Temperature Alarms - Gram COMPACT 220 Serie Bedienungsanleitung

Adjusting the difference between temperature set point and hAL / LAL alarm settings to
narrow, will result in unintended alarms. A narrow gab combined with a too short dAh could
result in an AH alarm, just by opening the door.
dAh should never be adjusted to less than 30 minutes.
To access the temperature alarm parameters, push and hold
5 seconds. The display will flash the first temperature alarm parameter hAL.
To access the individual parameters push
To move between and adjust the parameters use
Push to store the new setting. The controller automatically jumps to the next parameter.
Adjustable parameters are:
hAL High Alarm Limit
LAL Low Alarm Limit
dAh Time delay Alarm high
dAL Time delay Alarm Low
Atd Alarm temperature differential
The above parameter settings will result in the following:
To trigger a high temperature alarm (Ah) the cabinet temperature must be above hAL =
25°C for more than dAh = 120 minutes. This will result in
alternating between Ah and the present cabinet temperature.
Once the temperature goes below 23°C (hAL – Atd) the alarm changes from present to
being logged. The display will show current temperature and
there has been a temperature alarm.
To trigger a Low temperature alarm (AL) the cabinet temperature must be below LAL = -
29°C for more than dAL = 20 minutes. This will result in
alternating between AL and the present cabinet temperature.
Once the temperature goes above -27°C (LAL + Atd) the alarm changes from present to
being logged. The display will show current temperature and
there has been a temperature alarm.

Temperature alarms

The following temperature alarms can be displayed:
Ah Alarm high temperature
AL Alarm Low temperature
If an alarm occur, Ah or AL will be shown alternating with the current temperature.
If the temperature gets back within the accepted limits, the current temperature will be
shown in the display and
be turned off, but the alarm will still be kept in the alarm log.
Displaying alarms:
The temperature alarm log stores information related to the latest 10 temperature alarms
(named A 1 to A10). If a new alarm occurs the oldest alarm (A10) will be erased.
Push once to open the log.
• If there is no present or logged temperature alarm the display will show "no" flashing
for 4 seconds. After that the controller will revert to normal operation.
765042402
.
will remain lit until the alarm has been reset. After 3 days
Rev. 000
and
and .
Factory default
+ 25° C
- 29° C
120 minutes
20 minutes
2K
being lit and the display
being lit and the display
simultaneously for
will remain lit indicating
will remain lit indicating
37
will