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3 3/4 Digit DC Voltmeter with BCD Output
204B

3 3/4 Digit DC Voltmeter with BCD Output
Parallel BCD output
±3,999-count display span
±40 mV to ±400 V dc ranges
3-wire ratio input
1500 Vp CMV, 120 dB CMR
Bright, 0.56 in (14.2 mm) LED display
Automatic zero and polarity
115/230 V ac power
1/8 DIN case

OPTIONS
±4,999-count display span
±5,999-count display span
High-impedance 3-wire ratio input
Isolated, stored, three-state parallel BCD
Digital setpoint controller
Digital peak or valley hold
0.5 mV/count analog output
5 V dc power
Isolated 9-32 V dc power
Isolated 26-56 V dc power
Screw-terminal barrier strip
NEMA-4 splash-proof lens cover
NEMA-size case






In its base configuration, Model 204B is a high-accuracy ±3,999-count DC voltmeter which fills the gap between 3 1/2 and 4 1/2 digit resolution. The most sensitive standard input range is ±39.99 mV full-scale and provides 10 µV resolution. Extended-range options are available to ±4,999 and ±5,999 counts. Accuracy is 99.95% of reading.

BCD OUTPUT STANDARD
Unbuffered, non-isolated parallel BCD output is a standard feature of the 204B and is implemented on the main circuit board. It is good for about 1 feet and can be used to interface the 204B to a comparator (Model 872A) or a printer (Model 820A). Additional data and control outputs can be provided by an optional upper board.

OPTIONS

05 Option

The 05 Option provides a DC signal proportional to the display to drive an X-Y recorder or strip-chart recorder.
The meter main assembly can be electrically configured for five input ranges, four display spans, a dummy right-hand zero, high-impedance 3-wire ratio input, extended zero adjustment, and optical isolation between analog and digital grounds. Upper-board options include four BCD output boards, linearized 0.5 mV/count analog output, and a single setpoint controller. Mechanical options for the standard 1/8 DIN case include a screw-terminal barrier strip for signal and power and a splash-proof lens cover which meets NEMA-4 requirements. A NEMA-size case is optional. For additional information, please refer to the Options and Mechanical sections.

LA2 (Low Tempco)
Load-Cell Conditioner Upper Board

LP2 (Low Tempco)

Load-Cell Peak-Hold Upper Board

OPTION F3A
Non-Isolated Parallel BCD Upper Board, Three-State with 1-Bit Enable

OPTION F3P
Peak/Valley Detector Upper Board with BCD Output

OPTION F4A
Isolated Parallel BCD Upper Board, Three-State with 1-Bit Enable

OPTION F4M
Isolated, Parallel BCD Upper Board Three-State with 4-Bit Address

OPTION 05
Analog-Output Upper Board

OPTION 06
Digital-Setpoint Upper Board


OPTION SPC4
1/8 DIN NEMA-4 Splash-Proof Lens Cover

SPECIFICATIONS

ANALOG INPUT
Signal Range
±39.99 mV
±399.9 mV
Resolution
10 µV
100 µV
Input resistance
1 Gohm
1 Gohm
Bias current
1 nA
1 nA
Maximum input
100 Vp
100 Vp

Signal Range
±3.999 mV
±39.99 mV
±399.9 mV
Resolution
1 mV
10 mV
100 mV
Input resistance
1 Gohm
1.1 Mohm
1.0 Mohm
Bias current
1 nA
100 pA
10 pA
Maximum input
100 Vp
250 Vp
500 Vp

NOISE REJECTION
NMR:
40 dB, 50/60 Hz
CMR: 120 dB, DC to 60 Hz
CMV: 1500 Vp per HV test, 354 Vp per IEC spacing

ACCURACY AT 25°C
Maximum error:
±0.02% of reading ±1 count
Span tempco, 4V range: ±0.005% of reading/°C
Span tempco, other ranges:
±0.01% of reading ±1 count
Step response: 1 s
Warmup to rated accuracy: 1 hour

ANALOG-TO-DIGITAL CONVERSION
Technique:
Dual-slope, average value
Polarity: Automatic
Signal integration period:
50 ms at 60 Hz, 40 ms at 50 Hz
Read rate: 3.6/s at full scale

3-WIRE RATIO REFERENCE
Input range
±40 mV
±400 mV
±4, ±40, ±400 V
Reference Voltage
+0.01 to +0.08V
+0.1 to +0.8 V
+1.0 to +3.5 V
Load on reference, std
47 ohm
471 ohm
4.72 kohm
Load on reference, opt
100 Mohm
100 Mohm
100 Mohm
Accuracy w/100 Mohm
99.8% ±0.2%
99.8% ±0.2%
99.8% ±0.2%

DISPLAY
Type:
7-segment, red LED
Height: 0.56 in (14.2 mm)
Symbols: ­8.8.8.8
Decimal points: Three positions internally or at connector
Overrange indication: Display flashes

DIGITAL INPUTS
Output signals:
TTL-compatible
HOLD input: TTL or 5 V CMOS compatible
BLANKING input: Open-collector compatible

POWER
AC voltages:
115 V ac ±10% at 60 Hz; 230 V ac ±10% at 50 Hz
DC voltages: 5 V dc ±5%, non-isolated; 9-32 V dc, isolated to 300 Vp; 26-56 V dc, isolated to 300 Vp
Power consumption: 5 W nominal

ENVIRONMENTAL
Operating temperature:
0 to 50°C
Storage temperature: ­40 to +75°C
Relative humidity: 95% at 40°C (non-condensing)

