Figure 2. Calibrator A1 circuit board

Calibration Procedure For Calibrator Model 8477A Page Navigation
6

TB 9-6625-1956-24

Figure 2. Calibrator A1 circuit board - component location.

(8) Connect multimeter positive lead to TP2 (fig. 2) and the negative lead to TP3 (fig. 2).

(9) Adjust A1R37 (ZERO ADJ) (fig. 2) for a multimeter indication of 0.0000 V dc (R).

(10) Connect multimeter positive lead to TP7 (fig. 2) and the negative lead to TP 6 (fig. 2).

(11) Adjust A1R24 (OFFSET ADJ) (fig. 2) for a multimeter indication of 0.0000 V dc (R).

9. Set, Check, and V Comp

a. Performance Check

(1) Connect multimeter as shown in figure 1, connection B.

(2) Turn TI POWER (mW) switch to .01.

(3) Turn TI FUNCTION switch to SET.

(4) Set power meter MOUNT RESISTANCE switch to 200 . The multimeter will

indicate between 5.890 and 5.910 V dc.

(5) Turn TI FUNCTION switch to CHECK. The multimeter will indicate between

2.190 and 2.210 V dc.

(6) Turn TI FUNCTION switch to 200 . The multimeter will indicate between

5.897 and 5.903 V dc.

(7) Turn TI POWER (mW) switch to .03, .1, .3, 1, 2, and 3. In each position the

multimeter will indicate between 5.897 and 5.903 V dc.