RDA-Series

Supported Applications

The Omega RDA Series is a value-priced paperless recorder that integrates measurement, display, alarm generation, and data logging into a single slim instrument. Designed for industrial environments requiring multi-channel recording with touch screen control, the series supports applications involving thermocouple or RTD inputs without an external HMI.

Key functional capabilities include:

• Real-time trend records displayed via trend graph or bar graph
• History and alarm record review within the logger using 150MB of internal storage
• Data export to an external USB drive

Operating Conditions & Performance

The RDA Series operates in ambient temperatures from -10~+60°C (+14 ~ +140°F) with a humidity rating of 90%RH. Storage temperature ranges are specified as -20 ~ +80°C (-4 ~ +176°F). The instrument utilizes natural air cooling and consumes ≤5W power.

Performance specifications vary by input type:

• Accuracy (RTD): 0.2%FS ±1 digit for Pt100; 0.3%FS ±1 digit only for Cu50.
• Accuracy (Thermocouple): 0.2% FS ±1 digit with internal cold junction compensation (CJC). An additional 1°C CJC error must be considered. For Type B thermocouples, the stated accuracy is guaranteed only between 600~1800°C (+1112 ~ +3272°F).
• Response Time: ≤1.5 seconds (digital filter parameter dL set as 0 or 1).

The series meets Electromagnetic Compatibility standards including IEC61000-4-4 (Electrical Fast Transient) and IEC61000-4-5 (Electrical Surge). Isolation withstanding voltage is rated at 2300VDC among power, relay contact or signal terminals, and 600V among isolated electroweak terminals.

Configuration Options

The RDA Series offers configurable input channel counts ranging from 2 to 6 channels depending on the model. All models feature a TFT True Color display with an 800*480 resolution, long-life LED backlighting, and a four-wire resistive touch screen interface.

Input Configurations

• RDA-520 Models: Support two inputs. RTD versions accept 2-wire Pt100 or Cu50 (including 0-80ohm, 0-400ohm); TC versions support K, S, R, E, J, T, B, N, WRe5-WRe26 thermocouples.
• RDA-740 Models: Support four inputs with the same RTD and Thermocouple types as above. Every two inputs share one common port on RTD models.
• RDA-760 Models: Support six inputs with the same RTD and Thermocouple types as above. Every two inputs share one common port on RTD models.

Measuring Ranges

The series supports specific ranges per sensor type, including Pt100 (-200 ~ +800°C), Cu50 (-50 ~ +150°C), and various thermocouple types such as K (-50 ~ +1300°C) and WRe5~WRe26 (0 ~ +2300°C). Each channel supports independent input specifications with square-root, multiplication, addition, and subtraction functions.

Key Product Differences

The series is divided into two physical form factors based on display size and installation depth:

• RDA-520 (5-inch models): External dimensions are 145 x 105 x 100mm (Width*Height*Depth) with an installation opening of 135 x 96 x 96mm. Unit weight is 1.21 lbs (0.55kg).
• RDA-740 and RDA-760 (7-inch models): External dimensions are 203 x 155 x 40mm (Width*Height*Depth) with an installation opening of 192 x 139 x 34mm. The slim 40mm depth allows installation in machinery or equipment with limited space. Unit weight is 1.54 lbs (0.7kg).

Power supply requirements are consistent across the series at 100~240VAC, -15%, +10% / 50~60Hz.