Tempmaster PRO User Manual
Contents
1. and press NEXT to highlight the existing value press NEXT repeatedly to obtain the desired value Then press ENTER to store the specified value Press ESCAPE and then NEXT repeat the procedure for the span value 20 Tempmaster PRO Thermometer 6 Instrument Re Calibration It is recommended that this procedure is carried out by Labfacility or by an accredited laboratory facility Enter Cal Calibration must only be performed by an authorised person and in the laboratory with a steady ambient temperature access to the calibration level of the software is via a 5 digit engineer code this must be entered at the prompt by pressing INC DEC sequentially for the first digit Then press UNITS to move to the next digit Password Use SENSOR and CHAH ta select Digit Re calibration of the Tempmaster PRO is unlikely to be required routinely since its design provides very good short and long term stability Item required for calibration i A highly accurate resistance source providing 100 0000 and 250 0000 No lead resistance ii Suitable connectors for the rear panel sockets as appropriate CAUTION Do not proceed unless all specified items are available Failure to do so may invalidate the warranty 21 Tempmaster PRO Thermometer Connect 100 Ohm resistance to the PRT A input port The instrument displays the value of the 100 Ohm input according to its previous calibra2. at low temperature then 30 minutes minimum 0 5mA 0 01 Sampling rate selectable between 4 and 64 measurements averaged per reading C F K O A B or A B Up to 10 calibration values can be allocated to Pt 00 input A amp B and to thermocouples input A amp B Values are retained in non volatile memory until replaced by user ITS 90 or IPTS 68 coefficients can be used for custom calibration Correction values stored in connector Corrects differential temperature readout between two sensors to zero 50 each lead maximum 8000 readings Internal Lithium lon rechargeable batteries Mains 90 260V 50 60Hz universal adaptor included Battery charge life up to 12 hours with full charge 23 Tempmaster PRO Thermometer Series Mode Rejection Common Mode Rejection Display Front Panel Controls Mechanical Case Dimensions Weight Input Connections USB Serial Communications PC Software standard Analogue Output standard Application Note 60dB 50Hz 50mV RMS applied 30V RMS applied between input and earth produces no measurable effect 128 x 64 pixel character OLED screen with diffused backlighting Wide viewing angle high contrast adjustable 9 membrane push keys to control all instrument functions Metal bench top case adjustable tilt Overall I90mm W x 70mm H x 250mm D 3 0kg approx 2 x Pt100 via D type connectors Isolated 9600 Baud 8 data no parity stop bit Remote contr
3. not be required since communications may be established automatically If not simply click on the appropriate port Tempmaster PRO Thermometer 4e Input Channel Select A or B from the INPUT box in the top centre of the control panel the measured value is displayed below in the MEASURED VALUE box when MEASURE NOWY button is clicked Main Tables Coefficienis Probe Log Memory Settings About Channel A ad Channel 8 Sensor B 21 Sensor Pt100 z Measured Value Pt100 z 19 89 Unis Coefficients Corrections B lt Resolution OFF Measure Rr Jua eo psu orice 9 nx 4f Units and Resolution These are selected via the appropriate boxes in the Control Panel 4g Coefficients and Corrections These are selected as required for each channel their values having been set or default settings via screens obtained by selecting tables coefficients and or Tables Matching to calibrated sensors Tables Tab i Select the desired input A or B the MAIN window appropriate to the chosen calibrated probe ii Click on the TABLES Tab Main Tables Coefficients Probe Log Memoy Settings About A Values 100 012 0 000 Bue 107 891 20 010 a 119 520 50 200 188 996 101 008 157441 150 00 177 834 201 500 193 588 248 774 215 785 305 550 Onne Enor 2 Tempmast
4. 80 milliOhms lead resistance e g metre of 7 stranded 0 2mmQ wire to recognise a 4 wire probe Otherwise the instrument will default perhaps correctly to 3 wire mode If simulating a sensor input or calibrating the instrument ensure 80mQ lead resistance between the resistance source and D plug e g metre of 7 x 0 2mm Copper Cable 3j Variable Filter Rate In high resolution mode Pt100 inputs only the sampling rate can be varied between 4 and 64 i e the number of measurements averaged per display update The selection is made via the edit filter menu obtained as follows Main Menu Filter Press MENU then NEXT The edit filter menu is obtained The Display indicates SELECT FILTER LENGTH 0 1 SECONDS EACH VALUE Using the Up Down keys enter the required value Press ENTER and the resultant value will be stored until changed by the user Press ESCAPE to return to the main display Tempmaster PRO Thermometer Operation with a PC 4a Install the Software For use with a PC the software supplied with the Tempmaster PRO must be installed on the PC and communication established on line green indicator showing via the USB lead supplied System requirements for installing the software Windows XP with at least one USB port All Windows operating systems prior to XP do not support USB natively and are not recommended 4b Control Panel In the PRO Software window double click on the PRO C
