Combustible Gas Sensor AirTest Model TR-5200

TR-5200 - 4-20 mA Sensor / Transmitter

Combustible,Gas,Sensor,AirTest,Model,TR-5200 Catalytic bead technology is used as the sensing element in the TR-5200 Combustible Gas (LEL) Sensor. The sensor produces a response linear to the gas concentration being detected. This sensor is used to monitor methane (CH4), natural gas, propane (C3H8), and other combustible gases at the lower explosive limit (LEL) level. This sensor is for use in non-classified areas.

Specifications | Installation | Calibration | Dimensions | Wire Diagrams

Specifications

Sensing Element	Catalytic Bead
Standard Range	0 to 100 % LEL Combustible gas
Gas Sampling Method	Diffusion
Linearity	Linear
Operating temperature	-20°C to +50°C -4°F to +122°F
Dimensions L x W x D (in)	6.2 x 4 x 2.4
Dimensions L x W x D (cm)	15.6 x 10 x 6
Humidity (non-cond.)	0 to 90%
Sensor Life Expected	3+ years
Calibration Interval	12 months
Warm-up Time	<3 minutes
Response Time	<1 minute
Power requirement	12 to 30 VDC
Power consumption	<2 watts
Output	4-20 mA
Enclosure Material	PVC
Weight	16 ounces
Approvals	CSA/NRTL

AirTest continues to work on product improvement, specifications are subject to change without notice.

Installation

Locate a flat surface to mount the enclosure so that the sensor can face downward. There is a power entry at the top.
Remove the cover of the enclosure by removing the 4 screws in the corners.
Connect the electrical fittings to the enclosure and bring in the electrical wires. NOTE: BE SURE WIRING IS DONE ACCORDING TO THE LOCAL ELECTRICAL CODE REQUIREMENTS.
Connect the wires to the terminal block as shown on the wiring drawing. (See Fig.1)

Calibration

The sensor/transmitter must be connected to the controller. Allow the sensor three to five minutes to warm-up before calibrating.

Connect negative lead of voltmeter to test point C. Connect positive lead of voltmeter to test point D. Apply "zero" gas to the sensor. (ambient air may be used if it is certain there are no contaminants in the area). Adjust VR2 (ZERO) to 0.0Volts ± 0.020V.
Connect negative lead of voltmeter to test point A. Connect positive lead of voltmeter to test point E. Adjust VR4 (CURRENT) to 0.400 Volts. If an ammeter is available it is preferable to connect it in line A1 and adjust VR4 to read 4.00 mA.
Refer to graph below, apply calibration gas to the sensor at a rate of .5 LPM. Adjust VR3 (SPAN) to a voltage corresponding to the % LEL calibration gas used. The formula below can also be used to determine the voltage value.

In the example below, if 50 % LEL calibration gas is used, the span voltage is 1.2 volts.

NOTE: The system voltage, measured between point A (negative) & point F (positive), is factory set. Do not change this voltage value. The sensor voltage, measured between point A (negative) & point B (positive), is factory set and the value is sensor type dependent. Do not change this voltage value. Damage to the sensor will result if the voltage is set too high. For the TR-5200 this is 4.25 volts.

Figure 1

Figure 2

Dimensions

TR-5200 Layouts

Wire Diagrams

TR-5200 Wiring