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620S

Product catalog summary

Overview: The Nokeval 620S is a 2-wire temperature transmitter designed for Pt100 sensors, offering a wide input range of -200 to +700°C with high accuracy and linearization capabilities. It is suitable for precise temperature measurements and can replace multiple narrower range transmitters without sacrificing accuracy.

Specifications:

Input: Pt100 according to DIN 43760
Accuracy: ±0.05% of span
Linearizing Accuracy: ±0.05% of span
Ambient Temperature Effect:
- Span <100°C: ±0.01%/°C
- Span >100°C: ±0.005%/°C
Supply Voltage Effect: ±0.005%/V
Repeatability: 0.05%
Response Time: 0.25 s
External Leadwire Resistance Effect: ±0.002%/ohm typical, max. 50 ohm/wire
Supply Voltage Range: 12-40 VDC, reverse polarity protected
Output: 4-20 mA
Min. Output: 3.8 mA
Current Limitation: 27 mA
Sensor Current: 0.7 mA
Operating Temperature: 0-55°C
Storage Temperature: -10 to +70°C
Mounting: Wall and DIN 46277 rail
Module Width: 22.5 mm
Housing: Polycarbonate, IP10
Weight: 200 g
Temperature Range: -200 to +800°C
Min. Span: 50°C
Max. Span: 800°C

Ordering Information: Specify model, sensor type, and output range. Example: 620S-Pt100-0/100 for a range of 0-100°C.

Connection Diagram: The document includes a connection diagram for 3-wire and 2-wire inputs, power supply requirements, and maximum loop resistance details.

Dimensions: The transmitter has a compact design with dimensions of 82 x 22.5 x 99 mm, suitable for DIN rail mounting.

Catalog excerpts

www.nokeval.com [email protected] 2-wire temperature transmitter 620S for Pt100 sensors • Input range -200...+700°C • High accuracy ±0.05 % of span • Leadwire compensation up to 100 ohms • Linearization • Small case 22.5 mm • Mounting on DIN-rail Our model 620S temperature transmitter is designed to meet the most exacting temperature measuring requirements. Extreme accuracy is obtained by linearizing the measurement signal with an accuracy of 0.05 % to the temperature. Thus one transmitter can now replace several of narrower range without reducing accuracy. Leadwire resistance automatic compensation up to 50 ohms makes possible long transfer distances with small-crossarea signel cables. Range can easily be varied by changing the range resistors located under the front plate. Normally transmitters are delivered calibrated according to customer range requirements. Input Accuracy Linearizing accuracy Ambient temperature effect - Span <100°C - Span >100°C Supply voltage effect Repeatability Response time External leadwire resistance effect Supply voltage range Output Min. output Current limitation Sensor current Operating temperature Storage temperature Module width 22.5 mm Housing polycarbonate, IP10 Weight 200 g Temperature range -200..+800°C Min. span 50°C Max. span 800°C Sensor Output 4 mA (°C) Output 20 mA (°C) For example, range 0-100°C, type 620S-Pt100-0/100 Wall and DIN 46277 rail mountings Terminal board for 2 x 1.5 mm2

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