BAT-10 - Physitemp
Contents
1. C to 199 9 C 0 4 C LO BAT Replace or recharge the batteries INPUT Probe input connector or lead may be faulty Differential 19 99 C to 19 99 C 0 01 C Replace probe at input selected 4 BATTERY REPLACEMENT non rechargeable units 1 TO MEASURE TEMPERATURE USE ONLY ALKALINE BATTERIES ineert plug of any type T thermocouple probe into input 1 or 2 Switch instrument OFF Unscrew two plastic caps from holders on Switch ON Select range Select probe input 1 or 2 Ensure DIFF back by turning counter clockwise Discard old batteries and ZERO button is not depressed Read temperature replace with fresh C cells Install all four batteries with positive 2 TO MEASURE DIFFERENTIAL TEMPERATURE terminals toward plastic screw caps Replace caps Connect probes to input 2 AND 3 Select DIFF range to measure 5 RECHARGING rechargeable units only differential temperature between these probes Select DIFF ZERO Plug AC charger 9V 250 mA into AC INPUT socket on back ADJUST Use screwdriver to set zero until display reads 0 00 of instrumement Allow 16 hours for complete recharging Release DIFF ZERO to read differential temperature of probe 2 With Ni Cad batteries installed the unit may be continuously with respect to probe 3 See manual for more detail instructions operated from AC recharger Note Input 3 is only activated in differential mode It is not possible to measure absolute temperature with this input Model BAT 10 Serial Number2. J 4 0 TEMPERATURE MEASUREMENT 4 1 Any type T thermocouple Copper Constantan can be used with the BAT 10 Thermocouple sensors made with special limits wire are accurate to 0 5 C in the range 0 50 C If better accuracy is required Physitemp s microprobes and clinical probes should be used These are manufactured with specially graded wire and are guaranteed accurate to 0 1 C in the range 0 50 C See Section 11 0 for more information on temperature measurement with thermocouples BAT 10 FRONT PANEL TEMPERATURE RANGE 5 POWER ON PROBE _ SELECT PROBE INPUTS BAT 10 REAR PANEL AUXILIARY OUTPUT CONNECTOR See page 5 BATTERY COMPARTMENTS AC INPUT SOCKET FOR BAT 10R RECHARGEABLE VERSION Section 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 OPERATING MANUAL BAT 10 Multipurpose Thermometer INTRODUCTION INITIAL INSTALLATION OPERATING INSTRUCTIONS TEMPERATURE MEASUREMENT DIFFERENTIAL MEASUREMENT TECHNIQUES AUXILIARY OUTPUT CONNECTOR ANALOG OUTPUT FOR CHART RECORDING BATTERY REPLACEMENT ALKALINE CELLS RECHARGING THE BATTERIES SPECIFICATIONS TEMPERATURE MEASUREMENT WITH THERMOCOUPLES WARRANTY AND SERVICE Appendix 1 Instructions for the use of the BAT 10 Differential Range with base temperature other than 40 00 C QX U CW shared Operating Manuals EB BAT 10 Rev 2
3. socket is present on all versions rechargeable and non rechargeable NEVER attempt to recharge or power a BAT 10 with non rechargeable batteries The batteries may explode or leak This is a fire hazard and can result in internal damage to the instrument BAT 10 can be field upgraded to BAT 10R with our RCK 10 recharger kit which includes Ni Cad batteries and wall mount charger When using BAT 10 for differential measurements not centered on the 40 C reference a correc tion must be introduced to accomodate changes in sensitivity and linearization at different refer ence temperatures In general differential measurements are quite correct when the difference reading is small and both sensors are in the 20 60 C range A correction is required when a differences greater than 1 C are to be measured b both sensors are not within 20 60 C c when measurements are not centered on the 40 C reference Calculation of true temperature can be made with reference to Appendix 1 Note Input the digital display warning for open or faulty probe is inactive in the differential mode DIFF Consult factory for further technical information and details in specific applications 6 0 AUXILIARY OUTPUT CONNECTOR optional 6 1 The 9 pin D shell connector on the back panel is used for the following auxiliary connections All signals are with respect to digital ground unless otherwise specified e Non linearized analog output with respect to a
4. the instrument and almost instant response of the probe Fluctuations can easily be elimi nated by bringing the probe into contact with a metallic object thus increasing its effective mass and slowing the response Using a larger probe will have the same results 11 10 Measurements on Solid Surfaces These are most easily made with surface probes such as our BT 1 and MT D The right angled tip provides the 10 diameters of probe contact specified in Section 11 6 Straight probes may also be used provided that sufficient shaft length is in contact with the surface to be measured In general the smaller the probe the more accurately it will measure the surface temperature of a solid For instance an MT 29 microprobe because of its small size needs to be in contact with the surface for as little as 1 8 SST 1 has a 1 4 gold disc sensor Gold is an excellent conductor and is non allergenic and non polluting It makes a fine skin surface probe 11 0 TEMPERATURE MEASUREMENT WITH THERMOCOUPLE SENSORS 11 1 The thermocouple is a simple and widely accepted device for measuring temperature It comprises two wires of dissimilar metals fused together to form a junction which produces an elec trical output proportional to temperature The National Institute of Standards and Technology NIST Monograph 125 1974 has tabulated the voltage temperature relationships of many com monly used thermocouple pairs their tables on copper constantan form the
