack mounting, the MultiSource works
equally well in small- and large-scale deployments.
The user interface of the MultiSource provides status for each channel in thesystem, along with on/off control. The unit can be operated locally but is more
intended for remote control via its computer interfaces.
The MultiSource offers all the features you would expect from a modern
precision controller, including:••••Comprehensive laser protection circuitry, including hardware voltage
and current limits, and fast transient shutdown.
Power mode control, both in photodiode current (AMC) or computed
photodiode power (APC) modes.
Simultaneous reading of current set point, voltage measurement, andphotodiode current or power measurement.
External analog modulation

What’s in the Box
Along with the MultiSource itself, a CD with electronic copies of this manual, theComputer Interfacing Manual, and USB drivers are included. For USA
customers, a power cord is included. For non-USA customers, an IEC-60320C13 rated AC power cord must be provided.
Accessories
Arroyo Instruments also sells several accessories designed to work with theMultiSource. These include:••

1220B LaserSource Cable, 4A, 2m
This cable has DB-9 male/female connectors for interfacing to theLaserMount or other connectorized fixtures and shielded twisted pairconductors for improved modulation performance. A pigtailed versionof this cable, with tinned ends for soldering into custom solutions, isavailable as p/n 1221B.
1201 USB Cable, 3m

Page 4 · 7144 Series Laser MultiSource User’s Manual

Safety Terms and Symbols
The following safety-related terms are used in this manual:•••Warnings (noted by the WARNING heading) explain dangers that
could result in physical injury or death;
Cautions (noted by the CAUTION heading) explain conditions that
could result in damage to the instrument, other equipment, or yourdevice.
Notes (noted by the NOTES heading) are not safety-related, and areintended simply to point out important information.

If, at any time, any of the following conditions exist, or are suspected of existing,discontinue use of the unit until it can be inspected by qualified service
personnel:•••

Visible damage to the unit, including damage or stress caused during
product shipment;
Storage of the unit outside the standard storage temperature or
humidity rating, or prolonged storage under harsh conditions;
Failure to operate properly.

If needed, contact your distributor or Arroyo Instruments for service or repair toensure the safety of the product is maintained.
Symbols
Power OffPower On

Caution, refer to manual

Earth ground

Caution, risk of electric shock7144 Series Laser MultiSource User’s Manual · Page 5

General Warnings

WARNING
Potentially lethal voltages exist within this instrument.
This instrument is intended for use by qualified
personnel who understand the shock hazards and arefamiliar with safety procedures required to avoid injury.
Read this manual completely before attempting to use
this product.

WARNINGTo avoid electrical shock, ensure a 3-prong power cord
is used, and is plugged into an earth-grounded
receptacle. Failure to do so can result in severe injury or
death.

CAUTION

There are no user-serviceable parts inside. All service
and repair work shall be done by Arroyo Instruments or
personnel authorized by Arroyo Instruments.
Modifications done by non-authorized personnel willvoid the warranty. Please see the Service section later inthis manual for instructions on how to obtain service forthis instrument.

Page 6 · 7144 Series Laser MultiSource User’s Manual

Quick Start
After unpacking the unit, and all packing material has been removed, place thecontroller into a rack or onto bench top. Plug the AC cord into the unit and into
the wall outlet. Turn on the power switch located on the front panel, and the unit
will power up, displaying the model information, serial number, and firmware
version number.
The most important consideration is to ensure the Laser limits are set correctly,
particularly the laser current limit. It is also good to set the voltage limits toenhance the protection of the device.
You can use the menu from each sub-channel to configure each channel’s
limits, or use ArroyoControl or your own program to make changes settings via
the computer interface.
To use ArroyoControl over the Ethernet interface, you must first install the COM
Port Redirector software, as ArroyoControl cannot make direct network
connections. More information is available in the Using the COM Port Redirector
section below.
Next, connect the cables between your laser mount or other fixture and theLaser OUTPUT connectors of the MultiSource. We recommend using ourcables as they have been designed to work well with the MultiSource. If using
your own cables, ensure they have been properly wired according to the pin-outof the MultiSource and your fixture.
Finally, change the set points to an appropriate setting and turn the outputs onby pressing and holding the On/Off within the channel display on theMultiSource.

7144 Series Laser MultiSource User’s Manual · Page 7

Installation
Installation of the MultiSource is very straightforward, some of which wasdetailed in the section above. This section will provide additional details andconsiderations for installing your MultiSource.
After unpacking the unit, make sure all packing materials have been removed
and nothing obscures the ventilation ports on the front, back, and sides of theunit.

CAUTION
Do not exceed 250VAC on the line input.
It is critical to maintain the proper voltage input into theunit. If the actual voltage exceeds 250VAC, damage tothe unit may occur.
Powering Up the Unit
Connect the AC power cord to the unit. You must properly ground the unit byplugging the supplied power cord into a three-prong grounded outlet, or using athree-to-two prong adapter and connecting the ground tab to earth ground.
Turn the power switch, located on the front panel, into the on (|) position. The
unit will display the model, serial number, and firmware version, go through aquick power-up self-test, and return to the last known operating state.
Ventilation
The MultiSource has vent holes on the sides, and front and back of the unit.
You must not block these vent holes, or overheating may occur, causing
damage to the unit.

CAUTION
Do not operate the unit above +40°C ambient, andensure the instrument is properly ventilated, or the unit
may overheat and possible damage to the unit may
occur.

Page 8 · 7144 Series Laser MultiSource User’s Manual

Rack Mounting
The MultiSource features integrated rack mount ears, and is design to workwith standard 19” rack systems. Because the unit partially draws air from theside, and therefore inside the rack housing, be sure that the internal rack
ambient temperature (which will typically be several degrees higher than room
ambient) does not exceed the unit’s operating temperature.
Warm-up and Environmental Considerations
In order to achieve the highest level of accuracy, the MultiSource should bepowered on for at least one hour prior to taking measurements. In addition,
ensure that the unit is not operating outside the operational temperature range
or humidity conditions.

Operation
The Front Panel
The front panel operation of the MultiSource is very simple. Due to the complex
nature of the instrument, most operations are intended to be done remotelyusing either ArroyoControl, or a software program you develop. However, fullmonitoring and control is available front the front panel.

