THERMOMETER LB-522T 


  • functions: thermometer
  • measurement: temperature
  • built in LCD display
  • wide scope of temperature measurement
  • battery powered
  • optional sensors for different media
  • optional digital result transmission to long distances

Termometr LB-522T

DESCRIPTION

Thermometer LB-522T with a built in LCD display is designed for measurement of air temperature or different medium. It is especially recommended for places where there is high humidity (i.e. freezers, coolers) since it is possible to attach it with an outside sensor resistant to humidity's influence.

The device in a standard version has an inside sensor for temperature measurement (thermometric resistor Pt1000). Optionally, the outside sensor is connected with a meter using a cable of 1...10 m in length (depending on user requirements). In a version with an outside temperature sensor the device is designed for temperature measurement of different mediums in the scope -100...+200°C or (in "E" version) in the scope -200...+550°C according to information provided in technical data "extensions". The thermometer has a minimum and maximum memory function. 

It is a portable device of small size powered from a built in long lasting lithium battery. It is characterised by modern construction based on efficient and energy saving microprocessor servo. Basing on the knowledge of non-linear temperature sensor characteristics and digital calibration data stored during calibration in the device memory the microprocessor built in the device calculates the actual temperature measurement results.

The following measurement results are presented on a big easy to read LCD display and can be sent out from the device through a digital current loop interface approximately every 2 seconds. The output interface beside data transmission can also be used for powering the thermometer – using for this purpose a two cable line (i.e. telephone type) where polarity of attaching the interface cables is random.

The device 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 the 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. 

Each thermometer can have an individual calibration certificate issued by the LAB-EL Calibration Laboratory.

TECHNICAL DATA

TEMPERATURE MEASUREMENT
Measurement inaccuracy +/- 0,1°C  +/- 1 last digit, in the scope 0 .. +50°C 
+/- 0,2°C  +/- 1 last digit, in the scope -30 .. +50°C 
+/- 0,6°C +/- 1 last digit, in the scope -100..+200°C
+/- 1,2°C +/- 1 last digit, in the scope -200..+550°C
Scope of measurement -30..+80°C with an inside temperature sensor - LB-522T
-100..+200°C with an outside temperature sensor (special) - LB-522TX
-200..+550°C with an outside temperature sensor (special) - LB-522TXE
Measurement resolution 0,1°C in the scope -199,9...+199,9°C
1°C outside of the scope -199,9...+199,9°C
RECOMMENDED CONSTANT WORK CONDITIONS *)
Scope of temperatures 0..40°C
Scope of humidity 20..80%
Level of environment corrosion aggressiveness accord. w/g PN-71/H-04651 B
*) 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).
POWER SUPPLY, MECHANICAL DATA
Power supply source 3,6V / 2,1 Ah inside power supply - lithium battery
5...28V DC, 1 mA optional outside power supply - emulation LB-710
Work time from a battery 5 / 10 years measurement period: 1 minute / 1 hour
Overall dimensions 110 x 65 x 28 mm casing material ABS
Casing airtightness IP30  

INTERFACE

Transmission parameters: in accordance with RS232C, 300 bps, 7 bits of information, without evenness control, 1 stop bit, working in a standard of digital current loop.
INTERFACE FUNCTIONS

OVERALL DIMENSIONS

EXTENDED VERSIONS

The following thermometer versions are available upon a special order: Attention: The measurement scope provided can be additionally limited by parameters of the outside sensor used.
GOOD CLIMATE IS FAVORABLE
Elektronika Laboratoryjna Produced by: LAB-EL Laboratory Electronics
68b, Bodycha Str., 02-495 Warsaw
tel: (022) 667 71 18, 0601 209656, fax: (022) 867 53 32
e mail: info@label.com.pl
home page: http://www.label.com.pl
internet meteorological station: http://www.meteo.waw.pl
meteorological station on a mobile phone: wap.meteo.waw.pl
Last updated: 07.05.2004
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