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4 1/2 Digit Strain / Microvoltmeter
2002B-S & 3002-S

4 1/2 Digit Strain / Microvoltmeter
Programmable microvolt preamplifier
Isolated 10-24 Vdc bridge excitation supply
Independent bridge-balance, zero & span adjustments
±1,999 count display span
120 dB CMR, 70 dB NMR
Bright, 14.2 mm (0.56 in) LED display
Automatic zero and polarity
Display hold and test
115/230 Vac power
EMI/RFI filter for AC power
Screw-terminal barrier strip
Short (4.1 in, 104 mm deep) 1/8 DIN case

OPTIONS
Isolated 9-32 Vdc power
Isolated 26-56 Vdc power
NEMA-4 splash-proof lens cover


1 Year Warranty Electromagnetic Compatibility

Scroll Below to Order Specs Manuals Mechanical Mechanical

Model 2002B-S is a low-cost 4 1/2 digit (±19,999 count) panel meter for indication-only applications that require bridge excitation and resolution down to 1 µV. Zero, span and bridge-balance potentiometers are accessible behind the lens, so that the 2002B-S can be adjusted to read out directly in engineering units for a wide range of bridge inputs or other low-level signals. A ratiometric reference from the bridge excitation eliminates AC line and load regulation errors and reduces overall meter span tempco to 0.01% of reading/°C. Overall meter accuracy is 99.98% at 25°C.

The 2002B-S is housed in a short 4.1 in (104 mm) 1/8 DIN case to fit where space is limited. Power options include isolated 9-32 Vdc and 26-56 Vdc. A splash-proof lens cover which meets NEMA-4 requirements allows the 2002B to be used in harsh industrial environments.

Applications
The 2002B-S is ideal as a digital indicator for pressure cells and metal-foil load cells. It can also be used as a low-level, high-impedance process meter with zero and span adjustments or as a DC voltmeter with resolution down to 1 µV, as required by 50 mV current shunts.


Bridge Excitation Supply
The excitation supply is transformer-isolated to 500 V ac from the rest of the meter and provides up to 30 mA at 10 Vdc of output current. A multiturn potentiometer accessible behind the lens allows adjustment of output voltage from 10 to 24 Vdc.

Microvolt Preamplifier
The preamplifier provides an input resistance in excess of 1 G without bridge balance. Gains of 1, 10 and 100 are selectable by plug-in jumpers and provide meter resolutions of 100, 10 and 1 µV/count, respectively. Typical offset drift is only 0.3 µV/°C.
Load Cells

OMEGADYNE™ Load Cells
available from NEWPORT®
CLICK HERE FOR SELECTION GUIDE
SPECIFICATIONS

ANALOG INPUT
Range
±20 mV
±200 mV
±2 V
Resolution
1 µV/count
10 µV/count
100 µV/count
Preamplifier Gain
100
10
1
Input resistance: 1 Gohm without bridge balance
Bias current: 1 nA typ, 5 nA max
Gain attenuator: Adjustable from 0.001 to 1
Bridge-balance range: ±1.5 mV with 350 bridge
Zero-adjustment range: -19,999 to +19,999 counts
Span-adjustment range: 0 to 19,999 counts

REFERENCE
Configuration: Differential, ratiometric
Internal from excitation supply: 1.0 V with 9.5 kohm source resistance at 10 V excitation
External, optional: 1.0 V -50%/+100% with 680 kohm input resistance


ACCURACY AT 25°C
Maximum Error: ±0.01% of span ±2 counts
REFERENCE
INTERNAL
EXTERNAL
Bridge-Balance Tempco
±0.5 µV/°C
±1.0 µV/°C
Zero Tempco
±0.5 counts/°C
±1.0 count/°C
Span Tempco
±0.005% of span/°C
±0.01% of span/°C
Full-scale step response: 1 s
Warmup to rated accuracy: 10 min

NOISE REJECTION
NMR, SIG HI to SIG LO: 80 dB at 50/60 Hz for 20 mV range, 66 dB at 50/60 Hz for 200 mV and 2 V ranges
CMR, SIG GND to PWR GND: 120 dB, DC to 60 Hz
CMV, SIG GND to PWR GND: 1500 Vp per HV test, 354 Vp per IEC spacing

ANALOG-TO-DIGITAL CONVERSION
Technique: Dual-slope, average-value
Signal integration period: 100 ms
Read rate: 2.5/s

BRIDGE EXCITATION SUPPLY
Output voltage: Adjustable from 10 to 24 Vdc
Output current: 30 mA max at 10 Vdc decreasing to 12 mA max at 24 Vdc
Line regulation*: 0.01% typ, ±0.04% max for 10% change of AC power voltage
Load regulation*: ±0.15% typ, ±0.5% max from zero to max load
Ripple at 50/60 Hz: ±0.01%
Tempco: ±0.02%/°C
*The internal reference is derived from the excitation voltage for ratiometric operation. This eliminates load and line regulation errors and reduces other errors as indicated under accuracy at 25°C.

