|
|
|
STRAIN / MICROVOLT METER
Model 2520-PA is an economical 5-volt powered, high-resolution, high-accuracy 4 1/2 digit dc microvoltmeter in a compact 1/16 DIN case. The height of the panel cutout is 0.88" (22.2 mm), and the depth required behind the panel is only 2.83" (72 mm). Power consumption is 1 watt. Low cost, small size, low power consumption at 5 Vdc and exceptional power-supply noise rejection make the 2520-PA ideal for demanding OEM and portable-instrument applications. MICROVOLT PREAMPLIFIER The 2520-PA incorporates a preamplifier, which can be programmed for resolution from 1 to 25 ╡V/count and for zero offset up to ▒0.6 mV (RTI) ▒21% of full-scale readout (RTO). The 2520-PA can be configured for use with load cells and pressure gauges, which require zero and span adjustment for readout in engineering units. Bridge excitation may be provided by the same 5 Vdc supply that powers the meter, or by an external, isolated 10 or 15 Vdc power supply. The 2520-PA can also be configured as a microvoltmeter using an internal reference, or in a ratiometric mode using an external reference. SERIAL BCD Non-isolated, character-serial BCD output is standard to allow the 2520-PA to be interfaced to other instrumentation.
SPECIFICATIONS ANALOG INPUT Signal range: ▒20 mV (Most Sens. Scaling) / ▒500 mV (Least Sens. Scaling) Display range: ▒19,999 (Most Sens. Scaling) / ▒19,999 (Least Sens. Scaling) Resolution (╡V/count): 1 (Most Sens. Scaling) / 25 (Least Sens. Scaling) Preamplifier gain: 100 (Most Sens. Scaling) / 4 (Least Sens. Scaling) Input Configuration: Differential, ratiometric Coarse-Span Adjustment: Jumper-selectable gain ranges Fine-Span Adjustment: Front-panel accessible precision potentiometer Zero Adjustment (RTI or Deadload): ▒0.6 mV Zero Adjustment (RTO or Tare): ▒20.9% of full-scale display Bias Current: 10 nA typ, 20 nA max NOISE REJECTION NMR, SIG HI to SIG LO: 60 dB, 50/60 Hz CMR, SIG GND to SIG LO: 86 dB, dc to 60 Hz CMV, SIG GND to SIG LO: û1 to +2.5 Vdc Power Supply Rejection: 86 dB at 50/60 Hz ACCURACY AT 25░C Error Max: ▒0.01% of reading ▒2 counts Span Tempco, Typ: ▒0.003% of reading/░C Zero Tempco, Typ: ▒0.3 ╡V/░C Step Response: 2 sec to 99.9% of span Warmup to Rated Accuracy: 30 min CONVERSION Technique: Dual-slope, average-value Signal Integration Period: 100 msec Read Rate: 2.5/sec DIGITAL SIGNALS Output Signals: TTL-compatible HOLD Input: TTL or 5 V CMOS compatible BLANKING Input: Open-collector compatible POWER Voltage: +5 to +5.25 Vdc Current: 170 to 230 mA Power Consumption: 1 W (nominal) ENVIRONMENTAL Operating Temperature: 0 to 55░C (32 to 122░F) Storage Temperature: û40 to +85░C (-40 to 184░F) Relative Humidity: 95% at 40░C (104░F) (non-condensing) MECHANICAL Dimensions: 24 H x 96 W x 72 mm D (0.94" x 3.77" x 2.82") Panel Cutout: 22.2 x 92 mm Weight: 145 g (5 oz) Case Material: 94 V-0 UL-rated polycarbonate To Order (Specify Model No.) Prices Shown in U.S. Dollars
Ordering Example: 2520-PA dc powered strain/microvolt indicator, $360. |
▒19,999-Count Display Span
