4-20mA Transmitter Boards - Alphasense - (Version JPG) - Page n° 2 - PDF Catalogue | Technical Documentation

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Gas sensor, Carbon dioxide sensor, Nitrogen monoxide sensor, Oxygen sensor, Sensor

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Transmitter Boards

Figure 2 Transmitter Board Dimension Details Oxygen Transmitter

M3-

Span — adjust

Pill_ars v_Optional chassis mounting pillars

Toxic Gas Transmitter

r-16,5-

Span — adjust

—Pill_ars \—Optional chassis

mounting pillars

Washers MUST be fitted

All dimensions in mm ±0.15

Transmitter Specifications


	Input voltage required	+7.5 to +35.0 Volts DC
	Output at zero gas concentration (or 15% Oxygen)	4 mA (user adjustable)
	Output at full-scale (or 25% Oxygen)	20 mA (user adjustable)
	Setability/stability	<0.05mA (<0.25% Full Scale)
	Maximum load @ 20 mA, 24 VDC	825 ohms
	Supply voltage dependence	< ±0.2% output from +7.5 to +35 Volts DC
	Connector	2 pin Molex plug (ref. 22-27-2021) supplied with leads
	Transmitter current requirement	<100 mA
	Operating conditions	See sensor data sheet specifications
	Calibration	Multiturn zero and span potentiometers
	Power supply protection	Diode protection to voltage regulator
	No-power equivalent circuit (for Toxic gas versions)	Sensor short-circuited during power-down
	Full-scale gas concentration	Precalibrated (See Table 1)

Conformal Coating

The circuit board is conformally coated with an acrylic sealent to ensure reliable operation in extreme conditions.

NOTE: as applications of use are beyond our control, the information provided is given without legal responsibility. Customers should test under their own conditions, to ensure that the sensors and transmitters are suitable for their own requirements.

For further information on the performance of sensors in the Alphasense range or any other subject, please contact Alphasense Ltd. For Application Notes visit "www.alphasense.com"

In the interest of continued product improvement, we reserve the right to change design features and specifications without prior notification. The data contained in this document is for guidance only. Alphasense Ltd accepts no liability for any consequential losses, injury or damage resulting from the use of this document or the information contained in it ( ©ALPHASENSE LTD ) Doc. Ref. TDS/4-20mA/Issue 12

4-20mA Transmitter Boards - Alphasense - #2

Gas sensor, Carbon dioxide sensor, Nitrogen monoxide sensor, Oxygen sensor, Sensor