RoHS

READ THE INSTRUCTION MANUAL BEFORE USINGINSTRUCTION MANUALMANOSTAR DIGITAL SENSOR
QDP33

No. TR-QDP33-E05

1-2-3,Nishishiriike-cho,Nagata-ku,Kobe,653-0031 JAPANTEL. +81-78-631-6000 FAX. +81-78-631-6020

TABLE OF CONTENTS
PAGE

Introduction ································································································································ 1
I. Cautions ····································································································································· 2
II. Names of Parts ······················································································································ 3III. Installation
1. Installation location ········································································································ 4
2. Instrument installation ·································································································· 4
3. Wiring ···································································································································· 7
4. Tubing
4-1 Measurement pressure and tube connection ··········································· 8
4-2 Piping material ······································································································ 9
4-3 Cautions for tubing ····························································································· 9
5. Cautions before power-on ························································································ 9
6. Accessory for QDP33 ································································································ 9
IV. Operation
1. When operating this instrument ············································································ 11
2. Operation panel··········································································································· 11
3. Operation method ······································································································ 11
4. When an error occurs ······························································································· 15
V. Description of Modes
1. Pressure display mode
1-1 Normal display ···································································································· 16
1-2 Over range display ···························································································· 16
1-3 Display during sleep ·························································································· 16
2. Quick setting mode····································································································
2-1 Zero adjustment ································································································· 16
2-2 Setting value protection ················································································· 16
2-3 Max./min. value display ··················································································· 17
3. Main setting mode
3-1 Pressure setting points (P1, P2) ································································· 18
3-2 Pressure setting points (Hi, Lo) ··································································· 19
4. Sub setting mode
4-1 Output function ·································································································· 20
4-2 Output mode ······································································································· 20
4-3 On-delay/off-delay time ················································································ 20
4-4 Power supply on-delay time·········································································· 20
5. Detailed setting mode·······························································································
5-1 Sub-screen display setting ············································································ 21
5-2 Display filter ········································································································ 21
5-3 Output filter ········································································································· 21
5-4 Display low-cut ·································································································· 21
5-5 Output low-cut··································································································· 21
5-6 Main screen display color ··············································································· 22
5-7 Low-power consumption ················································································ 22
5-8 Measurement display sign inversion ··························································· 22
5-9 Analog output inversion ·················································································· 22
5-10 Test mode ·········································································································· 22
5-11 Setting value clear·························································································· 22
VI. Periodic Calibration ·········································································································· 23
VII. Product Warranty ············································································································ 23
VIII. Service ································································································································ 23

Introduction
Thank you very much for purchasing the Manostar Digital Sensor, Type QDP33.

Features of this product- Compact
This product is a compact differential pressure sensor in which a capacitance type pressure sensor and display/output
functions are incorporated into a 30 mm square.
- Large 12-segment LCD
A 12-segment LCD with a character height of 9 mm is used on the display part of the main screen.
- White backlight
A white LED with good visibility is used for the display backlight of the main screen. It is also possible to switch thebacklight to that of a red LED.
- Sub-screen display
This product is equipped with a sub-screen to display mode names etc.
- 2 system comparison output
This instrument contains a comparison output function that can detect pressure drops and pressure rises. Each system
has one transistor output and one output monitor LCD. By using output mode settings and/or delay functions, this
instrument can flexibly correspond to the specification of an externally connected device.
- Analog output
This instrument contains an analog output function according to the pressure indication value.
- Display filter function
This function can reduce the fluctuations in the display value.
- Output filter function
This function can reduce the fluctuations in the output value.
- Low-power consumption mode function
Power consumption during operation can be reduced.
- Setting value protection function
This function prevents setting mistakes due to erroneous operations.
- Test mode function
Even when pressure is not actually applied, the comparison output and analog output at times of installation andinspection can be checked by setting a simulated pressure.
- Max./min. value retention function
It is possible to retain and display the max./min. values of the measurement pressure.
- Measurement display sign inversion function
It is possible to invert the sign of the pressure display value.
- Analog output inversion function
Although the analog output value rises along with pressure rises, it is possible to realize the reverse action by turning on
the analog output inversion function.
- Sub-screen display setting function
It is possible to set any characteristic string in the sub-screen.
- EU Directive conforming productThis instrument has been tested according to EMC standard EN IEC 61326-1:2021, and test levels have been applied toqualify for operation in an industrial environment.
- UL-approved product△！

CautionFor safety use- Before using this instrument, read this instruction manual thoroughly to ensure proper and safe use.
Incorrect use may lead to a failure, damage, or accident.
- Keep this instruction manual in a safe place.

1

I. Cautions△Warning！

- Do not use this instrument for pressure measurement of combustible gas or in an atmosphere of combustible gas.
This instrument is not explosion-proof. If it is used for pressure measurement of combustible gas or in an atmosphere of
combustible gas, there is a risk of ignition.
- Do not use this instrument for pressure measurement of corrosive or toxic gases.
This instrument is not of a corrosion resistance construction. If it is used for pressure measurement of corrosive or toxic
gases, the internal mechanism may corrode and the gas may release, and there may be a risk of harm to humans.
- Do not apply more pressure than the withstand pressure of the instrument.
If more pressure than the withstand pressure of the pressure receiving element is applied, the pressure receiving partmay be damaged, and this may cause injury and/or disaster.
If more pressure than the withstand pressure of the instrument body is applied, the body may be damaged, and this may
cause injury and/or a disaster.
- Do not use this instrument for pressure measurement of gases other than air and inert gases.
If it is used for pressure measurement of water or oil, it may fail, and this may cause injury and/or a disaster.
- Do not use this instrument in places subject to extreme vibration and shock.
If it is used in places subject to extreme vibration and shock, it may lead to performance degradation or failure, and thismay cause injury or a disaster.
- Avoid using this instrument in places exposed to rainwater or other liquids.
This instrument is not of waterproof construction. If it is exposed to rainwater or other liquids, it may fail, and this may
cause injury and/or a disaster.
- Use the power supply within the specified rated voltage.
If a power supply outside the specified rating, this may cause fire or electric shock.
- Connect the external wiring correctly.
Incorrect wiring may cause injury or a disaster.
- Use this instrument within the service temperature and humidity.
If it is used outside the service temperature and/or humidity, it may fail, and this may cause injury or a disaster.
- Do not disassemble or modify this instrument.
Disassembly or modification may not only void the warranty, but also may lead to performance degradation or failure, andthis may cause injury or a disaster.

