WT sensor PCPH02 User manual
April 2023 1 www.wtsensor.com
PCPH02 Online pH/ORP controller
Features
■Circuit modular design
■Isolated transformer output and less
affected by interference
■pH /ORP measurement, temperature
measurement
■Manual configuration temperature
manual and automatic compensation
function
■High and low alarm function
■Buzzer switch function
■Return function without key operation
over a certain time
■Quick access to online calibration
■Large size segment code LCD screen
Notes:
1 Do not touch the diaphragm with hard
objects, which may cause damage to the
diaphragm.
2 Please read the Instruction Manual of the
product carefully before installation and check
the relevant information of the product.
3 Strictly follow the wiring method for wiring;
otherwise it may cause product damage or
other potential faults.
Product overview
PCPH02 meter is an instrument independently
developed by our company for online monitoring of pH/ORP
value and through the current analog output to the monitoring
room for record preservation. pH /ORP controller is widely
used in thermal power, chemical fertilizer, metallurgy,
environmental protection, Pharmaceutical, biochemical, food
and water industries and for solution pH or ORP Values and
temperatures are continuously monitored.The continuous
monitoring data can be recorded by remote transmission
through substation and output connection.
Notes:
1 Do not misuse documentation.
2 The information presented in this product sheet is for reference
only. Do not use this document as a product installation guide.
3 Complete installation, operation, and maintenance
information is provided in the instructions of the product.
4 Misuse of the product may cause danger or personal injury.
April 2023 2 www.wtsensor.com
Performance parameters
Display
2.8 inch segment code LCD screen
Dimension
96mm×96mm×112mm
Cutout dimension
92mm×92mm
Measurement variables
pH/ORP
Measuring range
pH：0.00~14.00pH
ORP：-1000~+1000mV
-2000~+2000mV (customizable)
Accuracy
pH：±0.02pH；ORP：±1mV
Input impedance
≥1012Ω
Temperature
compensation
NTC10K: -10~60℃±0.3℃, 60 ~ 130 ℃
2℃
Range: -10~130℃manual/automatic
Current output
Isolation type, 4~20mA can be set corresponding pH/ORP and temperature
measurement range, maximum load 750 Ω, output accuracy + / - 0.2% FS.
Alarm function
2 channels, capacity AC250V/3A
Relative humidity
10~85%RH (no condensation)
Operating temperature
0~60℃
Power supply
AC：220VAC±10%，50/60Hz；DC：24VDC
Consumption
≤5W
Storage condition
Temperature: - 10 ~ 60 ℃
Relative humidity: 5~85%RH (no condensation)
Altitude: <2000m
Display
pH monitor：
ORP monitor：
April 2023 5 www.wtsensor.com
MUNU
Enter the menu under "Monitoring Interface"
Exit menu under "Menu interface"
EXIT
View related alarm status under "Monitoring Interface"
Return to the upper layer between the relevant upper
and lower layers of the interface under the "menu
interface"
"Calibration interface" means to skip this calibration item
RIGHT
Circularly select the digit of the parameter and switch
the monitoring interface
DOWN
Select the relevant menu under the "menu interface",
and modify the relevant values in the configuration state
ENTER
Press and hold under "Monitoring Interface" to enter the
mode of holding the current measured value output
In hold/fixed output mode, short press to return to
"monitoring interface"
Enter the submenu under "Menu interface" or confirm
the modification
Key combination
Long press to enter the "Temperature Compensation"
interface
Key combination
Long press to enter the "Online Calibration" interface
Key combination
Long press to enter the "Alarm Settings" interface
Wiring
April 2023 6 www.wtsensor.com
Identification of terminal:
REF: Reference terminal of the electrode
INPUT: Measuring terminal of the electrode
TEMPA: Temperature Compensation Terminal A
TEMPB: Temperature Compensation Terminal B
NC: Unidentified
4-20mA (+): 4-20mA output end+
4-20mA (-): 4-20mA output end-
AC220V (L): AC220V Fire Wire
AC220V (N): AC220V zero line
LO(AL): low alarm normally open relay
HI(AH): High alarm normally open relay
DC24V+: 24VDC +
DC24V-: 24VDC -
pH calibration
A pH calibration is the procedure of adjusting the pH meter by measuring solutions of known pH
values.
Why you need to calibrate:
The characteristic of a pH electrode will
change with time due to electrode coating
and aging. And even a pH electrode would
be stable over time, pH electrodes cannot
be produced with identical characteristics.
In practice the response of a real pH sensor
does not exactly follow the Nernst equation.
This difference between the theoretical and
actual behavior of a pH electrode must be
compensated for. A calibration is required to
match the pH meter to the current
characteristics of the used pH
sensor.
April 2023 7 www.wtsensor.com
Multi-point calibration
To achieve the best possible accuracy, the calibration should cover the range of the desired
measurement values. If the readings go beyond the calibrated range, the pH meter assumes linearity
and simply extrapolates the value to be displayed. The true value may be slightly different.
More advanced pH meters will let the user calibrate at three, four or five and even higher numbers of
pH values. A multi-point calibration mean, in comparison to a two-point calibration, that you can
calibrate your pH tester on both sides of the zero point (pH 7.00). This will expand your pH
measurement range without the need of re-calibrating.
.
April 2023 8 www.wtsensor.com
How to order
PCPH02 - RT1 - O1 - D1 - A2 - V1
Example: PCPH02 RT1 O1 D1 A2 V1
Product model:PCPH02. RT1: Range(0~14),pH(-1000~1000)mV. O1:Transmit output 4-20mA .
D1:RS485. A2: Relay output 2 relay output. V1: Power supply 24VDC.
Wotian reserves the right to make any change in this publication without notice. The information
provided is believed to be accurate and reliable as of this product sheet.
Contact us
Nanjing Wotian Technology Co.,Ltd.
Website: www.wtsensor.com
Add: 5 Wenying Road, Binjiang Development Zone, Nanjing, 211161, China
E-mail：dr@wtsensor.com
Product model
PCPH02
Range
RT1:(0~14)pH，
(-1000~1000)mV
RT2:(0~14)pH，
(-2000~2000)mV
Communication
D1: RS485
Relay output
A2:2 relay output
Power supply
V1: 24VDC
V2: 220VAC
Transmit output
O1 :4-20mA
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