TB 9-6625-2097-24
CALIBRATION PROCESS FOR FREQUENCY DEVIATION CONVERTER
MODEL 13-4618-00
16. Preliminary Instructions
a. The instructions outlined in paragraphs 16 and 17 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
17. Equipment Setup
a. Remove protective cover from TI.
b. Slide all manual ink valves with tubing attached to ON position on recorder.
c. Connect TI to recorder, using extender.
d. Set CENTER FREQUENCY switch to 50.
e. Energize equipment and allow 30 minutes for warm-up and stabilization.
18. Span Gain
a. Performance Check
(1) Connect multimeter negative lead to TP3 and positive lead to TP4 (fig. 4).
(2) Set DEVIATION RANGE switch to OFF. If multimeter does not indicate 0 10
mV, perform b (1) below.
(3) Connect calibrator to TI input (rear) connector pins 1 and 2.
(4) Set DEVIATION RANGE switch to .5.
(5) Set calibrator for a 10 V at 50 Hz output. If multimeter does not indicate 0 100
mV, perform b (2) below.
(6) Set CENTER FREQUENCY switch to 60.