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SECTION II. BASIC ISSUE ITEMS		Up
TM-11-6625-599-12 Voltmeter Electronic AN/ USM-98A Manual		Next
Figure 1. Voltmeter, Electronic AN/USM-98A, less tow-prong adapter and technical manuals.

TM 11-6625-599-12
Paragraph
Page
C HAPTER 1. INTRODUCTION
Section I. General
1-1
5
Scope ------------------------------------------------------------------------------------
1-2
5
Index of equipment publications ----------------------------------------------------
5
Forms and records ------------------------------------------------------------------------- 1­3
II. Description and data
5
Purpose and use ---------------------------------------------------------------------------------------------------------- 1-4
5
Technical characteristics -------------------------------------------------------------------------------------------- 1-5
6
Components of Voltmeter, Electronic AN/USM-98A ----------------------------------------------- 1-6
CHAPTER 2. INSTALLATION AND OPERATING INSTRUCTIONS
SECTION I. Service upon receipt of equipment
2­1
9
--------------------------------------------------------------------------
Unpacking
9
Checking  unpacked  equipment  ---------------------------------------------  2-2
II. Operator's controls and indicators, and operation under usual conditions
9
Voltmeter, Electronic AN/USM-98A operating controls and indicators ----------------- 2­3
12
Types  of  operation  --------------------------------------------------------------------------  2­4
12
Starting
procedure
-----------------------------------------------------------------------------
2­5
13
Vacuum-tube voltmeter operation ----------------------------------------------------- 2-6
13
Differential voltmeter operation -------------------------------------------------------- 2­7
14
Observing  voltage  excursions  -------------------------------------------------------------  2­8
15
Recording  voltage  excursions  -------------------------------------------------------------  2­9
15
Measuring high resistance ------------------------------------------------------------------
10
CHAPTER 3. MAINTENANCE INSTRUCTIONS
17
Scope
of
maintenance
-----------------------------------------------------------------------
3­1
17
Preventive
maintenance
------------------------------------------------------------------------
3­2
17
P r e v e n t i v e maintenance checks and services periods -------------------------- 3-3
17
Daily  preventive  maintenance  checks  and  services  chart  -------------------------  3-4
18
Weekly  preventive  maintenance  checks  and  services  chart  -------------------------  3-5
18
Monthly preventive maintenance checks and services chart --------------------------- 3-6
18
Quarterly preventivem maintenance checks and services chart -------------------------- 3-7
19
Cleaning  -------------------------------------------------------------------------------------------  3­8
19
Touchup  painting  instructions  ------------------------------------------------------------------  3­9
19
Visual
inspection
----------------------------------------------------------------------------------
8-10
20
Equipment performance checklist ------------------------------------------------------------- 3-11
20
Replacement
of
fuse
--------------------------------------------------------------------------
3-I2
20
Replacement  of  tubes  ---------------------------------------------------------------------------  3-13
Replacement of decimal point indicator lamp --------------------------------------------- 3­14
21
CHAPTER 4. SHIPMENT, LIMITED STORAGE, AND DEMOLITION TO
PREVENT ENEMY USE
Section  I. Shipment and limited storage
Disassembly  of  equipment  --------------------------------------------------------------------  4-1
23
23
Repackaging  for  shipment  or  limited  storage  ------------------------------------------  4-2
Handling, storage, and disposal of radioactive material ---------------------------------- 4­3
23
II. Demolition of materiel to prevent enemy use
Authority for demolition -------------------------------------------------------------------------
4­4
23
Methods  of  destruction  --------------------------------------------------------------------------  4-5
23
25
APPENDIX   I.  REFERENCES ---------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------
26
II. MAINTENANCE ALLOCATION ----------------------------------------------------------------------------------------------------------------------------------------------------------------
III. BASIC ISSUE ITEMS LIST ---------------------------------------------------------------------------------------------------------------------
30
GLOSSARY
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
32
3

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