Model: 551

Audio Level Meter

Special Features:

Ruggedized

Properties:

Circuit Current For Which Designed
Dc
Dielectric Withstanding Voltage In Volts
3000.0
Overall Length
2.312 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
4.000 inches
Center To Center Distance Between Mounting Facilities Parallel To Width
3.562 inches
Overall Height
4.167 inches
Overall Width
4.645 inches
Mounting Stud Length
0.513 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 6; lockwasher 6; shunt wire 1; seal 1
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Four hole/stud rectangular/square
Sensitivity Rating
75.0 milliamperes
Dial Scale Marking Color
Black single indicator all ranges and red single indicator all ranges
Accuracy In Percent
-2.0/+2.0 at full scale single indicator all ranges
Meter Depth Behind Mounting Flange
0.949 inches
Meter Body Diameter Behind Mounting Flange
2.722 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
4 threaded stud
Scale Graduation Type
Nonlinear single indicator all ranges
Measurement Range
+0.0/+100.0 decibels single indicator 1st range
Measurement Range
-20.0/+3.0 voice units single indicator 2nd range
Mounting Stud Diameter
0.135 inches
Scale Selection Method
Terminal
Features Provided
Self-illumination facility
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 threaded stud
Special Markings
On front, made in usa
Material
Plastic phenol-formaldehyde
Nuclear Hardness Critical Feature
Nonhardened
Surface Treatment
Paint
Special Test Features
Complies with mil-m-10304
Style Designator
Rectangular flush mtg
Fsc Application Data
Test set, elect. Equip.
NSN
6625-00-851-6064
Part Number
551
Description
Meter,audio Level
CAGE
33005

An instrument which measures the ratio of electrical power with reference to a predetermined value and is calibrated in units of sound intensity, usually decibels. The value may be expressed by means of a pointer and calibrated dial or a digital readout display. if other than audio frequency ranges, see meter, noise level.

Part 551 NSN 6625-00-851-6064

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16456
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:
1.2000lbs
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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