Omega Products RD8253 User Manual

Paperless Recorder

RD8250 Series

U 2 Configurable Isolated

Inputs for DC Voltage
and Current,
Thermocouples, RTDs,
Frequency, and
rpm Pulse

U 4 Internal Alarm

Setpoints

U 2 Alarm Relay Outputs
U 1 Digital Control Input
U Maximum Storage Rate

of 100 Samples/s

U Compact Flash Cards

Can Store Up to
2 GB of Data in Memory

U Bright, Clear Display
U Optional Software for

Graphic Analysis,
Printing, Transfer,
and Exporting

1

U Standard

⁄4 DIN

Panel Mount

With its dual-function keys and
sharp display, OMEGA’s RD8250
is a sophisticated process recorder.
The graphic user interface makes
configuration easy.

This recorder can display real-time
data in digital or trend format.
Via the front-panel USB port (order
“-USB” option), the user can upload
data from a flash memory card
to a PC.

The RD8252 comes with an external
AC adaptor with universal plug set
for 120 to 240 Vac, 50/60 Hz.
Other power options include 12 to
24 Vdc isolated input (RD8253), and
rechargeable battery pack option
(RD8252-UPS). With the battery
pack installed, the RD8252-UPS can
function for up to 8 hours, preserving
data and settings in the event of a
power loss.

Specifications

Input Power:

RD8252: 9 ±0.5 Vdc @ 5 VA
(depends on external loads)
non-isolated; external AC wall
transformer (included), 100 to
240 Vac, 50/60 Hz
RD8253: Isolated 12 to 24 Vdc
(not compatible with internal
battery pack option below)
RD8252-UPS: With internal battery
pack option; provides uninterrupted
operation and controlled output

Output: 2 outputs, 5 Vdc @ 50 mA,
to power external sensors

Number of Channels:
2 universal, user selectable

Isolation: 300 Vac/Vdc channel input
to chassis ground

DC Input

Voltage:
Ranges: 0 to 250 mV,

0 to 1.25V, 0 to 2.5V, 0 to 5V,
0 to 12.5V, 0 to 25V
Accuracy: 0.1% of reading
Resolution: 0.025% FS

Current:
Ranges: 0 to 20 mA, 4 to 20 mA,

0 to 50 mA
Accuracy: 0.1% of reading,
excluding 250 Ω external
shunt (required)
Resolution: 0.025% FS

Thermocouple:
Accuracy: 0.3% FS (typical)

RD8252

Ambient Temperature Sensor
Accuracy: ±1.5°C (2.7°F)

Type Range:
J: -100 to 760°C ±2°C
(-148 to 1400°F ±3°F)
K: -100 to 1000°C ±2°C
(-148 to 1830°F ±3°F)
T: -100 to 400°C ±2°C
(-148 to 750°F ±3°F)
E: -80 to 400°C ±2°C
(-112 to 750°F ±3°F)

Shutdown During Blackout:
6 Vdc, 2400 mAh NiMH
Backup Time: 8 hours typical
(depends on external load)

RTD

Accuracy: 0.3% FS (typical)
Resolution: 0.1°C
Internal Current Source: 1 mA
Type Range (2- or 3-Wire):

100 Ω Pt 385: -100 to 750°C
(-148 to 1380°F)
100 Ω Pt 392: -100 to 750°C
(-148 to 1380°F)

Frequency Input (Hz)/Range:
0 to 10,000/0 to 600,000 rpm

Speed Input (rpm) Accuracy:
Frequency: ±1 Hz
rpm: ±1 rpm below 9999 rpm,
±10 rpm above 9999 rpm

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Input:

Low: <1 Vdc
High: >3 and <12 Vdc

Pulse Width: 10 ms minimum
Input Impedance: >100 kΩ
Measurement Rate:

Up to 100 samples/s per channel
Math Functions: y = mx + b; average,

high peak, low peak

Media: Compact flash to 2 GB
Display: LCD graphics,

160 x 80 pixels, black FSTN with
white LED backlight, user-controlled
backlight level and contrast adjustment
(electronic)

Display Modes: Trending (horizontal),
large dual digital readout, mixed mode

User Interface: 5-button keypad
(dual-function buttons)

Clock: Auto leap year and
daylight-saving adjustments,
internal battery backup

Relay Output: 2 alarm outputs,
30 V and 0.5 A form “A” relays

Opto-Isolated Input: 1 input,
5 to 12 Vdc activation @ 10 mA typical

Audible: Internal beeper
(multiple tones)

Dimensions (Front Panel):
96 H x 96 W x 152 D mm
(3.78 x 3.78 x 6”) (

Environmental: Indoor use only,
Installation Category II per IEC 664;
Pollution Degree Level II per
IEC61010-1

Operating Temperature:

-10 to 50°C (14 to 122°F)
Max Relative Humidity: 80% for

temperatures up to 31°C (88°F),
decreasing linearly to 50% @
40°C (104°F)

Optional USB: Front-panel USB 2.0
slave port for data and remote real-time
display when using Navigator software
(non-volatile)

Ethernet: Real time data display,
historic data transfer, remote control
and recorder configuration when using
navigator software; built-in web server
displays current measured values

1

⁄4 DIN)

RD8252 displaying alternate
reading mode, shown smaller
than actual size.

RD8250-SW, Windows software
for graphics analysis, printing and
exporting. See Accessories table
for ordering information.

Wireless

Conversion Receivers

Available. For Details

Visit omega.com/

mwtc-rec6

Extended Warranty

Program

SM

OMEGACARESM extended warranty program
is available for models shown on this page.
Ask your sales representative for full details
when placing an order. OMEGACARE
covers parts, labor and equivalent loaners.

SM

To Order Visit omega.com/rd8250 for Pricing and Details

Model No. Description
RD8252 Paperless recorder, 2 inputs, universal AC adaptor
RD8253 Paperless recorder, 2 inputs, DC power 12 to 24 Vdc

Options
Order Description

Suffix

-UPS Rechargeable battery for RD8252 unit

-USB USB communications with basic software

-EI Ethernet communications port

Accessories
Model No. Description

RD8250-SW Windows software for graphics analysis,

printing and exporting
RD8250-CFCR Compact flash card reader, USB 2.0 compatible
RD8250-NEMA4X-KIT NEMA 4X (IP66) enclosure kit
RD8250-MC512MBCF 512 MB memory card
RD8250-MC1024MBCF 1024 MB memory card
RD8250-MC2048MBCF 2048 MB memory card
RD8250-RESISTOR 250 Ω shunt resistor

Replacement Part (Field Installable)

Model No. Description

RD8250-PSC-2W Universal 100 to 240 Vac adaptor with universal plug set

Comes complete with Windows software CD with operator’s manual on CD and AC adaptor.
Ordering Example: RD8252, paperless recorder, 2 inputs. OCW-3, OMEGACARESM

extends standard 1-year warranty to a total of 4 years.

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