7144 MultiSource Main Screen
There are only two buttons on the front panel: Up [Menu], and Down [On/Off].
When quickly pressed and released (a short press), the buttons function as up
and down buttons, scrolling between each of the individual channel status
screens and the main summary screen.
If a button is pressed and held for over a second (a long press), the secondary
action occurs, and its action depends on what screen the user is it:
Master Status Window (all four channels displayed):•

On/Off: Turns all channels off. Individual channels can only be turnedback on in the individual Channel Status Windows.

7144 Series Laser MultiSource User’s Manual · Page 9•

Menu: enters the system menu.

Channel Status Window:••

On/Off: Turns an individual channel on or off
Menu: enters the individual channel menu.

If in remote mode, the first long press of the Menu button exits remote mode. A
second long press is needed to enter the menu.
There are four LEDs: green, yellow, red, and blue:••••

Green LED: lit when AC power is applied
Yellow LED: lit once remote communication has been established
Red LED: lit once an error has occurred, with error message on display
Blue LED: lit when in the Master Status Window, indicates one or morechannels is on; when in an individual Channel Status Window, indicates
if that specific channel is on.

Display Windows
The display will typically show the Master Status Window, which is a summary of
all channels on the system. It can also display the Channel Status Window, which
is a more detailed status of a single channel.
Example displays are shown below:

Ch 1|Ch 2|Ch 3|Ch 4.On.| Off|.On.|.On.
Master Status Window

Ch IoSET=
0
HiBW
1 Vf= 0.000 Im
0
Channel Status Window
Measurements
One of the advantages of the MultiSource is its ability to display both the set
point and two measurements simultaneously. The table below shows which
values will appear on the display depending on the mode selected:

Page 10 · 7144 Series Laser MultiSource User’s Manual

Mode
Io
Im
Po
Vf

Setpoint
Current (mA)
PD current (μA)
PD power (mW)
Voltage (V)Displayed Measurements
PD current or power and voltage
Current and voltage
Current and voltage
Current and PD current or power

The instrument will show photodiode current or photodiode power, dependingon the value of PD Resp. Photodiode current is shown whenever PD Resp iszero, while photodiode power will be shown whenever PD Resp is non-zero.
See the Control Modes section below for more information on the various
modes.
Status Messages
The instrument will display status messages in the upper-right corner of thedisplay indicating several different conditions that may be of interest to the user.
If multiple conditions exist simultaneously, then the instrument will cycle througheach condition, displaying each status message for approximately one second.
Possible condition messages are:
Lock
LoBW
HiBW
ILim
MLim
PLim
Script

The interlock is open and the unit cannot be turned on.
The unit is in low bandwidth mode.
The unit is in high bandwidth mode.
The unit is in current limit.
The unit is in photodiode current limit.
The unit is in photodiode power limit.
The unit is executing a script or *WAI command.

Settings and Menus
Most parameters of the MultiSource can be viewed and changed within themenu, but some settings can only be adjusted remotely. There are two distinct
menus: the system menu, which is only reachable when viewing the Master
Status Window, and the individual channel menus, which are available from the
Channel Status Window of each channel.
The system menu includes system-level settings such as Ethernet configuration,
display, and other non-Laser-related settings.
The channel menu includes all of the channel specific settings, such as set
points, limits, and other Laser-specific settings.
Once you have entered a menu, there are four distinct actions:

7144 Series Laser MultiSource User’s Manual · Page 11

•
•
•
•

Up – short press (less than 1 second) of the Up [Menu] button
Down – short press (less than 1 second) of the Down [On/Off] button
Exit – long press (more than 1 second) of the Up [Menu] button
Edit – long press (more than 1 second) of the Down [On/Off] button

To scroll through the menu, use the Up and Down actions.
To edit an item, use the Edit action to make changes to the item. An asterisk will
be displayed in the right-most column indicating you are editing the setting. Use
the Up and Down actions to change to different values. Once setting has beenadjusted to the desired value, use the Edit action to save the setting.
To enter a sub-menu, select the sub-menu and use the Edit action. You will thenbe positioned at the top of the new sub-menu settings.
To exit the menu, use the Exit action. If you are in the middle of editing a setting,this will also save the then current value of the setting before exiting.
Below is a complete list of available settings:

System Menu
Factory
Default

Menu

Description

Set While Rmt

To disable changing the set point while in
Remote Mode, set this value to No. To enablechanging the set point while in Remote mode,
set this Value to Yes.

Yes

Err While Rmt

To turn off the display of errors while in remotemode, set this value to No. To display errors
while in remote mode, set this value to Yes.

Yes

Brightness

The vacuum florescent display can be set to oneof eight brightness levels.

100%

AutoDim
Display

Automatically dims the display to the lowest
setting, can be disabled by setting to No.

Yes

Audible Beep

This setting controls when the unit produces
audible feedback. Set to No to prevent sound, or
Yes to enable audible alerts such an error
messages.

Yes

AuxOutControls the state of the auxiliary digital output.

Off

Root Menu

Page 12 · 7144 Series Laser MultiSource User’s Manual

Menu

Factory
Default

Description
Network Menu

Edit Settings

Enable editing and viewing of the network
settings. Set to Yes to display settings below

No

IP ModeSet to Auto (assign dynamic IP address by
DHCP/BOOTP/AutoIP) or Static (assign static IP
address manually).

Auto

DHCP

Enable DHCP IP assignment.

Yes

BOOTP

Enable BOOTP IP assignment.

Yes

AutoIP

Enable Auto-IP assignment.

Yes

IP A/B/C/D

IP address.

Assigned via
DHCP

Subnet Mask

Subnet mask

Assigned via
DHCP

Gateway
A/B/C/D

Gateway IP address. Not required, can be left
0.0.0.0.

Assigned via
DHCP

Clr Web PW

Clears the Web Password used to authenticate
Web connections.

No

Clr Serial PW

Clears the Serial Password used to authenticate
Telnet/VCP connections.

