4 TM20-TM25-EN-V1.3 1/13
Operation
Display Protective Foil
The meter’s display is shipped with a protective foil covering. Please remove carefully before use.
Powering the meter
Open the batte
ry compartment by loosening the two screws located on the back of the meter (on
either side of the magnet). Insert a new CR2032 3V lithium button battery and close the cover. If a
battery is already installed, remove the insulation strip so that the battery can make proper circuit
contact.
The instrument is now ready for use. Press the ON/OFF key once to power the meter. The meter’s
previous settings will be preserved.
Selecting
o
C/
o
F units of measure
Press the
o
C/
o
F key to select the desired temperature unit of measure.
MAX-MIN and HOLD Function
To freeze (hold) the displayed re
ading, press the MAX/MIN key. The current reading will be held on
the display and the HOLD display icon will be visible. Press MAX/MIN again to view the Maximum
reading captured since the last reset; the MAX indicator will be visible along with the MAX reading.
Press MAX-MIN again to view the Minimum (MIN) temperature reading; the MIN icon will be visible
along with the lowest reading captured since the last reset. To reset the MAX and MIN values press
and hold the MAX-MIN button for 3 seconds while the MAX or MIN icon is visible. To return to
normal operation press the MAX/MIN key again; the HOLD-MIN-MAX indicators should now be off.
Temperature Alarms
Set high/low
alarm limits and the meter w
ill audibly and visually alert the user if either limit is
exceeded. To set the alarm values, follow these steps:
1. Press the ALARM/SET button once from the normal operating mode; the upper limit value and
its symbol (up
arrow) will flash.
2. Set the temperature limit by pressing the ▲ button (press and hold for fast scrolling).
3. Now use the MAX/MIN button to activate/deactivate the alarm (alarm symbol will appear in the
upper right hand corner of the LCD when activated)
.
4. Verify the setting by pressing ALARM/SET.
5.
Perform the same steps for the low alarm limit.
After setting the alarms, the upper and lower limit symbols (▲▼) will be displayed on the LCD
indicating that an upper and a lower alert value has been set. If the measured temperature exceeds
either limit, the alarm beeper will sound for 1 minute. The alarm beeper icon and the corresponding
arrow will flash. Pressing any button will switch off the alarm.
When the temperature returns to the desired range the audible alarm will stop sounding. The arrow
will remain flashing however to show that the temperature was higher or lower than a set value at
least once in the past. Press the ▲ button to switch OFF the flashing arrow.
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