H-27X Submodules - measurements of thermocouples, pressure sensors, thermoresistance, etc., installed into LTR27

Submodules - measurements of thermocouples, pressure sensors, thermoresistance, etc., installed into LTR27
  • Galvanic isolation of each channel
  • Designed to work as a part of LTR27 modules
  • Each measuring channel has an individual integrating ADC

H-27x daughterboards together with the LTR27 module allow to create measuring systems with individual galvanic isolation between measuring channels.

The possibility of simultaneous installation of different types of submodules provides a flexible configuration by number and type of measuring channels.

Each measuring channel has an individual integrating ADC based on a voltage-frequency converter.

All H-27x submodules have by-channel galvanic isolation of the input signal circuits.

Н-27I-5 – current meter

Provides galvanically isolated connection of two sources with output normalized current signal in the range of 0...5 mA - for example, industrial sensors: pressure, temperature, displacement, etc.
The construction of measuring circuits based on current meters is the most noise-resistant technical solution recommended for use in conditions of a high level of industrial noise.
Number of channels 2
Current measurement range 0…5 mA
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±7,5 mA
Input impedance 392±4 Ohm

Н-27I-10 – current meter

Provides galvanically isolated connection of two sources with output normalized current signal in the range of -10...+ 10 mA - for example, industrial sensors: pressure, temperature, displacement, etc.
The construction of measuring circuits based on current meters is the most noise-resistant technical solution recommended for use in conditions of a high level of industrial noise.
Number of channels 2
Current measurement range -10…+10 mA
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±15 mA
Input impedance 100±1 Ohm

Н-27I-20 – current meter

Provides galvanically isolated connection of two sources with output normalized current signal in the range of 0...20 mA or 4...20 mA - for example, industrial sensors: pressure, temperature, displacement, etc.
The construction of measuring circuits based on current meters is the most noise-resistant technical solution recommended for use in conditions of a high level of industrial noise.
Number of channels 2
Current measurement range 0…+20 mA
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±30 mA
Input impedance (сопротивление токонагрузочного резистора) 100±1 Ohm

Н-27T – millivolt signals meter

Has two galvanically isolated measuring channels with an asymmetric millivolt range, adapted for direct connection and measurement of signals from thermocouples; can be used to measure the voltage drop across current shunts in DC current measurement schemes of low-voltage circuits that are not connected with the primary ~220 V network.
Number of channels 2
Voltage measurement range -25…+75 mV
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±2 V
Input impedance More than 10 MOhms when switched ON,
not less than 100 kOhms when switched OFF
(at the operating range -25 mV ... 75 mV),
at least 2 kOhms when switched OFF
(at the range ± 2 V)

Н-27R-100 – thermoresistances meter

Specialized single-channel submodule for direct galvanically isolated four-wire connection and measurement of 50 Ohm thermoresistances.
Number of channels 1
Resistance measurement range 0…100 Ohm
Limit of basic reduced (to the final value of the measuring range of resistance) error ±0,05 %
Built-in precision current source Inom.=1,6 mA
Input type Isolated 4-wired

OP-27TR – cold junction sensor-compensator

The temperature sensor is a thermoresistance with a nominal value of 50 Ohm. It is installed independently in the area of cold junctions of thermocouples.
An OP-27TR option is a sensor - cold junction compensator, which is used in conjunction with H-27R-100.
The sensor data is read by the user's application software as indications of a separate measuring channel and is used for processing data taken from thermocouples by other measuring channels, which is realized by installing submodules H-27T.
Sensor type Copper resistance thermometer with nominal static characteristic 50М
Temperature measurement range -50…+150 °C
Measurement accuracy 0,5 °C

Н-27R-250 – thermoresistances meter

Specialized single-channel submodule for direct galvanically isolated four-wire connection and measurement of 100 Ohm thermoresistances.
Number of channels 1
Resistance measurement range 0…250 Ohm
Limit of basic reduced (to the final value of the measuring range of resistance) error ±0,05 %
Built-in precision current source Inom.=1,6 mA
Input type Isolated 4-wired

Н-27U-01 – voltage meter

Measuring transducer with integration type. Provides interference-proof galvanically isolated connection of two sources with an output slowly varying signal in the range from -1 to +1 V.
Number of channels 2
Voltage measurement range -1…+1 V
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±15 V
Input impedance more than 10 MOhms when switched ON,
not less than 12 kOhms when switched OFF

Н-27U-10 – voltage meter

Measuring transducer with integration type. Provides interference-proof galvanically isolated connection of two sources with an output slowly varying signal in the range from -10 to +10 V.
Number of channels 2
Voltage measurement range -10…+10 V
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±15 V
Input impedance more than (1,02 ± 0,02) MOhm when switched ON,
not less than 900 kOhm when switched OFF

Н-27U-20 – voltage meter

Measuring transducer with integration type. Provides interference-proof galvanically isolated connection of two sources with an output slowly varying signal in the range from 0 to 20 V.
Number of channels 2
Voltage measurement range 0…+20 V
Limit of basic reduced (to the final value of the measuring range of the input signal) error ±0,05 %
Input type of each channel Isolated 2-wired
Maximum allowable value of the input signal (input protection) ±35 V
Input impedance more than (1,02 ± 0,02) MOhm when switched ON,
not less than 900 kOhm when switched OFF

 

Notes:

1. The strength of galvanic isolation (test voltage for 1 min - 300 V 50 Hz relative to the ground circuit, - 150 V 50 Hz between channels for two-channel submodules) allows to apply H-27x for the tasks of low-voltage galvanic isolation of measuring circuits and does not allow to apply H-27x for connection to primary circuits ~ 220 V.

