USER MANUAL – Z-GPRS2 / Z-LOGGER
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18.
ALARMS ON ANALOG INPUTS
Voltage or current can be set for each of the 2 analog inputs in the “Analog Input Setup” section.
Input acquisition time is 50ms.
Seneca recommends you ALWAYS enable analog input filter ("read filter on" item) to obtain the
most stable reading not influenced by external disturbances.
You can set input voltage mode with range from 0 to 30V.
Inputs in current mode have a range from 0 to 20 mA.
You can also scale analog readings in technical units.
4 different alarms can be set for each input:
Alarm on HIGH value
Alarm on LOW value
Alarm on MAXIMUM value
Alarm on MINIMUM value
18.1.
Analog input filter
A filter can be set for analog inputs. This filter is mobile mean type on 20 samples. This type of
filter lets you stabilise the reading even with highly disturbed signals.
18.2.
Alarm on High and Maximum
“High” and “Maximum” alarms let you enable two different maximum alarms. A hysteresis can
also be set (shown as “hist” in the illustration).
The following illustration shows how an alarm works with the relevant reset values. For example,
for an alarm on maximum (with Alarm Delay = 0 and Alarm Reset Time = 0):
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