Model: 643

Ammeter

Properties:

Circuit Current For Which Designed
Dc
Mounting Hole Diameter
0.188 inches
Scale Division Quantity
50 single indicator single range
Overall Diameter
4.375 inches
Mounting Bolt Circle Diameter
4.000 inches
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Sensitivity Rating
50.0 millivolts
Dial Scale Marking Color
Black single indicator single range
Accuracy In Percent
-1.0/+1.0 at full scale single indicator single range
Meter Depth Behind Mounting Flange
1.453 inches
Meter Body Diameter Behind Mounting Flange
3.562 inches
Movement Type
Moving coil, permanent magnet
Background Color
White single indicator single range
Mounting Facility Type And Quantity
3 unthreaded hole
Measurement Range
-25.0/+25.0 microamperes, dc single indicator single range
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 threaded stud
Style Designator
C1 round flush mtg
Style Designator
Round flush mtg
Reference Number Differentiating Characteristics
As differentiated by the name, circuit current, measurement range, and step quantity requirements
NSN
6625-00-080-6920
Part Number
643
Description
Ammeter
CAGE
65092

An instrument which measures electric current and is calibrated and marked in amperes or any multiple and/or submultiple thereof. The value may be expressed by means of a pointer and calibrated dial or a digital readout display. For current detecting type of devices, see galvanometer.

Part 643 NSN 6625-00-080-6920

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16450
FIIG:
A310A0
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
136740
UFC:
68820
LTL:
RATING VARIABLE
LCL:
100.0
WCC:
657
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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