SECTION II. EQUIPMENT REQUIREMENTS

Calibration Procedure For Oscilloscope Type, 305 Dmm Page Navigation
2

TB 9-6625-2183-24

Table 1. Calibration Description - Continued

Test instrument

Performance specifications

parameters

Range: 1 s/div to 0.5 s/div

Horizontal

timing

18 steps in a 1-2-5 sequence, X10 mag extends

fastest sweep to 0.1 s/div

Accuracy: Unmag: 3% over center 8 div except

disregard first 0.5 s of sweep

Mag: X10 5% over center 8 div except exclude

first 10 div and all past 90 div

Gain

Range: 5 mV/div to 10 V/div 11 steps in a 1-2-5 sequence

Accuracy: 4%

Within 0.1 div or less bowing or tilt of a displayed

vertical or horizontal line

Range: 2, 20, 200, 1000 V

Accuracy: 0.1%, of reading 2 counts

Range: 2, 20, and 700 V ac, 40 to 500 Hz

Accuracy: 5%, 10 counts

Range: 2, 20, 200, 2000 k

ccuracy: 0.6%, 3 counts

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 2 identifies the specific equipment to be used in this

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Sets AN/GSM-286, AN/GSM-287 or AN/GSM-705. Alternate items may be used

by the calibrating activity. The items selected must be verified to perform satisfactorily

prior to use and must bear evidence of current calibration. The equipment must meet or

exceed the minimum use specifications listed in table 2. The accuracies listed in table 2

provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio

cannot be met, the actual accuracy of the equipment selected is shown in parenthesis.

5. Accessories Required. The accessories required for this calibration are common

usage accessories, issued as indicated in paragraph 4 above, and are not listed in this

calibration procedure. The following peculiar accessory is required for this calibration: DC

power supply; Elgar, model DCS40-30EM10.