K204 - Thermometer VOLTCRAFT - Free user manual and instructions

USER MANUAL K204 VOLTCRAFT

This operating manual belongs to this product. It contains important information on the commissioning and handling of the product. Please bear this in mind, even if you pass it on to other people. Please keep this operating manual for future reference! A list of the contents can be found on page 23 in the table of contents, indicating the number of the relevant pages.

Introduction Dear Customer, With the Digital Thermometer 304 you have purchased a state-of- the-art temperature measuring device. The design corresponds to DIN VDE 0411, Part 1 for measuring devices = EN 61010-1. Moreover it is EMC-tested (for the interi- or domain) thus fulfilling the requirements of the established European and national guidelines. The conformity has been proven and the relevant documents are in the possession of the manufacturer. To preserve this condition and to ensure safe operation, the user has to observe this operating manual! In case of technical questions please contact us: Germany: Tel. [phone], Fax [phone] E-mail: Please use our contact form in the Internet: www.conrad.de in the category "Contact" Mon to Thurs 8.00am to 4.30pm Fri 8.00am to 2.00pm 20Prescribed Use Measurements of temperatures within the range of -200°C to +1370°C and –328°F to +2498°F resp. by means of one or two up to four (independent) external temperature sensor(s) (K-type). Measurements of temperatures within the range of –50°C to a maxi- mum of +200°C and –58°F to +392°F resp. by means of the two enclosed K-type temperature sensors. Signal transmission bi-directionally to an IBM-compatible PC with Windows ’98 or higher via the serial interface. A measurement under unfavourable ambient conditions is not admis- sible. Unfavourable ambient conditions are: - wetness or too high air humidity, - dust and inflammable gases, fumes or solvents, - thunderstorms or thunderstorm-like conditions as strong elec- trostatic fields etc. A use different to the one described above damages the measuring instrument. Moreover, this involves dangers, such as e.g. short-cir- cuit, burning, electric shock etc. No part of the product may be modified or rebuilt! The safety instructions must be strictly observed! 21Controls Illustration (fold-out page)

2. Measuring input "+" and "–", channel T2, for one K–type tem-

3. Measuring input "+" and "–", channel T3, for one K–type tem-

4. Measuring input "+" and "–", channel T4, for one K–type tem-

functions and measuring units

6. On/Off push-button, in secondary function to switch on and off

the background lighting

7. Push-button "HOLD" for keeping a measuring value (with

rapidly changing measuring signals)

