Model #638-13495

Electrical frequency meter (NSN 6625-00-869-8734)

Special Features
Ruggedized
Description

4.400 inches maximum overall length, steel material.

Circuit Current For Which Designed
Dc
Mounting Hole Diameter
0.112 inches
Scale Division Quantity
2 single indicator single range
Overall Diameter
3.510 inches
Environmental Protection
Humidity resistant and shock resistant and vibration resistant
Mounting Bolt Circle Diameter
Between 3.150 inches and 3.170 inches
Furnished Items And Quantity
Nut 7; washer 9
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Dial Scale Marking Color
Black single indicator single range
Accuracy In Percent
-2.0/+2.0 at full scale single indicator single range
Meter Depth Behind Mounting Flange
3.250 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 screw and 3 unthreaded hole
Scale Graduation Type
Linear single indicator single range
Measurement Range
+380.0/+420.0 hertz single indicator single range
Features Provided
Zero adjuster
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 threaded stud
Nuclear Hardness Critical Feature
Nonhardened
Special Test Features
Stamp iaw mil-std-103
Style Designator
Round flush mtg
Supplementary Features
Line voltage 105.0 to 130.0 vac; power consumption 3 va max
Fsc Application Data
Test set, elect. Equip.
Description
Meter,electrical Frequency
Cage Code
77221

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Updated: 11/24/2024