Model: 291B99A10

Electrical Frequency Meter

Special Features:

Ruggedized; sealed

Properties:

Circuit Current For Which Designed
Ac
Dielectric Withstanding Voltage In Volts
3000.0
Overall Length
4.468 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
3.406 inches
Center To Center Distance Between Mounting Facilities Parallel To Width
3.406 inches
Overall Height
4.531 inches
Overall Width
4.468 inches
Frequency Rating
60.0 hertz
Mounting Stud Length
0.593 inches
Environmental Protection
Airtight and dust resistant and fungus resistant and heat resistant and humidity resistant and shock resistant and vibration resistant and water resistant
Furnished Items And Quantity
Nut 4; lockwasher 4; seal 1
Indicator Type
Vibrating reed
Installation Design
Panel
Register Quantity
2
Mounting Arrangement Style
Four hole/stud rectangular/square
Sensitivity Rating
150.0 volts
Dial Scale Marking Color
Black single indicator single range
Resonant Reed Quantity
21
Meter Depth Behind Mounting Flange
3.531 inches
Meter Body Diameter Behind Mounting Flange
3.656 inches
Movement Type
Vibrating reed
Background Color
White single indicator single range
Power Source
External
Mounting Facility Type And Quantity
4 threaded stud
Measurement Range
+55.0/+65.0 hertz single indicator single range
Measurement Range
+55.0 to 65.0 hertz single indicator single range
Mounting Stud Diameter
0.250 inches
Scale Selection Method
Terminal
Features Provided
Magnetic shield
Circuit Attachment Method And Quantity
2 solder lug
Operating Voltage Rating In Volts
Between 100.0 ac and 150.0 ac
Special Markings
On back, sealed do not open; calibrated with scale vertical
Material
Steel
Nuclear Hardness Critical Feature
Nonhardened
Surface Treatment
Cadmium and chromate
Special Test Features
Complies with mil-m-10304
Style Designator
Rectangular flush mtg
Fsc Application Data
Test set, elect. Equip.
NSN
6625-00-648-9123
Part Number
291B99A10
Description
Meter,electrical Frequency
CAGE
79500

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 291B99A10 NSN 6625-00-648-9123

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:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
2.6000lbs
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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