Omega Speaker Systems HX93A manual 15A. Display Scaling for HX93DAC all styles

HX93A, HX93DA SERIES	15A
RH/Temperature Transmitter

15A. Display Scaling for HX93DAC (all styles)

Your HX93DA transmitter comes with dual built-in LCD indicators for displaying both Humidity and Temperature. Before the meter adjustment or re-scaling can be done the transmitters current output should be checked as per the calibration procedure in Section 12 and 13 to verify the display will be adjusted correctly and match the analog output.

Relative Humidity Display Scaling

Recommended equipment:

•Humidity Calibration Kit, OMEGA® Model No.: HX92-CAL

•Handheld Digital Multi-meter, OMEGA® Model No.: HHM29

•Dc Power Supply, OMEGA® Model No.: PSU-93

1.Remove enclosure cover

2.Connect transmitter as shown in figure 6.

3.Apply power to transmitter and allow to warm up for 15 min.

4.Place unit in a 11% RH environment and allow to stabilize for 15 min.

5.Adjust potentiometer "ZERO" on the back of the RH display for a reading of 11.0%

6.Place unit in a 75% RH environment and allow to stabilize for 15 min.

7.Adjust potentiometer "GAIN" on the back of the RH display for a reading of 75.0%

8.Repeat steps 4, 5, 6, and 7 as necessary until proper readings are maintained.

9.Re-scaling complete.

TRANSMITTER LID REAR VIEW

ZERO POTENTIOMETER	Z			RELATIVE HUMIDITY
	G
GAIN POTENTIOMETER		+	–	INDICATOR
ZERO POTENTIOMETER	Z			TEMPERATURE
GAIN POTENTIOMETER	G	+	–	INDICATOR

Figure 10 - Transmitter Lid Rear View

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