Laureate™ DC Voltage & Current
Digital Panel Meters
High accuracy, high read rate, control outputs

Standard Features

• 0.2, 2, 20, 200, 300V & 600V DC voltage ranges
• 2, 20, 200 mA and 5A DC current ranges
• All ranges factory calibrated
• 99.99% full scale accuracy
• 4-1/2 digit resolution to ±19,999 for readout in mV, V, mA or A
• 1 Gohm input impedance on 200 mV and 2 V scales
• Front panel scalable to ±99,999 for external current shunts
• Up to 60 conversions per second
• Peak or valley capture & display
• Selectable adaptive digital filter
• Selectable fixed zero or active least significant digit
• Universal AC power, 85-264 Vac
• 5, 10 or 24 Vdc excitation supply
• External controls for reset, meter hold and decimal points
• NEMA 4X, 1/8 DIN case
• Certified to UL 61010C-1 (UL mark), EN 61010-1 (CE mark), and RoHS)
  Options:
• Low voltage power: 10-48 Vdc or 12-32 Vac
• 2 or 4 output relays, electromechanical or solid state
• Analog output: Isolated, 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
• Serial communications: RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter

Laureate™ DC voltage and current panel meters with a DC signal conditioner board combine high accuracy with high read rate and a wide range of isolated output options for computer interface and control. Accuracy is 99.99% of full scale ±2 counts.

• DC voltmeter operation (selected by jumpers) provides and six full-scale voltage ranges from 200.00 mV with 10 mV resolution to 600.0 V with 100 mV resolution. The 200.00 mV and 2.000 V ranges provide a high input impedance of 1 Gohm to minimize the load on the voltage signal.
    
• DC ammeter operation (selected by jumpers) provides four full-scale current ranges from 2.0000 mA with 0.1 mA resolution to 5.000 A with 1 mA resolution. The 5.000 A range measures the IR drop across a built-in 10 milliohm current shunt.

All voltage and current ranges are factory calibrated, with calibration factors for each range stored in an EEPROM on the signal conditioner board. This allows ranges and signal conditioner boards to be changed in the field without recalibrating the meter.

External current shunts are fully supported. Scaling from full-scale millivolts, such as 50 mV or 100 mV, to amperes is easily accomplished from the front panel of the meter. The scalable readout is five full digits up to ±99,999 counts.

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 (US Pat 5,262,780) 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 automatically captured. These may be displayed via a front panel pushbutton command or a control signal at the rear connector, or be transmitted as serial data.

Digital filtering is selectable for electrically noisy environments, 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.

An isolated 5, 10 or 24 Vdc isolated excitation output is standard to power external transducers and transmitters. In many cases, this output can eliminate the need for an external power supply.

Designed for flexibility. Optional plug-in boards for communications and control include an analog output board, dual or quad relay boards, and serial communications boards. Laureates may be powered from 85-264 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.

Specifications