△Caution！

- As to where to install and how to install this instrument, be sure to follow this instruction manual.
- Use this instrument in indoor, dry, and clean places.
If it is used in places subject to direct sunlight or humidity, this may cause deterioration or failure.
- Electromagnetic emissions exceeding the requirements of the test standard can occur when the instrument isconnected to a test object.
- Keep this instrument away from any device generating a strong electromagnetic field as much as possible.
If this instrument installed in strong electromagnetic field, it may cause the drift of accuracy display to be max.4%FS.
- When conforming this instrument to UL standards, use a National Electrical Code (NEC) Class 2 or LPS (Limited Power
Source) power supply for the DC power supply connected to this instrument.
- Operate the switches with your fingers.
Using a hard or sharp object to press it may damage the surface, and this may cause breakage or failure.
- Do not allow a sharp object to contact with the printed surface.
This may cause the printing to peel off.
- To remove dirt on the display surface, use adhesive tape or a lens cloth.
Using chemicals, such as detergents, on the display surface may make the display surface opaque or damage the surface.
- To remove dirt other than that on the display surface, wipe off using a cloth soaked with a mild neutral detergent.
Using an organic solvent may corrode the surface, and this may cause cracks in the resin.
- Pay attention to dropping of this product.
The Manostar product is a precision instrument. If it is dropped, the internal mechanism and the exterior may bedamaged.
- Do not pull the tube forcibly.
Pulling the tube forcibly may damage the pressure port.

2II. Names of Parts
Fig.2-(1). Names of Parts
RITS connector 6P(CN1)

654 3 2 1

Main screen
Sub-screen
Comparison output 1
indication lamp

Comparison output 2
indication lamp
Down key

Up keyMode key※ Comparison output indication lamp
ON: contact condition is “close”
OFF: contact condition is “open”

3

H
High-pressure side
piping connectorL
Low-pressure side
piping connector

III. Installation
Before using this instrument, check that the product type is correct or that the operating environment, pressure, andtubing conditions meet the product specifications as listed on the specification sheet.

1. Installation location
When installing this instrument, avoid the following places.
- Places with extreme vibration or shock, or places subject to continuous vibration or shock- Places subject to sudden changes in ambient temperature or places subject to direct sunlight- Humid places, places subject to water/oil, or dusty places- Places where corrosive gas or combustible gas is generated

2. Instrument installation (Be sure to install this instrument on a vertical surface.)
Install the body to the panel by using the front panel adaptor and the back panel adaptor or the metal bracket set.

Fig.3-(1-1). Panel Installation Drawing and Panel Cut Dimension Panel cut 31mm

Back panel adaptor

Allowable thickness of panel 1～6mm

For installation of one unit
QDP33

0.0

31 -0.4

0.0

31 -0.4

Front panel adaptor 31mm

For installation of n units horizontally

For installation of n units vertically55

55

31×ｎ＋3.5×(ｎ－1)

0.0

31 -0.4

31×ｎ＋3.5×(ｎ－1)

0.0

31 -0.4

4

Fig.3-(1-2). Panel Installation Drawing and Panel Cut Dimension Panel cut 36mm

Back panel adaptor

Allowable thickness of panel 1～6mm

For installation of one unit
+0.5

36 0.0

QDP33

+0.5

36 0.0

Front panel adaptor 36mm

For installation of n units horizontally

For installation of n units vertically55 or more

36×ｎ＋4×(ｎ－1)+0.5
55 or more

36 0.036×ｎ＋4×(ｎ－1)+0.5

36 0.05

Fig.3-(1-3). Metal bracket set Installation drawing
Install Direction 1:
21.5

14.5
32

9.5

4.2

4×
(R)

Use M3 screws attached

(1.2)

45

30

49

6 5 4 3 2 1

15

(1.5)

30
Metal bracket

Install Direction 2:

18.7

4.2

9.5

4×
(R)

14.5

21.5

(1.5)
(1.2)

15

45

30

49

6 5 4 3 2 1

30

63. Wiring
Pay attention to the following points when wiring. Fig.3-(2) shows the terminal layout drawing and Fig. 3-(3) shows aconnection example for connecting an external device.

△！

Caution- Press in the connector until it clicks.
- Make sure that each terminal does not exceed the rating shown in the specification.
- Keep the wiring away from the power wiring.
- The power supply 0 V terminal and output common terminal of this instrument are internally connected.
- Pin 6 is an unused terminal; and do not use it because doing so may cause failure.
- Be sure to use a diode for reverse voltage prevention or the like when connecting a relay.
- Wiring should not exceed the length shown below.
Power supply system cable: 30 m
Signal system cable: 30 m
When wiring exceeding the cable length limit as shown above is used, a malfunction may occur dependingon the noise environment of the installation location.

Fig.3-(2). Terminal Layout Drawing
Pin 1: Power supply + (12 – 24 V DC)

6 54 32 1

Pin 2: Power supply - (0 V)
Pin 3: Analog output +Pin 4: Comparison output 1

H

Pin 5: Comparison output 2

L

Pin 6: NC (Unused terminal)

Fig.3-(3). Connection Example

QDP33N type

DC power＋ supply

CN1 (RITS connector 6P)

External device

DC power
supply ＋

CommonPowersupplycircuit

－

－

0V
Load

100mA Max.

