HP 3478A Technical Manual page 127

C-1. General
This appendix provides a summary of the maintenance operations for the Digital Multimeter, HP Model 3478A. It
authorizes categories of maintenance for specific maintenance functions on repairable items and components and the
tools and equipment required to perform each function. This appendix may be used as an aid in planning maintenance
operations.
D-2. Maintenance Function
Maintenance functions will be limited to and defined as follows:
a. Inspect. To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical
characteristics with established standards through examination.
b. Test. To verify serviceability and to detect incipient failure by measuring the mechanical or electrical characteristics
of an item and comparing those characteristics with prescribed standards.
c. Service. Operations required periodically to keep an item in proper operating conditions; ie., to clean
(decontaminate), to preserve, to drain, to paint, or to replenish fuel, lubricants, hydraulic fluids, or compressed air supplies.
d. Adjust. To maintain, within prescribed limits, by bringing into proper or exact position, or setting the operating
characteristics to specified parameters.
e. Align. To adjust specified variable elements of an item to bring about optimum or desired performance.
f. Calibrate. To determine and cause corrections to be made or to be adjusted in instruments or test measuring and
diagnostics equipments use in precision measurement. Consists of comparison of two instruments, one in which is a
certified standard of known accuracy of the instrument being compared.
APPENDIX D
MAINTENANCE ALLOCATION
Section 1. INTRODUCTION
D-1
TM 11-6625-3071-14