IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of micro-ohmmeter AEMC Instruments, model 6250. 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 2
hour, using the dc and low frequency technique.
2. Forms, Records, and Reports. Forms, records and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Test Instrument Parameters
Accuracy: ±0.05% +1.0 μ
Accuracy: ±0.05% +3 μ
Accuracy: ±0.05% +30 μ
Accuracy: ±0.05% +0.3 m
Accuracy: ±0.05% +3 m
Accuracy: ±0.05% +30 m
Accuracy: ±0.05% +300 m
-10 șC to 130 șC
Accuracy: ±0.5 șC
4. Equipment Required. Table 2 identifies the specific equipment to be used in the
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; AN/GSM-287; or AN/GSM-440. Alternate items may be used
by the calibrating activity when the equipment listed in table 2 is not available. 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.