100mA Max.

QDP33P type

DC power＋ supply

CN1 (RITS connector 6P)Powersupplycircuit

External device

－

Load

100mA Max.

100mA Max.

7

4. TubingThis instrument is a differential pressure gage and has high-pressure side (H) and low-pressure side (L) pressure portson the back of the instrument.
Additionally, connect the tubes as follows according to the application.

△！

Caution- Tighten the connector with a torque of 1.0～1.2 N･m .
When it is tightened with a torque exceeding the specified value, the instrument meter body andinternal thread may be damaged.
- Be sure to install packing to the connector to use it.

4-1 Measurement pressure and tube connection
Connect the tubes as shown in the following table according to the pressure to be measured. In case of negative
pressure measurement, - (minus) display is possible by turning ON the measurement display sign inversion function.
Measurement pressure

Differential pressure

Application

Differential pressure
measurement

Gage pressure

TubingPositive pressure
measurement

Negative pressure
measurement

High-pressure side
Measurement pressurepressure port
(High)(H)

Measurement pressure(Positive pressure)Open to atmosphere

Low-pressure side
pressure port
(L)

Measurement pressure(Low)

Open to atmosphere

Measurement pressure(Negative pressure)

OFF

OFF

ON

Measurement display
sign inversion function△！

Caution- When measuring the gage pressure using an instrument with a zero center (+ -) range, connect the
tube to the high-pressure side (H) in order to match the polarity of the display sign (+ or -) with that of
the actual pressure in the tube.
- In case of the zero center (+ -) range, turn OFF the measurement display sign inversion function
unless there is a special reason.

Fig.3-(4)Fan△！

CautionWhen opening one connector to the atmosphere,pressure in the panel is applied to the pressure port
opened in the panel (equipment box).

Duct
Measurement port
Equipment box

When the inside of the panel is forcibly air-cooled using
a fan, be sure to provide a port open to the atmosphereoutside the panel.

Tube
ＱＤＰ３３
Cooling air
TubePort open toatmosphere8Fan4-2 Piping material

Fig.3-(5)For tubing material used for piping connectors of thisunit, be sure to use tubing material of I.D. 4.
Vinyl or rubber tubes are suitable.
As shown in Fig.3-(5), when inserting the tube into thepiping connector, be sure to push it in until the tube hit
the bottom of piping connector.

QDP33 body

Tube

Piping connector

4-3 Cautions for tubing
Prohibition of common tubing
Fig.3-(6)Single tubing ○Common tubing ×

Room A

Room B

Room A

Room B

QDP33

QDP33

QDP33

QDP33

Passage

Passage

As shown in Fig.3- (5), the tubes between thedetector and the instrument should be single tubing
for each system, and common tubing with theadjacent system should not be used. When common
tubing is used, the pressures of the systems may
interfere with each other, and this may result in anerror.
Error due to long distance tubing

When the instrument is used for remote monitoring, the response speed will be low. The intermediate tubes should
be as thick as possible. When the tubing conditions of the high-pressure and low-pressure sides differ significantly,
the tubing resistances of the high-pressure side and the low-pressure side also differ. This leads to a pressuretransmission time difference, and an accurate differential pressure cannot be measured.
Prevention of tube clogging by drain
When the drain accumulates in the middle of the tubing, a measurement error of the pressure occurs. Therefore, besure to install the instrument above the pressure extraction port of the pressure detector so that the drain does notaccumulate in the slack formed in the tubing.
If it is unavoidable, install a drain tank in the middle of the tubing and clean it periodically. Check if airtightness ismaintained securely after cleaning.

5. Cautions before power-on
Before powering on this instrument for the first time after installation, pay attention to the following points.
(1) Check again the installation location, environment, installation method, wiring, and tubing for any errors.
Turning on the power with incorrect wiring or tubing may cause a failure of this instrument or a disaster.
(2) Before turning on the power, check that there is no problem with other devices or the equipment to which this
instrument is incorporated even if the comparison circuit of this instrument operates.

6．Accessory for QDP33

Product code

CAB-RITS5-15

Color ofcover

Yellow

RITS 5P cable with connector
Color of
Number of
Insulator
terminal
RITS plug connector 5P
Brown
①
Blue
②
Pink
③
(15)
0
Black
④
1500 +50
White⑤
RITS plug connector 5P (TE Connectivity)

Product code

Color ofcover

1473562-5

Yellow

Applied cable
Nominalcross-sectional areas O.D of the wire cover
0.1～0.5mm2

1.0～1.15mm

9Sheath cable (Black、φ4、5-core)(50)

VT connector for vinyl or rubber tube

PT connector for plastic tube

PR connector for plastic tube

brass-made [ installed ](Nihon Pisco Co., Ltd.)PBT、NBR brass-made [ option ](Nihon Pisco Co., Ltd.)PBT、NBR brass-made [ option ](Nihon Pisco Co., Ltd.)

Product code

Product code

Product code

KGAVT-M5

KGAPT-M5

KGAPR-M5

This connector can beconnected to vinyl or rubber
tube (I.D.4).

The joint installed tube ispush-in type. Use the optional
tube or the applicable tube
(JIS B8381-1).
Hex wrench (hex.2.5) isneeded to install.

Front panel adaptor 31mm

Front panel adaptor 36mm

Back panel adaptor

Polypropylene-made [ option ]Polypropylene-made [ option ]Polypropylene-made [ option ]The joint installed tube ispush-in and rotary elbow type.
Applicable piping material is
the same as PT connector.
Hex wrench (hex.3) is needed
to install.

Product code

Product code

Product code

ADP33-31

ADP33-36

ADP33-B

Panel cut 31×31mm.
This is used with the backpanel adaptor when installingthe body.

Panel cut 31×31mm.
This is used with the backpanel adaptor when installingthe body.