2. The measuring range of H-27U, H-27T, H-27I submodules can be increased if external add-on resistors are used in the measuring circuit and in case of user calibration of the changed measuring scale. Details of such application for H-27U, H-27T, H-27I submodules for your measurement task can be specified by L-CARD technical support.

  • H-27I-5
    Current meter: 2 channels, 0:5 mA
  • H-27I-10
    Current meter: 2 channels, ±10 mA
  • H-27I-20
    Current meter: 2 channels, 0:20 mA
  • H-27T
    Thermocouples signals meter: 2 channels, -25 mV ... +75 mV
  • H-27R-100
    Thermoresistance meter: 1 channel, 0...100 Ohm
  • OP-27TR
    Компенсатор холодного спая: -50...+150 ± 0,5° C (опция для субмодуля H-27R-100)
  • H-27R-250
    Thermoresistance meter: 1 channel, 0...250 Ohm
  • H-27U-01
    Voltage meter: 2 channels, ±1 V
  • H-27U-10
    Voltage meter: 2 channels, ±10 V
  • H-27U-20
    Voltage meter: 2 channels, 0...20 V

Descriptions

  • ltr27api_en.pdf (filesize: 333 882 bytes, date: 19.02.2018)

    LTR27 module. Programmer's Guide.

  • ltrapi_en.pdf (filesize: 604 618 bytes, date: 15.02.2018)

    Ltrapi basic library. Programmer's Guide.

  • ltr_cross_sdk_en.pdf (filesize: 551 553 bytes, date: 13.02.2018)

    Description of the software for Windows, Linux, FreeBSD and QNX.

  • ltr_en.pdf (filesize: 11 066 427 bytes, date: 25.12.2017)

    LTR modular DAQ system. User's Guide (revision 3.1.0).

    • General characteristics and principles of construction
    • Working with LTR crate
    • Overview of LTR crate architecture
    • LTR11 ADC module
    • LTR212 (M) strain measurements modules
    • LTR27 measuring module
    • LTR41, LTR42, LTR43 digital I/O and synchronization modules
    • LTR51 frequency meter module
    • LTR22 ADC module
    • LTR24 (-1, -2) ADC modules
    • LTR25 ADC module
    • LTR34 DAC module
    • LTR35 DAC module
    • LTR114 ADC module
    • LTR210 ADC module
    • LTR00 Dummy module
    • Low-level programming of LTR-EU crate
    • Specification
  • ltr_soft_getting_started_en.pdf (filesize: 269 974 bytes, date: 13.02.2018)

    Starting to work with DAQ system LTR. Questions about the software.

LGraph2 software package

  • lgraph2.zip (filesize: 26 783 707 bytes, date: 19.03.2021)

    LGraph2 is a free multi-channel data recorder for Windows. Version 2.35.16 provides the possibility of simultaneous data visualization and recording from the ADCs: L-502, L-780M, L-783, L-791, E-502, E14-140, E14-140M, E14-440, E-154, E20-10, LTR11, LTR114, LTR27, LTR212, LTR216, LTR22, LTR24, LTR25, LTR51. It requires an updated version of the LComp driver (from version 01.04.2010) and ltrserver (no lower than 1.5.2.1).

Software for Windows

  • lcard-opc-setup.exe (filesize: 12 440 520 bytes, date: 09.04.2019)

    OPC DA Server for L Card data acquisition modules and LTR crate system. Version 1.0.10.

  • lcomp.exe (filesize: 6 342 096 bytes, date: 20.01.2021)

    Beta version. LCOMP library for Windows XP/Vista/Win7/Win8/Win10 32 and 64-bit versions with drivers. The installer and drivers are digitally signed. The library is built on the basis of modern WDM-drivers rewritten on WDF. It includes the WDM driver itself for L-CARD hardware, the DLL library with source code, programming examples, electronic description, etc. The LCOMP library provides support for almost the entire range of products: PCI boards, USB modules. ISA support is excluded.

    The library includes “L-Graph I” software. L-Graph I supports the following devices: L-1450, L-761, L-780, L-783, L-791, E14-140, E-154 and E14-440. Files recorded by L-Graph I can also be read and processed using the demo-version of PowerGraph v.3.X.

  • ltrdll.exe (filesize: 1 293 128 bytes, date: 12.01.2021)

    Libraries for working with LTR crates and modules. Version 1.32.22.

Contacts

Phone: +7 (495) 785-95-19
Fax: +7 (495) 785-95-14

Sales department: en@lcard.ru
Technical support: en@lcard.ru

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Moscow 117105
Russian Federation

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