TB 9-6625-2020-24
Paragraph
Page
Dc volts ...........................................................................
Ohms ..............................................................................
Dc current ......................................................................
Ac volts ...........................................................................
Ac decibels......................................................................
Power supply..................................................................
Final procedure..............................................................
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Digital Multimeter, Tektronix, Types DM 502 and DM 502A.
The
manufacturers' manuals were used as the prime data sources in compiling these
instructions. The equipment being calibrated will be referred to as the TI (test instrument)
throughout this bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 2
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Test instrument
Performance specifications
parameters
Type DM 502
Dc volts
Range:
0 to 1000 V in 5 ranges
0.1% of reading, 1 count
Accuracy:
Ac volts
Range:
0 to 500 V in 5 ranges
Accuracy: 40 Hz to 10 kHz, 0.5% of reading, 1 count
20 to 40 Hz and 10 to 20 kHz, 1.0% of reading,
1 count