Maintenance; Meter Check; Meter Testing; Measurement Times - Landis+Gyr E230 User Manual

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7

Maintenance

7.1

Meter check

7.2

Meter testing

7.2.1

Measurement Times

ZMR
U =230V
n
Current
[A]
0.2
0.5
≥ 1
© Landis+Gyr
While it is not necessary, under normal circumstances, to perform any
maintenance on the installed meter, the following are check points that
should be observed during scheduled periodic meter visits.

Is the meter dry and clean, particularly the LCD display and the
optical interface?

Does the meter display a legible and sensible display? I.e. does the
meter appear to be in a serviceable condition?

Check that all factory- and company-fitted seals are secure and
intact.

Observe display for any error messages or notifications

Confirm that the energy registers have changed to a reasonable
degree since the last visit.

If irregularities are found, continue as described in section7.3.
The testing of meters, either random sample or on all meters, should be
carried out periodically according to national regulations. The meter
must be removed as described in section 7.4 and replaced with a meter
of similar type for the duration of the tests.
For technical reasons, higher measurement deviations can occur during
short-term measurements. It is therefore recommended to use
sufficiently long measurement times in order to achieve the required
accuracy.
Table of required measurement times:
Measurement Uncertainty
0.2%
3 ph 1 ph
cosφ=1 cosφ=1
25 s 70 s
20 s 20 s
20 s 20 s
3 ph = balanced load
D000044352 en g – E230 Residential Electricity Meter – ZxR100xC/ZMR100xR – User Manual
Measurement Uncertainty
0.1%
3 ph 3 ph
cosφ=0.5 cosφ=1
90 s 90 s
20 s 20 s
20 s 20 s
1 ph = single-phase load
Maintenance
1 ph 3 ph
cosφ=1 cosφ=0.5
4.5 min 6 min
45 s 60 s
20 s 20 s