PSM1700 PsimetriQ user manual
14-4
If the parameter option in LCR menu is set to ‘auto’,
PsimetriQ will display capacitance or inductance according
to the phase of the measurement. Alternatively, the
display can be forced to capacitance, inductance or
impedance.
Capacitance is displayed with tan, inductance is displayed
with Q factor, and impedance is displayed in its resistive +
reactive form and as magnitude. The phase of the
impedance is displayed with all options.
The operating conditions for the component under test
may be selected manually or PsimetriQ will automatically
try to find appropriate conditions.
When measuring large electrolytic capacitors, it may be
necessary to add an appropriate bias voltage to polarise
the electrodes. In this case it may be necessary to select
ac coupling in the CH1 menu in order to reliably measure
the small ac voltage present.
When measuring small inductance or capacitance, it may
be necessary to zero out the stray effects from the test
connections. Press ZERO to access the compensation
menu. For inductance connect together the test leads to a
good short and select “short circuit” – the message
‘SHORT CIRCUIT ZERO SET’ will be displayed; for
capacitance disconnect the test leads and press ZERO –
the message ‘OPEN CIRCUIT ZERO SET’ will be displayed.
To remove the zero, press ZERO then press DELETE within
1.5s – the message ‘ZERO CLEARED’ will be displayed.
For repeated measurements under the same test
conditions (eg. production testing of a batch of capacitors)
it is possible to compensate for the inherent phase shift of
the connection jig. Connect a known reference component
to the system, enter the known phase shift of the
component as the “phase reference” in the ZERO menu
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