Model L40 is a low-cost, universal meter for 65 user-selectable analog input signal types and ranges. These include DC voltage and current, AC RMS voltage and current, process signals (4-20 mA, 0-10V), thermocouple (10 types, °C or °F), RTD (6 types, °C or °F), thermistors (NTC or PTC), resistance (0-5k or 0-50k ohms), and potentiometer inputs. The same meter handles all of these signal types with no need for a plug-in signal conditioner board. The meter's universal power supply accepts voltages from 18V to 265V, AC or DC, so that power can be 24 Vdc or AC power in any country. The meter conforms to the popular 1/8 DIN size standard and features four 14.2 mm (0.56") high red LED digits. The display is user scalable for input types other than temperature.L40 range selection jumpers

The base L40, as shipped by Laurel, is set up so that a 400 Vac input reads 400. To change to another signal type or range, pry off the meter faceplate, push out the electronics, and place jumpers as illustrated in the manual. The jumper positions are well labeled, and the jumpers have a large, easy-to-grasp handle. Also make software selections using front panel keys. If you want Laurel or your distributor to set jumpers and do the front panel programming for you, order the FS option.

Extensive software features add flexibility to this low cost meter. Programmable features include five levels of display brightness, min and max capture, dual scaling selectable by an external control input, a deadband around 0 for AC measurements, a moving average digital filter, a "count by" function, hysteresis for alarm operation, a user-configurable fast access menu, and selectable password protection. Further flexibility is provided by 1 or 2 optional output boards, which can be added at any time.

An Option 1 board can plug into the display board. This can be a single 8A relay board, an isolated active or passive 4-20 mA analog output board, or an isolated Modbus compatible RS485 serial data output board.

An Option 2 board can plug into the Option 1 board if installed. This is another single 8A relay board. For example, this board allows an L40 to have and analog output and a relay output, or to have two relay outputs.

L40 meter circuit boards

If only a single meter is to be stocked for a large number of applications, the low-cost L40 is your choice. While this meter does not match the high accuracy, speed and programmable features of our Laureate series, it is perfect for many panel meter applications.

User-selectable ranges

  • DC voltage: ±60.0 mV, ±200.0 mV, ±2.000V, ±20.00V, ±200.0V, ±400V
  • DC current: ±20.00 mA, ±5.00A
  • AC RMS voltage: 60.0 mV, 200.0 mV, 2.000V, 20.00V, 200.0V, 400V
  • AC RMS current: 20.00 mA, 5.00A AC
  • Process: 4-20 mA, 0-10V with 15V, 30 mA excitation output
  • Thermocouple types: K, J, E, N, L, C, R, S, B, T
  • RTD types: Pt100, Pt500, Pt1000, Ni100, Ni200, Ni1000
  • Thermistor types: NTC, PTC
  • Resistance: 0-5.000 kΩ, 0-50.00 kΩ
  • Potentiometer input: 500Ω to 20 kΩ

Options

  • 1 or 2 mechanical relays, 8A, 250Vac
  • Isolated analog output
  • RS485 Modbus RTU data output




    Standard Features

    • Universal power: 18 Vac/dc to 265 Vac/dc
    • 1/8 DIN case with 3 front panel keys
    • Display: 4 red LED digits, 14.2 mm (0.56")
    • Typical accuracy: 0.2% of full scale
    • Removable screw-clamp connectors
    • External control input

    Specifications

    DC Voltage & Current

    RangeResolutionInput ResistanceMax SignalAccuracy
    ±60.0 mVdc 0.1 mV 1 MΩ 3 Vdc < 0.25% FS
    ±200.0 mVdc 0.1 mV 10 kΩ 30 Vdc < 0.20% FS
    ±2.000 Vdc 1 mV 100 kΩ 100 Vdc < 0.20% FS
    ±20.00 Vdc 0.01V 1 MΩ 150 Vdc < 0.20% FS
    ±200.0 Vdc 0.1 V 12 MΩ 800 Vdc < 0.20% FS
    ±400 Vdc 1 V 12 MΩ 800 Vdc < 0.20% FS
    ±20.00 mAdc 0.01 mA 4.7 Ω 25 mAdc < 0.15% FS
    ±5.00 Adc 10 mA 20 mΩ 7 Adc max 7 sec < 0.25% FS

    AC RMS Voltage & Current

    RangeResolutionInput ResistanceMax SignalAccuracy
    60.0 mVac 0.1 mV 1 MΩ 3 Vac < 0.3% FS
    200.0 mVac 0.1 mV 10 kΩ 30 Vac < 0.3% FS
    2.000 Vac 1 mV 100 kΩ 100 Vac < 0.3% FS
    20.00 Vac 0.01V 1 MΩ 150 Vac < 0.3% FS
    200.0 Vac 0.1 V 12 MΩ 800 Vac < 0.3% FS
    400 Vac 1 V 12 MΩ 800 Vac < 0.3% FS
    20.00 mAac 0.01 mA 4.7 Ω 25 mAac < 0.5% FS
    5.00 Aac 10 mA 20 mΩ 7 Aac max 7 sec < 0.5% FS
     

