Data Logging Hot Wire Anemometer
Contents
1. Advanced Settings Menu which is detailed in the next section beginning on p 12 10 Fig 7 is a flowchart of the menu made available by briefly pressing the MODE SET button starting from normal measurement mode one press of the button makes all three readouts show the maximum values of the three main parameters measured since the meter was powered up The term MAX appears at the lower left of the display to indicate what the readings represent v ii 7 Measuring Normal Measuring Mode MAX Three readouts show maximum values since power on MIN Three readouts show minimum values since power on AVG Three readouts show average values since power on Three readouts show the parameters stored together at the same in nonvolatile memory Fig 7 The menu made available by briefly pressing the MODE SET button Pressing the MODE SET button again switches the readouts to show the minimum MIN values of the three parameters measured since the meter was last powered on Pressing the button a third time switches the readouts to show the average AVG values of the three parameters RECALLING AND ERASING STORED READINGS Pressing the MODE SET button a fourth time begins retrieval and display of the measurements stored in nonvolatile memory The first set of three values retrieved are the three measurements most recently stored Their memory location is indicated by2. End users also can store up to nine sets of the three readings air speed or airflow volume air temperature and IR temperature in an internal nonvolatile memory and recall them at any time in chronological order In addition to storing the nine sets of readings the CIH20DL also can capture over long periods of time and time stamp up to 20 000 air speed airflow volume air temperature and surface temperature measurements at a user selected sampling rate from 5 seconds to 1 hour These time stamped readings called data logs can be copied to a PC running Windows 7 Windows Vista or Windows XP via an included USB cable Once in the computer the logs can be displayed as graphs or tables formats that make it easy to spot trends or unexpected excursions in readings Windows 7 Windows Vista and Windows XP are registered trademarks of Microsoft Corporation The CIH20DL can be configured to display air speed in any of five Imperial or metric units airflow volume in CFM or CMM and temperature in degrees Fahrenheit or Celsius The instrument s IR thermometer which can be precisely aimed by a low power laser pointer assumes by default that its target has an emissivity of 0 95 which is true for 90 of applications The meter is normally powered by one 9V battery included To enable long term data logging the meter also can be powered by a 110V or 220V AC supply When the meter is powered by the battery it automatically shuts off af
3. at user selected sampling rate from 5 seconds to 1 hour e Included USB cable and interface data logging software enable transfer of stored data logs from the meter s internal memory to a PC for tabular or graphic display and analysis e Data hold and auto power off functions e CE and RoHS approved SAFETY INSTRUCTIONS CAUTION The CIH20DL s targeting laser is a Class II type that emits less than 1mW of power between 630nm and 660nm Avoid direct eye contact with laser light radiation U S law prohibits pointing a laser beam at aircraft doing so is punishable by a fine of up to 10 000 and imprisonment WHAT S IN THE CASE The CIH20DL and its accessories come in a custom molded plastic case The instrument itself has two main components a handheld meter with a digital display and a telescoping metal probe with two sensors at one end and a plug for connecting the probe to the meter at the other Also in the case are the following accessories e A USB cable for connecting the meter to a Windows computer enabling the meter to upload captured air speed airflow volume and surface temperature data This cable has a mini B type plug at one end and an A type plug at the other e An AC adapter and power cable for connecting the meter to a 110V or 220VAC supply to enable long term data logging This cable has a mini B type plug at one end and a socket with a spring loaded latch at the other The latch makes it easy to attach and detach eith
4. is powered on On most consumer DVRs you can retrieve video received at any time from the present until one hour ago unless the channel is changed On the CIH20DL the length of the corresponding reverse time interval is a function of the default sampling time To upload this Record data click on the STOP UPLOAD virtual button under RECORD at the bottom of the dashboard see Fig 11 The button label will change to UPLOAD Wait a minute or two and then click on UPLOAD You will then be prompted to choose a storage location for this txt xlsx Data Record file You can also rename the file now To avoid confusing this file and other files General suggests that you add the date as a suffix to the generic Data Record file name and store the file on your computer s desktop Once you have done so click the OK button of the dialog box Locate the file on your desktop double click on its icon and open the file in Microsoft Excel Microsoft Notepad or Microsoft WordPad Depending on the version of Excel you are using you may be prompted to verify the integrity of the file by clicking Yes prior to opening it Note the tabular format of the data as well as the column headings and the time stamps the third column in Notepad and WordPad and Column C in Excel As explained earlier Record data comprises three sets of readings IR Temperature Air Velocity and Air Temperature that are expressed in default units and displayed in chronological ord
