Omega Products DP25B-RTD User Manual

1

⁄8 DIN Strain, Process,

and Temperature Meters

With Optional Relays and Analog Output

DP25B Series

Inputs

U Thermocouple
U RTD
U Process (DC Voltage and Current)
U Strain Gage

Options

U Relay Output with Adjustable Deadband
U Isolated or Non-Isolated Analog Output
U Patented Programmable Color Display
U Low-Voltage Power Options
U NEMA 4 Front Bezel

Panel Meters

The OMEGA® DP25B Series features the biggest,
brightest display of any 1⁄8 DIN panel meter. The
user can select the display color: RED, AMBER,
or GREEN.

Unparalleled accuracy in signal conditioning is
available in this economical series of panel meters/
controllers. The series has a 4-digit,
9-segment display plus optional dual 5 A, SPDT
relays (Form “C”) and a choice of isolated or
non-isolated analog output. The scalable 0 to 10
Vdc, 0 to 20 mA, or 4 to 20 mA analog output can
be used for retransmission of the display value or
as a proportional control output, as required. The
microprocessor-based DP25B series includes
instruments for process (DC voltage and current)
strain gage, thermocouple, and RTD.

Specifications

Display: 4-digit, 9-segment, 21 mm (0.83") red, amber or

green LED (programmable)

Analog-to-Digital Technique: Dual slope
Internal Resolution: 15 bit
Polarity: Automatic
Read Rate: 3/second
Step Response: 2 seconds
Relay Outputs (Optional): 2 Form “C” (SPDT) relays rated

5 A 250 Vac, programmable for active high/low alarms with
latching/non-latching relays

Analog Output (Optional): 0 to 10V, 4 to 20 mA or
0 to 20 mA; can be assigned to a display range (scalable) or
proportional control output with setpoint #1 when used as a
control output

Power: 115 Vac or 230 Vac ±10%, 10 to 32 Vdc,
26 to 56 Vdc; 8 W max (DP25B-TC or -RTD), 11 W max
(DP25B-E or -S); 240 Vrms overvoltage protection

DP25B, shown actual size.

Thermocouple and RTD Models

The DP25B Series for thermocouple and RTD inputs
is a versatile panel meter and limit alarm-in-one that
is easily programmable. The DP25B-TC is selectable
for J, K, T, or J DIN thermocouples. The DP25B-RTD
accepts 100 Ω Pt (0.00385 curve) RTDs.

DP25B-TC (Thermocouple)

Input Type

-210 to 760°C (-346 to 1400°F)

-270 to 1372°C (-454 to 2500°F) 0.5°C

-210 to 400°C (-346 to 752°F) (0.9°F)

-200 to 900°C (-328 to 1652°F)

Isolation: Dielectric strength to 2500V transient per

3 mm spacing based on EN 61010 for 260 Vrms or Vdc

NMR: 60 dB
CMR: 120 dB
Operating Temperature: 0 to 50°C (32 to 122°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Relative Humidity: 90% @ 40°C (104°F) non-condensing
Dimensions: 48 H x 96 W x 152 mm D

(1.89 x 3.78 x 6.0")

Panel Cutout: 45 H x 92 mm W (1.772 x 3.622")
Weight: 36 g (1.27 lb)

Range Accuracy

Specifications (Thermocouple Meter)

Input: Thermocouple Types J, K, T and J DIN
Relay Hysteresis:

Programmable from 0 to 9999
Accuracy: ±0.50°C (0.9°F) after 30 min

warm-up

Temperature Coefficient: ±50 PPM/°C
Input Resistance: 100 MΩ

M-24

Panel Punches

Available, Visit

omega.com/

panelpunches

BEZEL DESIGN

IS A REGISTERED

TRADEMARK

M

Process and
Strain Models

The DP25B-E process
and strain meters accept
a wide range of DC voltage
and current inputs to cover
any typical process
application. They feature
easy, front-panel scaling
to virtually any engineering
units, selectable excitation of
4 voltages to work with most
transducers and transmitters,
front panel and remote
tare function for weighing
applications, and a hardware
lockout to prevent unauthorized
changes in set-up.

DP25B-TC-GN, programmed for optional green display (no
additional charge), shown actual size.

DP25B-RTD (RTD)

Input Type Range Accuracy

RTD, 100 Ω Pt, -200 to 850°C 0.5°C
2, 3, 4-wire (-328 to 1562°F) (0.9°F)

Specifications
(RTD Temperature Meter)

Input: RTD 100 Ω Pt (0.00385 curves)

2-, 3- and 4-wire selectable

Accuracy: ±0.50°C (0.9°F) after 30 min warm-up
Temperature Coefficient: ±50 PPM/°C
Input Resistance: 100 MΩ

DP25B-E (Process)/DP25B-S (Strain)
Input Type Range Accuracy

0 to 100 mV, ±50 mV,
mV, V, mA 0 to 10 V±5 V, 0 to 20 mA, 0.02% Rdg
4 to 20 mA

Specifications
(Process and Strain Meters)

Input Ranges: 0 to 100 mV, ±50 mV, 0 to 10V, ±5V,

0 to 20 mA, 4 to 20 mA
Protection: 240 Vrms max for voltage input ranges;

200 mA for current ranges
Input Impedance: 100 MΩ for 100 mV or

±50 mV range; 1 MΩ for 10V or ±5V range;
5 Ω for 20 mA current input

Analog-to-Digital Technique: Dual slope
Internal Resolution: 15 bit
Polarity: Automatic
Max Error Strain/Process: ±0.03% rdg
Span Temperature Coefficient: ±50 ppm/°C
Warm-Up to Rated Accuracy: 30 min
Excitation Voltage: 24V @ 25 mA or 12V @ 50 mA;

10V @ 120 mA or 5V @ 60 mA

Select Your

Color!

Program to display in

AMBER, or GREEN

RED

.

,

Totally Programmable
Color Displays

The OMEGA® DP25B
Series

controllers have totally

meters and

programmable color
displays—for RED

AMBER,

M-25

or

,

GREEN

.