Accessories / Temperature Transmitter

In-Head Temperature Transmitter

PN 29210

  • Push Button Calibration

  • RTD Sensor Input

  • Drift Free Digital Linearization

  • Re-Rangeable Without Computer Interface

  • LED Over-Range Indication

  • One Spare Transmitter Can Cover Entire Range

  • Reverse Polarity Protection

The RdF 2910 in-head RTD temperature transmitter incorporates the latest in digital technology accuracy ensuring drift free operation.

The transmitter connects to any standard RTD and draws 4 to 20 mA linear with temperature.

Since the zero and span are set to conform to a particular sensor type, the sensor temperature coefficient of resistance (“a = 0.00385, 0.003916, 0.003923, etc...”) has negligible effect on accuracy.

Performance Specifications

   
 

Sensor Temperature Range
-200°C to 850°C
-328°F to 1562°F

RTD Sensing Element
3 Wire 100Ω Platinum RTD DIN 43760;
IEC 751 (α = 0.00385 Ω/Ω/°C)
JIS1604 (α = 0.003916 Ω/Ω/°C)

Calibrated Accuracy and Linearity
±0.1°C ±0.1% from –100°C to 510°C
±0.2°C ±0.1% from –150°F to 950°F
±0.2°C ±0.2% from –200°C to 840°C
±0.4°C ±0.2% from –320°F to 1550°F

Minimum Span
20°C(40°F)

Excitation Current
1 mA maximum

Sample Rate
500 mS per sample

     

Burnout
Red LED indicates open RTD
or over-range
Maximum current: 22mA

Thermal Drift
Zero = ±0.12µA /°F Span = ±0.28µA /°F

Warm Up Time
2 minutes for full accuracy

Programming Switch
Momentary push button

Lead Resistance
Maximum 10Ω/leg
Effect 0.02% full range output
(plus lead resistance mismatch)
   

Teflon® is a registered trademark of the DuPont Corporation.

Output

   
 

Output Range
4-20 mA 2 wire loop powered
(can be ranged 20-4 mA)
Maximum 3.8 to 22mA

Supply Voltage
8 to 30 VDC

Voltage Effect
0.4mA/Volt

Accuracy
±5mA

Burnout
Up-Scale 22 mA
(Downscale to order)

     

Thermal Drift
Zero: ±0.12mA/°F
Spam: ±0.28mA/°F

Response Time
500 mS to reach 70% of Value

Warm Up Time
2 minutes for full accuracy

Loop Noise
±0.1 mAp-p

Ripple Rejection
±0.002mA/Volt
(measured @ 50Hz 1 volt p-p)
   

Mechanical Details

Ordering Specifications

    2910     Model Number, 2 Wire 4-20 mA RTD Transmitter
 
 Minimum Temperature, 4 mA Zero Temperature
 
 Maximum Temperature, 20 mA Span Temperature
 
 Temperature (°C or °F)
 
 CONNECTION HEAD
D
K 		Without Connection Head
Head DIN B Cast Aluminum
 
2910
 
–20
400
C
D
Typical write-up for 2910

Calibrate with a small (3 mm) diameter screwdriver and an RTD simulator (or decade resistor).

  1. simulate the RTD resistance at the 4 mA temperature.

  2. Press the programming switch (using the small screwdriver)

    until the RED programming LED flashes.

  3. Simulate the RTD resistance at the 20mA temperature.

  4. Press the programming switch (using the small screwdriver)

    momentarily and the RED programming LED flashes quickly