4-Wire Transmitter

            The Peak-Hold Signal Conditioner SC21 operates in two modes. When terminals 5 and 6 are shorted, the unit operates in Track Mode; when they are open, it operates in Peak-Hold Mode. The differences between these two modes of operation are as follows:

            Peak-Hold Mode When the input value increases, the output increases accordingly; however, when the input value decreases, the output maintains its peak value rather than decreasing with the input. The output will only increase again once the input rises above its previous peak.

            Track Mode The input and output always fluctuate by the same amount.

            The Square Root Transmitter ST20 is square root computer. It is designed to solve the equation Q = C √ΔP where ΔP is the differential pressure across an orifice, and C is a constant relating the orifice plate to engineering units. Because ST20 does not use the curve segment, biased diode technique, it provides accuracy and resolution limited only by the stability and calibration of the orifice plate and its transmitter. The ST 20 output is a standard process current or voltage signal that is linearly proportional to flow.

            Totalizer TL95 accepts standard current or voltage input and produce a pulse signal that drivers a totalizing counter. The output frequency is linearly propotional to the input signal. The output pulse can be scaled to represent gallons, barrels, litres, tons, BTU, KW/H or any other engineering unit, by selection of the proper output span. The count dropout is adjustable from 0 % to 20 % of full scale to eliminate false totalization of unwanted low level noise signals.

            Digital Remote Setpoint RS20 This device controls the increase or decrease of an analog output signal using "UP" and "DOWN" push-buttons. Pressing the "UP" button causes the analog output value to gradually increase, while pressing the "DOWN" button causes it to gradually decrease; when neither button is pressed, the output remains at the last set value. The display scaling is programmable to suit specific application requirements. The RS20 is ideal for remotely adjusting setpoints for controllers, inverters, or PLCs.

            The Weight Transmitter WT95 is designed for industrial applications, where a simple electronic weighing systems is required and where analog signals are needed to control the level of contents in tanks and hoppers. WT95 is equally suited for use in hinged systems with only a single strain gauge load cell, as well as for systems with a number of load cells or weighing points. The voltage/current output signal can be used with analog or digital indicators, chart recorders, PLC and computers.

            Frequency Transmitter FT20 accepts pulse rate input from turbine meter, contact closures, proximity switch, magnetic shaft speed pickup and other frequency generating devices. Output is proportional to input frequency in standard current or voltage signal. Output ripple is less than 10 mv Peak-to-peak to meet requirements for direct input to a process computer.

            Signal Converter SC95 accepts any standard and many non-standard input signals and converts to any standard current or voltage signal. Low input resistance to current signals and high input resistance to voltage signals mean the signal converter can be inserted into existing system with no loss of performance. To minimize noise and other signal errors, the Signal Converter also features complete galvanic isolation of input, output and power supply.

            The Potentiometer Transmitter PT95 provides potentiometer excitation and produces a standard process output voltage or current linearly proportional to the position of the potentiometer wiper. The typical applications are position sensor, remote setpoint or indication of valve position.

            RTD Transmitter RT95 are compactly designed for converting the variations of resistance in a Pt100 temperature sensor to a linearized and isolated DC. voltage or current output. They provide constant current excitation and true lead length compensation when used with a 3-wire RTD, which can be located at a considerable distance from the transmitter.

            The thermocouple's signal is linearized and cold-junction compensated to provide an isolated and linearized DC. voltage or current output. Typically the Thermocouple Transmitter TT95 interfaces with recording, monitering or controlling instruments.