8. Push-button "REL" (for relative value measurement = reference

9. Supply jack for connecting a suitable 9V DC adapter "–" inside

10. Switch for changing the measuring unit from "°C" to "°F" and

12. "MAX MIN" – push-button for recording the maximum and

minimum measuring values

13. Push-button "T1 – T2" for displaying the temperature difference

of channel 1 minus channel 2

14. Threaded tripod bush

15. Cover for the subjacent battery compartment

• 22Table of Contents Introduction p. 20
• Prescribed Use p. 21
• Controls (fold-out page) p. 22
• Table of Contents p. 23
• Safety Instructions p. 23
• Presentation p. 25
• Handling, Putting-into-Operation p. 26
• Carrying out Measurements p. 31
• Disposal p. 32
• Correcting Malfunctions p. 32
• Maintenance and Calibration p. 33
• Technical Data and Measuring Tolerances Safety Instructions The guarantees become invalid in the event of damage resulting from non-observation of the operating manual! We do not accept responsibility for such damage. Moreover, we accept no responsibility for property damage or per- sonal injuries caused by improper use or non-observance of safety instructions. Furthermore, in all such cases guarantees become invalid. - To ensure safe operation the user has to observe the safety instructions and warning notes ("Warning!" und "Note!") contai- ned in this operating manual. The following symbols are to be observed: 23= Read the operating manual - Measuring devices and accessories are no toys and must be kept out of reach of children in all circumstances! - In industrial facilities, the safety regulations laid down by the pro- fessional trade association for electrical equipment and facilities must be adhered to. - In schools, training facilities, do-it-yourself and hobby works- hops, measuring devices and accessories are to be used only under supervision of trained personnel. - When handling the thermometer take care that the measuring media are imperatively voltage less! Use special care when hand- ling voltages over 25V AC and over 35V DC respectively. Even with these voltages you may suffer a life-threatening electric shock when touching electrical conductors. - Before each measurement check your measuring device and the temperature sensors for damage(s). - The voltage between measuring device and earth must by no means exceed 24V ACrms. and 60V DC resp. - Do not work with the measuring device in rooms or under unfa- vourable ambient conditions where inflammable gases, fumes or dust are present or may be present. For your own safety prevent the measuring device and the measuring leads resp. from getting damp or wet by all means. Avoid operation in direct vicinity to a) strong magnetic fields (loudspeakers, magnets) b) electromagnetic fields (transformers, motors, coils, relays, contactors, electromagnets etc.) 24c) electrostatic fields (charges/discharges) d) transmitting antennas or high-frequency generators - Do not use the digital thermometer shortly before, during or shortly after a thunderstorm (lightning stroke!/high-energy excess voltages!). Make sure that your hands, shoes, clothes, the gro- und, the measuring device and the measuring leads resp., the cir- cuits and the circuit elements etc. are dry by all means. - If there is reason to believe that safe operation has become impossible, the device must be put out of operation and secured against unintended operation. It can be assumed that safe opera- tion is no longer possible, if - the device shows visible damages - the device no longer works and - it was stored under unfavourable conditions for a long period of time or - after extraordinary stress caused by transport. - Never turn on the device immediately after it has been brought from a cold into a warm room. Condensation water that forms might destroy your device. Leave the device switched off and wait until it has reached room temperature. Presentation This Digital Thermometer 304 with PC-connection is equipped with several special features suitably supplementing the range of measu- rements: With the"MAX MIN" function e.g. it is possible to establish and keep the respective highest or smallest occurring measuring value. With the function "HOLD" you can keep - rapidly - changing measuring 25values (for the measuring protocol). With the bush button "T1 – T2" the difference from channel 1 – (minus) channel 2 is displayed. With the bush button "°C/°F" you may choose between two measuring units: the "English" in degree Fahrenheit and the one of the "remai- ning European" countries in degree Celsius. If you finally operate the push-button REL (with triangle symbol) the actual temperature dis- play is set to "0.0" and only the difference (delta) is displayed. And with the switch-on push-button the background lighting can be switched on and off. The measuring range extends from –200°C to +1370°C or from –328°F to +2498°F. The temperature range of the enclosed sensors however is limited to –50°C to +200°C (-58°F to +392°F). The Digital 4-Channel Thermometer 304 is universally applicable in do-it-yourself and hobby workshops as well as in the professional area and in schools. Handling, Putting-into-Operation A Inserting of battery – exchanging of battery In order to work properly your measuring device has to be equipped with a 9 V compound battery. When the battery exchange symbol appears in the left centre on the display you have to carry out a bat- tery exchange. You do this in the following way: - Disconnect your measuring device from the measuring circuit (and from the PC if connected or if any), - remove the temperature sensors from the measuring device, - switch it off and - push the battery compartment cover carefully open in the direction of the arrow. - Separate the used battery from the connecting clip and - replace the battery by a fresh one of the same type. p. 34