DISPLAY
Type: 7-segment, red LED
Height: 0.56 in (14.2 mm)
Symbols: -1.8.8.8.8
Decimal points: Four positions programmable by jumpers behind lens or at connector, sink 10 mA to SIG GND
Overrange indication: Four least-significant digits flash
DIGITAL SIGNALS
Input signals: Display hold, blanking, display test, decimal point select
Level, Input signals: TTL or 5 V CMOS compatible

POWER
AC voltages: 115 or 230 Vac ±15%
AC frequency: 49-440 Hz
DC voltages: 9-32 Vdc, isolated to 300 Vp; 26-56 Vdc, isolated to 300 Vp
Power consumption: 4.0 W nominal
Output Voltages: +4.7 Vdc and -4.7 Vdc ±5%, 10 mA max

ENVIRONMENTAL
Operating temperature: 0 to 60°C
Storage temperature: -40 to +85°C
Relative humidity: 95% at 45°C (non-condensing)

MECHANICAL
Dimensions: Newport DIN2A (1/8 DIN) case (see Mechanical section for drawings)
Weight: 15 oz (425 g)
Case material: 94V-0 UL-rated polycarbonate
Connector for signal, power and excitation: Screw-terminal barrier strip (standard)
Connector for display control lines: 36-pin PCB edge connector (optional)




Product Selection (Specify Model Number, see variations below in partnumber builder table)
 Part Number   Availability   Price    Description   
 STRAIN/MICROVOLT METER WITH EXCITATION OUTPUT
 2002B-S 1 Week    $320.00     4 1/2 digit (±19,999 count) strain microvolt meter,Default calibration: 0/100 mV = 00.00/100.00 and 10-24 V excitation set to 10 Vdc (SB2)  
 3002-S     Consult sales   with INFINITY® Style Bezel and Adapter. Default calibration: 0/100 mV = 00.00/100.00 and 10-24 V excitation set to 10 Vdc (SB2)  
 3002-S     Consult sales   4 1/2 digit (±19,999 count) strain/microvolt meter with INFINITY® Style Bezel and Adapter, Default calibration: 0/100 mV = 00.00/100.00 and 10-24 V excitation set to 10 Vdc  
 PROCESS RECEIVER
 2002B-P 1 Week    $280.00     4 1/2 digit (±19,999 count) process receiver. Default calibration: 4/20 mA = 00.00/100.00 (PB2)  
 3002-P     Consult sales   with INFINITY® Style Bezel and Adapter. Default calibration: 4/20 mA = 00.00/100.00 (PB2)  
 PROCESS RECEIVER WITH EXCITATION OUTPUT
 2002B-E 1 Week    $295.00     4 1/2 digit (±19,999 count) process receiver. Default calibration: 4/20 mA = 00.00/100.00 and 10-24 V excitation set to 24 Vdc (EB2)  
 3002-E     Consult sales   with INFINITY® Style Bezel and Adapter. Default calibration: 4/20 mA = 00.00/100.00 and 10-24 V excitation set to 24 Vdc (EB2)  
 
All dollar amounts on this site are shown in US currency.

 Part Number Builder
(1) (2) (3) (4) (5) (6)
Option Descriptions
(1) Model
  Select
2002B for Standard Model
3002 for Model with INFINITY® Style Bezel and Adapter
(2) INPUT CONFIGURATION
  Select
-S for Strain/Microvolt Meter with Excitation Output
-P for Process Receiver
-E for Process Receiver with Excitation Output
(3) POWER
  Select
Nothing(leave field blank) for 115 Vac, 50/60 Hz
,C1 for 230 Vac, 50/60 Hz
,C3C for Isolated 9-32 Vdc
,C3E for Isolated 26-56 Vdc
(4) DISPLAY OPTION
  Select
Nothing(leave field blank) for Red LED display
,G for Green LEDs for Display
(5) ADD-ON OPTIONS
  Select
Nothing(leave field blank) for No Options
,BL for Lens without Newport logo
(6) ADD-ON OPTIONS
  Select
Nothing(leave field blank) for No Options
,FS for Custom calibration for models 2002B-S/3002-S. Specify in millivolts for min/max input, min/max display, and excitation of 10-24 Vdc. $25
 NOTE: All combinations may not be valid, check spec sheet for valid part numbers.


   
Keywords: 4 1/2 Digit Strain / Microvoltmeter

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