Model: 321-HR

Null Meter

Special Features:

Ruggedized

Properties:

Circuit Current For Which Designed
Dc
Dielectric Withstanding Voltage In Volts
1500.0
Reliability Indicator
Established
Overall Length
2.562 inches
Mounting Hole Diameter
0.150 inches
Scale Division Quantity
20 single indicator all ranges
Overall Diameter
3.510 inches
Environmental Protection
Shock resistant and vibration resistant
Mounting Bolt Circle Diameter
3.160 inches
Furnished Items And Quantity
Nut 5; washer 7
Indicator Type
Dial w/pointer
Installation Design
Panel
Mounting Arrangement Style
Three hole/stud bolt circle
Sensitivity Rating
50.0 microamperes
Dial Scale Marking Color
Black single indicator all ranges
Accuracy In Percent
-2.0/+2.0 at full scale single indicator all ranges
Accuracy In Percent
-2.0 to 2.0 at full scale single indicator all ranges
Unable To Decode
Unable to decode or unable to decode
Meter Depth Behind Mounting Flange
1.281 inches
Meter Body Diameter Behind Mounting Flange
2.800 inches
Movement Type
Moving coil, permanent magnet
Background Color
White single indicator all ranges
Pointer Color
Black single indicator all ranges
Scale Marking
Top scale: -100; -50; 0; 50; 100; bottom scale: -10; -5; 0; 5; 10: error in millivolts milliseconds
Mounting Facility Type And Quantity
3 unthreaded hole
Scale Graduation Type
Linear single indicator all ranges
Features Provided
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
Enamel
Style Designator
Round flush mtg
Fsc Application Data
Electrical and electronic properties measuring and testing instruments
NSN
6625-00-115-9344
Part Number
321-HR
Description
Meter,null
CAGE
60741

An electrically operated instrument having a zero point on its scale (usually located in the center thereof). It may not indicate units of electrical measurement. The value may be expressed by means of a pointer and calibrated dial or a digital readout display. When the indication shows zero, an electrical value of "zero" has been reached in the circuit. It is generally used in situations in which zero is the desired effect. Excludes ammeter, galvanometer; meter, arbitary scale; and voltmeter.

Part 321-HR NSN 6625-00-115-9344

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
61382
FIIG:
A310A0
Concept No.:
App. Key:
C
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:
0.1000lbs
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:
Construction Materials

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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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