Extech Instruments RH200W User Manual

USER MANUAL for MODEL RH200W
Wireless Hygro‐Thermometer
Thank you for selecting the Extech RH200W Wireless Hygro‐Thermometer with Self‐Calibration & Auto Night Light. This device is shipped fully tested
and calibrated and, with proper use, will provide years of reliable service. Please visit our website (www.extech.com) to check for the latest version of
this User Manual, Product Updates, and Customer Support.
DESCRIPTIONS
MAIN UNIT
1. Backlight key
In normal mode, short press for 5 seconds of backlighting. Pressing other keys will reset the 5‐second timer
2. OUT (CHANNEL) / + key
In calibration mode, short press to increase the value
In normal mode, short press to switch between INDOOR, Channel 1~8
In normal mode, long press to enter auto‐cycle (Channel 1~8 and INDOOR readings will alternately display at 4‐
second intervals and the icon will display). From auto‐cycle mode, short press to return to normal mode.
3. M (MODE) key
In calibration mode, short press for options.
In calibration mode, long press to clear data
4. MIN‐MAX / ‐ key
In calibration mode, short press to decrease value
In normal mode, short press to check maximum/minimum temperature and humidity records. Short press to
return to normal mode
With MAX or MIN displayed, long press to reset the displayed values
5. CAL key
In normal mode, long press to enter calibration mode
In calibration mode, long press to return to normal mode
6. Auto night‐light switch
Slide to ON position to activate night‐light (the light will automatically turn on in dark areas). The brightness is weaker than normal backlight. Slide to
OFF position to turn off the night‐light function
7. °C / °F key ‐ Short press to toggle temperature units °C/°F
8. SENSOR key
In normal mode, short press to activate the receiver for the current channel. The unit will receive
signals for 5 minutes
9. RESET key
Short press for a factory default reset. Perform a reset if the display freezes or the unit otherwise
malfunctions.
WIRELESS SENSOR
1. Transmission status LED (flashes when sensor is transmitting)
2. Wall mount
3. CHANNEL slide switch (assign sensor to Channel 1 ~ 8)
4. RESET key (short press to reset the sensor)
5. Battery compartment (2 x AA batteries)
OPERATION
POWERING THE WIRELESS SENSOR
1. Remove the battery door of the sensor
2. Insert 2 'AA' batteries, observing correct polarity
3. Close the battery door
Notes: Once a sensor is assigned a channel using the channel slide switch, you can only re‐assign a channel by removing the batteries or resetting the
unit. Avoid placing the sensor in direct sunlight or inclement weather.
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POWERING THE MAIN UNIT
1. Remove the battery door of the main unit
2. Install 4 'AA' batteries observing correct polarity; then use a paper clip to press the RESET key
3. Close the battery door
4. All LCD segments will switch on
Note: To avoid a pairing failure, power up the sensor first, and then press the RESET key on the main unit only.
INDOOR TEMPERATURE/RELATIVE HUMIDITY
1. Short press OUT until 'IN" is displayed. The unit is now displaying indoor temperature °C / °F and Relative Humidity %.
2. Short press °C / °F to switch between °C and °F
3. When the temperature is <‐40°F/°C or > 158°F (70°C), Lo or HI will be displayed respectively. The humidity display will show dashes:
When the humidity is < 1% or > 99%, Lo or HI will be displayed:
4.
7 8 9
COMFORT INDICATION
The comfort indication feature is an icon‐based system showing comfort level based on indoor air temperature and humidity ranging from Excessive
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Cold (left icon below) to Comfortable (center icon) to Excessive Heat (right icon).
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Note: Comfort indication can vary even when measuring the same temperature because of the strong effect humidity has on comfort. There is no comfort
indication when temperature is < 0°C (32°F) or > 60°C (140°F).
TEMPERATURE TRENDING ARROWS
The temperature trend indicator illustrates the temperature change over time. Arrows indicate rising (left icon shown below), steady (center icon), or
falling temperatures (right icon).
1 MAX/MIN RECORDING
View the MAX/MIN temperature and humidity readings since the last reset.
1. In normal mode, short press MIN‐MAX to show the current maximum temperature and humidity values (diagram on left below); press again to show
the minimum values (diagram in center); press again to exit the mode (the unit automatically exits the mode after approximately 5 seconds).
2. Perform a manual reset (clear MAX/MIN readings) by long pressing MIN‐MAX when the unit is displaying the MAX/MIN records (diagram on right).
RECEIVING WIRELESS SENSOR SIGNALS
1. In normal mode, short press SENSOR to start receiving data.
2. The signal icon
3. Receiving a wireless signal after a manual reset or when SENSOR is pressed will cause dashes to display in the readings area when waiting for signal.
4. For successful reception, the signal icon will appear as shown in the diagram below on right. The selected channel number appears in the box below
the icon.
1. In normal mode, short press OUT to switch the display between INDOOR and CHANNEL 1~8.
2. In normal mode, long press OUT to toggle auto‐cycle mode ON/OFF. Auto‐cycle alternately displays the channels at 4‐second intervals (the icon
will show when auto‐cycle is active). In auto‐cycle mode only the actively communicating channels will appear. Short press OUT to exit mode.
3. To check the signals from multiple wireless sensors, short press OUT repeatedly in normal mode.
will flash (diagram on left below) until reception occurs. After 5 minutes, the icon will disappear if reception fails (center diagram).