Temperature Transmitter Overview

TEMPERATURE TRANSMITTER DESCRIPTION

BAPI temperature transmitters incorporate a sensor – either a 10KΩ thermistor or a platinum 100Ω or 1kΩ 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 also comes in a 0 to 5 VDC or 0 to 10 VDC output.

The thermistor transmitter (BA/T10K) is microprocessor based and does not allow or require field calibration. The thermistor transmitter is fi rst 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%

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

BA/T1K(45 to 95°F)
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.

SPECIFICATIONS

T10K Transmitter

Sensor:
10KΩ Thermistor

Output:
4 to 20 mA, 0 to 5 V, or 0 to 10 V

Supply Voltage:
10 to 35 VDC (0-5 VDC or 4-20 mA Outputs)
15 to 35 VDC (0-10 VDC Output)
12 to 24 VAC (0-5 VDC Outputs)
15 to 24 VAC (0-10 VDC Output)

Maximum Loop Resistance:
700Ω at 24 VDC (4 to 20 mA Output)

Impedance:
>10K ohms (Voltage Output)

Calibration Range:
-40 to 85°C (-40 to 185°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:
100Ω or 1000Ω Platinum RTD

Supply Voltage:
7 to 40 VDC

Output:
4 to 20 mA

Max. Loop Resistance:
850Ω at 24VDC

Span:
Min 16.6°C (30°F), Max 555°C (1000°F)

Zero:
Min -100°C (-148°F), Max 482°C (900°F)

Field Adjustments:
(Unit is factory calibrated, field adjustment will void calibration warranty)

Zero:
+/- 10% • Span: +/- 10%

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)

0-100 °F TEMPERATURE TRANSMITTER OUTPUT TABLE

°F °C mA 5V 10V
0 -17.78 4.000 1.00 2.00
1 -17.22 4.160 1.04 2.08
2 -16.67 4.320 1.08 2.16
3 -16.11 4.480 1.12 2.24
4 -15.56 4.640 1.16 2.32
5 -15.00 4.800 1.20 2.40
6 -14.44 4.960 1.24 2.48
7 -13.89 5.120 1.28 2.56
8 -13.33 5.280 1.32 2.64
9 -12.78 5.440 1.36 2.72
10 -12.22 5.600 1.40 2.80
11 -11.67 5.760 1.44 2.88
12 -11.11 5.920 1.48 2.96
13 -10.56 6.080 1.52 3.04
14 -10.00 6.240 1.56 3.12
15 -9.44 6.400 1.60 3.20
16 -8.89 6.560 1.64 3.28
17 -8.33 6.720 1.68 3.36
18 -7.78 6.880 1.72 3.44
19 -7.22 7.040 1.76 3.52
20 -6.67 7.200 1.80 3.60
21 -6.11 7.360 1.84 3.68
22 -5.56 7.520 1.88 3.76
23 -5.00 7.680 1.92 3.84
24 -4.44 7.840 1.96 3.92
25 -3.89 8.000 2.00 4.00
26 -3.33 8.160 2.04 4.08
27 -2.78 8.320 2.08 4.16
28 -2.22 8.480 2.12 4.24
29 -1.67 8.640 2.16 4.32
30 -1.11 8.800 2.20 4.40
31 -0.56 8.960 2.24 4.48
32 0.00 9.120 2.28 4.56
33 0.56 9.280 2.32 4.64
34 1.11 9.440 2.36 4.72
35 1.67 9.600 2.40 4.80
36 2.22 9.760 2.44 4.88
37 2.78 9.920 2.48 4.96
38 3.33 10.080 2.52 5.04
39 3.89 10.240 2.56 5.12
40 4.44 10.400 2.60 5.20
41 5.00 10.560 2.64 5.28
42 5.56 10.720 2.68 5.36
43 6.11 10.880 2.72 5.44
44 6.67 11.040 2.76 5.52
45 7.22 11.200 2.80 5.60
46 7.78 11.360 2.84 5.68
47 8.33 11.520 2.88 5.76
48 8.89 11.680 2.92 5.84
49 9.44 11.840 2.96 5.92
°F °C mA 5V 10V
50 10.00 12.000 3.00 6.00
51 10.56 12.160 3.04 6.08
52 11.11 12.320 3.08 6.16
53 11.67 12.480 3.12 6.24
54 12.22 12.640 3.16 6.32
55 12.78 12.800 3.20 6.40
56 13.33 12.960 3.24 6.48
57 13.89 13.120 3.28 6.56
58 14.44 13.280 3.32 6.64
59 15.00 13.440 3.36 6.72
60 15.56 13.600 3.40 6.80
61 16.11 13.760 3.44 6.88
62 16.67 13.920 3.48 6.96
63 17.22 14.080 3.52 7.04
64 17.78 14.240 3.56 7.12
65 18.33 14.400 3.60 7.20
66 18.89 14.560 3.64 7.28
67 19.44 14.720 3.68 7.36
68 20.00 14.880 3.72 7.44
69 20.56 15.040 3.76 7.52
70 21.11 15.200 3.80 7.60
71 21.67 15.360 3.84 7.68
72 22.22 15.520 3.88 7.76
73 22.78 15.680 3.92 7.84
74 23.33 15.840 3.96 7.92
75 23.89 16.000 4.00 8.00
76 24.44 16.160 4.04 8.08
77 25.00 16.320 4.08 8.16
78 25.56 16.480 4.12 8.24
79 26.11 16.640 4.16 8.32
80 26.67 16.800 4.20 8.40
81 27.22 16.960 4.24 8.48
82 27.78 17.120 4.28 8.56
83 28.33 17.280 4.32 8.64
84 28.89 17.440 4.36 8.72
85 29.44 17.600 4.40 8.80
86 30.00 17.760 4.44 8.88
87 30.56 17.920 4.48 8.96
88 31.11 18.080 4.52 9.04
89 31.67 18.240 4.56 9.12
90 32.22 18.400 4.60 9.20
91 32.78 18.560 4.64 9.28
92 33.33 18.720 4.68 9.36
93 33.89 18.880 4.72 9.44
94 34.44 19.040 4.76 9.52
95 35.00 19.200 4.80 9.60
96 35.56 19.360 4.84 9.68
97 36.11 19.520 4.88 9.76
98 36.67 19.680 4.92 9.84
99 37.22 19.840 4.96 9.92
100 37.78 20.000 5.00 10.00