Panel cut 31×31mm.
This is used with the back panel
adaptor when installing thebody.
Metal bracket set

Color cap for PT connector/PR connector

Steel-made [ option ]Polyacetal-made [ option ] (Nihon Pisco Co., Ltd.)

Product code
Product code

High pressure (red) Low pressure (blue)

BRKT-QDP
This is used when installing tofloor or ceiling surface.

△！

CautionKGACAPM6-H

KGACAPM6-L

This is used to recognize high and low pressure by its
color and to prevent tube from coming out accidentally.

- Tighten the connector with a torque of 1.0～1.2 N･m .
When it is tightened with a torque exceeding the specified value, the instrument meter bodyand internal thread may be damaged.
- Be sure to install packing to the connector to use it.
- RITS 5P cable with connector is not UL certified product.
- For crimping wire to connector, a specific RITS plug connector (TE Connectivity), productnumber 1729940-1, must be used.
- For crimping wire to connector, a RITS plug connector must be used.
- RITS plug connector is not compatible to other manufacturer's connector because it is notcompliant with the industry standard “e-CON”. (The standard “e-CON” is only used inJapan.)- For further inquiry on the detail of RITS plug connector and the other tools, please contact TE
Connectivity directly.
- Direction of color cap for PT connector /PR connector
6 54 32 1

Release ringH

L

CorrectWrong

10

Be sure to install the color cap to therelease ring with the correct direction.

IV. Operation
1. When operating this instrument
Be sure to perform zero adjustment when this instrument is installed for the first time or when the zero point fluctuates.
Refer to “2-1 Zero adjustment” on page 16.

2. Operation panel
Fig.4-(1). Operation Panel
Unit

Main screen
Sub-screen
Comparison output 2
indication lamp

Comparison output 1
indication lamp

Down key
MODE

Up keyMode key

3. Operation method
Description of operation switches
MODE

Use this key to switch modes.
Use this key to increase the numeric value. Pressing the key continuously increases the value continuously.
Use this key to decrease the numeric value. Pressing the key continuously decreases the value
continuously.

1) Operation of setting value
The item name is displayed on the sub-screen, and the current setting value is displayed on the main screen. Use theandkeys to change the setting value. Pressing the
key at the upper limit value returns the value
to the lower limit value and pressing the
key at the lower limit value returns the value to the upper limit value.
The range in which setting value can be changed varies depending on each mode.
2） Registration of setting value
When the mode is switched with the MODE key, the setting value is registered in memory at the same time, and it isretained even after the power is turned off. Note that the setting value is not registered by just operating the set
value, but pressing and holding the MODE key for 2 seconds registers the value at the same time as transition to thepressure display.
* Refer to Fig.4- (2) on page 12 and Fig.4- (3) on page 13 for the order of mode switching.

11

Fig.4-(2). Mode Switching (1)Sub setting mode （ＳＥＴ２－ＭＯＤＥ）

Before power-on【Power-on】
MODE

Output 1 function Set the operation mode of the output 1 function.

<For 100 Pa range>

Hysteresis mode
Window mode

Scale min. value display (for 1s)

MODE

Output 1 mode Set the output mode of the output 1.
Scale max. value display (for 1s)

OFF
N.C.
N.O.
MODE

Max. value display

Zero adjustment

Setting value protection

Every
1s

Output 1 on-delay time Set the on-delay time of the output 1 function.

Protection setting

Press and hold for 2s
Retention value clear～

0‒600 s (Unit of 1s)

MODE

Blink once
Output 1 off-delay time Set the off-delay time of the output 1 function.

Alternative operation
for setting/cancellation

Min. value display

Main display
color inversion

Every
1s

～

0‒600 s (Unit of 1s)

Protection cancellation
MODE

Output 1 power supply on-delay time Set the on-delay time of the output 1 power supply.

Press and hold for 2s
Retention value clear

Blink once

～

＋
MODE

MODE

Press andhold for 2s

Pressure display mode

MODE

Output 2 function Set the operation mode of the output 2 function.

When no key is pressed for 15 s, the mode returns to thepressure display mode automatically.
(Except for the sub setting mode and detailed setting mode)

Measurement pressure display

MODE

Upper limit over range display
Single pressure range: +110% FS or higher+- range: +60% FS or higher

Normal display

Hysteresis mode
Window mode

Press andhold for 2s
MODE

MODE

Lower limit over range display
Single pressure range: -10% FS or lower+- range: -60% FS or lower

Display during sleep

0‒20 m (Unit of 1m)＋

Press andhold for 2s

Press andhold for 2s

Output 2 mode Set the output mode of the output 2.
OFF
N.C.
N.O.
MODE

Output 2 on-delay time Set the on-delay time of the output 2 function.

～
MODE

MODE

0‒600s (Unit of 1s)

Press and hold for 2s
MODE

Main setting mode
（ＳＥＴ１－ＭＯＤＥ）

Output 2 off-delay time Set the off-delay time of the output 2 function.

～
MODE

MODE

Output 2 power supply on-delay time Set the on-delay time of the output 2 power supply.

Output 1 function
In window mode

Output 1 function
In hysteresis mode

0‒600s (Unit of 1s)～

0‒20m (Unit of 1m)

MODE

MODE

MODE

Error display (When an error occurs: In case 2 errors occur simultaneously)
MODE

Output 2 function
In hysteresis mode

Measurement
pressure display

MODE

Output 2 function
In window mode

Error code display

Measurement
pressure display

The codes of errors occurring every second are automatically displayed sequentiallybetween the pressure display modes.

Sub-screen display in case of press and hold
MODE

MODE

MODE

MODE

Error code display

Description of marks
MODE

Press <<Mode>> key.
Press <<Up>> key.

