Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 88)

IM 11M12A01-03E 5-16
5.9 Temperature Input Wiring
When inputting the measurement gas temperature from external of the equipment,
connect a two-wire temperature transmitter. The relative humidity and dew point are
acquired based on the temperature signal from the connected transmitter, in the case
where the setting is “Temperature input selected” and “external input”. As for the wiring
of the temperature transmitter and thermocouples, refer to appropriate temperature
transmitter instruction manual.
AI ϩ
AI Ϫ
FG
Shielded cables
ϩ
Ϫ
Converter
Temperature transmitter
F5.15E.EPS
5.9.1 Applicable Temperature Transmitter
Apply a temperature transmitter that is suit for the following interfaces:
Output signal: 4 to 20 mA DC, two-wire system
Maximum supply voltage from the analyzer: 24 V DC
Input resistance of the analyzer: Maximum 250
⍀ (The load resistance of the
transmitter is the total of wiring resistance and input
resistance.)
Temperature Transmitter Burnout
When outputting a burnout signal of the temperature transmitter with a contact output of
the analyzer, use “high-limit temperature alarm”. (Refer to Section 8.4, “Contact Output
Setting.”) In this case, set the burnout signal of the temperature transmitter to exceed the
high limit (20 mA or more).
5.9.2 Cable Specifications
Use a two-core shielded cable for wiring.
5.9.3 Wiring Procedure
(1) M4 screws are used for the converter terminals. Cables should be equipped with
appropriate crimp contacts. Ensure that the cable shield be connected to the FG
terminal of the converter.
(2) Be sure to connect “+” and “-” polarities correctly.