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13. Calibration Procedure for HX93AC (all styles)
Temperature Adjustment
Recommended equipment:
• RTD Simulator OMEGA
®
Model No.: CL510-1
• Handheld Digital Multi-meter, OMEGA
®
Model No.: HHM29
• Dc Power Supply, OMEGA
®
Model No.: PSU-93
1. Remove enclosure cover
2. Connect the power supply and multimeter as shown in the figure
below.
3. Disconnect the 2-wire Connector “J4” from the main Board.
4. Connect the RTD simulator to the “J4” header on the main board as
shown below.
5. Apply power to transmitter and allow to warm up for 10 min.
6. Set the RTD simulator to the 0ºF position.
7. Adjust potentiometer “P5” on the main board for a output reading
of 4.43 mA @ 0°F
8. Set the RTD simulator to the 150ºF position.
9. Adjust potentiometer “P4” for a output reading of 18.46 mA 150°F
10. Repeat steps 6, 7, 8 and 9 as necessary until proper readings are
maintained.
11. Calibration complete.
Figure 7 - HX93AC Calibration Procedure
Temperature Adjustment
SENSOR HEAD
PSU-93
+
24V
–
18.41 mA
P4
TB1
1
3
2
TB2
P5
3
2
1
HHM29
J4
CL-301
uAmA
10A
COM
V
13
HX93A, HX93DA SERIES
RH/Temperature Transmitter