TB 9-6625-2170-24
(6) Set calibrator frequency to 60 Hz. True rms voltmeter indication will be d 1.58 V.
(7) Repeat technique of (4) through (6) above using settings listed in table 3. True
rms voltmeter will indicate within limits specified.
True rms
Test instrument
Calibrator
INPUT RANGE
output settings
switch settings
(mV)
(50 and 60 Hz)
2 mV
50
mV
d158.0
20 mV
50
mV
d15.8
200 mV
0.1
V
d3.2
600 mV
0.3
V
d1.0
2V
1
V
d3.2
6V
3
V
d1.0
20 V
10
V
d3.2
60 V
30
V
d1.0
200 V
100
V
d3.2
b. Adjustments. No adjustments can be made.
a. Performance Check
(1) Connect calibrator OUTPUT HI and LO to ratio transformer INPUT 2 and 3.
(2) Connect ratio transformer output 5 and 6 to TI INPUT + and -.
(3) Position controls as listed in (a) through (e) below:
(a) INPUT RANGE switch to 200 PV.
(b) FUNCTION VOLTS pushbutton pressed.
(c) FUNCTION LEVEL pushbutton pressed.
(d) RESPONSE RMS/AVG pushbutton pressed to RMS.
(e) All FILTERS pushbuttons released.
(4) Set ratio transformer dials to .0010000 and calibrator for a 100 mV, 1 kHz
output. If TI does not indicate between 97.9 and 102.1 PV, perform b below.
(5) Set calibrator to STANDBY and remove ratio transformer from equipment
setup. Connect calibrator OUTPUT HI and LO to TI INPUT + and -.
(6) Set TI INPUT RANGE switch and calibrator output to settings listed in table 4. If
TI does not indicate within limits specified, perform b below.