SECTION I IDENTIFICATION AND DESCRIPTION

TB 9-6625-2326-35

SECTION I

IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification.

This bulletin provides instructions for the

calibration of Digital Multimeter, ISAS, Model DM224. The manufacturer's manual was

used as the prime data source 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 1

hour, 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 that pertain

to this calibration are in table 1.

Table 1. Calibration Description

Test instrument

parameters

Performance specifications

Dc voltage

Range: 0.2 to 200 V

Accuracy: 1% of range

Ac voltage

Range: 0.2 to 200 V

Accuracy: 3% of range

Range: 0 to 20 MΩ

Accuracy: 1% of range

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 Set AN/GSM-286 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-