Model: 121A

Multiple Scale Meter

Properties:

Circuit Current For Which Designed
Dc
Overall Length
Between 2.469 inches and 2.656 inches
Center To Center Distance Between Mounting Facilities Parallel To Length
Between 3.590 inches and 3.610 inches
Center To Center Distance Between Mounting Facilities Parallel To Width
Between 3.280 inches and 3.300 inches
Overall Height
Between 3.938 inches and 4.000 inches
Overall Width
Between 4.250 inches and 4.500 inches
Mounting Hole Diameter
0.138 inches
Furnished Items And Quantity
Nut 6; washer 6
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Four hole/stud rectangular/square
Sensitivity Rating
1000.0 ohms per volt
Dial Scale Marking Color
Black single indicator all ranges
Accuracy In Percent
-2.0/+2.0 at full scale single indicator all ranges
Meter Depth Behind Mounting Flange
Between 1.063 inches and 1.125 inches
Meter Body Diameter Behind Mounting Flange
Between 3.240 inches and 3.260 inches
Movement Type
Moving iron vane
Background Color
White single indicator all ranges
Pointer Color
Red single indicator all ranges
Power Source
External
Mounting Facility Type And Quantity
4 screw and 4 unthreaded hole
Scale Graduation Type
Nonlinear single indicator all ranges
Measurement Range
+0.0/+1.0 milliwatts single indicator 2nd range
Measurement Range
+0.0/+3.0 milliwatts single indicator 3rd range
Measurement Range
-10.0/+0.0 decibels above or below one milliwatt single indicator 1st range
Scale Selection Method
Terminal
Features Provided
Magnetic shield and zero adjuster
Movement Suspension Method
Jewel pivot base
Circuit Attachment Method And Quantity
2 threaded stud
Material
Steel
Nuclear Hardness Critical Feature
Nonhardened
Surface Treatment
Paint
Special Test Features
Parts marked iaw mil-std-130
Style Designator
Rectangular flush mtg
Supplementary Features
Front molded bakelite
Fsc Application Data
Test set, elect. Equip.
NSN
6625-00-806-3993
Part Number
121A
Description
Meter,multiple Scale
CAGE
55026

An instrument with two or more different scales measuring different quantities, usually on a single calibrated dial or digital readout display. it is intended for visually monitoring an operation. the meter must be permanently connected into an appropriate electronic circuit. excludes: ammeter; voltmeter; wattmeter and meter, electrical frequency.

Part 121A NSN 6625-00-806-3993

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
62222
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:
0.8000lbs
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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