5. One least significant digit Conforms to National Institute of Standards and Technology Monograph 125 Any Physitemp type T Thermocouple 15 45 C 3 1 2 digits BAT 10 4 alkaline C cells Battery life 1000 hours BAT 10R rechargeable unit 4 NI Cads LO BAT appears on display when battery voltage is low but several hours of life remain INPUT appears on display when open probe or input fault condition has occured ALARM acitivated by user supplied external 5V logic level Non linearized set at 1 5V corresponding to temperature of 401 C Linearized when supplied 1mV count 7 0 ANALOG OUTPUT FOR CHART RECORDING 7 1 NON LINEARIZED ANALOG OUTPUT BAT 10 is supplied with an analog output that is proportional to the input thermocouple voltage with respect to analog common This is adequate for most stirp chart recording applications where small temperature ranges are involved The output bears a non linear relationship to temperature and thermocouple tables can be used to compensate for linearity changes over wider temperature ranges The non linear output can be found on pin 1 of the 9 pin connector on the back of the instrument The return is pin 7 The 9 pin male D shell con nector part 6 2072 should be ordered if this output is to be used It can also be obtained from any electronic parts store 7 2 LINEARIZED ANAOLOG OUTPUT This is only supplied if specified at time of order It can be retrofitted only at factroy T
6. alibrated just like a mercury thermometer The following notes may help the user to avoid some of the errors most frequently made in temperature measurement 11 5 Faulty measurement technique with any type of thermometer can produce errors of several degrees Errors attributed to out of calibration equipment can often be corrected by a simple change of technique 11 6 Thermocouple probes like all other temperature sensing devices must be placed so that they reach as closely as possible the temperature of the material to be measured Probes are tip sensitive but when measuring the temperatures of liquids semi solids or hard surfaces it is not sufficient to bring only the tip into contact with the material being measured This is because there will be loss of heat along both the thermocouple wires and their sheath so readings will be low The effect can be greatly reduced if part of the metal sheath is also placed in contact with the mate 10 0 SPECIFICATIONS Temperature Range and Resolution Differential Temperature Range Accuracy 1 Range 0 1 Range Diff Range Repeatability Calibration Sensors Ambient Operating Range Readout Batteries Special Display Indications Analog output 200 C to 400 C 1 C resolution 100 C to 199 9 C 0 1 C resolution 19 99 C to 19 99 C Linearization centered at 40 C See Section 5 0 1 C 1 digit 0 1 C 1 digit 0 01 C 1 digit
7. basis for calibration of Physitemp thermometers 11 2 At one time accurate thermocouple temperature measurements needed elaborate poten tiometers and reference to a source of known temperature such as an ice bath The advent of mod ern solid state devices has made possible the design of an inexpensive thermocouple thermometer which is direct reading The first of these was Bailey thermometer BAT 4 which was designed in 1969 and is now in use throughout the world Your BAT 10 is an advanced version of the original equipment using the latest low power digital technology and compensated electronic reference cir cuitry 11 3 As compared with thermistor sensors which were formerly used exclusively in portable thermometers thermocouples have these advantages a Wide temperature range e g 200 C to over 1300 C b High stability of output c Interchangeability no recalibration required d Accuracy traceable to NIST calibrations 6 Low cost users can even make their own sensors f Microscopic size when needed as in Physitemp microprobes g Nearly instant response h Better measurement accuracy due to low mass with smaller heat loss 11 4 The main disadvantage of the thermocouple low sensitivity was overcome by the develop ment of auto zeroing amplifiers which are now used in all Physitemp thermometers This type of amplifier is essentially drift free It makes possible an electronic thermometer which is permanently c
8. bility to measure surface gradients giving almost instant readings at each point This feature enables heat sinks to be designed without guesswork for maximum efficiency with minimum metal It is equally easy to check the adequacy of thermal bonding between a power transistor or rectifier and its heat sink General purpose probe BT 1 is suitable for this and many other measurements When probes such as BT 1 and the larger HT 1 and HT 2 are used for surface measurements speed of response and accuracy can often be improved by use of a heat conductive material such as thermal grease or silicone grease applied between the probe and surface Note BT 1 HT 1 and HT 2 should not be used on electrically con ductive surfaces where voltages are present as the sensor is connected to the stainless steel sheath The following probes are isolated and suitable for use on electrical equipment RET 1 ESO 1 IT 14 IT 18 IT 21 TFT series 10 rial In liquids and semi solids the tip and sheath are simply immersed on solid surfaces the sheath is laid against the surface Here is a useful rough rule Heat leakage effects are substantially reduced when an amount of probe equal to 10 or more sheath diameters is immersed or laid on the surface For example with a probe of 1 16 diameter 10 x 1 16 10 16 625 the minimum immersion depth 11 7 Errors between thermocouple probes All Physitemp clinical probes and sensors are made with ther