The pressure setting points (P1, P2, Hi, Lo) set the pressure values.
Setting range: Within the pressure range
P1: Pressure setting point in the hysteresis modeP2: Hysteresis pressure setting point in the hysteresis mode
Hi : Upper limit pressure setting point in the window mode
Lo: Lower limit pressure setting point in the window mode

Press <<Down>> key.

＋Press the keys simultaneously.
Blinking display

12Fig.4-(3). Mode Switching (2)13Mode List
Mode

Name

type

Sub-screen

Factory default setting
Main screen

Setting range

Pressure display
Quick setting

Setting value

Unit

Normal display―

Pa/kPa―Upper limit over range display―

Pa/kPa―Lower limit over range display―

Pa/kPa―Display during sleep

―

―

―

Zero adjustment

Without zero adjustment―-20 to +20% FS

Setting value protection

OFF―

OFF/ON

Page

P. 16

P. 16
Max. value display――

Pa/kPa―Min. value display――

Pa/kPa―P. 17

Comparison
output 1
Comparison
output 2

Main setting

Hysteresis mode setting point P1――

Single pressure: 90% FS ±: +40% FS

Pa/kPaHysteresis mode setting point P2――

Single pressure: 89% FS ±: +39% FS

Pa/kPaWindow mode setting point Hi――

Single pressure: 90% FS ±: +40% FS

Pa/kPaWindow mode setting point Lo――

Single pressure: 10% FS ±: -40% FS

Pa/kPaSingle pressure: 0 to 100% FS

Hysteresis mode setting point P1――

Single pressure: 10% FS ±: -40% FS

Pa/kPa± : -50 to +50% FS

Hysteresis mode setting point P2――

Single pressure: 11% FS ±: -39% FS

Pa/kPaWindow mode setting point Hi―

Single pressure: 80% FS ±: +30% FS

Pa/kPaWindow mode setting point Lo―

Single pressure: 20% FS ±: -30% FS

Pa/kPa

P. 18

P. 19

P. 18

P. 19
Hysteresis mode―

HYS/WIN

Output 1 mode ﾞ
Output 1 on-delay time

N.C.

―

OFF/N.C./N.O.

0

Sec.

Output 1 off-delay time

0

Sec.

0 to 600 sec(Unit of 1 sec)

Output 1 power supply on-delay time

0

Min.

0 to 20 min (Unit of 1 min)Output 2 function

Hysteresis mode―

HYS/WIN

Output 2 mode

N.C.

―

OFF/N.C./N.O.

Output 2 on-delay time

0

Sec.

Output 2 off-delay time

0

Sec.

0 to 600 sec(Unit of 1 sec)

Output 2 power supply on-delay time

0

Min.

0 to 20 min (Unit of 1 min)

Display setting

OFF―

OFF/No.**/CUST

Display setting （number）

No.01

―

No.00～No.99

Display setting（character）

AAAA

―

Refer to character list

1.0

Sec.

P. 20
Comparison output 2

Sub setting

Comparison output 1

Output 1 function

Sub-screen display

Display filter

P. 21
0.2/1.0/2.0/5.0/10.0 sec

Detailed setting

Output filter

1.0

Sec.

Display low-cut

1

% FS

Output low-cut

1

% FS

Main screen display color

White

―

WHIT/RED

Low-power consumption

OFF―

OFF/ON/3MIN

Measurement display sign inversion

OFF―

OFF/ON

Analog output inversion

OFF―

0 to 5% FS (Unit of 1% FS)

Test mode―

Setting clear
Error display――

Pa/kPa――――*1: All the setting values are set to the factory default setting by the setting clear mode.
*2: Refer to the respective page for the description of each mode.

14

OFF/ONP. 22

Single pressure:-10 to 110% FS± : -60 to +60% FS
NO/YES―

P. 15

4. When an error occurs
If an error occurs in this instrument, the pressure display mode and the error display mode are switched alternately as
shown in Fig.4- (4). When this happens, check the error code.
[Coping procedure]
1) Since the error code is displayed in the lower two digits, record the numeric value. There may be multiple
errors occurring.
2) After recording the error code, turn off the power to this instrument.
3) Refer to the error code table below and take the appropriate action.

Fig.4-(4). Example of Error

Pressure display mode
(Current pressure: 3.8 Pa)

Ｐａ

Error display(Error code: 03)

Alternative
display every
secondＰａ* When multiple errors occur simultaneously, the numeric values of the error display switch sequentially.

Error Code Table
Error code

Cause

Display value

E. 01

Overcurrent occurs incomparison output 1

E. 02

Overcurrent occurs incomparison output 2

MeasureTurn off the power to this instrument, check the external
connection of comparison output 1, and check for incorrect
wiring or failure of connected devices.
Refer to *2.
Turn off the power to this instrument, check the external
connection of comparison output 2, and check for incorrect
wiring or failure of connected devices.
Refer to *2.

*1: Please contact us for the error displays “E. XX” other than the above. Let us know the error code and format,
pressure range, serial number, and situation.
*2: The overcurrent detection function does not completely protect this instrument. Depending on the condition of theexternal wiring, the instrument may fail.

15

V. Description of Modes
1. Pressure display mode
For the operating method of the pressure display mode, refer to “Fig.4-(2) Mode Switching (1)” on page 10.
1-1 Normal display
Pressure display is performed. When the pressure of the H side is higher than that of the L side, the pressure
display indicates a positive value.
1-2 Over range display
When a pressure exceeding the rated pressure range is applied, the display pressure becomes “HHHH” to report
the over range. When the differential pressure is negative, the display pressure becomes “LLLL”.
- Over range pressure
Single pressure range: 110% or higher and -10% or lower of the rated pressure range
Zero center (+ -) range: 60% or higher and -60% or lower of the rated pressure range※ When sign inversion is on; LLLL: pressure difference is positive, HHHH: pressure difference is negative
Refer to “5-8 Measurement display sign inversion” on page 22.
1-3 Display during sleep
When the setting value in “5-7 Low-power consumption” on page 22 is set to “3MIN”, the display goes to sleep
after 3 minutes and performs the display during sleep.

