DT4947SD - General Tools And Instruments
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1. GENERAL DT4947SD USER S MANUAL 4 CHANNEL THERMOMETER WITH DATALOGGING SD CARD Please read this manual carefully and thoroughly before using this product TABLE OF CONTENTS Introduction 2i2oosaoe osa 3 Key Features 4 Operating 5 4 11 What s the case 4 5 DE Guislssazescdsata 6 7 Adjusting Probe Offsets 8 Normal Operation 8 9 Holding and Storing Measurements 9 Automatic vs Manual Datalogging 9 10 Transferring Data from the SD Card 10 11 Specifications 1 22222 Rx Ram nn nx mx xxx 12 Maintenance Tips 13 Optional 5 13 Warranty Information 13 Return for Repair Policy 14 INTRODUCTION Thank you for purchasing General Tools amp Instruments DT4947SD 4 Channel Thermometer with Datalogging SD Card Please read this user s manual carefully and thoroughly before using the instrument The DT4947SD is a general purpose handheld instrument that can measure up to four channels of temperature with 0 496 accuracy using either of two kinds of optional accessories thermocouples or Pt 100 ohm probes resistance temperature detectors or RTDs RTDs are slowly replacing thermocouples in many industrial applica2. J T E R and S thermocouples A 9VDC adapter for a 110V power supply Figure 1 shows all of the controls and indicators on the front right side back top and bottom of the DT4947SD Familiarize yourself with the positions and functions of these controls indicators and connectors before moving on to the setup procedure FRONT 1 15 1 14 1 16 1 17 1 10 1 11 1 12 1 13 Fig 1 The DT4947SD s controls and indicators and other physical features 1 1 Liquid crystal display 1 2 POWER ESC button 1 3 HOLD NEXT button 1 4 REC ENTER button 1 5 Type A button 1 6 T1 T2 W button 1 7 SET button 1 8 LOGGER OFFSET button 1 9 T1 through T4 thermocouple jacks 1 10 PT1 input jack 1 11 PT2 input jack 1 12 RS 232 output jack 1 13 Socket for 9VDC AC adapter 1 14 Tripod attachment nut 1 15 Battery compartment cover screws 1 16 Battery compartment cover 1 17 Kickstand 1 18 SD card socket SETUP 1 Choose the power source Before using the DT4947SD make sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the bottom jack on its right side callout 1 13 To remove the battery compartment cover callout 1 16 remove the two screws holding it in place callout 1 15 Then install six AA batteries in the correct orientation using the polarity marks on the inside of the compartment as a guide Replace the cover by replacing the two screws 2 Install an SD card To prepare f
3. T2 KTemp 278 13 KTemp 278 T4 KTemp C 13 12 2009619 11 02 21 277 KTemp 278 T2 KTemp 278 13 KTemp 275 14 KTemp C 14 13 2009 56 19 11 02 22 2777 11 KTemp 278 T2 K Temp 279 T3 KTemp 278 T4 KTemp C 15 14 2009 19 11 02 23 2777 KTemp 278 2 KTemp 279 13 KTemp 27 8 14 KTemp C 16 15 2009 6 19 11 02 24 27 7 T1 KTemp 27 8 T2 KTemp 279 T3 KTemp 278 T4 KTemp C 17 16 2009 6 19 11 0225 27 7 KTemp 278 T2 KTemp 279 T3 KTemp 278 T4 KTemp C 18 17 2009619 11 02 26 277 KTemp 27 8 2 27 9 13 KTemp 278 T4 KTemp C 19 18 2009619 11 02 27 27 7 KTemp 279 T2 KTemp 279 T3 KTemp 279 T4 KTemp C 20 19 2009 6 19 11 02 28 278 KTemp 279 12 KTemp 279 T3 KTemp 279 T4 KTemp C 21 20 2009 6 19 11 02 29 29 3 1 KTemp 279 T2 KTemp 279 T3 KTemp 279 T4 KTemp C 22 21 2009 6 19 11 02 30 32 3 KTemp 279 T2 KTemp 279 T3 KTemp 279 T4 KTemp C 23 22 2009 6 19 11 02 31 32 3 T1 KTemp 30 1 T2 KTemp 279 T3 KTemp 279 T4 KTemp C 24 23 2009 6 19 11 02 32 308 KTemp 30 1 T2 KTemp 292 T3 KTemp 279 4 KTemp C Fig 2 Typical Excel data only screen Pirate Toc El Theat T ion aA 7 11 44 TA Limmat 40 35 30 25 20 15 10 5 0 O ar gt A gt gt gt 0 9 eee e e e a Fr aa d a L ooa aS 9 COCA S9 lt Fig 3 Typical Excel graphics only screen 11 SPECIFICATIONS Embedded microcontroller Custom one chip LSI device Display type Liquid crystal with
4. green backlight Display size 2 05 x 1 5 in 52 x 38mm Parameter measured Temperature in F or C Measurement range For Pt 100 ohm probes 327 to 1562 F for thermocouples depends on type Measurement accuracy For Pt 100 ohm probes 0 4 of reading 1 8 F from 327 to 999 9 F 0 4 of reading 2 0 F from 1000 to 1562 F for thermocouples 0 4 of reading 2 0 F max Measurement resolution For Pt 100 ohm probes 0 1 F or C from 327 to 999 9 F 1 F from 1000 to 1562 F for thermocouples 0 1 F or C below 1000 F and 1 F or C above 1000 F for Types K J T and E 1 C or F for Types R and 5 Sampling time options 0 1 2 5 10 30 60 120 300 600 1800 or 3600 seconds 0 seconds to 1 hour Settable parameters Date time decimal point or comma decimal division auto power off beep sound temperature unit sampling time Storable recallable readings Maximum minimum SD card capacity 1 GB to 16 GB Operating temperature 32 to 122 F 0 to 50 C Operating relative humidity 0 to 8596 Power source 6 Alkaline AA batteries or optional 9 VDC AC adapter Power consumption 8 5 mADC normal operation with backlight off and SD card not saving data 30 mADC with backlight on and card saving data 44 mADC with backlight on and card saving data Dimensions of thermometer 6 97 x 2 68 x 1 77 in 177 x 68 x 45mm Weight of thermometer 1 13 Ib 5150 MAINTEN
