3
MIN/MAX
Press the MIN/MAX button; MIN appears on display. The LCD
screen is now showing the minimum humidity and temperature
readings in memory. Press the MIN/MAX button again; MAX will
show on the LCD screen. Press MIN/MAX button once again to
return to the current measurement.
To clear the MIN and MAX readings from memory, press and hold
the RESET button. The meter reading returns to the normal mode
and data in memory has been cleared.
Dew Point and Web Bulb Temperatures (3402 only)
When the meter is in AIR temperature mode, press the MODE
button to switch between “AIR”, “DP” (dew point), and “WB” (wet
bulb) readings.
Auto Power Off
The meter will turn itself off after 20 min. To override the Auto
Power Off function, press the ON/OFF and HOLD keys
simultaneously before powering on. The display will show "n".
Release the ON/OFF button. The meter will now stay on until ON/
OFF is pressed to turn it off.
Battery Replacement
Turn off the meter , then use a coin to open the battery cover. Put
the battery (CR2032) into the battery compartment with the “+” side
out. Place the battery cover back and lock it with a coin.
Troubleshooting
Power on, but no display
Be sure to press ON/OFF for at least 1/3 second.
Ensure the battery is in place with correct polarity and good contact.
Replace with a new battery and try again.
Remove the battery. Press “ON/OFF” for 10 seconds. Reinstall the
battery and try again
Display Disappears
Remember the meter turns itself off after 20 seconds of inactivity.
If the low battery indicator is on before the display turns off, replace
the battery.
Error Codes
E02 Ambient temperature below limit. Put the meter in room temp.
for 30 minutes. If E02 recurs, repair is required.
E03 Ambient temperature above limit. Follow E02 steps.
E04 RH code appearing with E02 or E03. Follow E02 steps.
E11 RH sensor must be recalibrated.
E33 Humidity sensor damaged; repair is required.