vwr.com I Instruction manual VWR
®
ULT Freezer 352/528 Eco Premium 02/2022
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14. Tolerance range and alarm delay settings
In this menu you can define the deviation between the actual value and setpoint of, which that shall cause
a tolerance range alarm. The entered value defines the limit of permitted deviations from the set-point
(exceeding and falling below). Reaching this limit triggers tolerance range alarm.
In addition, you can specify delay times for the tolerance range alarm and the door open alarm.
During the delay time there is no alarm message after leaving the tolerance range:
•
After door opening: fixed delay time of 1 hour
•
After turning on the chamber or returning power supply: fixed delay time of 12 hours
•
After leaving the tolerance range in normal operation: adjustable delay time (chap. 14.2)
If the actual value is outside the tolerance range, after the configured alarm delay time the alarm message
“Temperature range” is displayed in Normal display (chap. 15.1). If the alarm buzzer is activated (chap.
15.3) there is an audible alert.
This function only activates after the set-point has been reached once.
Required access level: “Admin”.
14.1 Setting the delay time for door open alarm
Path:
Normal display Settings Various Door alarm delay (min)
Press the
OK button
to enable the setting.
Setting the door alarm delay.
The current setting flashes. Use the
arrow buttons
to enter the desired
time after which the door open alarm shall be triggered. Entry range: 1
up to 600 minutes. Factory setting: 1 minute.
Confirm the entry with the
OK button
.
Door alarm delay (min)
With the
arrow-down button
you can now change to the tolerance range alarm delay setting.
With the
Back button
you can go back to the “
Various
” submenu and, repeatedly pressing it, to
Normal
display
.
14.2 Setting the delay time for tolerance range alarm
Following opening the door or chamber startup, the tolerance range alarm becomes valid only after the
setpoint has been reached.
Path:
Normal display Settings Various Range alarm delay (min)
Press the
OK button
to enable the setting.
Setting the tolerance range alarm delay.
The current setting flashes Use the
arrow buttons
to enter the desired
time after which the range alarm shall be triggered. Entry range: 1 up
to 300 minutes. Factory setting: 60 minutes.
Confirm the entry with the
OK button
.
Range alarm delay (mi
With the
arrow-up button
you can go back to the door alarm delay setting.
With the
arrow-down button
you can now change to the temperature tolerance range setting.
With the
Back button
you can go back to the “
Various
” submenu and, repeatedly pressing it, to
Normal
display
.