TB 9-4931-406-40
APPENDIX A
REPORT OF CALIBRATION FOR THERMAL CONVERTER SET
(BALLANTINE, MODELS 1395 AND 1395A SERIES,
HEWLETT-PACKARD, MODELS 11049A, 110501, AND 11051A,
AND FILMOHM, MODEL B7842)
(ORGANIZATION)___________________________________________________________________________________________________________
Determinations were made of the differences between high and low frequency AC required for the same test instrument output. The
observed differences (in percent) are given in the following table. A ( + ) positive sign indicated that more high frequency AC voltage was
required to produce the same test instrument output. High to low frequency AC voltage differences will be known to the accuracies stated
in frequency column heading. Low frequency reference is 400 Hz.
HIGH TO LOW FREQUENCY AC VOLTAGE DIFFERENCE
APPLIED
MODEL NO.
SERIAL NO.
VOLTAG
20 kHz
50 kHz 100 kHz
1 MHz 3 MHz 10 MHz 30 MHz See note 1
E (V ac)
0.1%
0.2%
0.25%
0.5%
0.6%
0.6%
1.5%
7842-1
3
1395-3
1395A-3
7842-2
1
1395-2
1395A-1
7842-3
0.3
1395-1
1395A-0.4
3
11049A
1
11050A
1395A-0.4-
0.3
M75-98
11051A-H07-
0.4
003
1 Blank
columns provided for optional test points. Refer to table 1 for calibration accuracy.
A-2