The Laurel Laureate™ RTD panel meter is factory calibrated for four Resistance Temperature Detector (RTD) types: 100-ohm platinum (Pt100) with DIN
alpha of 0.00385, 100-ohm platinum (Pt100) with ANSI alpha of 0.003902, 10-ohm copper with alpha of 0.00427, and 120-ohm nickel with alpha of 0.00672.
The entire span of each RTD type is presented in a single range. The RTD type, unit of measure (°C or °F) and resolution (1°, 0.1° or 0.01°) are
selectable from the front panel or via the meter's serial interface. Display in Kelvin or Rankin is selected by offsetting the Celsius or Fahrenheit
ranges. Typical accuracy is ±0.1°C (±0.2°F).
RTD connections can be via 2, 3 or 4 wires. With 3 or 4-wire connections, the meter automatically compensates for changes in lead resistance to the
sensor. With 2-wire connection, the meter can measure and then subtract the lead wire resistance.
All ranges for all RTD types are digitally calibrated at the factory, with calibration factors stored in an EEPROM on the signal conditioner board. This
allows temperatures sensors and signal conditioner boards to be changed in the field without recalibrating the meter.
High read rates at up to 60 or 50 conversions per second while integrating the signal over a full power cycle are provided by Concurrent Slope analog-to-digital
conversion. High read rates are ideal for peak or valley capture, real-time computer interface, and control. Peak and valley values are standard. These may be
displayed via a front panel push button command or a control signal at the rear connector, or be transmitted as serial data.
Digital filtering is selectable for electrically noisy environments or resolution to 0.01°, including a batch averaging filter and an adaptive moving average
filter which provides a choice of 8 time constants from 80 ms to 9.6 s. When a significant change in signal level occurs, that filter adapts by briefly switching
to the shortest time to follow the change, then reverts back to the selected time constant. In a selectable Auto filter mode, the filter time constant is
automatically selected based on detected signal noise.
The Laurel Laureate RTD panel meter is designed for system use. Optional plug-in boards for communications and control include Ethernet and other serial communication
boards, dual or quad relay boards, and an isolated analog output board. Laureates may be powered from 85-264 Vac Vac or optionally from 12-32 Vac or 10-48 Vdc. The
display is available with red or green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front
panel keys can be locked out for simplified usage and security. All power and signal connections are via UL / VDE / CSA rated screw clamp plugs.