16 Operation
00981795R03 – FZR20/25 LB, PL
Min/max temperature logging
Fig. 34
The controller retains maximum and minimum temperatures since last reset
and provides a date and time stamp of when they occurred.
1. Press Menu button (Fig. 34).
Fig. 35
2. Use
to scroll and highlight
Min/Max Temperatures and press
Enter to select (Fig. 35).
Fig. 36
3. Use
to select the min or max logged temperature (Fig. 36). Press
Enter to reset log.
4. Press Back until the main temperature display screen is displayed.
Probe calibration
Fig. 37
Follett freezer probes are calibrated to a known standard prior to leaving the
factory. Recalibration can be easily accomplished at any time, if desired:
Method 1
1. Using a separate temperature sensor and readout with an accuracy
better than ±0.3 C (0.5 F) at -30 C (-22 F) (a NIST traceable calibrated
probe and readout is preferred), place probe in same solution as RTDI
top product probe.
2. Close door.
3. Press Menu button (Fig. 37).
Menu
-30.0C
Bottom Temp -30.0C
Alarm Settings
Display Settings
Min/Max Temperatures
Batt - 8.4V OK
-30.0C
Back Enter
Min = -31.9C
2009 10/19 12:10
Press Enter to Reset
-30.0C
Back Enter
Menu
-30.0C
Bottom Temp -30.0C