5. proof of purchase your return address and your phone number and or e mail address 23 APPENDIX 24 mm 25 200 509400 759600 inches 198 The field of view of the CIH20DL s IR thermometer HOW TO MAKE ACCURATE IR MEASUREMENTS The CIH20DL has a distance to spot 0 5 ratio of 8 1 This means that the target area spot whose infrared radiation temperature is being measured increases in diameter by 1 inch for every 8 inches you move away from the target Conversely the diameter of the target area measured decreases by 1 inch for every 8 inches you move closer to the target All IR thermometers IRTs including the CIH20DL take the average temperature of all objects within a circular target area spot Although the distance D in the 0 5 ratio is defined as a linear value and the S defines the diameter of the spot see above figure the critical parameter is the target area Depending on the distance to the target the object whose temperature you want to measure the target area may include both the target and background objects near or behind the thermometer s field of view which defines the target area or spot To explain the relationship between 0 5 ratio and measurement accuracy consider how the CIH20DL would be used to measure the temperature of a small AC motor suspected of overheating The motor measures approximately 1 ft x 1 ft so it has an area of 1 2 If the CIH20DL is used to make the measurement from 2
6. readout and cause the kj HOLD icon to appear above it Held measurements are erased when the meter is powered off To release the hold press the button again The CIH20DL contains enough nonvolatile memory to store nine sets of three readings air speed or airflow volume air temperature and surface temperature To store a set of three measurements first make sure the meter is in normal measurement mode or measurement hold mode Then note the number to the right of the word DATA at the lower left of the display and briefly press the button Doing so will store the values shown by all three readouts in the indicated memory location and then advance the location counter by one The new number DATA X 1 is the memory location that will be used the next time the button is pressed While the readings are being stored the meter will continue to operate in normal measurement mode In contrast to held readings readings stored in nonvolatile memory are not erased when the meter powers off However a reading will be overwritten if its memory location is next in the queue when the button is pressed DISPLAYING MAXIMUM MINIMUM AND AVERAGE VALUES The MODE SET button is the gateway to two multi option menus The menu that opens depends on how long you press the button Pressing the MODE SET button briefly lets you choose to display values other than real time measurements on the three readouts Pressing and holding the button opens up the
7. 0 01 knots 0 to 2 5 million CFM 0 to 72 000 CMM 3 of reading 1 CMM 1 CFM from 0 to 99 999 CFM 10 CFM from 100 000 to 999 999 CFM 100 CFM from 1 000 000 to 2 500 000 CFM 32 to 158 F 0 to 70 C 3 of reading 0 1 F 0 1 C 25 to 999 F 32 to 538 C 5 4 F 3 C from 25 to 4 F 32 to 20 C 3 6 F 2 C from 4 to 212 F 20 to 100 C 2 of reading from 212 to 999 F 100 to 538 C 0 1 F 0 1 C 0 95 fixed 8 1 0 01 to 322 92 ft in increments of 0 01 ft or 0 001 to 30m in increments of 0 001 m 5 seconds to 59 minutes 59 seconds 9 sets of 3 readings 20 000 points After 10 minutes of inactivity on battery power after 30 minutes of inactivity on AC power disabled when meter is running on AC power in Data Logging mode 15 seconds 1 69 x 24 in 33 x 51mm 32 to 122 F 0 to 50 C 10 to 90 RH 14 to 140 F 10 to 60 C 7 24 x 2 75 x 1 57 in 184 x 70 x 40mm 11 3 oz 320g 70 8 in 1 8m 1 9V battery included 10 88 x 10 50 x 2 88 in 276 x 267 x 73mm 44 5 oz 1 26kg MAINTENANCE TIPS Remove the battery before storing the meter for an extended period of time Do not drop or disassemble the meter or immerse it in water WARRANTY INFORMATION General Tools amp Instruments General s CIH20DL Data Logging Hot Wire Anemometer with CFM CMM and 8 1 IR Thermometer is warranted to the original purchaser to be free from defects in m
8. 2f GENERAL 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 generaltools com CIH20DL User s Manual Specifications subject to change without notice 2011 GENERAL TOOLS amp INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN CIH20DL 12 21 11
