Hauber HE250 Series, Инструкция по эксплуатации

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HAUBER-Elektronik GmbH
15
13 Functional description
In an explosive atmosphere the vibration monitoring unit HE250 will only be
opened in a de-energized state.
The HE250 type has two limit values Lim1 and LIM2 and the corresponding delay times, which
can be adjusted separately. If the defined limit value is exceeded and after the set delay time
has expired, the corresponding relay is opened. This can be used to generate a pre-alarm and a
main alarm.
A subsequent fall below the limit value is also signalled at relay outputs 1 and 2, i.e. the
respective relay contact automatically closes.
The HE250 type also has an analogue current output. This supplies direct current of 4-20 mA
proportional to the vibration amplitude.
13.1 Operating conditions
Operating state Reading Relay LED status
OK
≤ Limit value
Closed green
WARNING > Limit value, delay time runs Closed green + yellow
ALARM > Limit value, delay time
expired Open red
Fail Safe State 0 mA Open red + green
De-energized 0 mA Open All LEDs off
Tab. 6: Operating conditions
13.2 Alarm and limit setting
By pressing the "Save Config" button, the current configuration is displayed by the LEDs around
the HEX switches. For further information, see chapter "Limit values and delay times
” on page
16.
The limit values and delay times are calibrated using the respective HEX switch. As soon as a
switch position is changed, the LEDs around the Hex switch start to blink. The number of
blinking LEDs represents the current position of the HEX switch. To save the configuration,
press and hold down the "Save Config" button for three seconds. Acceptance of the
configuration is signalled by steady lighting up of the LEDs in the selected HEX switch position.
After about five minutes the LEDs turn off automatically.