Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Instrukcja Użytkownika Pobierz pdf (Strona 6)

<1. Wiring and Installation>

IM 12A01A02-12E 4th Edition : Sep. 3, 2013-00

1.3.2 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.

Standard reference electrodes and an ORP/REDOX electrode are low impedance sensor inputs

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

FLXA21

REFTC Liquid

Earth

ORP

For conventional ORP sensors, the jumpers are placed as illustrated:

15191713181412

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

FLXA21

PHTC ORPLiquid

Earth

For pH Compensated ORP sensors, the jumper is placed as illustrated:

15191713181412

Input 1

Input 2

Metal sensor on Input 1.

pH glass (as reference) on Input 2.

1 2 3 4 5 6 7 8 9 10 11 ... 18 19

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Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Instrukcja Użytkownika Strona 6