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VDL (E3.1) 06/2020
Page 129/206
15. Tolerance range settings
In this menu you can define for temperature and pressure the deviation between the actual value and
setpoint, which that shall cause a tolerance range alarm. The entered value defines the limit of permitted
deviations from the set-point (exceeding and falling below). Reaching this limit triggers tolerance alarm.
In addition you can specify delay times for these alarms.
This function only activates after the set-point has been reached once.
15.1
Setting the alarm delay times and the tolerance ranges
Path:
Main menu > Settings > Various
Submenu “Various”.
•
Select the field “
Temp. alarm delay
” and enter the time in minutes, after which the temperature range
alarm shall be triggered. Setting range: 1 min to 120 min. Confirm entry with
Confirm
icon.
•
Select the field “
Temperature range
” and enter the desired value for the temperature range. Setting
range: 1,0 °C to 10,0 °C. Confirm entry with
Confirm
icon.
•
Select the field “
Press. alarm delay
” and enter the time in minutes, after which the pressure range
alarm shall be triggered. Setting range: 1 min to 120 min. Confirm entry with
Confirm
icon.
•
Select the field “
Pressure range
” and enter the desired value for the pressure range. Setting range:
10 mbar to 200 mbar. Confirm entry with
Confirm
icon.
For testing the safety temperature limiter (TB) see chap. 16.5.
After completing the settings, press the
Confirm
icon to take over the entries and exit the menu,
or
press
the
Close
icon to exit the menu without taking over the entries.
15.1.1 Alarm condition
If there are actual values outside the tolerance range the following information icons for the corresponding
parameter are displayed:
Icon
Signification
Information
“Temperature range”
The current actual temperature value is outside the tolerance range
“Pressure range”
The current actual pressure value is outside the tolerance range
If the condition persists, an alarm is triggered after the configured interval (“range alarm delay”). It is visu-
ally indicated in Normal display. If the alarm buzzer is activated (chap. 16.4) there is an audible alert. The
alarm is shown in the list of active alarms (chap. 16.3).
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