Model: AN/USM-644

Frequency Calibrator Set

Special Features:

Measures frequency & power; provides 110 vac, 400hz power outlet for the test sets; operating power requirements: 115 vac, 60hz, single phase, 30amps & 115 vac, 400hz, three phase (wye), 20amp/phase; mounting data: free-standing bench mounted rack w/cover removed; material: steel/aluminum fiberglass case; type of installation: designed for fixed ground or shipboard test bench use

Properties:

End Application
4920-01-324-3591dq & an/usm-406c
Unpackaged Unit Length
24.000 inches
Unpackaged Unit Width
30.250 inches
Unpackaged Unit Height
31.410 inches
Supply Items And Quantities
6625-01-203-0541 power meter 1; 6680-01-321-0068 counter, electronic, digital readout 1; 6625-01-343-5134 frequency counter 1
Nonsupply Items And Quantities
Accessory drawer 1; connector panel 2; hp drawer 1; ieee buss 1; tnc connector 1; bnc connector 2; 115/120 vac plug in 2; 404-c power connector 1; on off switch 1
End Item Source
80058
Joint Electronics Type Designation System Item Type Number
An/usm-644
Usage Design
Provides the capability to calibrate, maintain & troubleshoot the an/usm-406c & an/usm-639 test sets
Container Type
Case
End Item Name
Test set, electronic countermeasures
Unpackaged Unit Weight
95.000 pounds
NSN
6625-01-369-1180
Part Number
AN/USM-644
Description
Calibrator Set,frequency
CAGE
80058

A fixed number of components and/or items, not all having the same basic name, which are required for the generation of one or more fixed frequencies that are used to determine by comparison the frequency(ies) derived from other sources. See also frequency meter.

Part AN/USM-644 NSN 6625-01-369-1180

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16415
FIIG:
A23800
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
P
PMIC:
A
ESD:
ESD:
MMAC:
KV
CRITL:
N

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
100.0
WCC:
72D
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 9030908030
  • SITC: 87479
  • End Use: Measuring, testing, control instruments
  • NAICS: 334515
  • USDA: 1

Freight Class: Parts and accessories of articles of schedule b subheading 9030.39

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