5. ANCE TIPS Keep your probes and thermocouples clean When the icon X appears in the left corner of the display it s time to replace the six AA batteries that power the thermometer although measurements will remain valid for several hours after the low battery indicator first appears Replacing the batteries requires removing the two screws that hold the battery compartment cover in place as explained in Step 1 of the setup procedure on page 6 After inserting fresh batteries in the correct orientation tighten the screws to secure the cover Remove the batteries when storing the thermometer for an extended period of time Do not drop or disassemble the thermometer or immerse it in water OPTIONAL ACCESSORIES Optional accessories available from General Tools amp Instruments include e Pt 100 ohm resistance temperature detector RTD probes Types K J T E Rand S thermocouple thermometers e 9VDC adapter for a 110V power supply WARRANTY INFORMATION General Tools amp Instruments General s DT4947SD 4 Channel Thermometer with Datalogging SD Card is warranted to the original purchaser to be free from defects in material and workmanship Subject to certain restrictions General will repair or replace this instrument if after examination the company determines it to be defective in material or workmanship for a period of one year This warranty does not apply to damages that General determines to be from an attempted repair by no
6. being used or when a used card is being repurposed from use with another SD card instrument or a camera for example and all data on it is to be erased Choose no to preserve any data on a card previously used with this instrument If you choose yES after you press the REC ENTER button the instrument will prompt you to confirm that decision by displaying the term Ent below yES and sounding three beeps To confirm that you want to begin the erasure formatting procedure press the REC ENTER button Ent will then flash several times and the instrument will sound another three beeps to confirm that the SD card has been erased and formatted Once the SD card has been set up the display will then either return to the first of the seven steps in the setup sequence setting the current date and time or show the term ESC If ESC appears press the POWER ESC button to exit the setup procedure and enter normal operating mode ADJUSTING PROBE OFFSETS To maximize the accuracy of measurements General strongly recommends that you compensate for offset the small measurement error peculiar to each thermocouple and RTD used with the instrument 1 To adjust the offset of a thermocouple press the Type A button until the thermocouple s type appears on the display Then plug the thermocouple into the T1 jack on the top of the thermometer Press the LOGGER OFFSET button hold it for at least three SE OFS sates 23 7 23 7 secon
7. ds and then release the button A screen similar to the one at right should appear all oe Next use the Type A or T1 T2 W button to adjust the value under oFS to match the value under SEt Then press the REC ENTER button to store the offset adjustment and return the thermometer to measurement mode Repeat the procedure for each thermocouple to be used 2 To adjust the offset of a Pt 100 ohm probe press the Type A button as many times as necessary until the term Pt appears the display Then plug the Pt probe into the PT1 jack callout 1 10 of Fig 1 on the right side of the thermometer Press the LOGGER OFFSET button hold it for at least three seconds and then release the button A screen similar to Fa 1 2 the one at right should appear Next press the Type A button which has the letter L m stenciled over it A screen similar to the one at right should appear measuring adjust value value Use the Type A or T1 T2 W button to adjust the value under oFS to match the value under SEt Finally press the REC ENTER button to store the offset adjustment and return the thermometer to measurement mode Repeat the procedure for each RTD to be used NORMAL OPERATION 1 To prepare to make measurements power on the DT4947SD and make sure an SD card is firmly seated in the socket on the bottom of the unit By default the DT4947SD uses Celsius units for temperature measurements If
