RD8250-Series

Paperless Recorder With Configurable Universal Inputs

Models In Stock

2 Configurable Isolated Inputs for DC Voltage and Current, Thermocouples, RTDs, Frequency, and rpm Pulse
4 Internal Alarm Setpoints
2 Alarm Relay Outputs
1 Digital Control Input

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RD8250-Series

From ^$ 1,143.00

Models In Stock

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6 Variations available

See all series options below

Data Sheet

Product Overview

Accuracy ± 0.1 %
Accuracy Detail Voltage : 0.1%, Current : 0.1%, Thermocouple: 0.3%, RTD: 0.3%, Speed Input (rpm) , Frequency: ±1 Hz rpm: ±1 rpm below 9999 rpm, ±10 rpm above 9999 rpm
Approvals CE
Display Note LCD graphics, 160 x 80 pixels, black FSTN with white LED backlight, user-controlled backlight level and contrast adjustment (electronic) User Interface: 5-button keypad (dual-function buttons) Display Modes: Trending (horizontal), large dual digital readout, mixed mode.
Display Resolution 160 x 80 Pixels
Display Type LCD
Electrical Output 5 Vdc @ 50 mA
Enclosure Ratings Note Indoor use only, Installation Category II per IEC 664; Pollution Degree Level II per IEC61010-1
Frequency Measurement Range 0 to 600,000 rpm
Height 96 mm
Impedance Input >100 kΩ
Input Current 0 to 20 mA, 4 to 20 mA, 0 to 50 mA
Input Type Thermocouple, RTD, Voltage, Current, Frequency, RPM Pulse
Input Voltage 0 to 250 mVdc, 0 to 1.25 Vdc, 0 to 2.5 Vdc, 0 to 5 Vdc, 0 to 12.5 Vdc, 0 to 25 Vdc
Isolation 300 Vac/Vdc channel input to chassis ground
Length 152 mm
Measurement Type Universal
Memory 2 GB, Compact Flash
Mounting 1/4 DIN Panel Mount
Number of Inputs 2
Number of Relays 2
Operating Temperature, Max 50 °C
Operating Temperature, Min -10 °C
Opto-Isolated Input 5 to 12 Vdc Activation @ 10 mA
Output Detail 2 outputs, 5 Vdc @ 50 mA, to power external sensors
Programmable Functions Peak, Scale and Offset
Pulse Input Note 10 ms
Relative Humidity 80% RH
Relative Humidity Note 80% for temperatures up to 31°C (88°F), decreasing linearly to 50% @ 40°C
Resolution Voltage: 0.025%, Current: 0.025%, RTD: 0.1°C
RTD Type 100 Ω Pt sensor, α= 0.00385 or 0.00392
Sampling Rate 100 Hz (100 updates/second)
Series ID RD8250-Series
Sound Output Internal Beeper(Multiple Tones)
Switch Output 30 V @ 0.5 A
Switch Type Form A Relay
Temperature Measurement Range J: -100 to 760°C ,K: -100 to 1000°C,T: -100 to 400°C,E: -80 to 400°C,RTD:-100 to 750°C
Thermocouple Type J, K, T, E
Width 96 mm

Supported Applications

The Omega RD8250 Series is a paperless recorder designed for industrial process monitoring. It functions as a solid-state data recorder and panel indicator, replacing traditional paper recorders by storing historic data on CompactFlash™ memory cards to eliminate issues with jamming, ink smudging, or pen clogging. The instrument supports real-time trend viewing and digital readouts for applications requiring the measurement of voltage, current, thermocouples, RTDs, frequency, and speed inputs.

Operating Conditions & Performance

The RD8250 Series operates within an ambient temperature range of -10 to 50°C (14 to 122°F). Relative humidity is rated at 80% for temperatures up to 31°C (88°F), decreasing linearly to 50% @ 40°C (104°F). The device is specified for indoor use only, meeting Installation Category II per IEC 664 and Pollution Degree Level II per IEC61010-1.

Performance specifications vary by input type:

DC Voltage Accuracy: 0.1% of reading
DC Current Accuracy: 0.1% of reading (excluding 250 Ω external shunt)
Thermocouple Accuracy: 0.3% FS (typical) for types J, K, T, and E
RTD Accuracy: 0.3% FS (typical) for 100 Ω Pt 385 and 100 Ω Pt 392 sensors
Frequency Input Range: 0 to 10,000 Hz or 0 to 600,000 rpm with ±1 Hz accuracy for frequency and ±1 rpm below 9999 rpm (±10 rpm above) for speed
Ambient Temperature Sensor Accuracy: ±1.5°C (2.7°F)

Data storage capacity reaches up to 2 Gigabytes on CompactFlash™ cards, with a measurement rate of up to 100 samples/s per channel.

Configuration Options

The series offers configurable inputs and outputs tailored for specific process needs. Key capabilities include:

Inputs: Two universal, user-selectable isolated channels supporting DC Voltage (0 to 25V ranges), DC Current (0/4 to 20 mA or 0 to 50 mA), Thermocouples (J, K, T, E), RTDs (100 Ω Pt 385/Pt 392), Frequency, and Speed.
Outputs: Two alarm relay outputs rated at 30 V and 0.5 A form 'A' relays; one opto-isolated digital control input activated by 5 to 12 Vdc @ 10 mA typical.
Data Storage & Display: LCD graphics display (160 x 80 pixels) with user-controlled backlight and contrast. Data is stored on CompactFlash™ cards ranging from 512 MB to 2 GB.
Power Options: Models support external AC power via a universal adaptor or isolated DC input, with an optional internal battery pack for uninterrupted operation during blackouts.

Key Product Differences

The RD8250 Series is differentiated by model number and available options:

RD8252: Paperless recorder with 2 inputs, powered by an external AC wall transformer (100 to 240 Vac, 50/60 Hz) providing 9 ±0.5 Vdc @ 5 VA.
RD8253: Paperless recorder with 2 inputs, designed for isolated DC power supply of 12 to 24 Vdc (not compatible with the internal battery pack option).

Available order suffixes and accessories include:

-UPS: Rechargeable battery pack providing up to 8 hours typical operation during power loss for RD8252 units.
-USB: Front-panel USB 2.0 slave port for data transfer and remote real-time display using Navigator software.
-EI: Ethernet communications port supporting real-time data, historic transfer, remote control, configuration via web server, and built-in web interface.
NEMA 4X (IP66) Enclosure Kit: Optional enclosure for enhanced environmental protection.