9. he 9 pin male D shell connector is included with this option The output is directly proportioanl to the number of counts displayed and is equal to 1mV count with respect to digital common The linear analog output can be found on pin 6 of the 9 pi D shell connector on the rear of the instrument IMPORTANT The return is digital common pin 8 for example display reads 19 86 number of counts 1986 output is 1 986V Please note The linearized analog output uses a D A converter which updates at the same rate as the display approximately 3 times per second and therefore when temperature is changing rapidly step changes may be seen in the output voltage as the converter updates 8 0 BATTERY REPLACEMENT 8 1 NON RECHARGEABLE INSTRUMENTS IMPORTANT Use only alkaline batteries Switch instrument OFF Turning counter clockwise unscrew the two plastic caps from the battery holders on the back panel Slide old batteries out and replace with fresh cells Install with positive terminals towards the plastic screw caps Replace caps 8 2 RECHARGEABLE INSTRUMENTS Follow the instruction above but install four rechargeable N Cad batteries 9 0 RECHARGING THE BATTIERIES 9 1 Plug the Physitemp AC charger 9V 50 to 200mA AC into AC input socket on the back panel and connect to AC supply Allow 16 hours for complete recharging With Ni Cad batteries installed the unit may be continuously operated from the AC recharger WARNING The AC input
10. mocouple wire that has been specially tested to meet our own stringent standards Our clinical probes are guaranteed accurate to within 0 1 C in the range 0 50 C Copper Constantan type T thermocouples from other manufacturers are not normally this accurate Probes made from wire to special limits of error may be accurate to 0 5 C in this range This interchangeability of sensor including microprobes is a major advantage of Physitemp thermocouple thermometer 11 8 Measurements in Liquids These are quite easy to make because there is good thermal contact between liquid and probe The latter quickly reaches liquid tem perature and readings can be taken within a few seconds However a liquid which has been heated above or cooled below ambient will be losing or gaining heat and convection currents will give rise to tempera ture variations of up to several degrees These variations can be reduced by vigorous stirring This simple precaution must always be taken 11 9 Measurements of Air Temperature Temperature can vary widely in different parts of a room differences of at least several degrees will usually be noted When a microprobe is used to indicate air temperature readings will often fluctuate rapidly responding to actual temperature changes caused by air currents Breathing near the microprobe will produce wide fluctuations These effects indicate the sensitivity of the BAT 10 microprobe combination due to high discrimi nation of
11. nalog ground see Section 7 1 e Linearized analog output optional see Section 7 2 e Data True A gating signal active low The number of oscillator pulses during this period is four times the count displayed For example Display reads 38 1 C 381 counts Number of oscillator pulses in the data true period is 381x4 1524 e Oscillator output 52 7 20 e Alarm input User supplied signal active low 5V logic level e Sign out Low when negative e Analog common e Digital common e V Positive supply Consult factory for further information Phone 973 779 5577 Connection diagram PIN FUNCTION 1 Non linear Analog output Data True Oscillator Output Alarm In Sign Out Linear Analog Output Analog Common Digital Common V OMAN DO BW ND 4 2 Select the required range by depressing the 1 or 0 1 RANGE SELECT pushbutton Be sure that the DIFF pushbutton is not depressed 4 3 Direct measurements are made with inputs 1 and 2 If two probes are being used just depress the PROBE SELECT pushbutton which corresponds with the sensor to be monitored 5 0 5 1 32 5 3 DIFFERENTIAL MEASUREMENT TECHNIQUES Specifications of the differential range are as follows Resolution 0 01 C Accuracy 0 01 C 1 digit Repeatability 0 01 C Linearity is centered at 40 C Range 19 99 to 19 99 USING THE DIFFERENTIAL RANGE Before making measurements check and adjust the DIFF ZERO as follows Remove probes fr