2. Quick setting mode
The following items can be executed from the pressure display mode by quick operation.
Quick operation

MODE

+

: Press and hold for 2 sec.

Zero adjustment+: Press and hold for 2 sec.

Setting value protection
Max. value display
Min. value display

2-1 Zero adjustment
With the current pressure display value as reference, zero adjustment of the display and analog output is performed
automatically. Zero adjustment is possible if the current pressure display value is within the range of -20% FS to 20%
FS. When zero adjustment is requested for a value outside the range, “EROR” is displayed on the sub-screen andthe operation is ignored.
Since zero adjustment processes internal data with higher accuracy than pressure display, it functions even if thepressure display is “0”. Also analog output zero point is automatically corrected at the same time.
[Operation procedure]
1) Open the pressure tubes on the H and L sides to the atmosphere so that no pressure is applied to this
instrument.
2) In the pressure display mode, press
andkeys simultaneously for 2 s or longer. “0000” isdisplayed on the main screen, and “ZERO” is displayed on the sub screen. The numbers and characters
flash twice to inform that zero adjustment is performed.
3) Reinstate the tubes to complete the procedure.

△！

Caution- When performing zero adjustment, warm up the instrument for more than 20 minutes after turningon the power.
- Perform zero adjustment in the correct installation position. Be sure to apply no pressure on boththe H and L sides (open to the atmosphere) or stop the machine to zero the residual pressure
before performing zero adjustment.
- Be sure to reinstate the tubes after completion of zero adjustment.

2-2 Setting value protection
When the setting value protection is turned ON, the setting value cannot be changed in each setting mode, andsetting mistakes due to erroneous operations can be prevented. If the setting value is changed while the protection
is ON, “LOCK” is displayed on the main screen, and the operation is ignored.

162-3 Max./min. value display
The max. and min. values of pressure measurement after power-on are displayed.
Key: Max. value display
Key: Min. value display
To clear the max. or min. value, press and holdorPress and holdfor 2 seconds or longer: Max. value clear

Press and holdfor 2 seconds or longer: Min. value clear

for 2 seconds or longer.

Note that the max./min. values are reset when the power supply of this instrument is cut off.
The max./min. values are always updated immediately after power-on of this instrument, but the min. value isinterlocked with “4-4 Power supply on-delay time” on page 20. Therefore, the min. value will be reset automaticallywhen the setting time has elapsed. When the “power supply on-delay times” of the two systems are different, themin. value is reset with the longer setting time.

△！

CautionNote that the maximum and minimum values will be reset when the power supply of the unit is cut
off.

17

3. Main setting mode
The pressure setting points of each system for comparison output can be set. For the setting method, refer to“3. Operation method” on page 11 and “Fig.4-(2) Mode Switching (1)” on page 12.
3-1 Pressure setting points (P1, P2)
When “4-1 Output function” on page 20 is set to the hysteresis mode, P1 acts as the setting point and P2 acts as
the hysteresis setting point.
When P1 > P2, the upper limit alarm operation with the normal region equal to or lower than P1 is performed.
Fig.5-(1). Comparison Function, Hysteresis Mode: Upper Limit Setting (P1 > P2)
Alarm
activation

Pressure

Alarmcancellation

P1-P2
Ｐ１
Ｐ２

Time

Pressure condition

NormalAbnormal

NormalPower supply on-delay timer
During timer operation, thecomparison output is open (OFF)
forcibly. (Refer to “4-4 Poweron-delay time” on page 20.)

Comparison output condition
Output mode

Operation explanation
Abnormal pressure rise isdetected to activate thecomparison output.
When “4-2 Output mode” onpage 20 is set to “N.C.”, theoutput is open (OFF) when theapplied pressure exceeds thesetting value P1 and the output
is closed (ON) when the pressure
falls below P2.

ＯＦＦ

Always open(OFF)Ｎ.Ｃ.

Closed(ON)Open(OFF)

Closed(ON)

Ｎ.Ｏ.

Open(OFF)

Closed(ON)Open(OFF)

When P1 < P2, the lower limit alarm operation with the normal region equal to or higher than P1 is performed.
Fig.5-(2). Comparison Function, Hysteresis Mode: Lower Limit Setting (P1 < P2)
Alarmactivation

Pressure

Alarmcancellation

Ｐ２
P2-P1
Ｐ１

Time

Pressure condition

NormalAbnormal

NormalComparison output condition
Output mode

ＯＦＦ

Always open(OFF)Ｎ.Ｃ.

Closed(ON)Open(OFF)

Closed(ON)

Ｎ.Ｏ.

Open(OFF)

Closed(ON)Open(OFF)18

Operation explanation
Abnormal pressure drop is
detected to activate thecomparison output.
When “4-2 Output mode” onpage 20 is set to “N.C.”, theoutput is open (OFF) when theapplied pressure falls below thesetting value P1 and the output
is closed (ON) when the pressure
exceeds P2.
Power supply on-delay timer
During timer operation, thecomparison output is open (OFF)
forcibly. (Refer to “4-4 Poweron-delay time” on page 20.)

3-2 Pressure setting points (Hi, Lo)
When “4-1 Output function” on page 20 is set to the window mode, Hi acts as the upper limit pressure setting pointand Lo acts as the lower limit pressure setting point. The comparison operation is performed for the region (window)
indicated by the setting points Hi and Lo. The hysteresis of each setting point is fixed 1% FS.
When Hi > Lo, the comparison operation with the normal region where Hi is the upper limit point and Lo is the lower
limit point is performed. The hysteresis point is 1% FS inside the region.
Fig.5-(3). Comparison Function, Window Mode: Inside Region (Hi > Lo)
Pressure

Alarmcancellation

Alarm
activation

Alarmcancellation

Alarm
activation

Hysteresis

Ｈｉ

1%FS

1%FS
Ｌｏ

Hysteresis

Time

Pressure condition

Abnormal

NormalAbnormal

NormalAbnormalComparison output conditionＯＦＦ
Output mode

Ｎ.Ｃ.

