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Model
2520
is an economical 5-volt powered, high-resolution, high-accuracy 4 1/2
digit DC voltmeter in a compact 1/16 DIN case. The height of the panel
cutout is only 0.88 in (22.2 mm). The depth behind the panel is only
2.83 in (72 mm). Power consumption is 1 watt at 5 V dc.
SPECIFICATIONSLow cost, small size, low power consumption and excep-tional power-supply noise rejection make the 2520 ideal for demanding OEM and portable-instrument applications. Non-isolated character-serial BCD output is standard to allow the 2520 to be interfaced to other instrumentation. PARALLEL BCD OPTION F2M The F2M option is an upper board which converts the meter's serial BCD output to non-isolated, three-state parallel BCD. An address decoder on the board permits the meter's parallel BCD outputs to be enabled by a 4-bit binary address signal for three-state data-busing applications. SIGNAL INPUT
Configuration: Bipolar, true-differential Zero: Automatic NOISE REJECTION NMR: 60 dB at 50/60 Hz CMR: 86dB, DC to 60 Hz CMV: SIG LO to DIG GND ±1 Vp ACCURACY AT 25°C Maximum error: ±0.01% of reading ±2 counts Span tempco, standard: (2 V) ±0.005% of reading/°C, (20/200 V) ±0.0025 of reading/°C Span tempco, optional: (2 V) ±0.001% of reading/°C, (20/200 V) ±0.002% of reading/°C Step response: 2 s Warmup to rated accuracy: 0.5 hr ANALOG-TO-DIGITAL CONVERSION Technique: Dual-slope, average-value Polarity: Automatic Signal integration period: 100 ms Read rate: 2.5/s 3-WIRE RATIO REFERENCE Reference voltage: 0.5-3.0 V Load on reference, std: 40 kohm Load on reference, opt: 2.5/s DISPLAY Type: 7-segment, red LED Height: 0.56 in (14.2 mm) Symbols: 1.8.8.8.8 Decimal points: Four positions programmable internally or at connector Overrange indication: Display flash DIGITAL SIGNALS Output signals: TTL-compatible Hold Input: TTL or 5 V CMOS compatible Blanking Input: Open-collector compatible POWER Voltage: 5 V dc ±5% Current: 170 to 230 mA Power consumption: 1 W (nominal) ENVIRONMENTAL Operating temperature: 0 to 55°C Storage temperature: 40 to +85°C Relative humidity: 95% at 40°C (non-condensing) MECHANICAL Dimensions: Newport DIN3 (1/8 DIN) case (see Mechanical section for drawings) Weight: 5 oz (145 g) Case material: 94V-0 UL-rated polycarbonate |