No7144 Series Laser MultiSource User’s Manual · Page 13

Laser Channel Menu
Menu

Factory
Default

Description
Root Menu

Io setCurrent setpoint in Io (ACC) mode

0mA

Im setPhotodiode current setpoint in Im (AMC) mode

0uA

Po setPhotodiode power setpoint in Po (APC) mode

0mW

Vf setVoltage setpoint in Vf (AVC) mode

0.000VMode

As described in the Laser Control Modes section
below, the unit offers five control modes: Io (ACC),
Io HiBW (ACC), Im (AMC), Po (APC), and Vf(AVC). Change this setting to select a new mode.

Io (ACC)

Io ResResolution of the Io set point and measurement.
Available options are dependent on the range ofthe instrument.

Depends
on modelIo limit

This setting controls the maximum amount offorward current that can be delivered to the laser
diode. This limit is implemented in hardware for
immediate response. For more information about
limits, see Using Limits below.

Maximum

Im limit

This setting controls the maximum amount ofmonitor photodiode current the unit will allow. This
limit is implemented in software. For more
information about limits, see Using Limits below.

Maximum

Po limit

This setting controls the maximum amount ofmonitor photodiode power the unit will allow. This
limit is implemented in software. For more
information about limits, see Using Limits below.

Maximum

Vf limit

This setting controls the maximum amount offorward voltage that can be delivered to the laser
diode. This limit is implemented in hardware for
immediate response. For more information about
limits, see Using Limits below.

Maximum

Vf Sense

Selects the remote voltage sense lines for diodevoltage measurement. Pins 4 & 5 of the Monitor /Interlock connector must be wiring to the diode.
See Using Remote Voltage Sense below for moredetails.

Local

Page 14 · 7144 Series Laser MultiSource User’s Manual

Menu

Factory
Default

Description

Cable R

The cable resistance, in ohms. This setting can beused to compensate for voltage losses in the cabledue to cable and connector resistances. Cable R
is ignored in Vf (AVC) Mode. For more information
about this feature, see Using the Cable R Setting
below. Not available when using remote voltage
sense.

0.0000 Ω

PD RespThis factor is used by the unit to convert frommonitor photodiode current into optical power. The
value is in terms of microamps per milliwatt(μA/mW), such that power = photodiode current
divided by the factor.

0.00μA/mW

Tol Time

Tolerance time is the amount of time, in seconds,
that the measured value (current, voltage, etc.)
must be within the set point +/- the tolerance forthe unit to be considered in tolerance. In Io modes,
the tolerance is defined by Tol Io. For Im/Po
modes, the tolerance is fixed at 50uA. For Vfmode, the tolerance is fixed at 50mV.

5 seconds

Tol IoTolerance current is a band (in mA) around the set
point. When the actual current is within this bandfor longer than the Tol Time setting, then the unit isconsidered to be in tolerance.

10.0mAOn Delay

The delay, from the time the Output button ispressed to when the output is actually energized.

3000ms

Off if I Lim

Enables output shutdown on current limit. Adjusts
the OUTOFF register.

No

Off if Im Lim

Enables output shutdown on photodiode current
limit. Adjusts the OUTOFF register.

No

Off if Po Lim

Enables output shutdown on photodiode power
limit. Adjusts the OUTOFF register.

No

Off if Out ofTolerance

Enables output shutdown on out of tolerance.
Adjusts the OUTOFF register.

No

Ramp Time

Controls the ramp rate for turn on/turn off andchanges in set point.

80ms

Advanced Menu

7144 Series Laser MultiSource User’s Manual · Page 15

Remote Mode Operation“Remote mode” operation is when the MultiSource is being controlled by acomputer over the USB or Ethernet interfaces. When in remote mode, theMultiSource behaves differently, preventing you from affecting the operation of
the instrument, such as changing the set point. You cannot enter the menu
without taking the unit out of remote mode. While in remote mode, the Remote
LED will light.
Details on how to communicate with the MultiSource can be found in theComputer Interfacing Manual which is included on the CD that accompanied
this product.

Using the USB Interface
Using the MultiSource via USB is just as simple as using a serial port. In fact,
once you have installed the USB drivers, the instrument will appear as a virtual
serial port that behaves similarly to a standard RS-232C-type serial port.
To install the drivers, simply plug in the instrument to your computer. Most
Windows installations will automatically install the drivers needed tocommunicate with the instrument. In the event drivers are needed, insert the CD
you received with the MultiSource and follow the on-screen instructions.
Once the drivers are installed, to determine the COM port number, go to Control
Panel and select System. Once the System Properties dialog appears, choose
the Hardware tab then click on the Device Manager button. When the Device
Manager appears, click on the plus sign to the left of Ports. The port identified
as a USB Serial Port is the MultiSource. In the event you have multiple Arroyo
Instruments products plugged in simultaneously, you will need to experiment to
see which instrument was assigned to which port. For example, you could senda *IDN? query and see which instrument goes into remote mode.

Page 16 · 7144 Series Laser MultiSource User’s Manual

Using the Network Interface
The Ethernet interface on the MultiSource can be used in one of two ways: aTelnet connection to port 10001 or using the COM Port Redirector software tocreate a virtual COM port (VCP).
The Telnet connection requires no additional software, but the program making
the connection must be able to communicate over network connections.
A simpler approach is to use the COM Port Redirector (CPR) software, which will
create a virtual COM port much like the USB connection. No specialized
networking support is required, and the same program that can communicate
over the USB VCP can also be used with the network VCP.
To install the CPR software, either download from the Arroyo Instruments web
site, or you can find it on the CD you received with the MultiSource. Follow theon-screen prompts to install the software.
Once installed, start the software. You will also find instructions along with the
installation program on how to identify and install the virtual COM port. Follow
those instructions to add a new COM port and connect it to the IP address of theMultiSource.
In most cases the CPR software will detect the MultiSource when you click
Search for Devices, but if you need to manually determine the IP Address
information, you can do so by reviewing the IP settings in the Network menu of
the MultiSource. If you have multiple MultiSource controllers on your network,
the model number and serial number are included in the unit description to help
identify the specific unit.