8. es or RTDs already plugged into the Wm T instrument press the T1 T2 button with the T1 262 1 2 i i T2 Y thermometer in normal measurement mode Doing __ di so will cause the following screen to appear Whenever the thermometer is in measurement mode you can turn off the backlight which is on by default by briefly pressing but not holding the POWER ESC button To reactivate the backlight briefly press the button again Whenever the instrument is in measurement mode you also can check the current date and time by briefly pressing the SET button which has the words Time check stenciled to its right Doing so causes both values to appear briefly at the lower left of the display HOLDING AND STORING MEASUREMENTS 1 To hold a measured value press the HOLD NEXT button during the measurement Doing so will cause the word HOLD to appear at the top of the display Pressing the HOLD NEXT button again releases the hold 2 To record and recall readings press the REC ENTER button while making measurements This will make the term REC appear at the top of the display Pressing the REC ENTER button again briefly will make the term MAX appear to the right of REC and switch the display to the maximum value stored in memory during the last recording session Pressing the REC ENTER button again briefly will make the term MIN appear to the right of REC and switch the display to the minimum value st
9. ff the DT4947SD after a period of inactivity of ten minutes 6 Enable or disable the beeper Once the auto power off function has been enabled or disabled the display will show the word yES over the word bEEP Press the Type A orT1 T2 W button until the desired setting yES or no is displayed and then press the REC ENTER button to store the selection as the default 7 Select the temperature unit Once the beeper has been enabled or disabled the lower part of the display will show the term t CF Press the Type A or T1 T2 W button until the unit you prefer F for Fahrenheit C for Celsius is displayed Then press the REC ENTER button to store the selection as the default 8 Set the datalogging sampling time Once the default temperature unit has been selected the display will show a value above the letters SP t Press the Type A or T1 T2 W button to decrease or increase the value until the desired sampling time appears above SP t The options are 0 1 2 5 10 30 60 120 300 600 1800 and 3600 seconds 0 seconds to 1 hour 9 Format the SD card Once the sampling time has been set and stored the term Sd F will appear in the lower half of the display Press the REC ENTER button Pressing the REC ENTER button causes the word no or yES to appear over the term Sd F Press the Type A or T1 T2 W button to make a selection Choose yES whenever a new SD card is
10. he top line of the display TRANSFERRING DATA FROM THE SD CARD TO A COMPUTER After automatic or manual datalogging of measurements remove the SD card from the instrument and plug it into your computer either directly if it has an SD card slot or through an SD card reader Because the files containing time stamped data logs have the file extension xls they open in Microsoft s Excel application Figures 2 and 3 show two kinds of Excel presentations a data only screen and a graphics only screen Ball B HN Y F G 1 Date Time Value Unit Value Unit Value Unit Value Unit 2 1 2009619 11 02 10 27 6 KTemp 27 7 T2 KTemp 277 13 KTemp 277 T4 KTemp C 3 2 2009 19 11 02 11 276 KTemp 2777 T2 KTemp 27 7 T3 KTemp 277 4 KTemp C 4 3 2009 19 11 02 12 276 KTemp 27 7 12 KTemp 27 7 13 KTemp 27 7 T4 K Temp C 5 4 20096 9 11 02 13 276 KTemp 27 7 12 K Temp 277 KTemp 27 7 T4 K Temp C 6 5 2009 6 19 11 02 14 276 T1 KTemp 27 7 2 K Temp 27 7 T3 KTemp 2777 14 K Temp C T 6 2009 6 19 11 02 15 27 7 KTemp 27 7 T2 KTemp 27 7 T3 KTemp 27 7 T4 KTemp C 8 7 2009 6 19 11 02 16 27 7 11 KTemp 27 7 12 KTemp 278 T3 KTemp 278 T4 KTemp C 9 8 2009 19 11 02 17 27 7 11 KTemp 2177 12 KTemp 278 13 KTemp 278 T4 KTemp C 10 9 2009 19 11 02 18 277 1 278 2 KTemp 278 T3 KTemp 278 T4 KTemp C 11 10 2009 19 11 02 19 27 7 T1 KTemp 278 2 KTemp 278 T3 KTemp 278 T4 KTemp C 12 11 20096 19 11 02 20 27 7 11 KTemp 278
11. manually set the sampling time to zero using by performing Step 8 of the setup procedure Then press the REC ENTER button once The display will show the term REC on the top line a value in the middle and below it the letter P on the left and a number from 1 to 99 on the same line to the right The number indicates the position on the SD card that will be used to store manually logged data Now press the LOGGER OFFSET button This will cause the beeper to sound and the term LOGGER to briefly appear at the upper right of the display As in automatic datalogging mode in this mode the instrument is storing measurements and their time stamps on the SD card In manual datalogging mode however measurements are being stored continuously with a sampling time of zero and their locations on the card can be changed 5 To change the storage location of manually logged data press the SET button once this causes the P to disappear from the left side of the display and the value on its line to begin flashing Once the flashing begins you can use the Type A or T1 T2 W buttons to change the flashing value to any number between 1 and 99 Once you have chosen the storage location press the REC ENTER button to save the setting This causes the value to stop flashing and the P to return 6 To end manual datalogging press the REC ENTER button and hold it for at least three seconds This action causes the REC message to disappear from t