5. applied the null function corrects the differential temperature readout between two sensors to zero For example the apparent temperature difference between two sensors known to be at the same actual temperature can be corrected to zero prior to for example heat exchanger experiments Both inputs can be scanned and values logged according to parameters set up by the user in the PC software the instrument incorporates a real time clock and on board memory The adjustable contrast OLED display screen provides data readout user prompts and mode annunciation This very important feature ensures a high degree of user friendliness and confidence User prompts indicate which buttons to press in the appropriate sequence when selecting parameters and functions and when setting calibration values Mode annunciation indicates which mode of operation is currently selected A flash drive USB port is provided to allow data to be stored and or exported Firmware update are also facilitated via this port PC software running in WINDOWS is provided as standard it allows programming of custom calibration remote control amp measure and logging functions Tempmaster PRO Thermometer 2 Installation The instrument is for bench top and portable use folding legs can be extended to provide a convenient viewing angle All connections are made to the rear panel as indicated Analogue output Pt100 input Pt100 input Supply Flash USB Channel
6. status CORRECT OFF OR CORRECTED There are eight annunciations to indicate the status of corrections when taking readings with the Tempmaster PRO Display screen annunciation Status l OFF 2 i e when units are mV or Ohms 3 OUTSIDE Tables either Local or Probe are selected but the current electrical measurement is beyond the electrical range defined in tables 4 No Pts Tables selected but no table found 5 Local T Local tables i e in the instrument are applied 6 Local C Local coefficients i e in the instrument are applied 7 ProbeT Probe tables i e in the Probe are applied 8 Probe C Probe coefficients i e in the Probe are applied Using Tempmaster PRO to obtain a secondary Calibration There are two ways in which a non calibrated sensor can be converted into a secondary standard using a sensor matched Tempmaster PRO By means of CHANNEL A B measurement Connect the certified sensor to Channel A and the un calibrated sensor to Channel B The sensors can be of similar or dissimilar type e g Pt 00 certified sensor on Channel A and type thermocouple on T C B NOTE A B display values at various stable isothermal calibration temperatures and compute sensor B corrected values accordingly Connect the certified sensor to Channel A and the un calibrated sensor to Channel B Compare direct and B readings in turn at various stable isothermal calibration temperatures and compute sensor B corre
7. 0 0 Q 0 51 80 51 80 51 81 51 80 51 81 51 81 51 81 51 81 Sue 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 82 51 81 51 81 51 81 51 80 51 81 51 81 51 81 51 80 51 81 51 80 51 81 51 81 51 81 51 8051 81 51 81 Print 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 Read 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 82 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 81 51 82 51 81 51 81 51 81 51 82 51 81 51 81 51 82 51 81 51 81 51 81 51 81 51 81 51 81 51 82 5181 51 82 51 81 51 81 5181 51 81 51 82 5182 51 81 51 81 51 82 51 82 51 82 51 81 51 82 51 81 51 81 51 82 51 82 51 82 51 82 51 8251 82 51 81 51 82 Onie Ena 0 54 In this tab readings stored on board the instrument can be retrieved and saved to file normally in the same folder which contains the PC software i Click READ to read the values ii Click SAVE to save the readings to file iii Click PRINT to print the readings Analogue D to A re transmission output Main D gt A Setup In the main menu scroll down to D gt A Setup and press ENTER Follow the on screen prompts to set up zero and span degrees C values Press ENTER to Edit Zero value
