Capacitance Substitution Calibration

TB 9-4920-451-35

10. Capacitance Substitution Calibration

a. Performance Check

(1) Configure the precision component analyzer to measure capacitance and connect

to TO IND LOZ and TO IND HIZ on TI.

(2) Connect shorting plug (p/o TI) to TO IND LOZ COMP.

(3) Energize precision component analyzer and allow sufficient warm-up time.

(4) Set MODE SELECT switch to MEAS INT position.

(5) Set T/U COMP switch to T/U and RANGE switch to LO position.

(6) Set TANK UNIT SIMULATOR X1000 pF and X100 pF switches to 0.

(7) Adjust TANK UNIT SIMULATOR SET control for a 40-pF reading on digital

display (push down on control for coarse tuning and let up for fine tuning).

NOTE

To attain readings greater than 100 pf on digital display the

SIMULATOR TANK UNIT X100 pf may have to be in a

position other than 0.

(8) Set MODE SELECT switch to SIM position. Precision component analyzer will

indicate between 39.8 and 40.2 pF.

(9) Repeat (4), (7) and (8) above for settings and indications up to 800 pF as shown

(10) Set RANGE switch to HI position and SIMULATOR TANK UNIT X100 pF

switch to 9.

(11) Adjust SIMULATOR TANK UNIT SET control for a 1000 pF indication on TI

display. Precision component analyzer will indicate between 995.0 and 1005 pF.

(12) Set X1000 pF switch to 1 and adjust SIMULATOR TANK UNIT SET control

for a 2000 pF indication on TI display. Precision component analyzer will indicate between

1990.0 and 2010.0 pF.

(13) Set controls as listed in (a) through (c) below:

(a) T/U COMP switch to COMP.

(b) RANGE switch to LO.