Hach-Lange SI792 P, SI792x P, SI792x P-FF, SI792x P-PA User Manual - Manual (Page 30)

Installation
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3.5.3.3 Differential pH/ORP sensor wiring
Use Figure 8 and Table 5 on page 29 to wire the sensor to
the transmitter. The pHD sensor has 7 wires (2 shield wires). The LCP
sensor has 6 wires (1 shield wire).
Table 4 Terminal assignments—sensors with solution ground
Terminal No. Assignment
1 Measure electrode
4 Reference electrode
5 Solution ground
7 RTD (resistive temperature device)
8 RTD (resistive temperature device)
Figure 8 Wiring for differential pH/ORP sensors (PDXXX/RDXXX)
1 Wiring terminals—see Table 5 on page 29