Set The Compensation Residual Impedance Correction Value - Fluke Calibration 5322A Operator's Manual

Set the Compensation Residual Impedance Correction Value

The Product has a compensation circuit to electrically compensate for residual
impedance. The compensation circuit is limited in test current amplitude and
length of measurement. The maximum test current generated by the DUT has to
be less than 25 A and 1500 ms in duration. See the graph of the compensator
working conditions in the 5322A Specifications located at the Fluke Calibration
website. The Product will disconnect the compensation mode when overloaded
and automatically set the correction mode to OFF. The maximum compensation
is 2 Ω.
•
Check an actual mains circuit first before connecting the
DUT to the Product to ensure that the DUT is working
properly.
•
Do not exceed the maximum levels of test current,
including spikes and time period when using the
compensator. The limits are defined in the
Specifications found at www.Flukecal.com.
•
Though the compensator has hardware and firmware
protection, it is not fully protected against fast, high-
level current spikes. The spikes can arise especially
when a DUT is damaged, for example, if the DUT's input
terminals are internally shorted.
•
For DUTs in an unknown condition and with a risk of
having failed, for example, with internally shorted
terminals, do not use the COMP mode. Damage to the
Product may result. The SCAN mode can be used to see
that the DUT readings give the expected results.
To select the compensation method of residual impedance correction:
1. Push the Setup softkey.
2. Using the cursor keys or rotary knob, move the cursor to Line imp. COMP
value (Loop imp. COMP value for Loop impedance function) and either
push the Select softkey or push in the rotary knob.
The Product measures the residual impedance and the compensator uses
the measured value to set the compensation circuit.
3. Push the Exit softkey repeatedly to return to the main menu.
To use this compensation mode, select the COMP residual impedance
compensation mode as described in the Select the Residual Impedance
Correction Mode section earlier in this section. When the Residual Impedance
Correction mode is set to COMP, the stored scanned value is used to set the
compensation circuit parameters to electronically zero the actual residual
impedance. Only the selected loop or line impedance value is displayed on the
screen during a calibration.
W Caution
Multifunction Electrical Tester Calibrator
Use the Loop and Line Impedance Function
49