Product Manual
Tel: +0086-023-86850812
Email:[email protected]
Fax:+0086-023-67636974
Add: Building 13, 2-8, Jialing third village Pioneer Park, Jiangbei District, Chongqing
- 36 -
12. - TECHNICAL SERVICE
FAQ’s
1.
The BJ-194L mini multi-function meter, once cabled and connected is seen to give a correct
voltage and current reading, but shows negative values for active power (generation).
This is an error with the cabling for the current transformer secondary; the direction of the
transformer current has to be respected as shown in the connection diagram. The current
transformers have a two face primary; the current must pass from P1 to P2 giving the result in
secondary (S1 and S2) of 5 amps.
The error stems from:
a).
The current transformers have been incorrectly installed. As a result it gives the
direction of the current as passing from P2 to P1; to resolve this problem, the current
transformer does not have to be dismantled and installed again, but the transformer
secondary (S1 and S2) just has to be inverted.
b).
The connection of the current secondary in the current transformers have been
incorrectly connected; to resolve this problem just connect the S1 transformer secondary to
the S1 on the meter and the S2 on the current transformer to the S2 on the meter
2.
The BJ-194L, once cabled and connected, is seen to give an incoherent Power factor and
CosΦ
reading (-0.01 or similar).
This is again a current transformer and voltage phase connection error phase A, must
correspond to the current transformer installed in phase A; phase B, must correspond to the
current transformer installed in phase B; and phase C, must correspond to the current
transformer installed in phase C.
This connection is clearly shown on the back of the analyzer.
3.
The BJ-194L is measuring in average voltage and is displaying the secondary voltage (for
example 110 volts).
Ensure that the voltage Transformer ratio has been correctly set (see section on
chapter7
).