TB 9-4931-406-40
APPENDIX A
REPORT OF CALIBRATION FOR THERMAL CONVERTER SET
(BALLANTINE, MODEL 1394 SERIES)
(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.
APPLIED
MODEL
SERIAL
HIGH TO LOW FREQUENCY AC VOLTAGE DIFFERENCE
VOLTAGE
NO.
NO.
(V ac)
50 kHz
1 MHz
10 MHz
30 MHz
100 MHz
See note 1
See note 1
See note 1
See note 1
See note 1
1394-0.5
0.5
0.2%
0.5%
0.6%
1.5%
4%
1394-1
1
1394-2
2
1 Blank
columns provided for optional test points. Refer to table 1 for calibration accuracy.
A-1