User's Manual

Programming the logger

Perform the following steps to configure the alarm thresholds:

Step

Description

1 In the segment Alarm Trigger – Settings specify whether there is a minimum

and / or a maximum threshold to be monitored by activating the respective

checkbox(es).

Enter the minimum and / or the maximum threshold into the respective field(s).

A hysteresis can be defined for alarm input preventing a constant triggering of the

alarm by measuring values fluctuating marginally around the threshold.

Enter a Hysteresis value. The Hysteresis value in percent designates a

symmetrical range around the specified threshold the input signal can fluctuate in

without having an impact on the current alarm status.

Example: (pressure sensor)

Min. level: 2.0 bar

Hysteresis: 10 %

The alarm does not switch on until the input signal reaches 90 %

of the specified threshold (here 1.8 bar). After this, the alarm does not

switch off until the input signal exceeds 110 % of the threshold

(here 2.2 bar).

Select a Debounce value. The input signal must cross the specified threshold not

only one time in order to switch an alarm on or off, but two times more after

specific periods of time. These periods of time, called ‘debounce’, always are a

multiple of the specified logging interval.

Example: (pressure sensor)

Logging interval: 5 sec

Min. level: 2.0 bar

Debounce: 15 sec

The alarm does not switch on until the input signal crosses the specified

threshold (2.0 bar) three times in succession (15 seconds).

Select the days of the week alarming should be active on by marking the

respective checkbox(es).

Configuring

alarm trigger