RMG TERZ 94, Руководство по эксплуатации

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Operation
Operating Instructions for the TERZ 94 Electronic Turbine Meter
35
4. Pulse comparator
The 2-channel version of the TERZ-94 (TRZ03 TE / TEL) provides for pulse
monitoring.
Pulse monitoring requires two input pulses which are out of phase.
If a pulse occurs at the same time on channel 1
and channel 2, a fault
counter is increased. If there is a missing pulse on one of the two channels, a
fault counter is increased, too.
If this fault counter reaches the value
X (A10) before Y (A11) undisturbed
pulses have entered one of the two channels, a fault will be outputted.
This fault will not be erased until
Y undisturbed pulses have been counted.
5. Flow rate at 4 mA
With this parameter, you set the flow rate (in m
3
/h) which corresponds to an
outputted current of 4 mA. Generally, the minimum flow rate Q
min
of the meter
is set here. (This setting is made in the factory.)
6. Flow rate at 20 mA
With this parameter, you set the flow rate (in m
3
/h) which corresponds to an
outputted current of 20 mA. Generally, the maximum flow rate Q
max
of the
meter is set here. (This setting is made in the factory.) Then the current which
will be outputted for flow rates within the programmed limits will be between
4 and 20
mA and results from linear conversion.
7. Current default value (calibration current)
With this parameter, you set the value of the calibration current. A constant
calibration current is outputted if the current output mode parameter is set to
default. The value of the calibration current must be within the following limits:
Minimum value: 4 mA
Maximum value: 20 mA
8. Current output mode
Here you define the measured or default value which is to be outputted.
0: Default value (see above)
1: Flow rate Qm