9. 4 ft away the reading will have a large error At this distance the target area is 3 ft Therefore the CIH20DL will measure not just the temperature of the motor but also the temperature of the physical surroundings in its field of view and average the two readings How inaccurate would the measurement be If the motor s operating temperature is 200 F and the background temperature is 75 F and the motor s area is half the target area at the measurement distance the following equation gives the average temperature of the target area Tmotor 2 Solving for Tavg we get 200 75 2 or 137 5 F which is what the 2001 would display In other words trying to measure the temperature of the motor from 24 ft away introduced an error of 200 137 5 200 or 31 into the measurement In this case the measured temperature was 31 below the motor s actual temperature because the background is cooler than the motor To eliminate measurement error the CIH20DL must be moved close enough so the motor is the only object in the target area of its IRT see below figure For a motor with an area of 1 ft and using an IRT with a D S ratio of 8 1 the optimum measurement distance would be 8 ft For best results the targeted area spot should fall within the target s boundaries wall Measuring a motor s temperature from the wrong top and right bottom distance 25 26 NOTES NOTES
10. GENERAL DATA LOGGING HOT WIRE ANEMOMETER with CFM CMM and 8 1 IR THERMOMETER USER S MANUAL CIH2ODL Please read this manual carefully and thoroughly before using this product TABLE OF CONTENTS IHFOHLCDOIT seus aerae 9 8 3 4 Key Features ooo sos a draco ouo DPA IRE s 4 Safety Instructions x3 cx aae die Je EIER CROCI CD dC CERCA 5 What s in the GaSe Eae CACHER UR cod 5 Product Overview i uacua sca d eae ea awe aaa 5 7 Setup Instructions u icr CA Cine deta keene ed cane C CICER cere 8 Battery eR EE 8 Operating Instructions nnn n nn n 8 21 Getting Started CECI 8 9 Measuring Air Speed and Temperature 9 Measuring Airflow Volume 9 Measuring Surface Temperature 10 Holding and Storing Measurements 10 Displaying Maximum Minimum and Average Values 10 11 Recalling and Erasing Stored Measurements 11 12 Using the Advanced Settings Menu 12 13 Data Logging with a 14 21 Install Software and Drivers 14 15 Connecting the Meter to Your Computer 15 Viewing Real T
11. NG If your computer is running the 64 bit version of Windows7 NEVER disconnect the CIH20DL from the computer by unplugging either end of the USB cable without first closing the Anemometer AP IR A application Disconnecting the meter while the application is running will cause your computer to crash shut down hard with the same consequences as losing power or pressing and holding the POWER button every time When your computer crashes all open applications will close immediately and all of your unsaved work will be lost If you do not know which version of Windows you are running right click the My Computer icon on your desktop or double click Computer in Windows Explorer In the System section the System type line will indicate whether you are running the 32 bit or 64 bit version of Windows7 On the dashboard the default units are F for temperature and m s for air speed To change the air speed unit left click the red box containing m s and select one of the four other units as the default To switch to F as the IR and air temperature unit click on F in the red box These defaults must be reset each time you the open the program Using the Meter to Log Data Before logging data close the Anemometer AP program and disconnect the CIH20DL from your computer in that order see Warning on p 16 You should then use the Advanced Settings Menu see p 12 and following to set the current time and date in the meter Doing s
12. TAB RECALL 17147 E of O OO DOD OO Fig 2 All possible display indications Clock backlight on and laser pointer enabled icons Secondary readout Memory Space CLR clear and Memory indications X10 and X100 indications Primary readout MAX MIN and AVG display indications DATA RECALL and DATA LOG indications PC LINK indication IR Temperature HOLD indication Battery charge indicator IR temperature measurement unit C or F Time and date field indications Anemometer HOLD indication Air speed and airflow volume measurement units Tertiary readout SETUP INSTRUCTIONS INSTALL BATTERY The meter s battery compartment is accessible from the back of the unit Fig 3 Step2 Before installing the 9V battery included in the t carrying case remove the plastic covering its inch 2 1 terminals Open the battery compartment by pushing the tab at the bottom of its cover forward Fig 3 Step 1 Lift the cover and set it aside Step 2 Then plug the battery into the wired 9V Battery socket inside the compartment The terminals of Fig 3 The back of the CIH20DL the battery and the socket mate in only one way with the smaller male terminal plugging into the larger female terminal Replace the battery compartment cover and push down on its bottom until it snaps shut The CIH20DL also can be powered by connecting it to an AC outlet or a computer s USB port There is no
13. aterial and workmanship for a period of one year 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 This warranty does not apply to damages that General determines to be from an attempted repair by non 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 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
