SUMMARY

The important points of this chapter are summarized in the following paragraphs:

The JETDS SYSTEM is jointly used by all branches of the military to identify equipments by a system of standardized nomenclatures.

GPETE is test equipment that has the capability, without modifications, to generate, modify, or measure a range of parameters of electronic functions required to test two or more equipments or systems of basically different design. All GPETE are listed in

Standard General Purpose Electronic Test Equipment, MIL-STD-1364 (series).

SPETE is test equipment that is specifically designed to generate, modify, or measure a range of parameters of electronic functions of a specific or peculiar nature required to test a single equipment or system.

The SHIP CONFIGURATION AND LOGISTICS INFORMATION SYSTEM (SCLSIS) program is designed to keep track of equipment configuration changes in the fleet.

The SCLSIS program has two basic elements, VALIDATION and INVENTORY UPDATING.

The CALIBRATION STATUS of any items of test equipment can be determined by the information recorded on the calibration label or tag located on the equipment.

The CALIBRATED label, with black lettering on a white background, indicates the instrument to which it is attached is within tolerance on all scales.

The CALIBRATED - REFER TO REPORT label, with red lettering on a white background, is used when actual measurement values must be known to use the instrument.

The SPECIAL CALIBRATION label, with black lettering on a yellow background, is used when some unusual or special condition in the calibration should be drawn to your attention.

The USER CALIBRATION label indicates that you should calibrate the test and measuring instrument instead of sending the instrument to a calibration facility.

The INACTIVE - CALIBRATE BEFORE USE label is used when a piece of test equipment due for recalibration will not be used for some time in the future.

The CALIBRATION NOT REQUIRED label is used on test instruments listed in the Metrology Requirements List (METRL) as not requiring calibration.

The REJECTED label is attached to a test instrument that fails to meet the acceptance criteria during calibration and cannot be repaired.

The CALIBRATION VOID IF SEAL BROKEN label is placed over readily accessible adjustments to prevent tampering by the user when such tampering could affect the calibration.

The MEASURE system is designed to standardize the recall and scheduling of test, measurement, and diagnostic equipment into calibration facilities and for the documentation of actions performed by the calibration facility.

MAINTENANCE is work done to correct, reduce, or counteract wear and damage to equipment.

PREVENTIVE MAINTENANCE consists of checks to determine weather equipment is functioning properly. It also consists of visual inspections of cabling and equipment for damage and to determine if lubrication is needed.

CORRECTIVE MAINTENANCE is used to isolate troubles by means of test techniques and practices that realign or readjust equipment or otherwise bring the equipment back up to proper performance.

SENSITIVITY of the voltmeter is always given on the voltage charts for a particular piece of equipment. You should always use a voltmeter of similar sensitivity to the equipment to diminish the effects of circuit loading.

CURRENT MEASUREMENTS are not often taken in the course of testing because the ammeter (or other current measuring device) must become an actual part of the equipment being tested. The circuit must be opened for necessary connection of the meter. Usually you can use a voltage measurement to calculate the circuit current by applying Ohm's law.

You should observe the following PRECAUTIONS when using an ohmmeter:

1. The circuit being tested must be completely de-energized.
2. Any circuit components which can be damaged by ohmmeter current must be removed before any measurement is made.

The WHEATSTONE BRIDGE is used for precise measurement of resistance.

The CAPACITANCE BRIDGE is used for measuring an unknown capacitance.

An INDUCTANCE BRIDGE is used to find the value of an unknown inductance.