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DRU Cryogenic Temperature Converter
Brand: Yokogawa Electric Corporation
The DRU is a nest-mounting type DCS-supported cryogenic temperature converter that is used in combination with a four-wire cryogenic RTD (Yokogawa J263*B) and converts high-precision measured values of wide temperature ranges into isolated DC current or DC voltage signals.
Specifications
Accuracy
- Output 1: ± 0.1 % of Span or ± 0.3° C (± 0.54° F), whichever is greater (Includes Linearization Error)
- Output 2: within ± 0.2 % Relative Error between Output-1 & 2
Burn-Out
- Down
- Off
- Up
Consumption
- 70 mA at 24 Vdc - Current Consumption
Electrical Connectors
- M4 Screw Terminal of the Dedicated Nest - External Wiring
Enclosure, Body Material
- ABS Resin
Humidity
- 5 to 90 % Relative Humidity, Non-Condensing
Insulation Resistance
- 100 megaohms or more at 500 Vdc between Input & Output, Output & Power Supply
Mounting
- Nest-Mounting
Operating Temperature
- 0° to 50° C (32° to 122° F)
Output
- 1-5 Vdc
Power Supply Effect
- ± 0.1 % of Span or Less for the Fluctuation within the Operating Range of Power Supply Voltage Specification
Resistance
- 1 Megaohm During Power On - Input Resistance
- 2 kiloohms or more for Both Output 1 & Output 2 - Load Resistance
- 3 kiloohms During Power Off - Input Resistance
- 50 ohms or Less Per Wire - Allowable Leadwire Resistance
Response Time
- 200 milliseconds, 63 % Response (10 to 90 %)
Sensor, Probe Type
- 4-Wire RTD
Span & Zero Adjustments
- ± 1 % - Input Adjustment
- ± 10 % - Output Adjustment
Supply Voltage
- 1,500 Vac/minute between Input & Input, (Output & Power Supply) - Withstand Voltage
- 24 Vdc ± 10 % (Ripple Content 5 % Peak-to-Peak or Less)
- 500 Vac/minute between Output & Power Supply - Withstand Voltage
Temperature Effect
- ± 0.2 % of Span or Less or for a Temperature Change of 10° C (18° F) - Effect of Ambient Temperature