8. A Channel B Connection Drive Communications 2a Supply Connection Refer to the rear panel illustration Primary power is provided by the internal Lithium lon battery which provides up to 12 hours of operation from a full charge The external 90 to 260V 50 60Hz power supply allows recharging and continuous operation The output lead with its fitted connector is plugged in to the rear panel socket DC in 5V IA Pressing the front panel POWER key switches the instrument on off The battery charge indicator in the top right of the display indicates the state of charge The battery will charge whenever the instrument is connected to the power adaptor Tempmaster PRO Thermometer 2b Communications Interface Connect the USB cable supplied between the instrument and the PC Refer to the rear panel illustration 2c Input Connection Sensors Refer to the rear panel illustration 00 sensors Platinum resistance thermometers must be fitted with a high quality D plug and connected to input PRT A and or PRT B as required A 3 or 4 wire configuration can be used but they are connected differently as shown The instrument will automatically sense which configuration is employed Special care must be taken when connecting 3 wire PtI00 terminations to the connector pins A good crimp must be achieved to avoid Ohmic contacts which would result in reading errors Only use good quality connectors with gold contact material the Labf
9. TEMPERATURE amp PROCESS TECHNOLOGY Tempmaster PRO High Precision Digital Thermometer Logger for Pt 100 Sensors User Manual C RoHS compliant 550 9001 BR Registered 015 Certificate No 4746 www labfacility co uk Tempmaster PRO Thermometer Contents 1 About the Tempmaster 3 2 Installation ios eere Rer bh Ee rex ee UHR e 5 a Supply Connection siils ees ak e ek RR ERR ERRARE Rd 5 b Communication Interface espe E EE LP EPOR RUE n Ea erdt 5 c Sensor CONNECHOM e gate wien eade ee exeun adea cus 6 3 Stand Alone Operation 0 0 cece ec eee 7 a To read sensor temperature 9 b To read differential temperature 9 c Matching Tempmaster PRO to calibrated 10 d SMART probe operation ssis usui te eR ER eat acte gp ane o ER PDT E e Temperature measurement with calibrated E f Using Tempmaster PRO to obtain a secondary sensor calibration 12 g On board logging i5 bici id ea iran 13 li Error ndications ett ER Ru ed 13 i or 4 wire recognition PtI00 cece cece eee cee eee eee 14 je Variable filter recreo pere E Sct ERR CURE deeds 14 4 Op
10. acility D type is recommended Application note Inputs are not isolated in the Tempmaster PRO which is primarily designed for laboratory applications and site calibration of industrial temperature sensors Probes connected to the instrument must therefore be isolated from high voltage pick up The instrument should be disconnected from the mains adaptor and operated from its internal batteries in such conditions Tempmaster PRO Thermometer 3 Operation LABFACILITY Tempmaster PRO Ensure that the instrument is connected to a suitable supply and that the required connections are made Switch on using the POWER key The display will show the programme firmware designation followed by a short delay while the internal checks are carried out The instrument will then commence normal operation according to the selected mode prior to switch off e g if channel B PRT was in use when switched off this will be the mode when switched on OPERATION requires the selection of appropriate menus which are shown on the display screen Menu screens are obtained as shown in the following sections although the procedure is described in the text in each case Display brightness can be adjusted as required in the SETTINGS sub menu described later Tempmaster PRO Thermometer Main Menu Correct Main Menu Enter Main Menu Enter Settings Main Menu Enter Brightness 4 ENTER to edit Main Menu En
11. cted values accordingly On this basis a range of values can be obtained for use in correct B matching procedure as section 3iii Tempmaster PRO Thermometer 3g On Board Logging View Log 1 Select LOGGING in the MENU Press ENTER to view write start erase log Select the required memory slot 1 to 15 and enter the logging parameters Follow the on screen prompts Press ESCAPE to exit the logging menu 3h Error indications The Tempmaster PRO has several modes of error indication according to internal or external problems as follows DISPLAY CAUSE BROKEN PROBE Open circuit sensor or sensor not connected to input OUT OF RANGE Thermocouple ranges only input mV value outside calibration range below min Value or above full span value ILLEGAL A B MODE A B mode will only operate with C F or Kelvin units CAL LOST All calibration values corrupted or lost Perform re calibration or RETURN TO FACTORY CPU ERROR Failure of the two microprocessors to communicate RETURN TO FACTORY BATTERY FLAT Inadequate battery charge to sustain operation PLEASE RE CHARGE within specification Note During normal operation if selected probe is disconnected from the instrument the display will indicate BROKEN PROBE If the same probe is re connected normal operation will be resumed Tempmaster PRO Thermometer Ji 3 or 4Wire Recognition PtlI00 The Tempmaster PRO requires a minimum of
