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3 3/4 Digit DC Voltmeter with BCD Output MODEL 204B - OPTION AVG/RMS
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
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
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
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 |
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