- functions: two channel thermometer
- measurement: temperature, temperature difference
- usage: drier, drying control
- stationary device
- big, easy to read display
- interface RS232C
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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.
| 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 |
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| RECOMMENDED CONSTANT WORK CONDITIONS LB-708T*) |
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|---|---|
| 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 |
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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: 12.10.2005 |
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