TB 9-6625-1965-24
TRIGGER
LEVEL
SET
B
(8) Adjust frequency
counter
to
stop
count
(approximately 2.5 V).
(9) Repeat (7) and (8) above as necessary until frequency counter starts when
calibrator is in OPERATE; stops when calibrator is in STANDBY, and A and B TRIG
indicator lights are blinking in unison when calibrator is in OPERATE. Leave calibrator
in STANDBY after establishing trigger level.
(10) S e t m A S E C m A s w i t c h t o m A S E C a n d R E A D m A S E C - E R A S E s w i t c h
t o ERASE.
NOTE
In the following steps do not leave calibrator in OPERATE for
more than 1 second as monitored on frequency counter.
(11) Momentarily set calibrator to OPERATE. TI will indicate 00.0 0.1 mASEC; if
not, perform b (1) through (4) below.
(12) Set READ mASEC-ERASE switch to READ mASEC.
(13) Momentarily set calibrator to OPERATE. If TI does not indicate same reading
2 digits, perform b (5) through
in mASEC as frequency counter indicates in time,
(16) below.
(14) Press TI RANGE 2000MA pushbutton and repeat steps 12 a (3), (4), (5), (9),
and (10) above.
(15) Momentarily set calibrator to OPERATE. TI will indicate 000
1 mASEC.
(16) Set READ mASEC-ERASE switch to READ mASEC.
(17) Momentarily set calibrator to OPERATE. TI will indicate the same reading in
mA as frequency counter indicates in time, 2 digits.
b. Adjustments
(1) Disconnect TI from equipment setup.
(2) Set READ mASEC-ERASE switch to ERASE.
(3) Set mASEC mA switch to mASEC. If TI does not indicate 0000, 1 digit, adjust
R14 ZERO (fig. 2) until TI indicates 0000.
(4) Using cables of equal length connect calibrator output to TI MA and COMMON
inputs and to frequency counter A input.
(5) Set mASEC mA switch to mA.
(6) Set calibrator for an initial 22 mA output and, if necessary, rotate calibrator
knob below EDIT FIELD pushbutton to adjust calibrator for a TI indication of 22 mA.
(7) Set calibrator to STANDBY.
(8) Connect digital multimeter to TI TP3 (fig. 2) and COMMON terminal.
(9) Set mASEC mA switch to mASEC.
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