14. ature of an object from a distance make sure the meter is in normal measurement mode with the primary middle readout tracking air speed or airflow volume and the tertiary lower readout tracking air temperature Then make sure the laser pointer is enabled indicated by the Ad icon at the top of the display It may be necessary to press the 2 button once or twice to enable the pointer With the laser pointer enabled point the top of the meter at an object or surface and press the button The IR thermometer will measure the surface temperature and show it on the secondary upper readout Note that releasing the button turns off the laser pointer and causes the measurement to be held indicated by the return of the HOLD icon above the measurement All IR temperature measurements are automatically held on screen until the button is pressed again or the meter is powered off whichever comes first To improve your surface temperature measurements learn to determine how close to the target the CIH20DL must be so the area whose temperature you wish to measure is within the spot area of the meter s IR thermometer Refer to the Appendix which begins on p 24 for the theory and practice of making accurate IR measurements HOLDING AND STORING MEASUREMENTS To hold any pair of measurements air speed temperature or airflow temperature made by the sensors in the probe head press the button This will freeze the value shown on the primary
15. e mini B type plug of the included USB cable into the jack on the left side of the meter Fig 1 Callout 7 Next insert the A type plug at the other end of the cable into an open USB port of your computer Power on the meter and wait 15 seconds for the hot wire sensor to heat up to operating temperature The first time you connect the meter to your computer the system tray at lower right will pop up two notifications 1 Installing Device Driver Software followed by Prolific USB to serial COMM Port COM X Device Driver Software Installed Successfully Depending on which Windows OS you are running and which USB port you have chosen the X in COMX may be any number from 1 to 9 Write down the number shown in the notification Knowing the number will speed up each subsequent connection of the meter to your computer as long as you use the same USB port each time The interface data logging software is now ready to be used with the CIH20DL Viewing Real Time Measurements on the Dashboard The software installations should have added an Anemometer AP or Anemometer Application icon to your Start button and or desktop and or an IR A icon to the Quick Start left section of the taskbar at the bottom of your computer screen Open the Anemometer AP program via the icon on the Start button desktop or Taskbar Two overlaid screens will appear see Fig 10 The larger bottom screen is called a dashhboard and it serves th
16. e same purpose as the dashboard of a 05 vehicle displaying all important measurements in one Fig 10 The startup Anemometer place The smaller top screen will show a pulldown Application screen menu of COM port selections at right with a default COM port selection of COM4 15 E IR A Application Program General tools vi m Ja x Fig 11 the Anemometer Application s dashboard Date IR TEMP 11 30 2011 1 4 T1 5 Unit Time mez RECORD DATALOG CHART STOP UPLOAD STOP pLoap OPEN m EIE To access the dashboard you must use this pulldown to select the number of the COM port you are using to connect the meter This is the number you were advised to write down earlier If you have forgotten it you can still identify the correct port by trial and error Selecting the correct COM port will illuminate the green STATUS light on the small overlaid screen and make the CONNECT virtual button available to press You may need to refresh the COM Port window until the number of the COM port into which you plugged the USB cable appears Once the STATUS light on the smaller screen illuminates click on CONNECT A successful connection will cause the smaller screen to disappear enabling the dashboard Fig 11 to appear in full and begin mirroring real time readings on the meter s LCD The connection will also cause the word LINK to appear on the bottom line of the meter s LCD WARNI
17. enu Fig 8 The Advanced Settings Menu Normal Measuring mode Air Speed or Airflow Volume mode Air speed unit Airflow volume unit Temperature unit Enter area of grille or register sampling time of data log Clear data logging memory Set current date Set current time Press and hold the MODE SET button for 3 seconds to enter exit menu from to normal measuring mode Press the W or A button to select CMM CFM for Airflow Volume mode or m s ft min km h mile h knots for Air Speed mode When your choice flashes press the MODE SET button to store it Press the V or A button to select m s ft min km h mile h or knots When your choice flashes press the MODE SET button to store it Press the W or A button to select CMM or CFM When your choice flashes press the MODE SET button to store it Press the W or button to select F or C When your choice flashes press the MODE SET button to store it Press and hold if convenient the W or A button to adjust the value on the primary readout to the measured area The area can be adjusted from 0 01 to 322 92 ft in increments of 0 01 ft or from 0 001 to 30m in increments of 0 001 m2 After entering the correct area press the MODE SET button to store it Use the 55 button to toggle between the minutes and seconds fields of the time shown on the secondary readout Use the W and A buttons holding them if convenient to adjust the flashing value within each field T
