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4½ DIGIT OHMMETER, ¹⁄8 DIN
DP3002-O
U 19,999 Count Display Span
U 19.999 Ω to 19.999 kΩ Ranges
U 2-, 3- or 4-Wire Connection
U 120 dB CMR, 70 dB NMR
U 0.1 mV/ Count Linearized
Analog Output
U Bright, 14 mm (0.56") LED Display
U Display Hold and Test
U 115/230 Vac Power
U EMI/RFI Filter for AC Power
U Screw-Terminal Barrier Strip
U Short 104 mm (4.1") Deep ¹⁄₈ DIN Case
Options
U Serial BCD Output
U Isolated 9 to 32 Vdc or 26 to
56 Vdc Power
U NEMA 4 (IP65) Splash-Proof Lens Cover
INSTRUMENTATION
DP3002-OR1 shown
actual size.
D
The DP3002-O is a low-cost, high-resolution 4½ digit
(19,999-count) resistance meter with readout directly
in ohms. Four ranges are jumper-selectable: 19.999 Ω,
199.99 Ω, 1.9999 kΩ, 19.999 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
0.1 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
Power options include isolated 9 to 32 Vdc and 26 to
56 Vdc. Other options are 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.
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SPECIFICATIONS
Noise Rejection
NMR, SIG HI to SIG LOW: 70 dB,
50/60 Hz
CMR, ANA GND to PWR GND:
120 dB, DC to 60 Hz
CMV, ANA GND to PWR GND:
1500 Vp per HV test, 354 Vp per IEC
spacing
Environmental
Operating Temperature: 0 to 60°C
Storage Temperature: -40 to 85°C
Relative Humidity: 95% at 40°C
(non-condensing)
Display
Type: 7-segment, red LED
Height: 14 mm (0.56")
Symbols: 1.8.8.8.8
Decimal Points: Four positions
programmable by jumpers behind the
lens or connector
Overrange or Break Indication: Four
least-significant digits flash
RANGE RESOLUTION EXCITATION CURRENT ZERO ADJUST
19.999 Ω 1 MΩ 4 mA ±2.5 Ω
199.99 Ω 10 MΩ 4 mA ±2.5 Ω
1.9999 kΩ 0.1 Ω 40 µA ±250 Ω
19.999 kΩ 1 Ω 40 µA ±250 Ω
Input
Connection: 2-, 3- or 4-wire
Excitation Current: 4 mA or 40 µA
Resistance Break Indication: Meter
displays overrange
Overvoltage Protection: 25 Vp
Accuracy at 25°C
Zero Tempco: ±1 MΩ/°C (19.999 Ω &
199.99 Ω ranges),
±0.1 Ω/°C (1.9999 kΩ & 19.999 kΩ
ranges)
Span Tempco: ±0.005% of reading/°C
Full-Scale Step Response: 1 s
Warmup to Rated Accuracy: 20 min
Analog-to-Digital Conversion
Technique: Dual-slope, average value
Signal Integration Period: 100 ms
Read Rate: 2.5/s
Digital Inputs
Level: TTL or 5V CMOS compatible
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 nominal
Output Voltages: 4.7 Vdc
and -4.7 Vdc ±5%,10 mA max
Analog Output (Linearized)
Voltage: 0.1 mV/count
Calibration Error: Same as given
under accuracy
Current: 1 mA maximum
Source Resistance: 68 Ω
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
To Order Visit omega.com/dp3002-o for Pricing and Details
MODEL NO. DESCRIPTION
DP3002
-OR1
-OR2
-OR3
-OR4
*
-C1
-C3C
-C3E
NOTE: All combinations may not be valid, check online for valid part numbers.
Ordering Examples: DP3002-OR2, 4½ digit ohmmeter, 115 Vac power, resistance 0 to 199.99 Ω.
4½ digit ohmmeter
0 to 19.999 Ω
0 to 199.99 Ω
0 to 1.999 kΩ
0 to 19.999 kΩ
(Nothing, leave field blank) 115 Vac, 50/60 Hz
230 Vac, 50/60 Hz
Isolated 9 to 32 Vdc
Isolated 26 to 56 Vdc
*
(Nothing, leave field blank) red LED display
-G
Green LED display
(Nothing, leave field blank) no option
D-2
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