BAPI Temperature Transmitter Overview

Temp Transmitter Specifications
Output: 4 to 20mA
Accuracy: 0.1% of Span

T10K Transmitter
Sensor: 10K Ohm thermistor
Supply Voltage: 8 to 35 VDC
Maximum Loop Resistance: 800 Ohm at 24VDC
Sensed Temperature Limits:
-45 to 65°C (-49 to 149°F)
Accuracy: ±1.015°C (0 to 65°C)
Linearity: ±0.065°C (0 to 65°C)
Temperature Resolution: Span/1024
Operating Temperature:
Transmitter: 0 to 70°C
Sensor:
-65 to 105°C (standard)
-40 to 155°C (available)

T100 and T1K Transmitters
Sensor: 100 Ohm or 1000 Ohm Platinum RTD
Supply Voltage: 7 to 40 VDC
Maximum Loop Resistance: 850 Ohm at 24VDC
Span: Min 16.6°C (30°F), Max 555°C (1000°F)
Low Temperature:
Min -90°C (-130°F), Max 482°C (900°F)
Accuracy: ±0.065% of Span (8 & 16mA outputs)
Linearity: ±0.125% of Span
Operational Humidity:
0 to 95%, non-condensing
0 to 100%, condensing for short intervals
Output Current limits:
Less than 1mA and 22.35 ± 0.15 mA
Power Output Shift: ±0.009% of Span 7 to 40VDC
Connections:
Four 22-gauge etched Teflon leads or terminal blocks
Operating Temperature:
Transmitter: -20 to 70°C
Sensor:
-65 to 105°C (standard), -200 to 600°C (available)

Temperature Transmitter Description
BAPI temperature transmitters incorporate a sensor - either a 10KW thermistor or a platinum 100 Ohm or 1k Ohm RTD - and a transducer. These devices provide an accurate two-wire, 4 to 20mA output over a specified range. They are specifically designed for temperature sensing and transmission over long distances without degradation of the 4 to 20mA signal.
The thermistor transmitter (BA/T10K) is microprocessor based and does not allow or require field calibration. The thermistor transmitter is first programmed for the specified range and tested using an electronic interface. After connecting a thermistor to the transducer, the output is verified at one temperature.
The RTD transmitters (BA/T100 & BA/T1K) are first calibrated with simulated RTD resistances for the specified range. Then an RTD is connected to the transmitter and the output is verified at one temperature. RTD transmitters have non-interacting zero and span potentiometers that are field adjustable.
BAPI has verified over 200 temperature ranges for the BA/T100 and BA/T1K transmitters. If we don’t currently offer the exact range you’re looking for, call your BAPI representative to see if we can create a special range.
Additionally, BAPI can provide matched RTD-based units, BA/T100M and BA/T1KM. Matched (sensor-transmitter pair) units utilize the tight tolerance of Class A RTDs to improve overall accuracy. The matched unit is tested in an environmental chamber against an NIST traceable reference thermometer. Each matched pair is provided with a “Certificate of Calibration” which lists the tested and calculated offset values, and identifies the equipment, products and people involved in the calibration process. The overall accuracy of the matched pair now becomes a function of the transmitter linearity, RTD linearity and reference thermometer uncertainty.

Matched errors are ±((Span * Linearity Error) + (Reference Thermometer uncertainty)
Where linearity error =
Square Root((Transmitter Linearity)2 + (RTD Linearity)2) = Square Root((0.125%)2 + (0.2%)2) = 0.234%

BA/T1K(-30 to 130F)
Span = 130 - (-30) = 160
Matched error = ±((160*0.234%) + (0.05°F)= ±0.42°F

BA/T1K(45 to 95F)
Span = 95 - 45 = 50
Matched error = ±((50*0.234%) + (0.05°F)= ±0.17°F

These accuracies are for the entire range of the sensor, although the accuracies in the midband of the sensor will be tighter than those near the endpoints of the specified range. Other matching and/or certification options may be available, please contact your BAPI representative for details.
BAPI temperature transmitters come in a ruggedized package for all non-room configurations where moisture or condensation may be a problem. The potting material used to ruggedize the transmitters has high thermal conductivity to eliminate circuit overheating and low thermal expansion to minimize the stress on the circuit components. Due to the extremely low moisture absorption properties of the potting material, a ruggedized transmitter will remain operational even if temporarily immersed in water.