Omega Products DP3002 User Manual

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.

D-1

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