Model: 638-18049

Electrical Frequency Meter

Special Features:

Ruggedized; weapon system essential

Properties:

Circuit Current For Which Designed
Ac
Dielectric Withstanding Voltage In Volts
3000.0
Overall Length
2.850 inches
Scale Division Quantity
20 single indicator single range
Frequency Rating
60.0 hertz
Mounting Stud Length
0.500 inches
Overall Diameter
3.510 inches
Environmental Protection
Shock resistant and vibration resistant
Mounting Bolt Circle Diameter
3.160 inches
End Application
Aircraft, awacs, e-3a, shipboard material handling equipment (mhe), safeguard class ars, sealift support facilities program (ssfp) equipment, consolidated ground support equipment, generator, 5kw, tqg, tactical quiet family, generator, 10kw, tqg, tactical quiet family, generator set, 10kw, 60 hz, skid-mounted (2id) (mep-0003a)
Furnished Items And Quantity
Mtg hdw 2; term. Hdw 3
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Frequency Response Range
+55.000 to 65.000 hertz
Sensitivity Rating
200.0 microamperes
Dial Scale Marking Color
Black single indicator single range
Accuracy In Percent
-2.0 to 2.0 at full scale single indicator single range
Meter Depth Behind Mounting Flange
2.450 inches
Meter Body Diameter Behind Mounting Flange
2.800 inches
Movement Type
Moving coil, permanent magnet
Background Color
White single indicator single range
Pointer Color
Black single indicator single range
Power Source
External
Mounting Facility Type And Quantity
3 threaded stud
Scale Graduation Type
Linear single indicator single range
Measurement Range
+55.0 to 65.0 hertz single indicator single range
Mounting Stud Diameter
0.138 inches
Features Provided
Magnetic shield and zero adjuster
Criticality Code Justification
Feat
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 threaded stud
Operating Voltage Rating In Volts
120.0 ac
Phase
Single
Special Markings
Double width red mark at 60 hertz
Material
Steel
Surface Treatment
Enamel semigloss
Style Designator
C1 round flush mtg
Fsc Application Data
Test set, elect. Equip.
NSN
6625-01-038-6869
Part Number
638-18049
Description
Meter,electrical Frequency
CAGE
77221

An instrument which measures the rate of regularly recurring variations in an electric current or voltage and is usually calibrated in hertz (cycles per second or cps). The value may be expressed by means of a pointer and calibrated dial vibrating reed or a digital read out display. For instruments which measure radio frequencies, see calibrator, frequency; and wavementer. excludes: counter electronic digital.

Part 638-18049 NSN 6625-01-038-6869

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16454
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:
TG
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
4.0 X 5.0 X 5.0
Paclk Weight:
0.7000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
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:
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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