User manual

Note: The remote thermo-hygrometer will always display the un-calibrated humidity and is

unaffected by the calibrated humidity set from the display console.

4.2 Min/Max Mode

While in Normal Mode, press the MIN/MAX key to enter the minimum mode, and the MIN icon and

minimum records will be displayed at the bottom of the display. Press and hold the RESET key for

two seconds to reset the minimum values to the current values.

Press the MIN/MAX key to enter the maximum mode, and the MAX icon and maximum records will

be displayed. Press and hold the RESET key for two seconds or more to reset the maximum values to

the current values.

Press MIN/MAX key again to return the Normal Mode.

4.3 Multi-Channel Operation

The WS-0101 supports up to three WH2B remote thermo-hygrometers (one is included). The optional

sensors can be purchased at AmbientWeather.com.

4.3.1 Sensor Initialization

Power up the sensors and console in the following order:

1. Power up the console. Do not touch any of the buttons, as described in Section 2.4.

2. Power up the first remote thermo-hygrometer as described in Section 2.5. Wait until the

sensor reports into the console.

3. Power up the second remote thermo-hygrometer as described in Section 2.5. Wait until the

sensor reports to the console. The first sensor will be designated as Channel 1 and the second

sensor will be designated as Channel 2.

4. Power up the third remote thermo-hygrometer as described in Section 2.5. Wait until the

sensor reports to the console. The third sensor will be designated as Channel 3. The display

will switch between each sensor until you exit the initialization state by pressing any button.

4.3.2 Sensor Accuracy Note

Allow about one hour for all sensors to stabilize.

Verify the temperature values match closely with the console and sensor array in the same location

(about 10’ apart). The sensors should be within 4°F (the accuracy is ± 2°F).

Verify the humidity values match closely with the sensor array in the same location (about 10’ apart).

The sensors should be within 10% (the accuracy is ± 5%). Use the calibration procedure to remote

humidity inaccuracy.

4.3.3 Viewing the 3 Sensor Channels

To view the 3 sensor channels, select the CH/+ button. The minimum and maximum can be viewed

for each channel as specified in Section 4.2.

4.4 Humidity Calibration

Humidity measurement is among the more difficult problems in basic meteorology. Accuracy is

difficult to achieve and are subject to drift, so need regular recalibration.