THERMOMETER LB-471T

functions: thermometer
measurement: temperature
designed for: measurement visualisation in industry
wide scope of temperature measurement
optionally a sensor for various media
measurement digital output

DESCRIPTION

Thermometer LB-471T is designed for temperature measurement of any media. The thermometer uses an outside temperature sensor Pt-100 (or upon request Pt-1000) attached using four or two cables. The panel is a stationary device of small size, network powered. Basing on the knowledge of non-linear sensor characteristics and digital calibration data stored during calibration in the device memory the microprocessor built in the device calculates the actual measurement results of relative humidity and temperature. The results are sent out from the device in a digital form to a supervisory system of the data collection.

The device is equipped with a digital current interface of time courses analogous with RS232C standard. The interface uses two cable connection where polarity of interface cable attachment is optional (maximum interface cable length is 2km). The output interface line is galvanicaly isolated from the measurement circuit. By using the device the interface can be attached to any supervisory system i.e. climate regulator LB-722, concentrator LB-731 (creating a monitoring system), panel LB-755, converter LB-486 or (by using a converter LB-371), to interface RS232C of any computer. It allows on remote and automatic measurement data collection.

The device does not have any mechanical regulation 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.

The panel LB-471T is equipped with a big easy to read LED display, which shows current temperature results. The panel is locked in a casing accommodated for assembly on a bus bar TS35. Those panels along with a series of panels LB-471P are designed for creating any tables displaying many measurement results in industrial conditions, after placing an adequate set of those devices in an additional casing with TS35 slats. Typical usage includes visualisation and monitoring of technological parameters during milk pasteurisation process in a dairy.

Each thermometer LB-471T with a temperature sensor can have an individual calibration certificate issued by the LAB-EL Calibration Laboratory.

TECHNICAL DATA

METEOROLOGICAL DATA
Temperature measurement	scope of measurement	-100...+200°C
	measurement uncertainty for one point calibration in the scope with 50°C width	+/- 0,2°C, +/- 1 last digit
	measurement uncertainty for one point calibration in the scope with 200°C width	+/- 0,8°C, +/- 1 last digit
	measurement uncertainty for two point calibration in the scope with 50°C width	+/- 0,1°C, +/- 1 last digit
	measurement uncertainty for two point calibration in the scope with 200°C width	+/- 0,4°C, +/- 1 last digit
Resolution	displayed in the scope -9,9...99,9°C	0,1°C
Resolution	displayed outside of the scope -9,9...99,9°C	1°C
Scope of work temperatures	measurement converter	-40..+80°C
	temperature sensor (standard)	-60..+90°C
	temperature sensor (special)	-100...+200°C (depending on a sensor version)
Measurement readings	temperature in the scope	-99,9..+199,9°C, resolution 0,1°C
	device serial number
	device technical status

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
Voltage	230V/50Hz	DC 24V (in a version upon request)
Energy consumption	2 VA

INTERFACE

Transmission parameters: time 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

TXD - constant measurement result transmission,
RXD - storing device calibration data in its non-volatile memory.

OVERALL DIMENSIONS, MASS, RESISTANCE CLASS

measurement panel LB-471T: 105 x 90 x of 60 mm, 250g, IP20. Attention: Panel casing for assembly on a bus bar TS35. The device should be installed inside an additional outside casing, i.e. wall switchgear. Climate category of additional outside casing has to be adjusted to conditions that control the installation place. The device is provided without cables (also without a power supply cable) as a component for installation only by an authorised person.
standard sensor: diameter 5.1 mm, length 100 mm,
special sensor: according to individual settlements.

EXTENDED VERSIONS

The following versions are available upon a special order:

LB-471TX - for cooperation with a sensor with a thermoresistor Pt1000.

GOOD CLIMATE IS FAVORABLE

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: 12.11.2004