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Maintenance
7.1.4
Creep Test
7.1.5
Starting Test Active Part
7.1.6
Starting Test Reactive Part
7.2
Changing the Battery
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
A test voltage U
of 1.15 U
p
61036 (e.g. U
= 265 V with U
p
Procedure:
1.
Disconnect the meter from the network for at least 10 seconds.
2.
Then switch on the test voltage U
this time the energy direction arrows must disappear. The red optical
test outputs are permanently "lit".
3.
Switch on test mode (high resolution).
The meter must not deliver more than one pulse during the creep test.
Check the energy levels for changes in test mode. They must not in-
crease by more than the value of one pulse (see face plate).
Procedure:
1.
Apply a load current of 0.02% of the nominal current In (IEC-meters) or
0.02% of the reference current I
= 5 A – and the voltage U
I
ref
The meter must remain in creep.
2.
For ZxD410: Increase the load current to 0.2% I
(MID-meters) – e.g. 10 mA with I
I
ref
For ZxD405, ZxD402: Increase load current to 0.1% I
energy direction arrow "P" must appear within 10 seconds. The optical
test output for active energy consumption is no longer permanently "lit".
Procedure:
1.
Apply a load current of 0.02% of the nominal current I
I
= 5 A) and the voltage U
n
The meter must remain in creep.
2.
Increase the load current to 0.2% I
The energy direction arrow "Q" must appear within 10 seconds. The
optical test output for reactive energy consumption is no longer perma-
nently "lit".
If the meter is provided with a battery, this must be changed if one of the
following events occurs:
The
symbol appears on the display.
The battery has been in the meter for more than 10 years (preventive
servicing). It is recommended to note the date of insertion on the bat-
tery. The 10 years depend on the product and on the age of the battery
when inserting it into the meter.
The battery operating hours counter indicates over 80,000 hours (can
be read under code C.6.0 in service mode).
The battery charge indicates less than 4.8 V (can be read under code
C.6.1 in service mode).
is used for the creep test (no-load test) to IEC
n
= 230 V).
n
and wait approx. 10 seconds. After
p
(MID-meters) – e.g. 1 mA with I
ref
(three-phase in each case) and cosφ = 1.
n
=I
= 5 A.
n
ref
(three-phase in each case) and sinφ = 1.
n
(i.e. 10 mA with I
n
87/93
=
n
(IEC-meters) or 0.2%
n
(=0.1 I
). The
n
ref
(e.g. 1 mA with
n
= 5 A).
n
© Landis+Gyr AG
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