Internal Calibration

TB 9-4920-451-35

(3) Set S5 (left most toggle switch, fig.1) to the IN position.

(4) If digital display does not indicate value stamped above S5 (fig.1), perform b (1)

below.

(5) Set switches as listed in (a) through (c) below (fig. 1).

(a) S5 to OUT position.

(b) S6 to IN position. If digital display does not indicate value stamped above

S6 perform b (2) below.

(6) Repeat (3) through (5) (c) until both display values are equal to value stamped

above each switch and no further adjustments are required.

(7) Set switches as listed in (a) through (g) below (fig 1):

(a) RANGE to HI position.

(b) S6 to IN position. If display does not indicate value stamped above S6,

perform b (3) below.

stamped above S7 , perform b (4) below.

(d) S7 to OUT position.

(e) MODE SELECT to MEG position and MEGOHMMETER SELECT to

EXT position.

(f) S8 to IN position. If MEGOHMS meter does not read value stamped above

S8 , perform b (5) below.

(g) S8 to OUT and S9 (farthest right toggle switch fig.1) to IN positions.

(8) If MEGOHMS meter does not read value stamped above S9 (fig 1), perform b (6)

below.

(9) Set S9 switch (fig.1) to OUT position.

b. Adjustments

(1) Adjust LO RANGE OFFSET trimmer screw (fig. 1) until display reads same as

value stamped above S5 switch (fig.1) (R).

(2) Adjust LO RANGE GAIN trimmer screw until display reads same as value

stamped above S6 switch (fig.1) (R).

(3) Adjust HI RANGE OFFSET trimmer screw until display reads same as value

stamped above S6 switch (fig.1) (R).