TB 9-6625-162-24
NOTE
The 40/400 auto ranging model for DC current (Defaults to Lo):
Lo: 0-399.9 A (Shifts to Hi at 400.0 A) and Hi: 150-2000 A
(Shifts to Lo at 149 A).
(1) Connect Ammeter Calibrator to the current coil.
(2) Set TI function switch to DC and 200A; for the auto ranging model set TI
A. DC should be shown on the upper left corner of the display.
function switch to
(3) Position TI clamp so it is centered on current coil.
(4) Set Ammeter Calibrator output for first value in table 7. If TI does not indicate
within limits specified in first row of table 7, perform b below.
(5) Repeat technique of (4) above, using the remaining settings and indications
listed in table 7. If TI does not indicate within limits specified in table 7, perform b below.
Test instrument
Ammeter
Coil output
Calibrator
Range (A dc) 1
Calibrator
(A dc)
Output
Min
Max
(A dc)
(V dc)
(A dc)
(A dc)
200, 2000
400, 2000
Range
Output
0.33
20
49.5
200
400
48.6
50.4
0.66
20
99
200
400
98.3
101.7
0.94
20
141
200
400
137.7
142.3
1.34
20
201
200
400
197.8
204.2
0.266
100
399
---
400
392.8
405.2
0.67
100
1005
2000
2000
989.7
1020.3
1.00
100
1500
2000
2000
1477.3
1522.7
Dc current calibrated to 1500 amps only.
1
(6) Set Ammeter Calibrator output to minimum.
b. Adjustments (20/200 Model Only)
(1) Set the TI range to 200 A dc.
(2) Set the calibrator for a 1.26 Volts Dc output into the ammeter calibrator with
the ammeter calibrator set on the 20A range.
(3) Clamp the TI around the coil and turn VR (10) so that 189.0 is indicated on the LCD.
a. Performance Check
NOTE
The 40/400 auto ranging model for AC current (Defaults to Lo).
Lo: 0-399.9 A (Shifts to Hi at 400.0 A) and Hi: 150-2000 A
(Shifts to Lo at 149 A).
(1) Connect Ammeter Calibrator to current coil.
(2) Set TI function switch to AC/ Ω and AC200A; for the 40/400 auto ranging model
set TI function ~A.
(3) Position TI clamp so it is centered on current coil.