Fluke A3003 FC, Руководство по калибровке

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a3003 FC/a3004 FC
Calibration Manual
12
4-20 mA Clamp Performance Test
Do the performance test periodically and after calibration.
The performance test requires a calibrator with a current loop from the AUX terminal to the LO terminal. See Table 2.
To short the two terminals, use a conductor with 2 banana jacks at both ends. To ensure the clamp closes properly,
the diameter of the conductor should be no more than 4 mm. The Meter must be factory-calibrated to calibrate the
clamp.
To make the calibration adjustment:
1.
Make sure you have the necessary equipment, see Table 2.
2. Allow the Meter and the 4-20 mA clamp to stabilize to room temperature.
3. Connect the 4-20 mA clamp to a calibrated Meter.
4. Use 1 loop insulated copper wire to short circuit the calibrator current output AUX and LO terminals, see
Figure 8.
5. Clamp the 4-20 mA current clamp around the insulated copper wire. Current flow should be in the direction of the
arrow on the current clamp.
6. For each value in Table 4.
a.
Zero the Meter.
b. Apply the Calibrator Output value to the Meter.
c. Wait 4 seconds for the signal to stabilize.
d. Record the reading.
Table 3. a3003 and a3004 DC Meter Performance Verification
Test Connection Calibrator Output Resolution Specification
UUT Reading Limits
a3003 a3004
1 Year Lower
Limit
1 Year Upper
Limit
Single-turn Loop -100.0 mA 0.1 1.0 % ±5 digits -101.5 -98.5

Single-turn Loop -20.00 mA 0.01 0.2 % ±5 digits -20.09 -19.91

Single-turn Loop -2.00 mA 0.01 0.2 % ±5 digits -2.05 -1.95

Single-turn Loop 2.00 mA 0.01 0.2 % ±5 digits 1.95 2.05

Single-turn Loop 20.00 mA 0.01 0.2 % ±5 digits 19.91 20.09

Single-turn Loop 100.0 mA 0.1 1.0 % ±5 digits 98.5 101.5

25-turn Coil -80 mA (-2000 A) 1 2.5 % ±5 digits -2055 -1945

25-turn Coil -38 mA (-950.0 A) 0.1 2.0 % ±5 digits -969.5 -930.5

25-turn Coil -2 mA (-50.0 A) 0.1 2.0 % ±5 digits -51.5 -48.5

25-turn Coil 2 mA (50.0 A) 0.1 2.0 % ±5 digits 48.5 51.5

25-turn Coil 38 mA (950.0 A) 0.1 2.0 % ±5 digits 930.5 969.5

25-turn Coil 80 mA (2000 A) 1 2.5 % ±5 digits 1945 2055

Simulate -550 mV 1 1.0 % ±5 digits -2533 -2467
 
Simulate -190 mV 0.1 1.0 % ±5 digits -964.5 -935.5

Simulate -100 mV 0.1 0.2 % ±5 digits -501.0 -499.0

Simulate -10 mV 0.1 0.2 % ±5 digits -50.6 -49.4
 
Simulate 0 mV 0.1 0.2 % ±5 digits -0.5 0.5
 
Simulate 10 mV 0.1 0.2 % ±5 digits 49.4 50.6
 
Simulate 100 mV 0.1 0.2 % ±5 digits 499.0 501.0

Simulate 190 mV 0.1 1.0 % ±5 digits 935.5 964.5

Simulate 550 mV 1 1.0 % ±5 digits 2467 2533
 