12. nsidered expendable and are not covered by this warranty See separate warranty enclosed with probe For your protection please pack returned items carefully and insure them against possible damage or loss in transit Physitemp will not be responsible for damage resulting from careless or inade quate packaging Please return freight prepaid During the warranty period the instrument may also be returned for a free calibration check 11 11 11 Measurements in Electronics BAT 10 and ICT 4 provide the quickest and cheapest method of getting accurate reading on both discreet components and integrated circuits used in electronic equipment ICT 4 has two important differences from the regular MT 4 probe There is a 5 1 2 handle suitable for use in the hand or in a micromanipulator and the micro thermocouple protrudes slightly beyond the steel sheath and has some thermal isolation from it This probe was designed for use on areas of 5 100 microns in diameter and is used perpendicular to the surface to be measured The heat loss described in 11 3 occurs and temperature readings are slightly low normally about 0 5 C low Each probe can be readily calibrated on a larger surface First lay it parallel to the surface and note the reading Then take a reading with it perpendicular to the sur face note the difference Add this difference to the subsequent reading when using the perpendi cular position 11 12 BAT 10 with a suitable probe has the a
13. om all sockets Select DIFF range pushbutton Select DIFF ZERO Wait for about 30 seconds for reading to stabilize Adjust ZERO with screwdriver until it displays 0 00 Release DIFF ZERO Connect probes to INPUTS 2 and 3 only Read temperature difference between probes If probe in input 2 is at the higher temperature the temperature reading will be positive If probe in input 2 is at the lower temperature the temperature reading will be negative When making differential measurements with 0 01 resolution e Keep instrument away from drafts or sources of heat e When instrument is moved from one location to another allow at least one hour for temperature stabilization before use e Allow 10 15 minutes after plugging in probes before taking readings e While making measurements never touch probe plugs or allow them to come into contact with sources of heat or cold e Check DIFF ZERO periodically to ensure it has not drifted Reset as necessary using ZERO control e When making differential measurements in an electrically conductive medium at least one of the probes should be electrically isolated from the medium The fol lowing Physitemp probes are isolated RET 1 ESO 1 IT 14 IT 18 IT 21 IT 23 IT 1E TFT series We can also supply an insulated version of our MT 23 micro probes if requested 1 0 INTRODUCTION 1 0 Physitemp laboratory thermometers are compact digital thermometers for use with type T thermocouple senso
14. phyemp PHYSITEMP INSTRUMENTS INC 154 Huron Avenue Clifton NJ 07013 U S A Tel 973 779 5577 Fax 973 779 5954 e mail physitemp aol com OPERATING MANUAL BAT 10 Multipurpose Thermometer 12 0 REPAIRS AND RECALIBRATION 12 1 In the event that a BAT 10 Thermometer is to be returned for repair and recalibration please pack it with care and send it prepaid to Physitemp Instruments Inc Service Department 154 Huron Avenue Clifton NJ 07013 USA Please include with the instrument 1 A note describing any problems encountered 2 The name and telephone number of the user or other person we can contact 3 The complete return address for shipping 12 2 A Service Manual for the BAT 10 is available at additional charge It includes schematic component locator trouble shooting guide and complete calibration instructions Specified test equipment is required for recalibration or other servicing Consult Physitemp for further service information by telephone at 973 779 5577 or fax 793 779 5954 12 3 Physitemp Instruments Inc warrants this instrument to be free from defects in material and workmanship for 12 months from date of shipment Repair or replacement will be made at no charge at the discretion of Physitemp if the defect is not the result of misuse or abuse Physitemp accepts no consequential liabilty for delay in delivery alleged faulty performance of the product or for any other cause Cables and probes are co
15. rs The BAT 10 thermometer has two probe inputs for direct temperature read ings with a resolution of 0 1 C or 1 C A third input is used when differential measurements are made On the differential range temperature resolution is 0 01 C BAT 10 accepts all Physitemp type T thermocouple probes 2 0 INITIAL INSTALLATION 2A Set the handle angle bracket to the position most convenient for your application Pull out both side bars slightly at the same time Adjust as necessary then allow to snap back into place 22 BATTERY OPERATED UNITS are supplied with four alkaline C cells installed and are ready for operation 2 3 RECHARGEABLE UNITS are supplied with fully charged Nicad batteries installed and a charger kit that is also an AC adaptor To recharge and for AC use connect the power jack on the recharger kit to the AC INPUT socket on the back of the instrument Plug the charger into a live outlet Charger is for use with 110 115V AC unless otherwise specified on your order Charger will be labelled for correct voltage See Section 9 0 for further information 3 0 OPERATING INSTRUCTIONS 3 1 The following instructions are printed on a label on the top panel of the BAT 10 They are reprinted here in case the label is ever defaced See Sections 4 0 and 5 0 for detailed information TEMPERATURE RANGE RESOLUTION 3 SPECIAL DISPLAY INDICATIONS 200 C to 400 C 1 C Probe is above or below limits ii range 100
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