THERMOMETER LB-710T

  • functions: thermometer
  • measurement: temperature
  • wide scope of work temperatures
  • optionally probes for different media
  • optionally version for 2...8 probes - LB-711
  • optionally interface LonWorks
 Termometr LB-710T

Description

Thermometer is a stationary device of small size, powered from an outside power supply. It is characterized by a modern construction based on efficient and energy saving microprocessor controller. Basing on the knowledge of nonlinear temperature sensor characteristics and digital calibration data stored during the calibration process in a device's memory - the microprocessor (built-in the device) counts the actual temperature measurement results. Those results are sent (in a digital form) from the device to a supervisory system of data collection.

The following versions are available:

  • LB-710TX - for cooperation with an external sensor with a thermoresistor Pt1000 (standard version),
  • LB-710TU - for cooperation with an external sensor with a thermoresistor Pt100,
  • LB-710TFn - in a version with an iternal sensor - for air temperature measurement, with one of the protection filters (standard version F3).

The device in a standard version LB-710TX consists of: a sensor used for temperature measurement (in a stainless steel pipe) which encloses a sensor (a thermometric resistor Pt1000) connected with a measurement converter by a cable of 1...10 m in length (depending on the client's requests). Thermometer LB-710TX is especially recommended for places where humidity is high (i.e. coolers, fridges) because the measurement probe is very resistant to moisture in its environment. Basing on the sensor construction it can be used for temperature measurement of different media in the scope of –100…+200°C.

 Other constructional LB-710TF is designed for air temperature measurement (i.e. in warehouses) is placing a sensor inside of a converter’s casing i.e. type that is used in a hytherograph LB-710.

The device is equipped with a digital current interface and its time course is analogous to the standard RS232C. The records for succeeding measurement results are sent outside of the device every 2 seconds. The output interface, except for data transmission is also used for powering the thermometer - using two-cable connection for this purpose (i.e.: telephone type) but the polarity of attaching the interface's cables is optional.

The device can be attached to any supervisory system using the interface, i.e. climate regulator LB-722, concentrator LB-731 (creating a monitoring system), panel LB-755, converter LB-486 or (using a converter LB-371) for the interface RS232C of any computer. It allows on remote control and automatic measurement data collection.

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 a non-volatile memory of 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.

Thermometer LB-710T is a less complex version (no humidity sensor) of the hytherograph LB-710, which received the certificate of type RP T 95 77 issued by the President of Central Measurement Office in Warsaw.

Technical data
METEOROLOGICAL DATA
Temperature measurement Maximum scope of measurement
-99,9...+199,9°C
Measurement inaccuracy for one point calibration *1) +/- 0,2°C,
+/- 1 last digit
Measurement inaccuracy for two-point calibration *1) +/- 0,1°C,
+/- 1 last digit
Measurement resolution
0,1°C - standard
0,01°C - optional
Scope of work temperatures
Measurement converter
-40...+85°C
Temperature sensor (standard) -60...+90°C
(with a shot – down connection cable )
Temperature sensor (special) -100...+200°C
(depends on the sensor version)
Measurement readings
temperature in the scope
-99,9...+199,9°C, 0,1°C
device serial number

device technical condition

*1) in the scope of width 50°C.
RECOMMENDED CONSTANT WORK CONDITIONS *2)
Scope of temperatures
0..40°C
Scope of humidity 20..80%
Level of environment corrosion
aggressiveness accord PN-71/H-04651		 B
*2) 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 (protecting the electronics with silicone or using additional external casing).
POWER SUPPLY
Scope of voltage
8...24V DC
Energy consumption 5 mA average
25 mA maximum

INTERFACE

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

INTERFACE FUNCTIONS
  • TXD - constant measurement result transmission and powering a thermometer,
  • RXD - storing device calibration data in its nonvolatile memory.

OVERALL DIMENSIONS

  • measurement converter: 145 x 64 x 35 mm,
  • standard probe: diameter 6 mm, length: 100 mm,
  • special probes: according to individual settlements.
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: 01.06.2006		 iso9001 pomiary