BARTINGTON INSTRUMENTS
Page 16 of 19 OM2441/1
The meter readings are in volts. To convert the analogue voltage level into units of magnetic field
at the magnetometer, refer to
Converting Output Voltage to Magnetic Units
.
Note:
The meters are updated at 3 readings per second and hence will only indicate the DC
component (strictly, frequencies below 1Hz) present in the conditioned output voltage.
8. Troubleshooting
The SCU1 is unlikely to suffer any defects in normal use: no internal components are
serviceable. The most likely causes of failure, and their solutions, are detailed in the following
table.
In the event of any apparent malfunction beyond those described in the table below, please email
, or telephone the Bartington Instruments service team on +44 (0)1993
706565.
Fault
Possible cause
Solution
Panel meters are
off
Power fault
Check SCU1 is connected to a mains supply.
Check the ON/OFF switch position.
Check the fuse in the IEC socket (see
Conditioned
output shows an
unexpected DC
level, or is “stuck”
at a large + or -
value
High pass filter,
offset or gain
control settings
could be affecting
the signal
Ensure that the HPF is set to 0 (OFF).
Check that the relevant offset control is OFF.
If offset must be used, check the polarity is
correct.
Ensure the signal is not over-range due to
excessive gain.
Ensure you account for any gain applied in
your conversion of voltage to magnetic units.
AC signals are
distorted or clipped
Gain is too high
Switch to a lower gain setting.
Magnetometer is
unusually hot
Power supply
voltage is too high
Lower the voltage supply to the
magnetometer.