MECHANICAL
Dimensions:
Newport DIN1A (1/8 DIN) case standard, Newport NEMA-size case optional (see Mechanical section for drawings)
Weight: 17 oz (480 g)
Case material: 94V-0 UL-rated polycarbonate



Product Selection (Specify Model Number, see variations below in partnumber builder table)
 Part Number   Availability   Price    Description   
 204B-1 in-stock    $390.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 39.99 mVdc  
 204B-2 in-stock    $375.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 399.9 mVdc  
 204B-3 in-stock    $375.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 3.999 Vdc  
 204B-4 in-stock    $385.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 39.99 Vdc  
 204B-5 in-stock    $385.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 399.9 Vdc  
 With optional crew-terminal barrier strip for power and signal (removes these inputs from PCB edge connector). D4 Option required for CE
 204B-1,D4 in-stock    $406.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 39.99 mVdc with screw-terminal barrier strip for power and signal  
 204B-2,D4 in-stock    $391.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 399.9 mVdc with screw-terminal barrier strip for power and signal  
 204B-3,D4 in-stock    $391.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 3.999 Vdc with screw-terminal barrier strip for power and signal  
 204B-5,D4 in-stock    $401.00     3 3 /4 digit (± 3,999 count) voltmeter with ± 399.9 Vdc with screw-terminal barrier strip for power and signal  
 
All dollar amounts on this site are shown in US currency.

 Ordering Example: (1) 204B-AVG,VR4 $325 + 155 = $530
 Part Number Builder
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)
2
2
0
0
4
4
B
B
Option Descriptions
(1) INPUT SIGNAL
  Select
-1 for ± 39.99 mVdc
-2 for ± 399.9 mVdc
-3 for ± 3.999 Vdc
-4 for ± 39.99 Vdc
-5 for ± 399.9 Vdc
-AVG for AC voltage (includes D4 connector)
-RMS for True-RMS voltage (includes D4 connector)
-LA2 for Gain-programmable preamplifier with active filter and bridge excitation
-LP2 for Gain-programmable preamplifier with peak hold and bridge-excitation - DC Input Signals
(2) AVG or RMS INPUT SIGNALS (Not applicable for LA2, LP2 or -FS Input Signals)
  Select
Nothing(leave field blank) for Not applicable
,VR1 for 39.99 mV ac or rms
,VR2 for 399.9 mV ac or rms
,VR3 for 3.999 Vac or rms
,VR4 for 39.99 Vac or rms
,VR5 for 399.9 Vac or rms
,CR1 for 39.99 µA ac or rms
,CR2 for 399.9 µA ac or rms
,CR3 for 3.999 mA ac or rms
,CR4 for 39.99 mA ac or rms
,CR5 for 399.9 mA ac or rms
,CR6 for 3.999 A ac or rms
,CR7 for Current transformer (CT) scaling for 5 A ac or rms
(3) DISPLAY RANGE OPTION
  Select
Nothing(leave field blank) for ±3,999 counts (standard)
,ER1 for ±4,999 counts (DC input signal only)
,ER2 for ±5,999 counts (DC input signal only)
(4) ZERO-OFFSET ADJUSTMENT
  Select
Nothing(leave field blank) for Standard (±0.35% of span)
,ZO for Extended (±10% of span) not available with FS
(5) OPTICAL ISOLATION
  Select
Nothing(leave field blank) for None (analog and digital grounds are tied together)
,OI for Optical isolation between analog and digital grounds. Mutually exclusive with input option LP2
(6) 3-WIRE RATIO INPUT IMPEDANCE
  Select
Nothing(leave field blank) for Standard
,HZ for High-impedance (100 Mohm reference input only)
(7) UPPER-BOARD OUTPUT OPTIONS - Mutually exclusive with options LA2 and LP2 - *Includes PCB edge connector
  Select
Nothing(leave field blank) for None (unbuffered, non-isolated BCD is standard)*
,F3A for Buffered, gated and stored parallel BCD output*
,F3P for Buffered and stored parallel BCD with peak or valley hold*
,F4A for Buffered, isolated, gated, and stored parallel BCD*
,F4M for F4A with 4-line binary addressing*
,05 for Linearized analog output of 0.5 mV/count for use with AC powered units only. D1, D3, D4 required**
,06 for Single-setpoint controller with TTL and reed-relay outputs (programmed by customer at rear connector)**
,0506 for Both 05 and 06 output options for use with AC powered units only. D4 required*
(8) POWER
  Select
Nothing(leave field blank) for 115 Vac, 50/60 Hz
,C1 for 230 Vac, 50/60 Hz
,C3 for 5 Vdc (optimized for 60 Hz rejection)
,C4 for 5 Vdc (optimized for 50 Hz rejection)
,C3B for Isolated 9-32 Vdc (optimized for 60 Hz rejection)
,C4B for Isolated 9-32 Vdc (optimized for 50 Hz rejection)
,C3D for Isolated 26-56 Vdc (optimized for 60 Hz rejection)
,C4D for Isolated 26-56 Vdc (optimized for 50 Hz rejection)
(9) ADD-ON OPTIONS
  Select
Nothing(leave field blank) for No Options
,XZ for Extra zero, fixed, at right of display
(10) ADD-ON OPTIONS
  Select
Nothing(leave field blank) for No Options
,D4 for Screw-terminal barrier strip for power and signal (removes these inputs from PCB edge connector)
(11) ADD-ON OPTIONS
  Select
Nothing(leave field blank) for No Options
,BL for Lens without Newport logo
 NOTE: All combinations may not be valid, check spec sheet for valid part numbers.


   

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