TB 9-6625-011-35
IDENTIFICATION AND DESCRIPTION
1. Test Instrument
Identification.
This bulletin provides instructions for the
calibration of True RMS Voltmeter ME-318/U (Hewlett-Packard, Model 3400A).
TM 11-6625-1541-15 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. Variations among models are described in text.
b. Time and Technique. The time required for this calibration is approximately 1.5
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
Test instrument parameters
Performance specifications
Range: 1.0 mV to 300 V rms in 12 ranges
Ac voltage
Accuracy: (%) FS
Frequency:
10
to
50
Hz ................
5.0
50
Hz
to
1.0
MHz.............
1.0
1.0
to
2.0
MHz.............
2.0
2.0
to
3.0
MHz.............
3.0
3.0
to
10
MHz.............
5.0
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-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.