7144 Series Laser MultiSource User’s Manual · Page 17

Power and Cable Connections
Laser Output Connector
Each Laser Channel connection is a female DB9, and has the following pin-out:
DB-9 Pin
Description
1
Interlock+2
Interlock –3
Earth Ground4
Laser Cathode Voltage Sense
5
Laser Cathode6
Photodiode (PD) Cathode7
Photodiode (PD) Anode8
Laser Anode Voltage Sense
9
Laser Anode
Shell
Earth Ground
LASER Output Connector (DB-9 Female)
Modulation Input Connector
For units equipped with the optional external analog modulation capability, there
are two modulation input connectors, one for channels 1 and 2, and a second
for channels 3 and 4. Each is a 4-pin Phoenix socket with the following pin-out:
Pin
Description
1
Channel 2 or 4 Modulation +2
Channel 2 or 4 Modulation –3
Channel 1 or 3 Modulation +4
Channel 1 or 3 Modulation –Modulation Connector (4-Pin Phoenix)

1

2

3

4

See Analog Modulation below for additional information.

Page 18 · 7144 Series Laser MultiSource User’s Manual

USB Connector
The USB connector is a standard Type B female connector, and can be plugged
into any USB 1.1 or USB 2.0 port. For more information on using the USB
interface, see the Computer Interfacing Manual which is included on the CDthat accompanied this product.
Ethernet Connector
The Ethernet connection is a standard RJ-45 connector, and compatible with
100Base-T networks.

For more information on using the Ethernet interfaces, see the Computer
Interfacing Manual which is included on the CD that accompanied this product.
Auxiliary Connector
The Auxiliary connector is a 4-pin Phoenix socket with the following pin-out:
Pin
Description
1
Aux +5V
2
Aux Input
3
Aux Output
4
Aux/Interlock Ground
Auxiliary Connector (4-Pin Phoenix)

1

2

3

4

7144 Series Laser MultiSource User’s Manual · Page 19

See Using the Auxiliary Interface below for additional information.
Interlock Connector
The Interlock connector is a 2-pin Phoenix socket with the following pin-out:
Pin
Description
1
Interlock2
Interlock Ground
Interlock Connector (2-Pin Phoenix)

1

2

See Using the Interlock below for additional information.

Choosing a Cable
A cable is required for the Laser outputs. Arroyo Instruments carries cables
specifically designed for these applications, both with a DB connector on thedevice end or with a bare wire pigtail for terminating the connection into acustom mount or device.
Current Rating
Up to 20 Amps
Up to 40 Amps

DB to DB p/n
1230
1232

DB to Pigtail p/n
1231
1233

NOTE
Connections to the MultiSource and the fixture must be
secure. Tighten any screws on the DB connectors, andmake sure all connections are in good condition.

See the manual of your laser and fixture for additional safety and operational
information.

Page 20 · 7144 Series Laser MultiSource User’s Manual

Wiring and Grounding Considerations
In order to minimize grounding issues, all signal and ground connections on theMultiSource are isolated from earth ground. The Laser Output connector does
include an Earth Ground pin, but this is to provide a grounding path to aremotely attached fixture, and does not interact with any of the other signal pins.

CAUTION
Laser and sensor connections must be isolated from allother signals and from earth ground or damage to the
instrument many occur.

A key feature of the MultiSource is the optical isolation of the photodiode input
from the laser output. By isolating the photodiode, earth grounding of thephotodiode anode or cathode cannot cause a ground loop through the
instrument. Likewise, the laser anode and cathode connections are also isolated
from earth ground.
However, if you use the earth ground pin of the Output connector (pin A2), it ispossible to create a ground loop if the instrument’s earth ground is connected toa fixture or optical table that is also earth grounded. Make sure that from yourlaser diode package there is only a single path to earth ground.
The Ethernet, USB, Chassis Interlock, and Auxiliary Digital I/O pins can beconnected to earth ground without affecting the operation of the instrument.

7144 Series Laser MultiSource User’s Manual · Page 21

Using the Auxiliary Interface
The Auxiliary Interface (4-pin Phoenix connector) of the MultiSource has one
digital input and one digital output that can be programmed for a variety offunctions. It also supports a +5V auxiliary interface that can be used to power
external circuitry or relays.
The digital input can be monitored through user software and used to trigger
whatever actions the user program defines. Via the System Menu AuxOut menu
entry, the auxiliary output can be directly set to be Off (0V) or On (5V), or
assigned as a summary function to control its output state. The available
functions are:•••

All Low – the digital output will only turn on when all channels are off.
Any High – the digital output will turn on when any channel is on.
All High – the digital output will only turn on when all channels are on.

The digital output includes a 200Ω series resistor, limiting current draw to about
25mA. If the output is to be used as a signaling LED, an additional current
limiting resistor may be required.
The auxiliary digital I/O shares a common ground with the Interlock Interface. If
left unconnected, the digital input will be pulled up into an ‘On’ or ‘Open’ state
via an internal pull-up resistor.
Likewise, the +5V power supply is also isolated and can provide up to 200mA of
isolated 5V power.

Using the System Interlock
The MultiSource has a dedicated system Interlock input that can be used todisable all Laser outputs.
The Interlock input is an electrically isolated input allowing for safe integration
into both mechanical-type switch closures as well as electronic switches. It has apull-up resistor, so if left disconnected, the interlock status will be “on” or open.
The system interlock is a software-monitored interlock, which means there could
be up to 100ms latency between the interlock opening and the lasers shutting
down.
The Interlock shares a common ground with the auxiliary digital I/O.

Page 22 · 7144 Series Laser MultiSource User’s Manual

Using the Laser Interlock/LED Interface
In addition to the Auxiliary Interface and System Interlock described above, theMultiSource also features a combination interlock/LED driver on the output
connector of each channel.
When the laser is off, the input can be monitor for switch closure, and the LED
can be turned on or set into a flashing mode (the LED will light only if the circuit
is complete, meaning any external switch must be closed).
When the laser is on, the LED is always on, and the input acts as a hardwareinterlock, and will immediately shutdown the laser is the circuit is broken.
Closing the Circuit
A +5V supply is used to bias the LED and goes through a 200Ω series resistor.
To close the circuit, there must be 4.5V or less across pins 13 and 12. A shortcircuit can be used, but an LED can optionally be connected.
Depending on the type of LED, no resistor, series resistor, or parallel resistor canbe used. Red, green, and yellow LEDs may require no resistor. Blue LEDs are
too efficient to be wired with a series resistor and must use the parallel resistor
option.
When using a series resistor, the higher the resistor value, the dimmer the LED.
Do not use too high of a resistance value or it may always register as an open
circuit.
When using a parallel resistor, the lower the resistor value, the dimmer the LED.
Red, green, and yellow LEDs will typically use higher resistances (1kΩ or more),
while blue LEDs will use smaller resistor values (typically around 100Ω).
Pin 1

Pin 1

Pin 1

Pin 2

Pin 2

Pin 2

No Resistor

Series Resistor

Parallel Resistor

7144 Series Laser MultiSource User’s Manual · Page 23

Using the Laser Driver
The MultiSource is a 4-channel laser driver, but each channel is fully
independent, with channel-specific set points, limits, and operating modes. The
operations described below can be carried out independently on any or all of
the channels.

