vwr.com I Instruction manual VWR
®
ULT Freezer 352/528 Eco Premium 02/2022
Page 44/86
Example:
Desired temperature value: -86 °C, desired safety controller value: -60 °C.
Possible settings for this example:
Temperature set point
Safety controller mode
Safety controller value
-86 °C
Limit
Limit value -60 °C
Offset
Offset value 30 °C
12.1 Setting the safety controller mode
Required access level: “User”.
Path:
Normal display Setpoints Safety controller Mode
Press the
OK button
to enable the setting.
Setting the safety controller mode
The current setting flashes. Use the
arrow buttons
to select between
LIMI (Limit) and OFFS (Offset).
Confirm the setting with the
OK button
.
Mode
With the
arrow-down button
you proceed to setting the safety controller value (chap. 12.2)
With the
Back button
you can go back to the “
Safety controller
” submenu and, repeatedly pressing it, to
Normal display
.
12.2 Setting the safety controller value
Required access level: “User”.
The desired safety controller mode must be selected first (chap. 12.1). Depending on the mode setting, one
of the following setting menus will appear.
Path:
Normal display Setpoints Safety controller Limit
or
Offset
Press the
OK button
to enable the setting.
Setting the safety controller value with “Limit” safety controller mode.
The current value flashes. Enter the desired limit value with the
arrow
buttons
. Setting range: -20 °C to -110 °C.
Confirm the entry with the
OK button
.
Limit
Or
Setting the safety controller value with “Offset” safety controller mode
The current value flashes. Enter the desired offset value with the
ar-
row buttons
.
Confirm the entry with the
OK button
.
Offset
With the
Back button
you can go back to the “
Safety controller
” submenu and, repeatedly pressing it, to
Normal display
.
