Model: 253R0-828

Electrical Frequency Meter

Special Features:

Weapon system essential

Properties:

Circuit Current For Which Designed
Ac
Dielectric Withstanding Voltage In Volts
3000.0
Overall Length
2.100 inches
Mounting Hole Diameter
0.125 inches
Scale Division Quantity
20 single indicator single range
Frequency Rating
400.0 hertz
Overall Diameter
2.695 inches
Environmental Protection
Shock resistant and vibration resistant and watertight
Mounting Bolt Circle Diameter
2.440 inches
End Application
Aircraft fms-ta-4j, c-2 (reprocured) , tomcat f-14, viking s-3b, helicopter mh-53e, sh-60f, hh-60h, sea king h-3, advance attack ah-1w, uscg search and rescue hh-60j
Furnished Items And Quantity
Mtg hdw 3; term. Hdw 2
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Frequency Response Range
+390.000 to 410.000 hertz
Dial Scale Marking Color
Black single indicator single range
Accuracy In Percent
-5.0 to 5.0 at full scale single indicator single range
Meter Depth Behind Mounting Flange
1.700 inches
Meter Body Diameter Behind Mounting Flange
2.210 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
+390.0 to 410.0 hertz single indicator single range
Scale Selection Method
Terminal
Features Provided
Zero adjuster
Criticality Code Justification
Feat
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 solder lug
Phase
Single
Material
Steel
Surface Treatment
Enamel
Special Test Features
Conforms to mil-m-10304
Style Designator
C1 round flush mtg
Fsc Application Data
Test set, elect. Equip.
NSN
6625-01-044-2560
Part Number
253R0-828
Description
Meter,electrical Frequency
CAGE
89280

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 253R0-828 NSN 6625-01-044-2560

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:
CRITL:
Y

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
4.0 X 4.0 X 4.0
Paclk Weight:
0.4000lbs
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:
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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