Operation explanation
The comparison operation is
performed for the range (window)of the set pressure region (Lo to
Hi).
When “4-2 Output mode” onpage 20 is set to “N.C.”, The
output is closed (ON) when theapplied pressure is within therange (window) and the output isopen (OFF) when the pressure isoutside the range.

Always open(OFF)
Open(OFF)

Closed(ON)Open(OFF)

Closed(ON)Open(OFF)

Ｎ.Ｏ. Closed(ON)Open(OFF)

Closed(ON)Open(OFF)

Closed(ON)Power supply on-delay timer
During timer operation, thecomparison output is open (OFF)
forcibly. (Refer to “4-4 Poweron-delay time” on page 20.)

When Hi < Lo, the comparison operation with the abnormal region where Lo is the upper limit point and Hi is thelower limit point is performed. The hysteresis point is 1% FS outside the region.
Fig.5-(4). Comparison Function, Window Mode: Outside Region (Hi < Lo)

Pressure

Alarm
Alarm
cancellation activation

Alarm
activation

Alarmcancellation

Hysteresis
1%FS
Ｌｏ

Hysteresis

Ｈｉ

1%FS

Time

Pressure condition

NormalAbnormal

NormalAbnormal

NormalComparison output conditionＯＦＦ
Output mode

Always open(OFF)

Ｎ.Ｃ. Closed(ON)
Ｎ.Ｏ.

Open(OFF)

Open(OFF)

Closed(ON)Open(OFF)

Closed(ON)Closed(ON)Open(OFF)

Closed(ON)Open(OFF)19

Operation explanation
The comparison operation is
performed for the range (window)of the set pressure region (Lo to
Hi).
When “4-2 Output mode” onpage 20 is set to “N.C.”, theoutput is open (OFF) when theapplied pressure is within therange (window) and the output isclosed (ON) when the pressure isoutside the range.
Power supply on-delay timer
During timer operation, thecomparison output is open (OFF)
forcibly. (Refer to “4-4 Poweron-delay time” on page 20.)

4. Sub setting mode
The functions of each system for comparison output can be set. For the setting method, refer to “3. Operation method”
on page 11 and “Fig.4-(2) Mode Switching (1)” on page 12.
4-1 Output function
The output function of the comparison output can be set. Select the output function from the following operation
modes.
Main screen display

Operation mode

Description of operation

HYS

Hysteresis mode

The function is activated by the comparison pressure setting points
P1 and P2. Set this mode when using them as the upper and lower
limit alarms.

WIN

Window mode

The function is activated by the comparison pressure setting points
Hi and Lo. It acts as a window comparator in the pressure region
indicated by the setting points Hi and Lo.

4-2 Output mode
The output mode of the comparison output can be set.
Main screen display

Output mode

Open collector output circuit

OFF

Always OFF

Always Open (OFF)N.C

Normal ON

Normal Close

N.O

Normal OFF

Normal Open

4-3 On-delay/off-delay time
When the on-delay/off-delay time is set, the operation of the comparison output transistor according to theinternal comparison result is delayed.
On-delay time: The time to delay ON (close) of the comparison output transistor
Off-delay time: The time to delay OFF (open) of the comparison output transistor
When the set delay time has elapsed with the internal comparison result (ON or OFF) retained, the comparison
output transistor is turned ON or OFF. Conversely, when the internal comparison result is not retained during thedelay time, the result becomes invalid.
The delay time is set regardless of the setting state of the output mode (N.C. or N.O.). When the delay is notnecessary, set the setting value to “0” (0 sec). Refer to Fig.5-(5).
4-4 Power supply on-delay time
When the power supply on-delay time is set, the comparison output transistor is turned OFF forcibly until the
specified time has elapsed with the delay timer that starts immediately after power-on of this instrument. By using
this function, it is possible to prevent the comparison output from operating so as not to perform abnormal output
until the specified pressure is reached from power-on.
Note that, when the normal operation is required immediately after power-on, set the setting value of the delay
timer to “0” (0 min.). Refer to Fig.5-(5).
Fig.5-(5). Comparison Output Delay (ON/OFF, Power Supply ON)
Power supply ON
Internal
comparison
resultOpen(OFF)

Close(ON)

Close(ON)Power supply ON-delay time
OFF-delay time
ON-delay time

Comparison
outputOpen(OFF)

Close(ON)ON-delay timeOpen(OFF)

20

Close(ON)Operation explanation
Regardless of the setting for “4-2Output mode” on page 20 (N.C. or
N.O.), the timing of closed/open(ON/OFF) of the output transistor isdelayed by the delay setting time.
Power supply on-delay timer
During timer operation, thecomparison output is open (OFF)
forcibly.