18. er of two kinds of plugs one with American style blades and the other with European style round prongs One plug of each type is included in the case A 9V Alkaline battery e A plastic bag containing 1 a CD with Windows compatible software and drivers for using the CIH20DL with a PC running Windows 32 or 64 bit Windows Vista or Windows XP 2 a Certificate of Traceable Calibration and 3 this user s manual PRODUCT OVERVIEW Fig 1 shows the labels and positions of the controls and connectors on the front and top of the CIH20DL Fig 2 shows all possible indications on the LCD Familiarize yourself with the controls functions and the meanings of the display indications before moving on to the setup Instructions 1 D Power button 2 LCD with three readouts 3 Record button When pressed briefly stores values shown on all three readouts in one of nine nonvolatile memory locations and then advances the location counter by one When pressed and held for 3 seconds begins logging measurement data air speed or airflow volume air temperature and IR temperature at preset sampling time Logs are stored in the meter s internal memory space as opposed to in nonvolatile memory Also used to change fields when setting sampling time date or time and to clear the meter s internal data logging memory space 4 button Activates laser pointer when enabled unless readouts are displaying recalled values V button A
19. er starting at the time the meter was connected to your computer and ending at the present time Also note from the table that Record data is captured as often as several times per second some hour minute second time stamps have up to three entries while others have none or one Viewing Record Data Graphically You can also view Record data by using the dashboard s integrated chart function With the meter connected to your computer indicated by a green light at the upper left of the dashboard and the word LINK on the bottom line of the meter s LCD click on the OPEN virtual button under CHART at the bottom of the dashboard A screen similar to Fig 12 will appear on your computer s display Note that only two parameters air velocity and air temperature are plotted because they are the only values that the meter captures automatically when powered on and operating unattended in Data Logging mode The IR temperature data contained in the tables generated by uploaded txt xlsx Data Record files are not plotted The dashboard s chart function is useful for quickly viewing trends in ambient air speed and temperature values captured by the probe since the meter was last powered on Unlike Record data the data in plots generated by the dashboard s chart function are not and cannot be given absolute date and time stamps You can however make this plotted data easier to correlate with tables of uploaded Record data by changing the
20. ery discharges To switch to AC power attach the correct type of plug for your locale American style blades or European style round prongs to the socket of the supplied power cable The top of each plug has square corners Push the lip on the plug s top edge at an angle into the slot in the top of the socket s cavity marked by an arrow Then push the bottom of the plug down and into the cavity until the spring loaded latch secures it Finally insert the mini B type plug end of the power cable into the USB jack on the side of the meter Fig 1 Callout 7 and plug the other end into an AC outlet To begin logging data extend and secure the probe as the application dictates and then press and hold the REC button for at least 3 seconds This will cause the phrase DATA LOG to appear on the bottom of the meter s LCD To stop logging data press and hold the REC button again This will cause the DATA LOG indication to disappear Once the meter exits Data Logging mode it will automatically power off in 30 minutes assuming you plugged it into an AC outlet for the logging session as recommended earlier Finally disconnect the cable applying AC power from both the meter and the AC outlet Using the instructions above as a guide reconfigure the power cable as a USB cable by detaching the power plug from the socket at the cable s mini A plug end 17 Be aware that after you reconfigure the power cable as a USB cable and before you connect the mete
21. f I accept the License Agreement and then click Next 5 On the next dialog box the License Agreement again left click the circle to the left of accept the License Agreement and then left click Next 6 On the next dialog box Start Installation click Next On some computers the two software installations may take as long as 20 minutes 7 When the next dialog box Installation Complete notifies you that The installer has finished updating your system click Next 8 he next dialog box prepares for installation of the PL 2303 USB to Serial driver on your computer Click Next to continue 9 When the next dialog box InstallShield Wizard Complete appears click Finish 10 You may or may not be prompted now to restart your computer to complete installation of the Anemometer Application If you are prompted to do so click Restart Whether or not you restart note that an Anemometer Application icon has been added to your desktop start button or both locations To facilitate access to the program right click on whichever icon has been added and pin it to both locations and your taskbar You can now eject the installation disc and store it with your other important software Connecting the Meter to Your Computer Before using the CIH20DL to log data familiarize yourself with how the meter and the software you have just installed work together To begin connect the meter to your computer by plugging th
