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Transmitter LKM 154
LKM 154

Programmable connection head transmitter for Pt100/Pt1000 and thermocouples with a variety of output signals an an LCD Display

 

The LKM 154 is a programmable transmitter for Pt100/Pt1000 and various thermocouples with an LCD display installed in a special connection head. It converts the temperature signal linearily with high accuracy into a standard current signal or an output voltage. A battery variant without an output signal is also available. The LKM 154 can be integrated with temperatue sensors using an M12 connection thread to form a complete measurument module. For the range an adjustment capability of at least 20°C is required. The transmitter can be configured by the customer using a programming module that can be obtained

separatly. No recalibration is required. The output signals can similary be scaled as required. Using this programming module

it is also possible to record the measurement data digitally with a PC. The different variants are identified by an additional letter. We can also supply complete temperature sensors with this transmitter.

 

 

Construction

U- Display and output signal 0...10V, serial interface (external voltage supply 24 V)

I- Display and Output 4...20 mA, serial Interface (Voltage supply from loop)

B- Display (Voltage supply 9V battery, shutdown after 5 min.)

Connection head

BUZH

Connection head

BUZH

Protection classification

IP 65 according DIN 60529

Input

Pt100

Pt1000

Thermocouple Typ K

Thermocouple Typ T

Thermocouple Typ J

Thermocouple Typ S

on inquiry

Circuitry

2 wire circuit

3 wire circuit

4 wire circuit

Output

0 ... 10V

4 ... 20mA

Measuring range

Typ K -200°C ... +1370°C

Typ T -200°C ... +400°C

Typ J -200°C ... +1200°C

Typ S 0°C ... +1760°C

Pt100/Pt1000 -200°C ... 835°C

Range

domain of definition of sensor, minimal 20°C *

Zero point

as defined for the sensor*

Resolution

0.1°C/1°C° *

Display

LCD 5-digit, 10mm caracter height, rotatable

Test current

0.2mA

Test current

0.2mA

Sensor fracture

approx. 11V for voltage output

approx. 21 mA for current loop

Shorted Sensor

at resistance sensors approx. 0V for voltage output and approx 3 mA for current loop;

Temperature value on fracture point for thermocouples

Permissible ripple

< 10 %

Messgenauigkeit

0,5°C±1Digit

Accuracy

0.2°C±1Digit for resistance sensors

0.5°C for thermocouples

0.2°C ±1Digit for resistance sensors

0.5°C for thermocouples

Accuracy

0.2°C±1Digit for resistance sensors

0.5°C for thermocouples

0.2°C ±1Digit for resistance sensors

0.5°C for thermocouples

Temperature drift

<150ppm/°C

Operating temperature range

0°C ... +60°C

Mounting

Thread M24x1.5

Power supply

3.3V Lithium (CR123)

Supply voltage

24VDC ±30% reverse protection

Sampling rate

>0.25/s*

Battery operation time

>1000h on automatic switch off after 3 min *

Features

Maximum, Minimum, Hold

Weight

approx. 290g

Interface

USB

cold-junction compensation

internal


* programmable

11/2016 technical changes are reserved
Request

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