Wiring For Power To Detector Heater; Wiring For Detector Output - YOKOGAWA ZR22G User Manual

(1) Keep ground resistance to 100 Ω or less (equivalent JIS D style (Class 3)).
(2) When the ambient temperature of the wiring installation is 75 to 150°C for the wiring of the
detector, use wiring material with sufficient heat resistance.
(3) When connecting the ground wiring to the ground terminal of the converter case, be sure
that the lock washer is in contact with the case surface (see Figure 5.5.).
5.2.4

Wiring for Power to Detector Heater

This wiring provides electric power from the converter to the heater for heating the sensor in the
detector.
(1) Ambient temperature of the detector: 75°C or less
ZR22G
Detector
HTR 7
HTR 8
(2) Ambient temperature of the detector: exceeding 75°C
ZR22G
Detector
HTR 7
HTR 8
Figure 5.7
Cable Specifications
Basically, cables (2 cores) that withstand temperatures of at least 80°C are used for this wiring.
When the ambient temperature of the detector exceeds 75°C, install a terminal box, and connect
to the detector using six-piece 600 V silicon rubber insulated glass braided wires.
5.2.5

Wiring for Detector Output

This wiring enables the converter to receive cell output from the detector, output from a
thermocouple and a reference junction compensation signal. Install wires that allow for 10 Ω of
loop resistance or less. Keep detector wiring away from power wiring.
Heat-resistant wiring
Wiring for power to detector heater
<5. Wiring>
ZR802G
Converter
ZR802G
Converter
Terminal box
IM 11M12G01-02EN
5-7
HTR
HTR
1sh Edition : Mar. 25, 2021-00