The Laureate Model SG is UL-listed digital 5-digit panel meter for strain gauges, whose output is a changing resistance. Strain gauges with a 20 mV output can be scaled to display up to 10,000 counts, while a 200 mV output can be scaled to 99,999 counts to read directly in engineering units, such as Lbs. Accuracy is an exceptional 0.01% of full scale ± 1 count. The meter read rate can be up to 60/second.

A stable reading in electrically noisy environments is achieved by an adaptive moving average filter, which filters out noise yet responds quickly to actual changes in signal level.

Three scaling methods are selectable: scale and offset, two-point method, and system-level calibration using actual transducer signals.

A built-in, isolated excitation supply with selectable 5, 10, and 24 Vdc outputs is standard to power bridges and other potentiometric transducers, where the output is a changing resistance. The isolated 10 Vdc, 120 mA excitation output can power up to four 350 ohm bridges in parallel. When powering strain gauges or potentiometers, the excitation output is monitored by the meter to eliminate errors caused by variations in the excitation voltage.

The peak value of the input signal is automatically captured and may be displayed via a front panel pushbutton command or a control signal at the rear connector since the last meter reset.

Options include dual relays for control or alarm, isolated 4-20 mA and 0-10V analog outputs, and an RS232 or a dual-connector RS485 port for data communications with a host computer or PLC. Modbus RS485 is fully supported.

The base price is $220. For more information and pricing of options, visit www.laurels.com/process.htm