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EK280
4.6 Monitoring the load at measurement conditions Qm in the archive
The EK280 offers the possibility of monitoring the loads of connected counters. In this way it can be
ascertained whether pressure should be increased slowly or a valve/flap be opened suddenly during
commissioning of the plant. In this case there is a risk that the connected counter (this is particularly critical
with a turbine) will be subjected to a pressure shock and may be damaged (bearing damage).
Monitoring will not be constant, but is started only when a threshold value is exceeded. When this is
exceeded, recording will commence at the most rapid interval of 2 seconds. The last 5000 rows of the
measured load of input 2 (Q2) will be archived in flexible archive 12. The maximum record size is 5000 rows.
i
The HF probe of the gas meter (A1S / A1R) must be connected to input 2!
The EK280 must be mains supplied in order to be able to record the pulses from the HF probe!
4.6.1 Pulse generator connection
Danger!
For EK280 with internal power supply, the mains voltage must be switched off before
opening the housing, ensure it is not turned back on and verify that there is no voltage.
LF / Encoder for
volume conversion)
Connect the LF pulse generator (LF reed contact) or the encoder of the gas meter for the calibrating
metering period to terminal "DE1" of the EK280.
Connect the HF pulse generator (HF Namur) to terminal "DE2"
DE1
DE2
+
-
+
-
Transmitter 1
Application Manual
+
-
Pulse generator
HF
(Namur)
26
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