ELPRO ECOLOG TN2 Mode D'emploi page 17

4. Definition of Alarm Parameters
The dataloggers ECOLOG have an alarm indication feature and an alarm contact. The alarm parameters are defined in
the „Setup of Alarm Parameters" window.
- Alarmindication
The alarm indication is independent of the sensor number, but all sensors that may cause an alarm have to be selected
in the measurement function. The alarm indication has to be reset manually. It is possible to reset the alarm indication by
the PC software, the keyboard or the alarm reset connector.
- Alarm contact
In case of an alarm indication, the alarm contact is closed. The alarm contact is independent of the sensor number, but
all sensors that may cause an alarm have to be selected in the measurement function.
- Limit value & Hysteresis
Overstepping the limit value
Alarm
Limit value
Alarm Delay Time
D-EZ-6003Bh
Getting Started
ECOLOG
Over/Understepping the limit value
Measurement values within the limits
Hysteresis
Alarm on By activating this check box, the alarm function is
switched on, see also chapter 2.6.
Alarm Thresholds Data entry field for lower and uper limit values.
Hysteresis The switching hysteresis is used to avoid uncontrolled on/
off switching of the contact. To move the contact, the
measurement value has to differ from the limit value by the
value defined in this field.
Alarm Delay Time - normal
To close the alarm contact, the duration of a measure-
ment value, outside the limit values, has to be longer than
the delay time defined in the "normal" data entry field.
- defrost on
If the "check defrost" function is selected and the defrost
contact D1 is closed, then the duration of a measurement
value, outside the limit values, has to be longer than the
delay time defined in the "defrost on" data entry field.
Alarm Output - no selection
This mode is used for all applications where the alarm
contact is used to control any external devices like a flash
light or a telephon dailling unit.
The contact will be closed as long as a limit value is
exeded.
- self-sustaining
This mode is used for all applications where the alarm
contact is used to control any external devices like a flash
light or a telephon dailling unit.
The contact will be closed till the alarm is reseted by the
user.
Print Status This button is used to printout the current status with the
alarm parameters.
Understepping the limit value
Limit value
Hysteresis
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11. 2016