DPTH High Accuracy Differential Pressure Transmitter-Operation Manual
Edition: A/2
3
Initial zero reset: when initial power on, it should be zero reset after fully warm-up and stable, to meet the specified accuracy.
Long term zero drift & reset: It may have long term zero drift after continuous working; customers can reset it periodically.
Re-calibration & zero reset: when re-calibration needed, zero reset should be done first. A qualified standard manometer is
needed for re-calibration operation. Please follow the operation procedures below.
Attention
It should be power OFF during installing and wiring. When using 24VAC, it is strongly recommended to power the unit with
independent transformer. If sharing a 24VAC transformer with other equipments such as controllers, transmitters or actuators,
please make sure the terminals 24V and GND are connected correctly. Otherwise, it may reduce serious damages.
Warranty
● It has limited warranty for eighteen (18) months after the production date.
● It does not extend to any unit that has been subjected to misuse or accident.
● It is, in any event, strictly limited to the replacement or repair of the product itself.
DPTH High Accuracy Differential Pressure Transmitter - Operation Instruction
(need LCD to apply)
Button definition:
“SET”: Set/Confirm/Save; “SEL”: Bit Select/Decrease/ Zero Reset
（
press for 5s
）
; “ADJ”: Adjust/Increase;
Zero reset: keep the high
（
+
）
/low
（
-
）
pressure ports unconnected in stable air, or directly connect the two, press the button “SEL”
5s to reset the actual “zero point”. It means “remove the zero drift of the transmitter in order to improve the accuracy”. It is
recommended that this operation could be done periodically.
Operation instruction:
1."P810": Reset
SET→SEL/ADJ→P810→SET
User can restore the factory default set. Input “P810”, “Pret” will blink, press button SET, all factory default set will restore.
2. "P075": Set the response time (Default set: 0.5s, available range: 0.5-30.0s)
SET→SEL/ADJ→P075→SET→SEL/ADJ→XXX→SET. (XXX means set time).
3. "P083": Check LED display function, it will display the 4 digits one by one.
SET→SEL/ADJ→P083→SET
4."P081": Set Engineering Unit (Default set: 1, for engineering unit Pa, available ranges: 1-5)
SET→SEL/ADJ→P081→SET→SEL/ADJ→XXX→SET (XXX means the code of engineering unit),then the relevant LED on.
(Index: 1: Pa; 2: kPa; 3: mbar; 4: mmW.C.; 5: inW.C.)
5."P485": Set RS485 address(Default
set
: 1, available ranges 1~255, but recommend 1~32)
SET→SEL/ADJ→P485→SET→SEL/ADJ→XXX→SET (XXX means RS485 address)
Note
：
Refer to the communication data table
6."P483": Set RS485 Baud Rate (Default
set
: 9600, available 9600 or 4800)
SET→SEL/ADJ→P483→SET→SEL/ADJ→XXX→SET (XXX means Baud Rate index)
Index
：
1: 9600; 2: 4800.
7."P482": Set RS485 Parity Bit (Default
set
: 0, available 0,1 or 2)
SET→SEL/ADJ→P482→SET→SEL/ADJ→XXX→SET (XXX means Parity Bit index)
Index
：
0: none; 1: odd
;
2: Even.
System Error signal:
Err 1
Keys input operation code is wrong
Err 2
Input data is not available
Err 3
Modbusattempt to write read only register error
Err 4
Modbus CRC check error
Err 6
Password Key input error
Shenzhen TEREN Control Technology Co. Ltd.
Add: 3F, 2nd Industrial Zone, Nankeng, Longgang
District, Shenzhen,Guangdong,P.R.CHINA
Tel: 0755-23935155 Fax: 0755-23935156
web: www.teren.com.cn
TEREN website
Alibaba shop
