Modeles 4370 UR1800 Recorder Instruction Manual

9.1.7 How to Select Alarm Hysteresis ON/OFF
The alarm hysteresis is the difference between the levels of alarm occurence and reset.
You can choose between two levels of hysteresis: 0% (=OFF) and approx. 0.5% of the
recording span (=ON) (common for all alarms).
The inititial value is ‘ON’.
High Limit Alarm(H)
1V
Figure 9.5
Alarm generated
Measured value
Low Limit Alarm(L)
1V
Measured value
Alarm generated
Alarm release
Alarm release
Alarm setting value
- - Hysteresis (approx. 0.5%)
- - Hysteresis (approx. 0.5%)
Alarm setting value
SETTING PROCEDURE:
Enter the SET UP Mode by turning ‘ON’ the power while pressing and holding the
ENT-key until the SET UP display appears.
Use the UP/DOWN-keys to select the display ‘SETUP=ALARM’. Press the ENT-key.
Press the ENT-key until the display ‘ALM_HYS=ON’ appears. Select ON or OFF.
After selection, press the ENT-key. The display ‘*ALARM SET*’ will appear.
The alarm hysteresis setting has been completed, but has not been stored yet. You can
now adjust other settings in the SET UP Mode, by using the ESC-key.
Before leaving the SET UP Mode, you have to store your new settings. Press the ESCkey
to return to the ‘SETUP=ALARM’ display and then select the ‘SETUP=END’
display.
Press the ENT-key. Select ‘END=STORE’ to keep your new settings or
‘END=ABORT’ and press the ENT-key. After a few seconds, the Operation Mode will
appear.
NOTE Hysteresis setting is only valid for High and Low alarms. Hysteresis setting for rate-ofchange
alarms and difference alarms will be ignored.
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