The 5322A is a staple in Fluke’s lineup of electrical safety tester calibrators. It facilitates compliance with the verification/calibration regulations for various electrical testers.
The 5322A combines multiple functions into a single instrument, enabling the user to calibrate insulation resistance meters, continuity testers, multifunction installation testers, portable appliance testers (PATs), earth resistance testers, loop/line impedance testers, ground bond testers, RCD testers, leakage current testers, and high potential (hipot) testers.
Here are the 10 best features of the 5322A:
1. Five-Kilovolt High Resistance Source Option (5322A-5), Continuously Adjustable from 10 Kiloohms to 100 Gigaohms
This option enables the direct calibration of 2- and 3-terminal insulation testers and hand-cranked megohmmeters up to five kilovolts (kV). This solves the problem that 2-terminal > 1.5-kilovolt testers could not be calibrated using the HV Divider/ R-Multiplier box accessory.
The standard high-resistance source goes up to 1.5 kilovolts, 10 kiloohms (kΩ) to 10 gigaohms (GΩ) continuously adjustable, and 100-gigaohm fixed value.
2. High-Resistance Source Hot-Switching to Three Kilovolts
This allows you to adjust the resistance value (slewing) with the output energized and is particularly useful for the calibration of the analog insulation testers by allowing the device under test to be set to read specific scale values.
3. 4-wire Connection for Ground Bond Resistance (GBR ZGND) Source
The user can select 2- or 4-wire connection as required, thus ensuring better accuracy for 4-wire devices under test (DUTs).
4. High-Voltage Voltmeter Range (Up to 5 Kilovolt Root-Mean-Square) and High-Voltage (HV) Input Terminal
You can directly measure high voltage up to five kilovolts DC and AC root-mean-square (RMS), without the use of high voltage probes with a better measurement specification than the measurement with a high voltage probe.
5. Maintain Output ON When ZL Resistance Value Changes
This feature helps avoid the mains-powered DUTs resetting and losing displayed measurement value if the operator changes ZL output value and the calibrator output switches to STBY.
6. RCD Function User-Selectable Output on Auto-Reconnection After Tripping
The calibrator output reverts to OPERATE mode two seconds after entering STBY tripping, reconnecting power to the DUT, and readying the calibrator to detect a subsequent trip stimulus current event from the DUT.
This feature simplifies the calibration of DUTs with only auto-sequenced RCD tests that otherwise require repeated rapid user interventions (i.e. DUTs without individual test current/phase selections, including some PAT testers with RCD functions).
7. PAT RCD mode
This mode employs differential L-N DUT test (trip) current detection and makes the 5322A RCD function compatible with PAT tester RCD test stimulus current generation topologies used by some models that otherwise prevents correct calibrator tripping (e.g. Fluke 6500-2 PAT).
8. Flash Test Output Voltage and Leakage Current Calibration Modes
The 5322A can measure PAT testers under Class II Flash test conditions (three-kilovolt differential, 1.5-kilovolt common mode), now fully addressing the PAT tester workload calibration requirements.
9. 10-Kilovolt R-Multiplier and 10-Kilovolt High Voltage Divider
These are supplied as standard. The R-multiplier extends the 1.5-kilovolt standard and optional five-kilovolt HVR functions to 10 kilovolts. The HV divider extends METER voltmeter range up to 10 kilovolts. As single-purpose devices, they simplify connections, avoiding user issues with the previous dual-purpose design.
10. PAT RCD and PAT Load Power Test Adapter Leads
These adapter leads simplify interconnections, reduce complexity, avoid safety issues, prevent mistakes, and reduce the opportunity for error when calibrating PAT testers.