Thermo Fisher Scientific Alpha pH 600 RF (In the process of updating the brand guideline & product image) - Manual (Page 11)

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2.3 Connecting Peripherals
2.3.1 Connection Terminals
Remove Back Cover:
• Remove the screws from the four corners at the back of the pH
Transmitter.
• Remove the back cover. The connectors are exposed on the back
PCBA as shown in the Figure 1 below.
Connectors:
• J202 – 9V DC power
• J204 - pH electrode & Temperature probe connections (wiring has to
be done in the detachable connector:
1. Pin 1 : pH Sensor
2. Pin 2 : pH Reference
3. Pin 3 : No Connection
4. Pin 4 : No Connection
5. Temp I/P : Pt 100 Compensate
6. Temp Sens : Pt 100 Sense
7. Temp Gnd : Pt 100 GND
8. PMP : Potential Matching Pin
Figure 1: Outer Side of Back PCBA
J204
J202
Pin 1
Pin 2
Pin 3
Pin 4
Temp I/P
Temp Sens
Temp Gnd
PMP