Eppendorf New Brunswick -86 °C Freezers G - Manual (Page 26)

HEF® and G -86 °C Freezers — Operating manual
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The freezer is delivered unlocked. To change the code, the freezer must be unlocked. If a lock
code has already been set (indicated by the LOCK lamp flashing when the LOCK key is
pressed), that same code must be entered to unlock the freezer. When the freezer is unlocked,
the LOCK lamp is on (not flashing).
Once the freezer is unlocked, follow these steps to set a new lock code:
1. Press the CODE CHANGE key.
The lamp will flash and the display will go blank.
2. Using the numerical keys, enter the new four-digit number. Check it on the display.
3. Press the C key to cancel the entry if the display shows it to be incorrect, then enter the
correct number.
4. When the number is correct, record the new number somewhere secure. Then press the E
(Enter) key.
The CODE CHANGE indicator will turn off.
5. Press the LOCK key.
Its indicator lamp will turn off.
The freezer now has a new lock code. If at any time you wish to change this code, you will have
to enter this code to unlock the system before you can enter a new code.
Setting the lock code to 0000 disables the lock completely. With the 0000 code, you would need
only press the LOCK key to reprogram the freezer.
6.2.7 Setting the temperature offset
The temperature offset function enables to add a temperature offset to the factory defined
temperature settings.
1. Press the LOCK Key.
2. Press the C key to access the offset function.
3. Press 0, 1, 2, 3, or 4 key to set the offset in degrees.
4. Press the ENTER key to confirm selection.
6.3 Battery backup switch
This is a rocker switch labeled I/O behind the locked front panel. In the O position, the battery is
disconnected. This position should only be used while in transit, in storage, or to change the
battery.
At all other times the switch should be kept in the I position for the battery to be charged, and for
the alarm function to be available in the event of mains/power failure. (Failure to set the switch
may result in impaired battery life, and the alarm will not trigger if the mains/power fails.)
With the battery switch on, during a mains/power failure, the internal freezer temperature will be
displayed at ten-second intervals, and the audio alarm will also sound. The audible alarm may be
muted by pressing the ALARM TEST/MUTE key on the control panel, but will sound again after
30 minutes if the fault has not been corrected. Pressing the same button again will mute the
alarm for an additional 30 minutes; the pattern will continue to repeat until the initial problem is
corrected.
6.4 Alarm monitoring socket
The freezers are provided with an alarm monitoring socket at the rear of the freezer and a
matching plug for external monitoring. This plug can be connected either to a central monitoring
system such as a building management system, or to a remote alarm via an auto-dialer.
Hint!
Set temperature offset to "0" for no offset.
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Op
eration