26- After changing the battery, put the connected battery into the

battery compartment and - close it again carefully. - When closing the battery compartment make sure that the line of the connecting clip (read/black) is not squeezed. Warning! Never operate the measuring device when open! Do not leave used batteries in the measuring device since even leakage-protected batteries may corrode and chemicals may be released hereby that are detrimental to your health or dest- roy the battery compartment. Used batteries are to be considered as special waste and there- fore have to be disposed of environmentally compatible. To this aim special collecting boxes are provided at your specialized dealer’s shop or in the reusable waste facilities. B Connecting the sensors Whenever carrying out a measurement only use the temperature sensor specified for the purpose (in this case the K-type). Before making any connection check the state of the connector and the sensor end ("pearl”) resp. and make sure that the insulation is intact. Warning! Always make sure that only the temperature sensor is exposed to the temperatures to be measured. Urgently bear in mind the safety instructions and the technical data concerning the wor- king temperature. Never exceed the maximum input quantities. C Putting-into-operation C1 Basic Setting With the coloured push-button "I" the measuring device is switched on and off. The device can equally be switched off by means of the 27Auto-Power-Off function. Auto-Power-Off means an automatic switching-off of the device to the so-called "Sleep-Mode" (stand- by). The device switches off after approximately 30 minutes if no push-buttons are operated or the Auto-Power-Off function has not been deactivated before. The Auto-Power-Off function can be deactivated by way of opera- ting the push-button "HOLD” at the same time when switching on the thermometer. An acoustic signal (twice in succession) indicates that the automatic switch-off has been deactivated. If you want to switch off the measuring device before 30 minutes have elapsed you have to operate (keep pushed down) the push- button for 3 seconds. The display will show you a so-called "Count Down”: "P -0FF - - - 3.....2.....1" In secondary function the push-button serves to switch on/off the background lighting when lighting conditions are unfavourable. Sin- ce the lighting however has a relatively high energy consumption you should not use it too often. Note! The background lighting is switched off automatically after approximately 26 seconds. C2 Push-Button Assignment a) MAX MIN By operating the push-button "MAX MIN" you switch over to the maximum and minimum value display. The occurring maximum and minimum temperatures of all inputs are constantly established and memorized. The push-button "MAX MIN" being operated in individual steps the maximum value "MAX", the minimum value "MIN" or the actual 28measuring value "MAX MIN" (flashing) are readable in turn. To leave the function operate the push-button "MAX MIN" for about 2 seconds. Note! During maximum/minimum/average value recording the mea- suring unit cannot be changed. Equally the function "REL" can- not be activated. b) Push-button "T1 – T2" With this push-button you determine which display is visible: the display of temperature T1 to T4 or the display of temperatures T1 and T2 (one beneath the other) or to the right of it the difference from T1 – (minus) T2. c) HOLD function Whenever pushing this button (briefly) you switch the HOLD func- tion on or off. HOLD means that the actual measuring value is kept until the data-hold function is deactivated again. Switching over from °C to °F or vice versa is not possible. Nor are the activation of the time display or the "MAX MIN” function or the measurement of the reference value "REL”. d) Measuring of Reference Value "REL" With the push-button REL the reference-value measurement is star- ted. To this aim the actual temperature display (T1 to T4) is set to "0.0" independent of the measuring unit (°C or °F). Afterwards only the difference values are displayed. If afterwards the measured tem- perature at channel T1 is less e.g. by 5 degrees Celsius (°C), "–5°C" is displayed. If, however, afterwards the measured temperature at channel T1 is more by 25 degrees Fahrenheit, "25°F" is displayed. To return to the actual temperature display you have only to opera- te the push-button "REL" once more. 29Note! Whenever you push the button an integrated beeper will give you acoustic feedback in form of a short "beep”. e) Push-Button °C/°F With the push-button ”°C/°F” you change the measuring unit from degrees Celsius "°C" to degrees Fahrenheit "°F" and vice versa. This setting is not kept when the digital thermometer is switched off. C3 Jack Assignment a) Measuring Inputs The measuring jacks T1, T2, T3 and T4 are so-called unipolar (+ and –) blade contact jacks. You have to connect the K-type temperature sensors to these jacks if you want to carry out temperature measu- rements according to the sensor specifications. Please note that the blade contacts of the connecting plugs are different in breadth. Warning! Never try to force the connecting plugs into the jacks when confused (+ and –)! The jacks would be irretrievably destroyed and would have to be replaced. b) Serial RS–232 Interface The ”OUTPUT" jack is a serial RS-232 interface in 3.5mm stereo jack format. The assignment is established as follows (connector plan): At the back of the connector there is the ground = GND = reference mass (=reference potential) In the middle of the connector there is contact RX = 5V High Input (= data input) In front at the tip there is contact TX = 5V High Output (= data output) 30In order to make communication possible between the thermometer and an IBM-compatible PC, at first the prerequisite conditions have to be established: A connection between PC and thermometer and the installation of the software. Note! The interface circuit as well as the software are optionally avai- lable as packages. c) Connecting an Adapter And finally jack 9V DC. Here an adapter with the following output data can be connected: 9V DC voltage, if possible stabilised, with an output current of at least 100mA, an external connector diameter of 1.35mm and an internal connector diameter of 1.35mm. The polarity: minus "-" inside, plus "+” outside. D Working Position Always operate the Digital 4-Channel Thermometer 304 in a position that you can read the LCD display or that the digital display points to the top resp. Via the tripod thread in the bottom part of the housing the measu- ring device can be fixed to a tripod. Carrying Out Measurements The temperature measuring range of the digital thermometer extends from – 200°C to +1370°C for K-type sensors. The tempera- ture range of the enclosed K-type sensors extends from – 50°C to a maximum! of +200°C. Do not measure temperatures above +200°C (= 392°F) with the sensors enclosed. 31Please bear in mind that "outside” the temperature range +18°C to +28°C (= range of guaranteed measuring accuracy) only the thermo element may be exposed to the temperature to be measured. To carry out a measurement you proceed as follows:

1. Connect according to your ideas either one or two or three or four

temperature sensors (two enclosed) to the thermometer and switch it on. Warning! Do not apply any voltages. This may destroy the device.

2. Hold the temperature sensor/sensors (line end/ends) at/into the

voltageless measuring medium/media (dissipators and so on, but never corrosive or inflammable liquids!). Note! If the temperature sensors are not (correctly) connected or interrupted, "- - - -" is displayed instead of a measuring value. Disposal If the Digital Thermometer 304 despite intact supply (9 V compound battery) is not ready for use or beyond repair it has to be disposed of in accordance with the relevant legal rules. Correcting Malfunctions With the Digital 4-Channel Thermometer 304 you have purchased a state-of-the-art product. Nevertheless problems or malfunctions may arise. Therefore you find in the following a description of how 32you can correct some of these malfunctions yourself with relative ease; please observe the safety instructions in any case! Malfunction Possible Cause No display with the Has the battery been used up? device switched on Has the measuring device automatically switched off after having been idle for 30 minutes? Maintenance and Calibration To ensure the accuracy of the thermometer over a longer period of time it should be calibrated yearly. The battery exchange is described under "Handling, Putting-into- Operation A”. To clean the device or the display window please use a clean, non-linting, antistatic, dry cloth. Warning! Do not use carbon-containing cleaning agents, benzines, alco- hols or the like as these attack the surface of the device. Furt- hermore, the fumes are detrimental to your health and explosi- ve. Do not use sharp tools, screwdrivers, metal brushes, etc. for cleaning. 33Technical Data and Measuring Tolerances Technical Data Display . . . . . . . . . . . . . . . . . : 4-digit display up to 9999, with a 4- digit subdisplay, symbol display and measuring units Maximum measuring rate . . . : 2.5 measurements per second, i.e. 5 measurements in 2 seconds Working temperature (ambient temperature). . . . . . : 0°C to +50°C (32°F to 122°F) Storage temperature. . . . . . . : -10°C to +60°C (14°F to 140°F, bat- tery removed) Relative air humidity . . . . . . . : 0 to 80 %, non-condensing Temperature for guaranteed accuracy . . . . . . : +23°C ±5 K Temperature coefficient . . . . : additionally 0.01% of reading +0.03°C (resp. 0.01% of reading +0.06°F) per K in the range of 0°C to 18°C and from 28°C to 50°C Battery exchange display . . . : " " less than approx. 7.3V bat- tery voltage Battery type . . . . . . . . . . . . . : NEDA 1604 9V or 6F22 9V (alkaline) Weight. . . . . . . . . . . . . . . . . . : 210g (with battery) Dimensions (l X b X h). . . . . . : 184 x 64 x 30mm (without wires) Measuring tolerances Indication of accuracy in ± (% of reading + display error in Kelvin "K") "K" for Kelvin stands as absolute value of a temperature diffe- rence or deviation. Accuracy for the period of one year at a temperature of +23°C ±5K, at a relative air humidity of less than 80 %, non-condensing. The warm-up time is 1 minute.

34Measuring range Accuracy Resolution K-type measuring device -200°C to +199.9°C ±(0.2%+1.0K) 0.1°C +200°C to +399°C ±(0.5%+1.0K) 1°C +400°C to +1370°C ±(0.2%+1.0K) 1°C -328°F to -200°F ±(0.5%+2.0K) 1°F -199.9°F to +199.9°F ±(0.2%+2.0K) 0.1°F +200°F to+2498°F ±(0.3%+2.0K) 1°F K-type temperature sensor TP-K01 -50°C to +200°C ±2.2K or ±0.75% -58°F to 392°F ±3.6K or ±0.75% Warning! Under unfavourable conditions exceeding the maximum admis- sible input quantities leads to damages to the measuring device or a threat to the life of the user!