12. mputer either directly or through an SD card reader The data logs are stored on the card as files with the xls extension which can be opened by Microsoft s Excel application The DT4947SD has a backlit 2 1 2 in diagonal display and is powered by six AA Alkaline batteries or an optional 9 VDC AC adapter KEY FEATURES e Four independent temperature measurement channels Also measures T1 T2 difference between two channels e Works with and automatically temperature compensates for six popular thermocouple types K J T E S and R e Combining thermocouple types extends overall measurement range 10 148 to 3092 F 100 to 1700 C Big 2 5 in diagonal front panel green backlit LCD is easy to read e Displays maximum and minimum readings and holds any reading Automatically logs measurements at sampling time settable from one second to one hour Also supports manual datalogging and changing of SD card storage location e Outputs Excel compatible data logs Accepts SD memory cards of up to 16 GB capacity Auto power off function Powered by six AA batteries or optional 9V AC DC adapter OPERATING INSTRUCTIONS WHAT S IN THE CASE The DT4947SD comes fully assembled in a carrying case along with two Type K thermocouples a 2 GB SD memory card and this user s manual Optional accessories available from General Tools amp Instruments include e Pt 100 ohm resistance temperature detector RTD probes Types K
13. n authorized personnel or misuse alterations normal wear and tear or accidental damage The defective unit must be returned to General Tools amp Instruments or to a General authorized service center freight prepaid and insured Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product In no event shall General be liable for any incidental special consequential or punitive damages or for any cost attorneys fees expenses or losses alleged to be a consequence of any damage due to failure of or defect in any product including but not limited to any claims for loss of profits RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality However in the event your instrument requires repair please contact our Customer Service to obtain an RGA Return Goods Authorization number before forwarding the unit via prepaid freight to the attention of our Service Center at this address General Tools amp Instruments 80 White Street New York NY 10013 212 431 6100 Remember to include a copy of your proof of purchase your return address and your phone number and or e mail address NOTES Specialty Tools amp Instruments GENERAL TOOLS amp INSTRUMENTS 80 White Street New York NY 10013 3567 PHONE 212 431 6100 FAX 212 431 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www gene
14. or setup also install the included 2 GB SD memory card or another card of 1 GB to 16 GB capacity in the socket on the bottom of the thermometer callout 1 18 When installing the card make sure its gold contacts are facing front and push the card into the socket until you hear a click To remove the card push it in until you hear a click and the card pops out Now power on the instrument by pressing the POWER ESC button callout 1 2 to generate a short beep To power off the DT4947SD press the POWER ESC button and hold it until the instrument responds with a long beep When the thermometer powers on a series of transient startup screens will briefly appear Once the display has stabilized perform the following seven setup steps in the order presented 3 Set the date and time Press the SET button callout 1 7 and hold it for at least five seconds until the word dAtE appears in the center of the display along with the flashing value 00 00 00 at the lower left above yy mm dd Set the current year by pressing the Type A or T1 T2 W button repeatedly until the correct value appears above yy Quickly within three seconds press the REC ENTER button to store the setting The next screen that appears will have the value above flashing Use the Type A or T1 T2 W button to navigate to the current month and press the REC ENTER button to store the setting When the next screen flashes the value above dd again u
15. ored during the last session 3 To exit recording mode press the REC ENTER button and hold it for at least three seconds until the term REC disappears from the top line of the display The display will then revert to showing the current reading AUTOMATIC VS MANUAL DATALOGGING The DT4947SD can automatically log data with a user selected sampling period from 1 second to 3 600 seconds one hour To view the sampling time that the instrument has been set up to use press the LOGGER OFFSET button which has the words Sampling check stenciled below it once To change the sampling time perform Step 8 of the setup procedure 1 To start automatic datalogging press the REC ENTER button once The top line of the display will then show the term REC Pressing the LOGGER OFFSET button at this point will make REC flash and add the flashing term LOGGER at the top right of the display This indicates that the instrument is currently storing measured values and their time stamps in memory 2 To pause automatic datalogging press the LOGGER OFFSET button once this action makes the flashing term LOGGER disappear from the top right of the display and changes the term REC from flashing to constant Pressing the LOGGER OFFSET button again resumes automatic datalogging 3 To end automatic datalogging press the REC ENTER button and hold it for at least two seconds This action causes the REC message to disappear 4 To log data