Laser Control Modes
The MultiSource offers the following control modes: Io (ACC), Io HiBW (ACC),
Im (AMC), Po (APC), and Vf (AVC). Each channel is fully independent and canoperate in any mode.
Changing the control mode is done through the menu by changing the Modeparameter in the Laser menu to one of these values.
Io and Io HiBW modes (referred to collectively as ACC, or automatic current
control modes) are used to drive a specific current through the laser diode.
When in this mode, the set point will be in milliamps, and the MultiSource will
drive the desired current through the laser diode as long as the voltage at thechosen set point does not exceed the voltage limit. For units with the optional
analog modulation input capability, Io HiBW mode is available for modulation at
bandwidths above 10 Hz bandwidth.
Im mode (also referred to as AMC, or automatic monitor photodiode controlmode) is used to control the laser diode using the monitor diode feedback. You
select the target monitor diode current, and the MultiSource will drive exactly
enough forward current through the laser diode to generate the selected monitor
diode current.
Po mode (also referred to as APC, or automatic power control, mode) is simply
Im mode with a mathematical constant applied to the set point, providing a
convenient way of operating in milliwatts. Using the PD Resp factor (in μA/mW),a Po set point is internally converted to an equivalent Im set point by the driver,which is then used to control the photodiode feedback. For example, if the PD
Resp factor was 10, then a set point of 1mW would be the same as a set point of
10μA.
Vf mode (also referred to as AVC, or automatic voltage control, mode) is used tocontrol the voltage driven through the device. Unlike ACC mode, AVC mode
allows the current to drive to whatever current is necessary to achieve thevoltage set point, so long as it does not exceed the current limit.

Page 24 · 7144 Series Laser MultiSource User’s Manual

Modulation (Optional)
Certain models support external analog modulation using the Modulation input
for each channel. Modulation rates vary by model, so see your model’s
specification for the maximum modulation rates. Only Io HiBW mode supports
high speed modulation. All other modes of operation have a modulation
bandwidth of 10Hz or less.

Using the Laser Limits
Both the laser current and voltage limits are implemented in hardware, providing
for fast response to changes in laser diode operation. When a voltage limit isdetected, the output is immediately shutdown. Because of the sensitivity of thevoltage limit, operating near the limit (within one to two hundred millivolts) is notrecommended. In general, you should set the voltage limit at least to 0.1V to
0.2V higher than any anticipated operating point, and 0.5V higher is typicallyused. The voltage limit is tested against the voltage at the connector, unless inremote voltage sense mode. Any Laser Cable R value is ignored, as Laser
Cable R is a software only calculation, and the voltage limit is implemented in
hardware. See Using the Cable R Setting, above, for more information on theLaser Cable R setting.
Unlike the voltage limit, the current limit simply prevents the MultiSource fromdelivering more current than the limit is set to. When the current limit engages,
the output will remain on (unless Off if I Lim enabled in the Advanced Menu or
LAS:ENAB:OUTOFF register).
The photodiode current and photodiode power limits are implemented insoftware and may take up to one second to trigger when these conditions occur,and therefore should not be relied on to provide fast protection of the laser
diode.

7144 Series Laser MultiSource User’s Manual · Page 25

Analog Modulation (Optional Feature)
If your unit includes the optional analog modulation input capability, this allows
for external control of the current set point using a 0 to 10V analog signal. 10V
equals the maximum operating range, which is dependent on the model. For
example, applying 10V to a 7144-0.5-08 will drive an output current of 500 mA,
meaning a “transfer function” of 50 mA per Volt.
In addition, the set point adds to the modulation input, so using the same
example, if you were to apply 5V and the set point was 10mA, then the resulting
drive current would be 260mA (5V = 250mA plus the 10mA set point).
You must also consider that the modulation input is not a precision input, so for
accurate current control, you should calibrate the modulation input using a one
point or two-point calibration and apply the calibration to your voltage input. You
can read actual current using the LAS:I? query.
When modulating at higher frequencies (>1 kHz), it is critical that high quality,
shielded twisted pair cabling be used, and wire size suitable for the appliedcurrent (or the equivalent if using a multi-conductor cable). Failure to do so may
result in current oscillations or excessive overshoots that may damage yourlaser. When operating in these modes, always use shielded cable and never use
individual wires to connect the instrument to your laser. If in doubt, use a current
probe attached to an oscilloscope to monitor actual performance.

Page 26 · 7144 Series Laser MultiSource User’s Manual

Compensating for Voltage Loss
All cables and connectors have a small, but measurable, resistance. Whendriving current through them, this resistance causes a voltage loss in the cable,
and if not compensated for, will result in errors in laser or LED voltage
measurement. In many cases, this is not a problem, as highly accurate voltage
measurement is not required, and the error can be ignored. However, if accurate
voltage measurements are required, the MultiSource offers two methods tocompensate for this loss: the Cable R setting and four-wire sense. Cable R
compensation is software only, so it requires no special wiring to implement.
Four-wire sense, on the other hand, does require additional wiring, but is themost accurate method. Details on both are found below.
Using Remote Voltage Sense
The MultiSource supports remote (4-wire type) voltage measurement of thelaser diode, providing a higher accuracy voltage measurement by directly
measuring voltage at the diode itself. While the Cable R setting described below
can provide some of the same benefits of remote voltage sense, remote voltage
sense is a superior method, and they differ in a few key ways:
1.
2.
3.
4.

