Extech Instruments RH200W User Manual page 2

TEMPERATURE AND HUMIDITY TRENDING ARROWS
The temperature and humidity trend indicator illustrates the temperature and
humidity change over time. Arrows indicate rising (left icon shown below),
steady (center icon), or falling temperatures (right icon).
Arrow
indicator
Trend Rising
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 will flash (diagram on left below) until reception occurs.
After 5 minutes, the icon will disappear if reception fails (center diagram).
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.
5. In normal mode, short press OUT to switch the display between INDOOR
and CHANNEL 1~8.
6. 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.
7. To check the signals from multiple wireless sensors, short press OUT
repeatedly in normal mode.
Indoor
8. If the signal for Channel 1~8 is lost and does not recover within 1 hour, the
signal icon will disappear. The temperature and humidity will display "Er"
for the corresponding channel.
9. If the signal does not recover within 48 hours, replace the batteries of the
"Er" channel's sensor and then press SENSOR on the main unit to pair
with the sensors for each "Er" channel again.
Note To initiate reception after installing new batteries in the wireless sensor,
press SENSOR; otherwise, the main unit will fail to receive the sensor's signal.
Steady
Channel 1 Channel 5
LOW TEMPERATURE ICON
When the outdoor temperature is 37.4°F (3.0°C) or below, the low temperature
icon 'LO' flashes on the display.
LOW BATTERY CONDITION
If the main unit or the sensor batteries are low, the low battery icon
display. The icon will only appear when the corresponding channel is displayed.
Falling
For example, if the CHANNEL 1 sensor battery is low, the icon will show only
when CHANNEL 1 is displayed. Replace the batteries by following instructions in
sections Powering the Wireless Sensor and Powering the Main Unit.
TEMPERATURE/HUMIDITY CALIBRATION
1. In normal mode, long press the CAL key to enter the calibration mode. The
current outdoor channel or "IN" (indoor) icon will flash. Short press OUT to
choose Indoor (IN) or a Channel number 1~8.
2. Short press M (MODE) to step through the temperature calibration,
humidity calibration, and channel selection modes.
3. In temperature calibration mode, use the [ + ] [ - ] keys to adjust the value
in 0.1° steps. Long press to scroll quickly.
4. In humidity calibration mode, use the [ + ] [ - ] keys to adjust the displayed
value in 1% steps. Long press to scroll quickly.
5. Long press M at the temperature or humidity calibration screens to revert
to the previous calibration value for the selected channel.
6. To exit calibration mode, long press CAL or wait 60 seconds for the unit to
exit and return to the normal mode automatically.
7. If the reading for the selected channel is showing either dashes (flashing) or
the HI/Lo indicators, adjustment will not be possible; return unit for service.
Note: Comfort indication is a calculation based on calibrated temperature and
humidity measurements.
IMPORTANT NOTES
Attention! Please dispose of batteries and unit in an ecologically safe manner.
Always place the unit away from interfering sources such as monitors,
computers, appliances, and other devices. Avoid placing the unit on, or next to,
metal plates or surfaces
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