Fluke 321 User Manual

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Calibration Information
10
321 Calibration Adjustment
Use the following steps to adjust the calibration of the 321 (refer to Figure 4):
1. Remove the screws on the bottom of the Meter.
2. Lift off the top case.
3. Apply 600.0 V 50 Hz from the 5520A.
4. Adjust VR1 until display reads within 1.0 V.
5. Apply 4 A 50 Hz from the 5520A to the 50-turn coil. The 50-turn coil will make the meter read 200.0
A 50 Hz .
6. Adjust VR2 until the display reads within 0.5 A. A mirror will need to be used because the calibration
point cannot be seen from the top side of the meter.
7. Replace the top case.
8. Replace the case screws.
9. Verify the calibration by going through the performance test procedures.

Fluke 321 Specifications

General

Type	Clamp Meter
Continuity	≤ 30 Ω
Jaw Opening	25 mm
Safety Rating	CAT III 600 V
Battery Type	2 x AAA
Weight	220 g
AC Voltage Range	600 V
DC Voltage Range	600 V