No need to calculate cable resistance
Voltage measurement is accurate even if the cable resistance changes
The hardware safety circuits use the remote voltage, providing for agreater degree of protection (Vf Limit works on the remote voltage at
the laser rather than the local voltage at the connector)
Works in voltage control mode

The diagram below shows conceptually how to wire the laser to theMultiSource, using a 4-wire connection:
4
5

7144
9
8

LDC Voltage Sense
LDC
LDA
LDA Voltage Sense

However, remote voltage sense does have a few drawbacks:
1.
2.

If the remote sense wires are disconnected, it disables the hardware
voltage limit as well as the measurement of laser voltage.
Requires two additional wires to be run to the device.

7144 Series Laser MultiSource User’s Manual · Page 27

Using remote voltage sense is very simple. First connect pin 4 of the Laser
Output to the laser cathode, and pin 8 to the laser anode, then in the menu, set
Vf Sense to Remote. Indicated voltage will now be the remote diode voltage.
When using remote voltage sense, any Cable R setting is ignored.
Using the ‘Cable R’ Setting
The Cable R setting allows you to calculate the voltage at the laser by
subtracting the voltage loss through the cable and connectors. This is done bymeasuring or calculating the cable resistance and entering the value, in ohms,
into the menu. The instrument will then use the V = I * R formula to calculate thevoltage loss in the cable and subtract that from the actual measured voltage,displaying the result as Vf on the display.
Common values for Cable R range from 0.0300 Ω to 0.0900 Ω but can besignificantly higher if you have long runs, many connector interfaces, or small
gauge wire.
While it is possible to use a DMM to measure the resistance of the cable,
because resistance is so small, you will not typically get proper readings (mostDMMs are not designed to properly measure small resistances). A better
approach is to use the instrument to drive current through the system and thenmeasure the voltage loss to determine resistance. There are two ways to best
calculate the voltage loss:
Measure the Voltage at the Laser
If you have an accurate DMM and can measure the voltage across the laser (oraccurately know the voltage of the laser at a specific current) and voltage acrossthe pins at the Laser Output connector, then the difference between themeasured voltages is the voltage loss in the cable. Use this formula to calculate
resistance:

Cable R =VOutput − Vlaser
I AMPS

Note that the current is expressed in amps, not milliamps, so divide the set pointby 1000 before using it in this equation.
Short the Connection at the End of the Cable
A second method, which does not require a DMM and can be done with just theMultiSource, is to short the anode and cathode wires at the end of the cable(nearest the laser diode), drive current through the cable and note the indicatedvoltage on the MultiSource. The resistance is found using a simpler version of
the formula above:

Page 28 · 7144 Series Laser MultiSource User’s Manual

Cable R =Vf
I AMPS

Note that the current is expressed in amps, not milliamps.
To short the cable, disconnect the laser and short the anode and cathode
together as close to the end of the cable as possible. Ideally, the short should bedone by soldering the anode and cathode wires together to minimize theresistance in the short itself.
How the Calculation Is Used
The MultiSource continuously takes the measured current, multiplies it by theresistance (Cable R), subtracts the result from the actual voltage at the output
connector, and displays this value on screen as Vf. However, there are some
limitations to how the cable loss calculation is used:
1.

2.

The value for Vf Limit is always the voltage at the connector (except
when using remote voltage sense, see above). This means that the Vf
Limit must take into account all the voltage required, including thecable loss (i.e., the voltage displayed if the Cable R value were zero).
Cable R is ignored in Vf mode. This means that the set point andmeasured voltage are always the voltages at the connector, and Cable
R is not used.

7144 Series Laser MultiSource User’s Manual · Page 29

User Calibration
The MultiSource supports the ability to apply a user calibration to allmeasurement and control functions of the instrument. This allows for fieldcalibration of the instrument as needed to meet the requirements of the user’s
application.

NOTE
Changing the user calibration parameters directly
modifies the performance of the instrument. Usercalibrations should only be performed by individuals
experienced in instrument calibration.

NOTE
Ensure that the standards used to calibrate theinstrument exceed the instrument’s specifications. A test
uncertainty ratio of 4:1 or better is recommended, unlessotherwise required by your application.
User calibration can only be performed by sending appropriate commands tothe instrument over the computer interface (either USB or Ethernet). The
commands are more fully documented in the Computer Interfacing Manual, but
the essential commands are:
LAS:USERCAL:EDIT
LAS:USERCAL:PUT
LAS:USERCAL:GET
LAS:USERCAL:RESET

Enabled modification of user calibration settings
Changes user calibration settings
Retrieves user calibration settings
Resets all user calibration settings to factory defaults

To prevent accidental modification of the calibration settings, the entries are only
editable when LAS:USERCAL:EDIT 1 command is sent remotely. By default, M
and B values are 1.000 and 0.00, respectively, but can be adjusted to change
the sensor measurement. The calibrated measurement is computed as follows:
User calibrated reading = M * reading + B
For set point, such as Io set and analog output, the set point is calculated asfollows:
User calibrated setpoint = M * set point + B
B is always in the units of the measurement being calibrated (for example,
milliamps for Io, volts for Vf, ohms for sensor resistance, etc.).

Page 30 · 7144 Series Laser MultiSource User’s Manual

Specifications
All specifications stated after 1 hour warm-up.
Description

Laser Specifications
7144-0.5-08 7144-01-08 7144-02-04 7144-04-04

LASER

SETPOINTLASER CURRENT
Range (mA)
Max Resolution (mA)
Accuracy (±[% set+mA])
Stability (ppm, time)
Temperature Coeff (ppm/°C)
Noise/Ripple (μA rms)1
Transients (μA)
Compliance Voltage (V)PHOTODIODE CURRENT
Range (μA)
Resolution (μA)
Accuracy (±[% set+μA])
Stability (ppm, time)
Temperature Coeff (ppm/°C)
PD Bias (V)LASER VOLTAGE
Range (V)Resolution (V)Accuracy (±[% set+V])
Stability (ppm, time)
Temperature Coeff (ppm/°C)
EXTERNAL MODULATION
Input Range (V)Modulation Bandwidth (kHz)MEASUREMENTLASER CURRENT
Resolution (mA)
Accuracy (±[% set+mA])
LASER VOLTAGE
Resolution (V)Accuracy (±[% read+V])
PHOTODIODE CURRENT
Resolution (μA)
Accuracy (±[% read+μA])
LIMITSLASER CURRENT
Resolution (mA)
Accuracy (±% FS)
LASER VOLTAGE
Resolution (V)Accuracy (±% FS)