    Process Signals

    RangeScalingInput ResistanceMax SignalAccuracy
    4-20 mAdc -1999 to 9999 4.7 Ω 25 mA < 0.15% FS
    0-10 Vdc -1999 to 9999 1 MΩ 25 Vdc < 0.20% FS
     
     

    Platinum and Nickel RTD Temperature Probes

    RTD TypeRange °CRange °FExcitationAccuracy
    Pt100 -200 to 700°C -328 to 1292°F < 900 µA, 2 or 3-wire < 1°C
    Pt500 -150 to 630°C -238 to 1166°F < 90 µA, 2-wire < 1°C
    Pt1000 -190 to 630°C -310 to 1166°F < 90 µA, 2-wire < 1°C
    Ni100 -60 to 180°C -76 to 356°F < 900 µA, 2-wire < 1°C
    Ni200 -60 to 120°C -76 to 248°F < 900 µA, 2-wire < 1°C
    Ni1000 -60 to 180°C -76 to 356°F < 90 µA, 2-wire < 1°C
     

    Thermocouple Temperature Probes

    TC TypeRange °CRange °FAccuracy
    Type K -100 to 1350°C -148 to 2462°F < 3°C
    Type J -100 to 1200°C -148 to 2192°F < 3°C
    Type E -100 to 1000°C -148 to 1832°F < 3°C
    Type N -100 to 1300°C -148 to 2372°F < 3°C
    Type L -100 to 900°C -148 to 1652°F < 3°C
    Type T -100 to 400°C -148 to 752°F < 3°C
    Type R 0 to 1768°C 32 to 3214°F < 3°C
    Type S 0 to 1768°C 32 to 3214°F < 3°C
    Type B 700 to 1828°C 1292 to 3322°F < 5°C
    Type C 0 to 2300°C 32 to 4172°F < 5°C

    NTC Thermistors (negative temperature coefficient)

    R25 ValuesBeta ValuesResolutionAccuracy
    100Ω to 100.00 kΩ 2000 to 5500 1° or 0.1°, °C or °F < 1.5% of reading
     

    PTC Thermistors (positive temperature coefficient)

    Main SeriesRange °CRange °FAccuracy
    KTY-121 -55 to 150°C -67 to 302°F < 1°C
    KTY-210, KTY-220 -55 to 150°C -67 to 302°F < 1°C
     

    Resistance

    RangeResolutionBias CurrentAccuracy
    0 to 5 kΩ 1 Ω 926 to  64 µA < 0.5% FS
    0 to 50 kΩ 10 Ω 86 to  20 µA < 0.5% FS

    Potentiometer

    Potentiometer RangeDefault ScalingPotentiometer ResistanceAccuracy
    0 to 100% 0 to 100.0 500Ω to 20 kΩ < 0.5% of FS

    Applicable to All Signal Types

    Display
    Digital readout 4 red LED digits, 7-segment, 14.2 mm (.56") digit height, 5 brightness levels
    Display range -1999 to 9999
    Update time 300 msec
    Sensor break indication Display of "h.ovr" for overrange, "h.udr" for underrange
    Indicator lamps 2 red LED alarm indicators
    Power
    Universal voltage 18 to 265 Vac/dc
    Power consumption < 1.5W meter only, < 2.5W meter with options
    Isolation 2500 Vrms
    Excitation output 5V or 15V @ 30 mA (jumper selectable)
    Analog Output (AOT option for slot 1)
    Output level 4-20 mA, active or passive (selectable at connector)
    Maximum load 350Ω active, 700Ω passive
    Scaling Zero and full scale adjustable from -1999 to +9999 counts
    Accuracy < 0.5% FS
    Update time 400 ms
    Isolation 1000 Vdc
    Relay Outputs (RL1 option for slot 1 or RL2 option for slot 2)
    Relay type Single 3-contact relay (NC, NO, common)
    Current rating 8A at 250 Vac
    Isolation 2500 Vrms
    RS485 (RS485 option for slot 1)
    Protocol Modbus RTU
    Programmable addresses 1-247
    Supported function code 4 = "read the register"
    Data rates 9600 or 4800 baud
    Isolation 1000 Vdc
    Signal Connections
    Dimensions
    Environmental
    Operating temperature 0°C to 50°C
    Storage temperature -20°C to 70°C
    Datasheet, Manual, Mechanical and Serial I/O info.
    Manufacturer site:

    https://www.laurels.com/L40.php

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    L40 Low-Cost, Universal Analog Input Digital Panel Meter

    • 105.90€


    Available Options


    Tags: Panel Meter; Laureate; Laurel Electronics, Low cost