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H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
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Maintenance
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7 Maintenance
Based on our experience as long-term meter manufacturers, electronic
meters require no maintenance.
Note
Meter modifcation
No conversion, modification or retrofitting of the meter is allowed unless
stated in this chapter!
7.1 Meter
Tests
A meter accuracy check should be performed periodically according to
national regulations, usually every 8 years.
When testing the meter, the measuring conditions and the measuring
points must follow the IEC meter standards.
Use test equipment according to regulations for Cl.0.2S.
7.1.1 Measuring
Times
Metering Point
Measuring Time
1%In cos
ϕ
= 1
90 s
2%In cos
ϕ
= 0.5
90 s
all-phase
100%In cos
ϕ
= 1
10 s
single phase
100%In cos
ϕ
= 0.5
40 s
7.1.2 Optical
Test
Outputs
The green optical test outputs supply pulses at a frequency dependent on
the load applied and the meter constant R. The pulse’s rising edge is
always decisive for the test.
After switch on of voltage and current, wait 1 second for measurement to
be started.
The impulse frequency at nominal load Pn is between 4 and 6 Hz.
7.1.3 Test
Transmitting
Contacts
The test transmitting contacts are checked for accuracy with the same test
as for the optical test outputs.
Summary of Contents for ZMQ202
Page 4: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 4 88...
Page 28: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 28 88 Description of Unit...
Page 54: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 54 88 Installation De installation...
Page 66: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 66 88 Operation...
Page 74: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 74 88 Service...
Page 84: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 84 88 Maintenance...
Page 86: ...Landis Gyr H 71 0200 0215 f en ZMQ202 ZFQ202 User Manual 86 88 Disposal...