500
0.02

1000
0.05

2000
0.1

4000
0.2

0.025% + 0.12

0.025% + 0.3

0.05% + 0.4

0.05% + 0.8

<4

< 150
8

< 10, 1 hour
50
<8
< 20
< 250
< 350
8
4
2 – 5,000
0.1
0.05% + 1
< 200, 24 hours< 200-3V, fixed

0–8

0–8

0–4
0.001
0.05% + 0.005< 50, 1 hour
< 100

100

85

0–4

0 – 10
75

65

0.02

0.05

0.1

0.2

0.025% + 0.12

0.025% + 0.3

0.05% + 0.4

0.05% + 0.8

0.001
0.05% + 0.005
0.1
0.05% + 1

1
1%
0.1
2.5%

GENERAL
1

< 25
< 500
4

Noise measured across non-inductive resistor in low bandwidth mode

7144 Series Laser MultiSource User’s Manual · Page 31

Description
Display Type
Laser Connector
Computer Interface
Power (50/60 Hz)
Size (H x W x D) [inches (mm)]Operating Temperature
Storage Temperature

Laser Specifications
2x20 VFD
DB9 x 4, female
USB 2.0 Full Speed and Ethernet
90 – 240 V, 50 / 60 Hz
1.75 (45) x 19 (483) x 14.76 (375)+10°C to +40°C-20°C to +60°C

Page 32 · 7144 Series Laser MultiSource User’s Manual

Error Messages
Error
Code

Description

Cause

E-100

General Error

E-102
E-123

Message too long
Path not foundE-124

Data mismatch

E-126
E-127

Too few or too many
elements
Change not Allowed

E-201

Data out of range

E-202

Invalid data type

E-204

Suffix not valid

E-220

Script Save Failed

E-221

Cannot embed
scriptE-222

Cannot execute
script

The error code is non-specific, and is generally used
when no other error code is suitable.
The message is too long to process (USB/Serial only).
The message used an invalid path command(USB/Serial only).
The message contained data that did not match the
expected format (USB/Serial only).
An incorrect number of parameters was passed to acommand.
An attempt was made to change a parameter thatcannot be changed, or is currently read-only.
The message attempted to set a value that wasoutside the allowable range (USB/Serial only).
When trying to parse the message, the data was in an
invalid format (USB/Serial only).
An invalid number base suffix (radix) was encounteredwhen parsing a number (USB/Serial only).
At attempt to save a script failed. This can be caused if
the script number is out of range, or the script
memory is corrupted.
A script was executed that contained a reference toanother script.
At attempt to execute a script failed. This can becaused if the script number is out of range, no script
exists for the selected index, or the script memory is
corrupted.
The interlock input (pins 1 and 2 of the output
connector) were not shorted when the output was on.
The laser output was turned off because a current limit
was detected and the corresponding bit in the
OUTOFF register was set.
The laser voltage exceeded the voltage limit and theoutput was turned off.
The laser output was turned off because a photodiodecurrent limit was detected and the corresponding bit
in the OUTOFF register was set.
The laser output was turned off because a photodiodepower limit was detected and the corresponding bit in
the OUTOFF register was set.
The laser output was turned off because the TEC wasoff and the corresponding bit in the OUTOFF register
was set.
The laser output was turned off because a shortcondition was detected and the corresponding bit in
the OUTOFF register was set.
The laser output was turned off because an out-oftolerance condition was detected and thecorresponding bit in the OUTOFF register was set.
A hardware control error was detected which forced a

E-501
E-504
E-505
E-506
E-507
E-508

Interlock shutdown
outputLaser current limit
disabled output.
Laser voltage limit
disabled output
Laser photodiodecurrent limit
disabled output
Laser photodiodepower limit disabled
output
TEC off disabled
outputE-509

Laser short circuitdisabled output

E-510

Laser out of
tolerance disabled
outputLaser control error

E-511

7144 Series Laser MultiSource User’s Manual · Page 33

E-537

disabled output
Power failure
Laser mode change
disabled output
Incorrect
configuration for
calibration to start
Calibration musthave the output on
to start
Po mode selectedwith PD Response
set to zero
Calibration
cancelled
Thermal trip

I-703

Laser usercal reset

W-800

Remote voltage
sense is low

W-803

User reset to factory
defaults
Module Offline
Slave module X
communication
failureNetwork Interface
Error
Hardware-related
errors

E-512
E-514
E-516
E-517
E-534
E-535

E-980
E-981
thru
E-984
E-989
E-990
thru
E-997
E-998
E-999

Command notsupported
Non-specific error

shutdown of the laser output.
A power failure was detected.
A change in the operating mode of the MultiSource
while the output was on shutdown the output.
The MultiSource was not configured properly,
including the mode and output on state, to be able tostart the desired calibration process.
The laser output must be on for the calibration
process to start.
Attempted to select Po mode and PD Response waszero, or MultiSource was in Po mode and PD
Response was set to zero.
The active calibration process was cancelled.
Excessive power dissipated inside unit. Lower voltage
limit or add series resistance. See “Thermal
Considerations” for more details.
The laser user calibration data was reset to factory
defaults.
When in remote voltage sense mode, the MultiSource
detected a significant difference between the remotevoltage and the voltage at the connector, which may
indicate a problem with the remote voltage senseconnection.
Notification message only: User pressed key
sequence on start-up to reset unit to factory defaults.
Communications was attempted to off-line module.
A communication failure to the referenced slave
module was detected. Slave module taken offline.
Failure to communicate with network interface.
A hardware related error occurred. Attempt a power
cycle to resolve. If error continues to occur, contact
factory.
A command was recognized but not supported by theMultiSource.
A non-specific error was encountered.

