Omega manual Temperature/Humidity Sensors, WMS-16 Observation Screen

To set barometric pressure offset, for sea level, you must first obtain a reliable barometric pressure for your location. The barometric pressure range is 28.25 to 30.75. This can be found by contacting the nearest airport or weather service facility. Nominal barometric pressure is 29.6 inches of mercury.

Call up the main screen (Figure 4) on the display terminal by pressing “Esc” for main menu. Press “2” for Current Observations at the main menu. Then press “1” for observation display (Figure 4).

While watching the main screen, slowly turn the offset adjustment screw. Clockwise will decrease the pressure reading. You may have to turn the adjustment 3 to 10 revolutions before the display starts to change. Turn the pot slowly in single turn increments, then wait for the screen to update, every five seconds. If the value is moving away from the correct value obtained above, turn the screw in the opposite direction. Continue turning the screw

until the displayed value agrees with the value obtained from the airport or weather service.

Station: Omega WMS-16		01/26/2000 11:07:35
===============================================================
WIND SPEED:	3.9mph, peak windspeed 7.8mph during past 10 min.
DIRECTION:	WNW, 299deg, varying 48deg during past 10 min.
WINDCHILL:	+52F
CURRENT TEMPERATURE:	+51.6F, +0.2F change during past hour
TODAY'S HIGH/LOW:	+53F at 09:42, +39F at 07:12
DEW POINT:	+45F
AUX TEMPERATURE:	+0.0F, +0.0F change during past hour
SOLAR RADIATION:	0W/m^2
BAROMETER:	29.08in, +0.16in change during past 3 hours
TODAY'S HIGH/LOW:	29.08in at 10:54, +28.80in at 00:43
RELATIVE HUMIDITY:	78%, +4% change during past hour
PRECIPITATION:	Since Last Log:	0.00in
	Today:	0.00in
	This Month:	0.00in

(Press Esc for main menu)

Figure 4 WMS-16 Observation Screen

Temperature/Humidity Sensors

Wire the cable from the Temperature/Humidity sensor into the terminal strip on the WMS-16 module as shown in Figure 1.

Call up the main screen (Figure 3) on the display terminal by pressing “Esc” for main menu. Press “2” for Current Observations at the main menu. Then press “1” for observation display (Figure 4).

Obtain current values for temperature and humidity from the nearest airport or weather service facility, and see that the values shown on the main display agree approximately with them.

To simulate a change in temperature and humidity, lean close to the sensor (or to the solar shield) and breathe onto the sensor until you see a corresponding increase in the displayed temperature and humidity values.

WMS-16 Weather Station Operator’s Manual 6