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Laboratory Electronics

Two-channel ELECTRONIC THERMOMETER LB-708T 


  • functions: two channel thermometer
  • measurement: temperature, temperature difference
  • usage: drier, drying control
  • stationary device
  • big, easy to read display
  • interface RS232C

Termometr LB-708T

DESCRIPTION

Thermometer LB-708T is a device which displays the measurement results from two independent measuring circuits interchangeably with a calculated difference between both of them. An example way in which the thermometer can be used is a drying process control. Its run is expressed through temperature difference between air intake and air outlet in a drier.

The temperature measurements are performed using attached to the device two outside sensors with a platinum thermoresistor Pt1000 (or optionally Pt100). Using the platinum thermoresistor assures high measurement accuracy and stable characteristics. The outside temperature sensors are made in a standard or in special casings adjusted in construction to individual client requirements. Different sensor casing versions allow on measurement of different mediums in various scope of temperatures. The temperature sensors are attached to the thermometer's panel using plugs type 2RM14KPN4G1.

Temperature measuring path is calibrated by a producer and calibration data is stored in a digital form in the panel. The thermometer does not have any mechanical calibration elements (i.e.: potentiometers). The calibration of the device is performed by sending calibration data obtained in the model climate conditions through a digital interface to a non-volatile memory of the device. It guarantees comfort and high calibration accuracy as well as stability of the device's meteorological parameters in time.

Through a series voltage interface RS232C the thermometer can be attached to any computer system what allows on remote collection of the current measurement results.

The device is designed to be used in stationary conditions, its casing has special strikers that allow on hanging on a wall. Big, easy to read LED display allows on showing interchangeably: two temperatures or their difference. The device is powered from a power supply network of 230V.

The thermometer with the temperature sensors (upon request) can have an individual calibration certificate issued by the LAB-EL Calibration Laboratory or the Energy Institute in Warsaw.

TECHNICAL DATA 

TEMPERATURE MEASUREMENT
Version Scope of measurement Measurement inaccuracy with individual sensor calibration
Measurement inaccuracy without individual sensor calibration
basic -40..150°C +/- 0,1°C, +/- 1 last digit +/- 0,5°C, +/- 1 last digit
extended -150..240°C +/- 0,2°C, +/- 1 last digit +/- 1°C, +/- 1 last digit
-200..550°C +/- 1°C, +/- 1 last digit +/- 5°C, +/- 1 last digit
MEASUREMENT READINGS
Parameter Scope of readings Resolution
Temperature – basic scope -40..+150°C 0,1 or 1°C
Temperature – extended scope -200..+550°C 1°C
Temperature difference -999..+999°C 0,1 or 1°C
POWER SUPPLY
Network power supply
230V 50 Hz
Energy consumption 10 VA
SCOPE OF WORK TEMPERATURES
Device Scope Comments
Panel LB-708T 0..+40°C
Temperature sensors
-40..+150°C basic scope, limited additionally by a temperature sensor's construction
-200..+550°C extended scope, limited additionally by a temperature sensor's construction
RECOMMENDED CONSTANT WORK CONDITIONS LB-708T*)
Scope of temperatures 10..40°C
Scope of humidity 20..80%
Level of environment corrosion aggressiveness accord. PN-71/H-04651 B
Class of resistance according to DIN40050  IP40
*) Going beyond recommended constant work conditions (i.e. when installing the device in the open space) requires using additional protection means for the device's electronic part so that water out dropping does not start inside of the device (using additional outside casing).

INTERFACE

Series RS232C, 2 lines (RxD, TxD, GND), switching on the interface power supply - active line RTS status form a computer, transmission parameters: 9600 bps, 8 bits of information, without evenness control, 1 stop bit.

OVERALL  DIMENSIONS

  • Panel casing (to be hanged on a wall) of overall dimensions: 180 x 130 x 106 mm.

EQUIPMENT

  • interface RS232C cable,
  • program “User interface” for a computer.
GOOD CLIMATE IS FAVORABLE
Ocena produktu
Two-channel electronic thermometer LB-708T; thermometer LB-708T is a device which displays the measurement results from two independent measuring circuits interchangeably with a calculated difference between both of them. An example way in which the thermometer can be used is a drying process control. Its run is expressed through temperature difference between air intake and air outlet in a drier.
Ocena: 5/5, liczba głosów: 14
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