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WL 202

Fundamentals of Temperature Measurement

Technical Description

Recording temperature is one of the basic tasks in process and manufacturing automation. Electronic temperature sensors are the most widely used in automation applications but conventional thermometer types are still widely applied in many areas. The WL 202 experimentation set-up covers the full range of temperature measurement methods. As well as non-electrical measuring methods, such as gas- and liquid-filled thermometers and bimetallic thermometers, all typical electronic measuring methods are covered in the experiments. The electronically measured temperatures are displayed directly on programmable digital displays. A temperature-proportionate output voltage signal (0 - 10V) is accessible from lab jacks, enabling temperature characteristics to be recorded with, for example, a plotter. A digital multimeter with precision resistors is used to calibrate the electrical measuring devices. Various heat sources or storage units (immersion heater, vacuum flask and laboratory heater) permit relevant temperature ranges to be achieved for the sensors being tested. A plastic casing houses the sensors, cables, temperature measuring strips and immersion heater.

The well-structured instructional material sets out the technological fundamentals and provides a step-by-step guide through the measurements and experiments.

Learning Objectives / Experiments

- Learning the fundamentals of temperature

measurement by experimentation
- Familiarisation with the various methods, their

areas of application and special features:
+ non-electrical methods: gas- and liquid-filled

thermometers, bimetallic thermometers and

temperature measuring strips
+ electronic methods: thermocouple,

resistance temperature detector PT100,

thermistor (NTC)
- Determining air humidity with a psychrometer
- Calibrating electronic temperature sensors
- Programming digital displays

Features

* Experimental introduction to temperature

measurement: methods, areas of application,

characteristics₁
* Clearly laid out unit primarily for laboratory

experiments, also suitable for demonstration

purposes

Alternative products

FL 090 -- Strain Gauge Demonstration Unit
HL 104 -- Temperature Measurement Training Panel
IA 110 -- Calibrating a Pressure Sensor
IA 120 -- Principles of Industrial Sensors
WL 920 -- Advanced Temperature Measurement Unit

Specification

[1] Experiments in the fundamentals of temperature measurement with 7 typical measuring devices
[2] Various heat sources or storage units: laboratory heater, immersion heater, vacuum flask
[3] Calibration units: precision resistors and digital multimeter, +/-200mV
[4] Mercury, bimetallic and gas pressure thermometers
[5] Temperature sensors: PT100, thermocouple type K, thermistor (NTC)
[6] Various temperature measuring strips
[7] Psychrometer for humidity measurement
[8] Plastic casing for sensors, cables, measuring strips and immersion heater
[9] 230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 phase

Technical Data

Immersion heater
- power output: 500W
- adjustment of power feed via power-regulated

socket
Laboratory heater with thermostat
- power output: 450W
- max. temperature: 450°C
Vacuum flask: 1L
Measuring ranges
- resistance temperature detector PT100: 0...100°C
- thermocouple type K: 0...1000°C
- thermistor (NTC): 20...55°C
- mercury thermometer: -10...300°C
- bimetallic, gas pressure thermometer: 0...200°C
- temperature measuring strips: 29...290°C
Precision resistors: 10Ω, 100Ω, 1000Ω
Psychrometer: thermometer: 0...60°C

Dimensions and Weight

l x w x h : 800 x 500 x 650 mm
Weight : approx. 40 kg

Connections

230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 phase

Scope of Delivery

1 unit, complete
1 case
1 set of cables
1 laboratory heater
1 immersion heater
1 vacuum flask
1 digital multimeter
1 set of instructional material

Order Details

060.20200 WL 202 Fundamentals of

Temperature Measurement