12. er PRO Thermometer iii Enter up to ten values of engineering units with 3 decimal places e g 100 100Ohms amp 0 000 C corresponding to the temperature as stated on the calibration certificate for the reference probe and click SEND this sends to table of values to the instrument Existing values will be overwritten iv Stored correction values can be switched ON or OFF as required in the Main window v Clicking READ displays stored values may be rounded up or down vi Clicking CLEAR clears values entered in the table on the window not from the instrument vii Click LOAD to load a corrections table from file viii Click SAVE to save the corrections table to file ix Click PRINT to print the corrections table 4h Custom Coefficients These can be used to effectively modify the transfer characteristic of a sensor if required The default coefficients are those for ITS 90 IPTS 68 was required for example the appropriate values could be entered i The required channel A or B as appropriate to the sensor in question must be selected in the MAIN window ii Click on the COEFFICIENTS tab A Load Save Print A 3 907781 E 03 Send B 5 865715 07 Read e 2 472648E 12 mo 9991611 Online 9 Enor 0 iii Enter the required values for A B C and Rto as appropriate and click SEND to send these values to the instrument existing values will be overwritte
13. eration with a sin ese e gx orem ERE RR wee 15 a Install thie software cose Ir eb ebbe beard ern 15 b Control Panel ku d oen n Pee 15 G Sensor selection RACER RO l6 d Settings p POUR RR RR ER IRR EE Ue gai ede l6 Input channel nr RR RR RR pe 6 17 f Units and resolution ess p 2c06o4ct055 CER es donee Sian oe UR REIR 17 5 Coefficients and corrections 17 h Custom coefficients be bree ea Rd 18 i SMART probe i doa hti e e eh ea he Cp a a RR Rene ee ER 19 REF CLE 19 MT Tm 20 5 Analogue D to A output 0 eee een 20 6 Instrument Re Calibration 0 0 esee 21 7 Specifications a Ree Ra a aper tree RI Re 4 ace 23 Information in this publication may be subject to change the Tempmaster PRO is a micro processor based software driven instrument and may therefore be subject to software and hardware changes in line with our policy of continuous product development Tempmaster PRO Thermometer l About the Tempmaster PRO The Tempmaster PRO is a successor to the very successful Tempmaster 00 thermometer developed over a 25 year period Like its predecessor the Tempmaster PRO provides laboratory standard temperature measurement with Pt100 sensors and greater versatility to ex
14. lues are entered into the Tempmaster PRO with their relevant temperature points using the front panel keypad the software The instrument then digitally self calibrates to the associated probe over the range embraced in the calibrated values used the temperature readout is corrected accordingly Additional manual procedures are not required to compute precise temperature readings since these are displayed directly miscalculation errors are thus eliminated Very high system accuracies better than 40 milliKelvins can be achieved using probe matching Corrections which are programmed in can be displayed for confirmation However initial input adjustment enabling and disabling of corrections are protected For by a special key sequence to prevent accidental or unauthorised changes Values can be changed by an authorised user at any time Tempmaster PRO Thermometer For the 00 inputs SMART probes can be used which incorporate dedicated correction values within the connector of each probe When a SMART probe is connected to input A or B or both inputs the corrections are automatically applied without the need for user intervention A common application for the Tempmaster PRO is the comparison calibration of working sensors against a calibrated reference standard or semi standard sensor For example the sensor under test in channel B is compared against the reference sensor with programmed corrections in channel A When
15. n iv Click READ to see stored values at any time v Click LOAD to load a set of coefficients from file vi Click SAVE to save file vii Click PRINT to print the coefficients Tempmaster PRO Thermometer 4i SMART Probe 9 Serial No 0 000000 oi Save A 0 0 Print B 0 0 Send 00 Ode 9 EnB Led Click on the Probe tab to view the SMART probe window This window is very similar to the one in the Tables tab and the values stored in the probe can be read entered or edited The probe Serial No is shown and can be modified to suit Click SAVE to save the values to the probe as required 4j Log Interval ins 10 S j Online 9 Enor 0 om This tab is used to control PC logging of measured values i e readings are saved to file on the PC and not on board the instrument Readings are saved in the same folder as that in which the PRO software resides The selected channel as configured in the Main tab is indicated and the selected sensor type Measured value and units are also displayed In the Logging to PC panel the logging interval is selected 1 3600 seconds Logging commences when START is clicked and stopped when STOP is clicked Tempmaster PRO Thermometer 4k Memory Tables Coefficients Probe Log Memory Settings About Inboard Memory Slot Sic2cscacscercrececescwmcnecreycucis 20 19 2 3010 10 0 4903 0 0 0
