The DP302-O is a low-cost 3-1/2 digit (1999-count)
resistance meter with readout directly in ohms. Four
ranges are jumper-selectable: 19.99 Ω, 199.9 Ω,
1.999 kΩ, 19.99 kΩ. It is complete with low-level
current excitation and open-resistance indication.
The current source is tied to the reference of the A/D
converter for true ratiometric operation and immunity
to changes in line voltage.
STANDARD FEATURES
Electrical features include linearized analog output of
1 mV per count, which is ideal for driving a strip-chart
recorder. Mechanical features include a bright
14 mm (0.56") LED display, a screw-terminal barrier
strip for signal and power, and a compact 1/8 DIN
case that requires a depth of less than 104 mm (4.1")
behind the bezel.
OPTIONS
Options are isolated 9 to 32 Vdc or 26 to 56 Vdc
power, a PCB edge connector for display control and
output of +4.7 Vdc and -4.7
Vdc, and a splash-proof
lens cover which meets NEMA 4 (IP65) requirements.
SPECIFICATIONS Noise Rejection NMR: 70 dB, 50/60 Hz CMR, ANA GND to PWR GND: 120 dB to 60 Hz CMV, ANA GND to PWR GND: 1500 Vp per HV test, 354 Vp per IEC spacing
Power AC Voltages: 115 or 230 Vac, ±15% AC Frequency: 49 to 440 Hz DC Voltages: 9 to 32 Vdc, isolated to 300 Vp; 26 to 56 Vdc, isolated to 300 Vp Power Consumption: 3.7 W Output Voltages: 4.7 Vdc and -4.7 Vdc ±5%,10 mA max
Input Connection: 2-, 3- or 4-wire Excitation Current: 4 mA or 40 µA Resistance Break Indication: Meter displays overrange Overvoltage Protection: 25 Vp
Display Type: 7-segment, red LED Height: 14 mm (0.56") Symbols: 1.8.8.8 Decimal Points: Three positions programmable by jumpers or at connector
Overrange or Break Indication: Three least-significant digits blank
Accuracy At 25°C Span Tempco: ±0.01% of reading/°C Zero Tempco: ±1 m/°C (19.99 Ω and 199.9 Ω ranges), ±0.1 Ω/°C (1.999 kΩ and 19.99 kΩ ranges) Full-Scale Step Response: 1 s Warmup to Rated Accuracy: 10 min
Environmental Operating Temperature: 0 to 60°C Storage Temperature: -40 to 85°C Relative Humidity: 95% at 40°C (non-condensing)
Analog-to-Digital Conversion Technique: Dual-slope, average value Signal Integration Period: 100 ms Read Rate: 2.5/s
Analog Output (Linearized) Voltage: 1 mV/count Calibration Error: Same as given under accuracy Current: 1 mA maximum Source Resistance: 68 Ω
Digital Inputs Level:TTL or 5V CMOS compatible
Mechanical Bezel: 96 W x 48 H x 5.1 mm D (3.78 x 1.89 x 0.20") Depth Behind Bezel: 104 mm (4.09") Panel Cutout: 92 W x 45 mm H (3.62 x 1.77") Weight: 15 oz (425 g) Case Material: 94 V-0 UL-rated polycarbonate
† All dollar amounts on this site are shown in US currency.
