Min-Max Recording - Extech Instruments RH210 User Manual

Measurements
Taking Relative Humidity /Dew Point and Air Temperature Measurements
1. Connect the electrode to the probe input socket located on the bottom of the meter.
2. Switch the meter ON by pressing the Power button.
3. The display will indicate Air temperature on the lower left (in small digit format) and
either %RH or Dew point temperature on the upper right.
4. Press the Function button to select either %RH or Dew Point Temperature.
5. Press the Hold button to freeze the current values on the display.
6. Press the REC button to access the MIN‐MAX Recording mode. See detailed information
in the MIN‐MAX Recording section.
7. Press and hold the Power button for 2 seconds to turn the meter OFF.
Data Hold
1. Press the HOLD button to freeze the displayed value.
2. The LCD will display HOLD along with the held reading.
3. Press the HOLD button again to release the data hold function. The HOLD display icon
will switch OFF.
MIN‐MAX Recording
When selected, the Data Recording function records the MIN (lowest) and MAX (highest)
readings:
1. Press the REC button once to start recording MIN and MAX readings. The REC indicator
will appear on the display.
2. Press REC again and REC MAX will display on the screen along with the maximum value.
3. Press REC again and the display will show REC MIN along with the minimum value.
4. To view the real time readings while continuing to track the MIN and MAX values, press
the HOLD button while either the REC MAX or REC MIN icons are visible; now only the
REC icon will be visible. The meter is now continuing to monitor the highest (MAX) and
lowest (MIN) readings but is displaying real time measurements. To view the MAX and
MIN values again use the REC button as described earlier.
5. To exit the Record mode and reset the MIN and MAX values, press and hold the REC
button for at least 2 seconds. The display will return to the normal operating mode and
the REC/MAX/MIN icons will all disappear.
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