TB-9-4931-290-50 Calibration Procedure for Voltage Calibrator Ballantine Model 421A Manual

CALIBRATION PROCEDURE FOR VOLTAGE CALIBRATOR, BALLANTINE MODEL 421A
SECTION I IDENTIFICATION AND DESCRIPTION - TB-9-4931-290-500002
SECTION III CALIBRATION PROCESS - TB-9-4931-290-500003
Output Stability
Table 3. Ac Voltage - Continued
Figure 1. Model 421A (above S/N 901) adjustments
Dc Voltage - TB-9-4931-290-500007
Adjustments - TB-9-4931-290-500008
Distortion and Frequency
TB-9-4931-290-50 Calibration Procedure for Voltage Calibrator Ballantine Model 421A Manual

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