<2. Wiring and Installation>
11
IM 12A01A02-12E 9th Edition : Mar. 23, 2018-00
Jumper
holder
2.3.2 ORP Measurement
The ORP measurement uses the same sensor input module as the pH measurement. It is not
uncommon to measure ORP as process variable and a pH Glass electrode as reference. This is
the case with rH measurement and with pH compensated ORP measurement.
Conventional ORP sensors are connected to the module as follows:
11 Temperature
12 Temperature
13 Reference
14 Solution ground
15 Metal (measure)
16 Shield
17 Shield
FLXA202/FLXA21
REFTC Liquid
Earth
ORP
For conventional ORP sensors, the jumpers are placed as illustrated:
16
15191713181412
11
PH
Input 1
Input 2
Metal sensor on Input 1.
Normal reference on Input 2.
pH Compensated ORP sensors are connected to the module as follows:
11 Temperature
12 Temperature
13 Glass
14 Solution ground
15 Metal
16 Shield
17 Shield
FLXA202/FLXA21
PHTC ORPLiquid
Earth
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