Westlock transmitter options combine local visual display with remote electronic signalling for continuous flow device status. Point-to-point limit switch signalling is integrated with on-site visual monitoring and full range analog position transmission in one compact NEMA 4 or explosion-proof enclosure.
* RS: A 1000 or 10 000 Ohm analog-resistive output proportional to valve position.
* CS: A 4-20 or 10-50 mA analog current output proportional to valve position. The CS current transmitter features the latest technology in transmitter design and operates with one of the lowest operating voltages in the industry (5 V d.c.) with a maximum load resistance of 1650 Ohm at 38 V d.c.
The RS and CS options monitor valves throughout a 0-100% range. At full open or closed, switches will confirm end position limits.
The Westlock dual display monitor allows a user the flexibility to design a user the flexibility to design a valve monitoring system around processing requirements as the need for additional information is required. The full range AccuTrak offers design and operating personnel the following distinct advantages:
* 0-100% readout of valve travel is continuously monitored by an analog output signal. By combining an analog current output signal with two limit switches, the AccuTrak now offers complete travel range display, accuracy and speed or response. Additionally, a 1000 Ohm resistive analog output, proportional to valve position, can be provided for continuous remote monitoring, trend analysis, or computer interface.
* Limit switches for positive end position monitoring of valve travel.
* Local mechanical display of valve position throughout the full range of travel.
The 4-20 mA transmitter is a precision analog position transmitter that operates on any voltage from 5 to 38 V d.c. It is reverse polarity, fuse and transient protected, is easy to set up, noninteractive adjustment. CW and CCW rotation is easily accommodated. Available in two and four-wire configurations with 4-20 or 10-50 mA outputs, it accommodates long cable runs and multiple receivers. There is an easy to change fuse and a choice between proximity sensors or mechanical switches.
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