Min/Max Temperature Logging; Probe Calibration; Method 1 - Follett FZR20-LB Installation, Operation And Service Manual

Min/max temperature logging

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).
2. Use to scroll and highlight Min/Max Temperatures and press
Enter to select (Fig. 35).
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

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).
16 Operation
Fig. 34
- 3 0 . 0 C
B o t t o m Te m p - 3 0 . 0 C
M e n u
Fig. 35
A l a r m S e t t i n g s - 3 0 . 0 C
D i s p l a y S e t t i n g s
M i n / M a x Te m p e r a t u r e s
B a t t - 8 . 4 V O K
B a c k E n t e r
Fig. 36
M i n = - 3 1 . 9 C - 3 0 . 0 C
2 0 0 9 1 0 / 1 9 1 2 : 1 0
P r e s s E n t e r t o R e s e t
B a c k E n t e r
Fig. 37
- 3 0 . 0 C
B o t t o m Te m p - 3 0 . 0 C
M e n u
00981795R03 – FZR20/25 LB, PL