Temperature Adjustment; Figure 7 Hx93Ac Calibration Procedure Temperature Adjustment - Omega Engineering RH/Temperature Transmitter HX93A User Manual

13
13. Calibration Procedure for HX93AC (all styles)

Temperature Adjustment

Recommended equipment:
• RTD Simulator OMEGA
• Handheld Digital Multi-meter, OMEGA
• Dc Power Supply, OMEGA
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.
8
HX93A, HX93DA SERIES
RH/Temperature Transmitter
CL-301
SENSOR HEAD
Figure 7 - HX93AC Calibration Procedure
® Model No.: CL510-1
® Model No.: PSU-93
P5
P4
J4
Temperature Adjustment
® Model No.: HHM29
HHM29
18.41 mA
COM V
10A uAmA
24V
+ –
PSU-93