16. n Menu 0 Correct The display screen shows WIEW CORRECTIONS or VIEW CORRECTIONS FOR THERMOCOUPLES FOR 100 SENSORS 3e Tempmaster PRO Thermometer 3d SMART probe operation Smart Probell View Smart Probe Data In the main menu scroll down to SETTINGS and press ENTER The smart probe screen is shown Press ENTER to view the Smart Probe data table of values The probe tag and values are displayed when an appropriate probe is connected to the instrument smPR BE A S No 1284 Deg C Ohms 2 111 182 111 Point Humber EH For custom coefficients In the correction menu scroll down to COEFF screens and follow the prompts to view values and to specify relevant channel ie A B Both off Press ENTER to select Coeff Chani Select Coefficient Prise correction Mode Set ta Temperature Measurement with Calibrated Sensor To use the Tempmaster PRO with its associated calibrated sensor ensure that The appropriate sensor s is are connected to the relevant input s A or B 2 Select the relevant channel to suit ensure that the correct sensor type is selected 3 Then obtain correct menu press MENU the correct menu is obtained Scroll through options as required Main Menu I Correct CORRECT OFF CORRECT A CORRECT B CORRECT A B Tempmaster PRO Thermometer 3f Press ENTER to select Press ESCAPE to return to the main display which will confirm the corrections
17. now displayed is the difference value between sensors A and B as selected i e A B For calorimetry and certain other applications to optimise the precision of such differential measurements the probe tolerances can be nulled as follows Nulling procedure requires the relevant probes A and B to be tagged for repeatability Ensure that both sensors are held at the same temperature say 0 C or other value and measure A B It is possible to null out differences between the two sensors measured differentially as follows Tempmaster PRO Thermometer Obtain the NULL menu A B Null by scrolling through the sub menus until the menu appears Press ENTER The display screen shows USE NULL ON OFF amp VALUE i Acquiring a new null ii Applying a measured null value The last null value will be applied such that the display value used is A B Null value The display screen shows ACQUIRE NEW A B NULL VALUE DEG C VALUE 3c Matching Tempmaster PRO to calibrated sensors It is possible to automatically match the Tempmaster PRO to 00 sensors with dedicated calibration values via the PC software see p17 Such values published in associated certificate indicate true O C and value corresponding to accurately known reference temperatures Viewing corrections via the keypad l Obtain the required thermocouple or Pt100 PRT CORRECTIONS menu press MENU and then CORRECT Press ENTER Mai
18. ol and measure Supplied as standard on CD ROM Remote control and measure Log readings to file Download to PC Programming corrections User programmable 0 to 5V Inputs are not isolated in the instrument which is primarily designed for laboratory applications and site calibration of industrial temperature sensors Probes connected to the instrument must therefore be isolated from high voltage pick up 24 Tempmaster PRO Thermometer Assessories and Order Codes Tempmaster PRO is supplied complete with switch mode power supply 90 260V 50 60Hz two Pt100 D connectors operating manual and PC software Precision PtI 00 Probes Stainless steel probes 6mm diameter with 2m screened PTFE lead Pt 00 Probes and connector LP L250 250mm long maximum 250 C LP H450 350mm long maximum 450 C UKAS Calibration LP UKAS UKAS calibration for instrument alone LP SYS CAL UKAS calibration of instrument and sensor together at five points LP COR CAL UKAS calibration of instrument and sensor together at five points after initial calibration of sensor only and programming of corrections Accessories LP TBLK3 Terminal Block for connection of 3 wire Pt 00s LP TBLK4 Terminal Block for connection of 4 wire Pt 00s 25 TEMPERATURE amp PROCESS TECHNOLOGY To receive our regular email newsletter please register your details on our website www labfacility co uk SOUTHERN UK amp EXPORT DIVISION Units 5 6 am
19. ontrol Panel icon The following window is opened v fol Panel 28 Ap 2010 Version 1 0 Tempn Main Tables Coefficients Probe Log Memory Settings About Channel A ad Channel B Sensor B ke Sensor Ptioo MeseuedVatie Coefficients B Resolution OFF Note When the control panel is opened subsequently the tab selected prior to closing will be applicable The on line indicator shows green when communications between the PRO instrument and the PC are established see settings on page 16 Local control of the instrument is not possible locked out when communications between instrument and PC are established and Remote selected remote control The front panel indicates REM To revert to local control of the instrument via the front panel click LOCAL remote control via the PC is disabled Tempmaster PRO Thermometer 4c Sensor Selection In the Main window the sensors currently selected for channel A and B are indicated in the relevant boxes Alternative sensor types for each channel can be selected by clicking the drop down arrow to the right of the indicated sensor and clicking on the desired type Note it is essential to ensure that the sensor type selected corresponds to the actual sensor type connected to the instrument 4d Settings Click on the SETTINGS tab for port selection if required In many cases this may