Page 34 · 7144 Series Laser MultiSource User’s Manual

Maintenance and Service
Maintenance
The MultiSource requires no regular maintenance other than productcalibration. To clean the instrument, use cotton cloth that is only damp (not wet)with a light solution of soap and water.
Fuses
Under normal operation, you should never need to replace a fuse. However, ifeither fuse does blow, use only Time Delay/Slow Blow T 250V, 10A, IEC 60127-2
5x20mm metric fuses as replacements.
If, after replacing the fuse, it continues to blow, immediately discontinue use of
the instrument and contact service for support.
Service
Service and repair for the MultiSource can be obtained by contacting the
distributor from where you purchased the instrument, or directly from Arroyo
Instruments. A complete list of distributors is available on the Arroyo Instruments
web site.
You can contact Arroyo Instruments through one of these methods:
By mail:By phone:
By fax:By email:On the web:Arroyo Instruments
1201 Prospect Street
San Luis Obispo, CA 93401
USA+1 (805) 543-1302+1 (805) 543-1303
support@arroyoinstruments.com
http://www.arroyoinstruments.com

In all cases, Arroyo Instruments requires a return materials authorization (RMA)
number. You must contact Arroyo Instruments and obtain an RMA number prior
to returning your instrument, or the shipment may be rejected and sent back toyou.

7144 Series Laser MultiSource User’s Manual · Page 35

Warranty
Arroyo Instruments warrants that this product will be free from defects in material
and workmanship and will comply with Arroyo Instruments’ publishedspecifications at the time of sale for a period of one year from date of shipment.
If found to be defective during the warranty period, the product will either be
repaired or replaced at Arroyo Instruments’ option.
To exercise this warranty, write or call your local Arroyo Instruments
representative, or contact the factory directly at the address given above. You
will be given prompt assistance and return instructions. Send the product, freight
prepaid, to the indicated service facility. Repairs will be made and the instrument
returned freight prepaid. Repaired products are warranted for the balance of theoriginal warranty period or 90 days, whichever first occurs.
Limitation of Warranty
The above warranties do not apply to products which have been repaired or
modified without Arroyo Instruments’ written approval, or products subjected tounusual physical, thermal or electrical stress, improper installation, misuse,abuse, accident or negligence in use, storage, transportation or handling. This
warranty also does not apply to fuses, batteries, or damage from battery
leakage.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED ORIMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. ARROYO INSTRUMENTS SHALL NOT BE
LIABLE FOR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGESRESULTING FROM THE PURCHASE OR USE OF ITS PRODUCTS.

Page 36 · 7144 Series Laser MultiSource User’s Manual

EC Declaration of Conformity

EC Declaration of Conformity
I/Weof

Arroyo Instruments
1201 Prospect Street
San Luis Obispo, CAUSAdeclare that7144 Series MultiSource Laser Diode Driver
In accordance with the following European Commission Directives:
2014/30/EU - Electromagnetic compatibility (EMC)
2014/35/EU - Low Voltage Directive (LVD)
2015/863/EU - RoHS Directive
has been designed and manufactured to the following specifications:
Under 2014/30/EU
In accordance with EN 61326-1:2013, Emission

CISPR 11 Class A, Group 1 radiated and conducted emissions

In accordance with EN 61326-1:2013, Immunity

EN 61000-4-2:2009 Electrostatic Discharge: ±4kV contact, ±8kV air
EN 61000-4-3:2010 Radiated Immunity: ±3V/m
EN 61000-4-4:2012 Electrical Fast Transients/Burst: ±1kV AC, ±0.5kV I/O
EN 61000-4-5:2014 Surges: ±0.5kV differential mode, ±1kV common mode
EN 61000-4-6:2014 Conducted Immunity: 3V
EN 61000-4-11:2004 Supply Dips and Variations: 100%, 60%, 30%

Under 2014/35/EU
In accordance with EN 61010-1:2010
This Certificate is the Manufacturer’s Declaration which states that the 7144 SeriesMultiSource Laser Diode Driver is Compliant to the above noted EU Directives andtherefore eligible to bear the CE MARK.
I hereby declare that the equipment named above has been designed to comply with therelevant sections of the above referenced specifications. The unit complies with all
essential requirements of the Directives.
Paul Corr(NAME OF AUTHORIZED PERSON)

President(TITLE OF AUTHORIZED PERSON)(SIGNATURE OF AUTHORIZED PERSON)

March 23, 2018

(DATE OF ISSUE)

7144 Series Laser MultiSource User’s Manual · Page 37

UK Declaration of Conformity

UK Declaration of Conformity
I/Weof

Arroyo Instruments
1201 Prospect Street
San Luis Obispo, CAUSAdeclare that7144 Series MultiSource Laser Diode Driver
In accordance with the following U.K. Legislation Regulations:Electrical Equipment (Safety) Regulations 2016
Electromagnetic Compatibility (EMC) Regulations 2016has been designed and manufactured to the following specifications:
Under Electromagnetic Compatibility (EMC) Regulations 2016
In accordance with EN 61326-1:2013, Emission

CISPR 11 Class A, Group 1 radiated and conducted emissions

In accordance with EN 61326-1:2013, Immunity

EN 61000-4-2:2009 Electrostatic Discharge: ±4kV contact, ±8kV air
EN 61000-4-3:2010 Radiated Immunity: ±3V/m
EN 61000-4-4:2012 Electrical Fast Transients/Burst: ±1kV AC, ±0.5kV I/O
EN 61000-4-5:2014 Surges: ±0.5kV differential mode, ±1kV common mode
EN 61000-4-6:2014 Conducted Immunity: 3V
EN 61000-4-11:2004 Supply Dips and Variations: 100%, 60%, 30%

Under Electrical Equipment (Safety) Regulations 2016
In accordance with EN 61010-1:2010
This Certificate is the Manufacturer’s Declaration which states that the 7144 SeriesMultiSource Laser Diode Driver is Compliant to the above noted U.K. Legislation andtherefore eligible to bear the UKCA MARK.
I hereby declare that the equipment named above has been designed to comply with therelevant sections of the above referenced specifications. The unit complies with all
essential requirements of the U.K. Legislation Regulations.
Paul Corr(NAME OF AUTHORIZED PERSON)

President(TITLE OF AUTHORIZED PERSON)(SIGNATURE OF AUTHORIZED PERSON)

September 27, 2022

(DATE OF ISSUE)

Page 38 · 7144 Series Laser MultiSource User’s Manual

NOTES:

7144 Series Laser MultiSource User’s Manual · Page 39

NOTES:

Page 40 · 7144 Series Laser MultiSource User’s Manual

Copyright © 2022, Arroyo Instruments. All Rights Reserved.

P/N 530-1054 Rev C