Thermo Fisher Scientific EcoScan Temp 4/5/6 User Manual
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4.4 Releasing a Held Reading
Press HOLD key again to deactivate HOLD function or to release your frozen 
reading. The meter returns to measurement mode, and the “HO” annunciator 
disappears from the LCD. 
4.5 Maximum and Minimum Hold Mode
With the Maximum and Minimum Hold Mode, the EcoScan Temp meter can be 
used as a maximum registering (or minimum registering) thermometer. The 
meter displays the lowest or highest temperature measured since entering the 
Maximum or Minimum Hold mode. 
1. Power on the meter. The meter automatically enters Temperature mode.
Use
o
C/
o
F key to switch between Celsius and Fahrenheit reading if desired.
2. Press
HOLD key. The reading freezes and the annunciator “HO” displays in
the LCD.
3. Press
MAX/S or MIN/T key. Meter enters the Maximum or Minimum Hold
mode. “HO” and “MAX” or “MIN” annunciator displays in the LCD.
.
°C
HO MAX
Meter will now continuously display the lowest or highest temperature measured 
since you entered this mode. It will update the display when new highs or lows 
are reached. 
Press HOLD key again to leave MIN/MAX Hold mode and meter returns to its 
measurement mode.