Single and dual input analyzers for pH/Redox (ORP)
AX416, AX436, AX460, AX466 & AX468 6Installation
IM/AX4PH Rev. P 55
6.6.2 Differential ph Systems Connections – Capable of Providing Sensor Diagnostics (AP200, TBX5)
When connecting one of these pH systems to the AX400 transmitter, ensure the differential input switch for the relevant sensor is
ON.
See Section 5.4, page 33 for sensor diagnostics configuration. If diagnostics are not required leave them switched off.
*In normal operation do not connect the heavy green wire. If noisy readings are obtained, connect the wire to the earth stud.
Ter min al B lo ck B Function AP200 *TBX5
Sensor B Sensor A Color Color
B1 B9
Temperature Compensator (if fitted) Common –
see also Note 1below
Grey White
B2 B10 Temperature Compensator (if fitted) 3
rd
Lead White Link to White
B3 B11 Temperature Compensator (if fitted) Green Red
B4 B12 Reference Blue Black
B5 B13 Not Used Not Used Not Used
B6 B14 Solution Earth (Ground Rod) Green/Yellow Green
B7 B15 Screen/Shield (if fitted) Red Yellow
B8 B16 Glass/Metal Electrode Clear Blue
Table 6.3 Differential ph Systems Connection – AP200, TBX5
Note.
1. If the sensor is fitted with a 2-wire PT100, Pt1000 or 3K Balco temperature compensator, link terminals B9 and B10 (and
B1 and B2 if dual input analyzer.).
2. Redox systems are not temperature compensated so do not have temperature sensors. To remove temperature error
messages, set Temperature Sensor to NONE. If a temperature sensor is used for a separate temperature display, set
Temperature Sensor to the correct type – see Section 5.3, page 30.
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