302+/303/305
Calibration Manual
10
Backlight
To verify that the backlight functions:
1. With the Product on, push . The backlight comes on.
2. Push again to turn off the backlight.
3. If the backlight does not function correctly, repair is necessary. See “Contact Fluke”.
Button Test
To verify that the buttons function, turn on the Product and push each button separately.
Each button push causes the Product to beep. When you push the HOLD button,
shows on the display. If the buttons do nothing, repair is necessary. See “Contact
Fluke”.
Current
To do the ac current test:
1. Connect the Calibrator A ac output and ground to the 50-Turn Coil. See Figure 4 for
test connections.
2. Turn the Product to .
3. Apply the input level for each step shown in Table 4.
4. Compare the indication on the Product display with the UUT reading limits in
Table 4.
5. If the display indication is outside of the range shown in Table 4, calibration
adjustment or repair of the Product is necessary. See “Calibration Adjustment”.
Table 4. AC Current Performance Tests
Test
(Switch
Position)
Calibrator Output 302+ 303
UUT Meter Reading Limit
Low High
A ac
(with 50-
turn coil)
0.24 A, 50 Hz x x 11.3 A 12.7 A
0.24 A, 400 Hz x x 11.2 A 12.8 A
2.4 A, 50 Hz x x 117.3 A 122.7 A
5.4 A, 50 Hz x x 264.6 A 275.4 A
7.8 A, 50 Hz x N/A 382.5 A 397.5 A
10.8 A, 50 Hz N/A x 529.8 A 550.2 A
7.8 A, 150 Hz x N/A 379.8 A 400.3 A
10.8 A, 150 Hz N/A x 526.0 A 554.0 A
6 A, 400 Hz x x 292.0 A 308.0 A
305
A ac
(with 50-
turn coil)
0.2 A, 50 Hz 9.4 A 10.7 A
0.2 A, 400 Hz 9.4 A 10.7 A
4 A, 50 Hz 196.5 A 203.5 A
12 A, 50 Hz 590.5 A 609.5 A
19.5 A, 50 Hz 959.9 A 990.1 A
19.5 A, 150 Hz 959.9 A 990.1 A
12 A, 400 Hz 590.5 A 609.5 A
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