20. p 7 Block K Southern Cross Industrial Estate Shripney Road Bognor Regis West Sussex PO22 9SE Export Sales tel 44 0 1243 871287 fax 44 0 1243 871281 email exportsales labfacility co uk Southern UK Sales tel 44 0 1243 871280 fax 44 0 1243 871281 email southernsales labfacility co uk NORTHERN UK DIVISION Eden Place Unit 3b Outgang Lane Dinnington Sheffield S25 3QT Northern UK Sales tel 44 0 1909 569446 fax 44 0 1909 550632 email northernsales labfacility co uk ISO 9001 Registered UKAS QUALITY MAN d Certificate No 4746 Data ref 0501 10 OM A v1 2
21. tend the scope of applications Displayed values and user information are indicated on a bright clear OLED screen with diffused backlighting Data can be displayed in C FK OQ as required nine front panel push keys the only user controls are used in conjunction with the display screen It is this arrangement which makes for very simple and friendly operation Resolution is 0 01 C all computations are performed digitally without drift Overall stability is optimised by utilising only the highest quality components including high precision expensive metal film resistor networks There are two input ports for 3 or 4 wire 100 sensors the instrument automatically recognises 3 or 4 wire configurations The measured temperature can be displayed directly from one of the inputs or differentially between the two inputs Differential temperature and the two individual channel temperatures are displayed simultaneously Individual calibrated sensors can have their appropriate calibration values programmed into the Tempmaster PRO using either the keypad or the PC software supplied The PC software also allows corrections in the form of constants for individual Pt100 sensors to be programmed in The non volatile memory ensures that the values are retained until such time as they are changed even after switch off Where the calibration certificate relating to a particular probe states specific O values at stated temperatures up to ten such va
22. ter Next then D gt A Setup INC DEC to change ENTER to accept ENTER Use Null Main Menu Enter ENTERto Next Next ou 1 Null toggle en returns to main or off menu screen Tempmaster PRO Thermometer Ja To read sensor temperature directly Press SENSOR key to select the required type of sensor if different to that currently indicated Brief repeated key presses will step through the various types or holding the key depressed will auto repeat scroll through this applies to other functions as well NOTE If for any selected channel the sensor is either not connected including sensor open circuit the display will show BROKEN PROBE Press CHANNEL to select inputs A B or A B differential Press UNITS to display the desired units C E K or Q dependent on the type of sensor selected Press RESOLUTION to display the desired resolution either 0 01 or 0 001 for C K and only Only 0 01 resolution can be used with F 3b To read differential temperature The difference in temperature between two sensors can be obtained by displaying channel A B Ensure that the required sensors are connected to the appropriate A and B inputs Press CHANNEL to select A B after first setting up the individual channels A and B with sensor type and corrections ON OFF as required Press UNITS to display the desired temperature units which must be appropriate to both types of sensor The value
23. tion The instrument now measures the precise resistance and displays the value Press ENTER and the value is sampled and entered Press ESCAPE if calibration of the channel is not required a The display screen now shows CALIBRATION CH A PRT 100 OHMS Connect 250 Ohm resistance to the PRT A port The instrument now measures the precise resistance and displays the value Press ENTER and the value is sampled and entered b The display screen now shows CALIBRATION CH B PRT 100 OHMS Repeat the procedure as in c above but using the PRT B input port C The display screen now shows CALIBRATION CH B PRT 250 OHMS Repeat the procedure as in d above but using the PRT B input port 22 7 Specifications General Type Overall Accuracy Linearisation Conformity Stability vs ambient temperature Warm up 00 Sensor Current Resolution of data display Variable filter Measurement Units Measurement Modes Custom Calibration Smart Sensor Connection Null Function Sensor Lead Resistance Logging Supply Tempmaster PRO Thermometer Inputs Ranges Sensors Pt100 to IEC 751 ITS 90 refers 200 C to 850 C Ro 1000 3 or 4 wire connection with automatic recognition with manual override 0 01 C 0 000576 of span Better than 0 01 C Better than 0 0025 C per 1 C ambient change Negligible under normal ambient conditions Allow 5 10 minutes for full stability unless stored
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