16. raltools com DT4947SD User s Manual Specifications subject to change without notice 2010 GENERAL TOOLS amp INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN DT4947SD 6 9 11
17. se the Type A or T1 T2 W button to navigate to the current day and press the REC ENTER button to store the setting If you press buttons too slowly in setup mode the screen will revert to the normal display To return to the setup sequence press and hold the SET button again To move ahead to the next field in the sequence or to the next parameter press the HOLD NEXT button Once you have set the date the display will prompt you to set the hour minute and second of the current time Again use the Type A or T1 T2 W buttons to navigate to the correct values and the REC ENTER button to store the settings 4 Choose a decimal point or comma to represent the decimal division between integers and fractions for example American style 20 88 vs European style 20 88 Once you have set the date and time the display will show the word bASIC above the phrase dEC Press the SET button to make bASIC American style or Euro appear in the upper display as desired Press the REC ENTER button to store the selection as the default 5 Enable or disable auto power off Once the format of decimal point divisions has been set and stored the display will show the word yES over the term PoFF Press the Type A or T1 T2 Y button until the desired automatic power off management scheme yES for enable no for disable is displayed Press the REC ENTER button to store the selection If enabled the power off function shuts o
18. tions below 1100 F 600 C due to their superior accuracy and repeatability When used as inputs to the DT4947SD Pt 100 ohm probes can measure and display temperatures from 328 to 1562 F 200 to 850 C Although thermocouples are not as accurate as other types of thermometers they more than make up for this shortcoming with an extended measurement range For example the DT4947SD can measure and read out temperatures from 148 to 2372 F 100 to 1300 C using Type K thermocouples and temperatures from 148 to 2192 F 100 to 1200 C using Type J thermocouples Type R and Type S thermocouples have an even higher upper limit These very wide ranges plus a fast response time and a low price tag suit thermocouple thermometers for a variety of commercial and industrial tasks requiring measurement of very high and low temperatures Examples include applications in the food and chemical processing industries HVAC heating ventilation and air conditioning power generation and paper production Because it is microprocessor based the DT4947SD can make full use of the portability reliability and large storage capacities that SD memory cards offer Measurements can be made automatically at any sampling rate between one second and one hour After time stamping and storing the measurements on an SD card plugged into the instrument a process called datalogging the user can remove the card and plug it into to a laptop or desktop co
19. you wish to make Fahrenheit units the default press the SET button to enter the setup procedure and perform Step 7 2 To use Type K thermocouples to measure up to four channels of temperature plug one to four of the devices two are included into the jacks callout 1 9 of Fig 1 on the top of the thermometer Because Type K is the instrument s default thermocouple type plugging in the accessories will instantly produce display readings Any of the four channels that are not used will show the overrange reading p 3 To use Type J T E R or S thermocouples to measure up to four channels of temperature first press the Type A button as many times as necessary until the letter of the thermocouple type you are using appears on the display Then plug one to four of the optional accessories into the jacks on the top of the thermometer As with Type K thermocouples display readings are instantaneous 4 To use Pt 100 ohm probes resistance temperature detectors to measure up to two channels of temperature first press the Type A button as many times as necessary until the term Pt appears on the right side of the display Then plug one or two of the optional accessories into the dedicated jack s on the right side of the thermometer callouts 1 10 and 1 11 As with thermocouple measurements RTD measurements appear instantly on the display 5 To measure the temperature difference between any two channels represented by thermocoupl
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