Model: 638

Voltmeter

Properties:

Circuit Current For Which Designed
Ac
Dielectric Withstanding Voltage In Volts
2500.0
Overall Length
2.128 inches
Mounting Hole Diameter
Between 0.143 inches and 0.157 inches
Scale Division Quantity
50 single indicator 2nd range
Scale Division Quantity
60 single indicator 1st range
Overall Diameter
3.500 inches
Environmental Protection
Cold resistant and heat resistant
Mounting Bolt Circle Diameter
3.160 inches
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Sensitivity Rating
200.0 microamperes
Dial Scale Marking Color
Black single indicator all ranges
Accuracy In Percent
-2.0/+2.0 at full scale single indicator all ranges
Accuracy In Percent
-2.0 to 2.0 at full scale single indicator all ranges
Unable To Decode
Unable to decode or unable to decode
Meter Depth Behind Mounting Flange
1.438 inches
Meter Body Diameter Behind Mounting Flange
2.690 inches
Movement Type
Moving coil, permanent magnet
Background Color
White single indicator all ranges
Pointer Color
Black single indicator all ranges
Power Source
External
Mounting Facility Type And Quantity
3 unthreaded hole
Scale Graduation Type
Linear single indicator all ranges
Measurement Range
+0.0/+10.0 volts, ac single indicator 2nd range
Measurement Range
+0.0/+3.0 volts, ac single indicator 1st range
Measurement Range
+0.0 to 10.0 volts, ac single indicator 2nd range
Measurement Range
+0.0 to 3.0 volts, ac single indicator 1st range
Scale Selection Method
Terminal
Features Provided
Knife edge pointer and zero adjuster
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 solder lug
Nuclear Hardness Critical Feature
Nonhardened
Surface Treatment
Enamel semigloss
Surface Treatment Specification
595 federal standard single treatment response
Style Designator
Round flush mtg
Fsc Application Data
Test set, electronic equipment
NSN
6625-00-728-3183
Part Number
638
Description
Voltmeter
CAGE
77221

An instrument which measures electrical potential and is calibrated in volts 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.

Part 638 NSN 6625-00-728-3183

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16449
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:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
136740
UFC:
68820
LTL:
RATING VARIABLE
LCL:
--
WCC:
657
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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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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