5. Detailed setting mode
Display and output can be set in detail. For the setting method, refer to “3. Operation method” on page 11 and“Fig.4-(3) Mode Switching (2)” on page 13.
5-1 Sub-screen display setting
Display contents of the sub-screen can be set while the measurement pressure is displayed. Numbers (No.00～
No.99) or any characters can be selected in the sub-screen. Refer to the following numbers, alphabets andcharacters which can be selected.
Character list

5-2 Display filter
The display filter performs moving average processing. When the fluctuation of the measurement pressure is large,
the fluctuation of the display value can be reduced by increasing the moving average time, but the response
becomes slow.
Main screen display

Moving average time

Number of moving average

0.2

High speed (0.2s)

10

1.0

Standard (1.0s)

50

2.0

Low speed 1 (2.0s)

100

5.0

Low speed 2 (5.0s)

250

10.0

Low speed 3 (10.0s)

500

5-3 Output filter
The output filter performs moving average processing. When the fluctuation of the measurement pressure is large,
the fluctuation of the output value can be reduced by increasing the moving average time, but the response becomesslow. The comparison outputs 1 and 2 and the analog output share the output filter.
Main screen display

Moving average time

Number of moving average

0.2

High speed (0.2s)

10

1.0

Standard (1.0s)

50

2.0

Low speed 1 (2.0s)

100

5.0

Low speed 2 (5.0s)

250

10.0

Low speed 3 (10.0s)

500

5-4 Display low-cut
When the pressure display value is equal to or less than the setting value, the display value is forcibly set to zero.
When the setting value is set to 2 (2% FS), the value less than ± 2% FS is displayed as zero. When this function is
not used, set the setting value to 0 (0% FS).
5-5 Output low-cut
When the analog output value is equal to or less than the setting value, the output value is forcibly set to zero.
When this function is not used, set the setting value to 0 (0% FS).

21

5-6 Main screen display color
The main screen display color during measurement pressure display can be selected. For the display other than themeasured pressure display, it is displayed in the reverse color.
Main screen display

Main screen display color

WHIT

White for measurement pressure display, red for others

RED

Red for measurement pressure display, white for others

5-7 Low-power consumption
The display brightness of the LCD can be changed to reduce power consumption. Other functions are not affected.
When the setting value is set to “ON”, the brightness of the LCD is reduced. When the setting value is set to“3MIN”, the LCD goes to sleep after 3 minutes.
5-8 Measurement display sign inversion
The signs of the display values of the pressure display and max./min. value displays are inverted to display thevalues. The comparison output, analog output, and other functions are not affected. This function is used to invert
the sign in negative pressure measurement. For the application of this function, refer to “4-1 Measurement
pressure and tube connection” on page 8.
5-9 Analog output inversion
Although the analog output value usually rises when the differential pressure under measurement rises, the reverse
action is realized by turning ON the analog output inversion function.
Main screen display

Analog output

OFF

Normal (When differential pressure rises: 4 → 20 mA)

ON

Inverted (When differential pressure rises: 20 → 4 mA)

5-10 Test mode
You can check whether the parameter setting is set correctly at the time of instrument installation or inspection.
The pressure set in this mode acts as the simulated applied pressure even if the pressure is not actually applied.
This function is used when checking the operation of the comparison output and analog output by changing thesimulated applied pressure.
Immediately after transition to test mode, the pressure value just before the transition is automatically set to thesimulated applied pressure. When the power supply of this product is cut off, the simulated setting pressure value is
not saved. Additionally, the display value of the simulated setting pressure flashes during the test mode.
[Operation in test mode]
Immediately after transition to the test mode, the measurement pressure value just before the transition is set tothe simulated pressure value and the instrument is in the immediate test mode. The immediate setting value
becomes valid by increasing or decreasing of the setting value using theorkey.
5-11 Setting value clear
The setting value of each mode can be restored to the factory default setting. However, note that it is cleared once,the content set in each mode cannot be restored. For the factory default setting, refer to the “Mode List” onpage 14.

22

VI. Periodic Calibration
Generally, in order to keep the life and reliability of an instrument for a long time, it is important not to stress the instrument
due to external factors. No special maintenance is required for this instrument when it is used properly according to this
instruction manual. However, we recommend periodic calibration once a year. For periodic calibration, please contact your
distributor or us.

VII. Product Warranty
Warranty Period
The warranty period shall be for one year from the date that the product has been delivered to the location specified by thepurchaser.

Warranty Scope
In the event of any failure or defect in the product or non-conformity of specifications due to the reasons solely attributable
to Yamamoto Electric Works, Yamamoto Electric Works shall remedy such malfunctioning or defective product at its own
cost in one of the following ways to be selected by Yamamoto Electric Works:ⅰ) repair such product, ⅱ) replace such product.
However, this Warranty shall not cover the damages or defects that arise due to any of the following reasons.
(1) Any failure resulting from improper conditions, improper environments, improper handling, or improper usage otherthan described in the instruction manual or the specifications arranged between the purchaser and Yamamoto ElectricWorks.
(2) Any failure resulting from factors other than a defect of our product, such as the purchaser’s equipment or the designof the purchaser’s software.
(3) Any failure resulting from modifications or repairs carried out by any person other than Yamamoto Electric Works’staff.
(4) Any failure caused by a factor that cannot be foreseen at a scientific/technical level at the time when the product has
been shipped from Yamamoto Electric Works.
(5) Any disaster such as fire, earthquake, and flood, or any other external factor, such as abnormal voltage, for which weare not liable.
Yamamoto Electric Works specifically disclaims all implied warranties of merchantability and/or fitness for a particular use
or purpose, as well as liability for incidental, special, indirect, consequential or other damages relating to the product.
*This product warranty is only valid within Japan.

Product Applicability
Our products are designed and manufactured as general-purpose products for general industries. Therefore, ourproducts are not intended for the applications below and are not applicable to them.
(1) Facilities where the product may greatly affect human life or property, such as nuclear power plants, aviation,
railroads, ships, motor vehicles, or medical equipment(2) Public utilities such as electricity, gas, or water services(3) Usage outdoors, under similar conditions or in similar environments
This document has been translated from the original Japanese version, and the original Japanese version takes first priority.
Be sure to refer to the original Japanese for the details of this warranty.

VIII. Service
Scope of service
Since the service fees such as dispatching engineer etc. are not included in the price of the product, we shall separately
charge the fees in the following cases.
1) Installation adjustment guidance and commissioning witnessing2) Maintenance/inspection, adjustment and repair
3) Technical guidance and technical education
4) Witness inspection of the product at our factory<Notice>
Please understand beforehand that the specifications and contents of the product described in this instruction manual may bechanged for improvements without notice.

23