22. he larger window in the probe head containing the hot wire If some of the airflow goes around the cavity the hot wire will not be cooled to the maximum extent and air speed and airflow volume measurements will consequently be low To ensure that the hot wire is perpendicular to the airflow slowly twirl the probe while watching the primary middle readout When the highest values are seen the hot wire is fully perpendicular to the flow of air Fig 5 The initial display after powering on MEASURING AIRFLOW VOLUME To prepare to measure the amount of air exiting a duct grille or register first measure its area Then skip ahead to Using the Advanced Settings Menu beginning on p 12 Following the instructions in Fig 8 use the MODE SET button and the W and A buttons to 1 place the meter in airflow volume measurement mode and 2 enter the area of the duct grille or register Once you have measured and entered the area fully extend the telescoping hot wire probe and position the head of the probe Fig 6 How to orient the in the airstream Make sure the hot wire window is hot wire probe perpendicular to the airstream as when measuring air speed The primary middle readout will show the airflow volume in the default unit of CFM cubic feet minute and the tertiary bottom readout will show the temperature of the airstream in F MEASURING SURFACE TEMPERATURE To use the meter s IR thermometer to measure the surface temper
23. he sampling time can be set to any value between 5 seconds 00 00 05 and 59 minutes 59 seconds 00 59 59 After entering the desired sampling time press the MODE SET button to store it Press the button to clear the meter s internal data logging memory Doing so resets the five digit Memory Space counter and causes it and the text CLR Memory above it to flash confirming the erasure After six seconds the meter will automatically exit the Advanced Settings Menu and enter normal measuring mode Use the J button to toggle between the year month and day fields the date shown on the secondary readout Use the W and A buttons holding them if convenient to adjust the flashing value within each field After entering the current date press the MODE SET button to store it Use the button to toggle between the hours minutes and seconds fields of the time shown on the secondary readout Use the W and A buttons holding them if convenient to adjust the flashing value within each field Remember to use the 24 hour format when setting the hour After entering the current time press the MODE SET button to store it DATA LOGGING WITH A COMPUTER In addition to making and displaying real time air speed airflow volume and temperature measurements and storing up to nine sets of these readings in nonvolatile memory the CIH20DL also can make and time stamp up to 20 000 measurements over extended periods of time at user selected sampli
24. ime Measurements on the Dashboard 15 17 Using the Meter to Log Data 17 18 Uploading Record Data 18 Viewing Record Data Graphically 19 20 Uploading and Viewing Data Logs 20 21 SUCCHIGANONS cen RUD e E RC 22 MAINTENANCE Y CR 23 Warranty Information nn n eee n nnn 23 Return for Repair Policy nm n 23 ABDOUUIE 24 25 INTRODUCTION Thank you for purchasing General Tools amp Instruments CIH20DL Data Logging Hot Wire Anemometer with CFM CMM and 8 1 IR Thermometer Please read this user s manual carefully and thoroughly before using the instrument The CIH20DL is a professional grade handheld hot wire anemometer that can not only measure the speed of air exiting the grille or register of an HVAC R system or blower or fan but also convert those readings to airflow volume measurements in units of CFM cubic feet per minute or ft min or CMM cubic meters per minute or m min The conversions are possible because the meter allows the user to enter the free area dimensions of grilles and output ductwork The instrument can also measure the temperature of cooling or heating air as well as surface temperatures Air temperatures from 32 to 158 F 0 to 70 C are measured by a thermistor located
25. nemometer HOLD button 2 Freezes air speed and airflow volume readings only AC power USB cable jack on left side 4 A two function button Laser pointer enable disable and backlight on off Pressing button four times cycles through the four possible combinations of states See figure below After the backlight is activated it stays on for 15 seconds and then automatically shuts off Cl DAAH Fig 1 The CIH20DL s controls and 12 connectors Backlight OFF Laser Disabled Backlight ON Backlight OFF Backlight ON Laser Disabled Laser Disabled Laser Disabled 9 MODE SET button When pressed briefly and repeatedly cycles readouts to show real time measurements maximum minimum and average readings and recalled stored measurements When pressed and held for 3 seconds unless readouts are displaying recalled values places meter in advanced setup mode In this mode the user can change default measurement units enter a grille area set the data logging sampling time and the current date and time and clear the meter s data logging memory space 10 A button 11 Hot wire probe socket 12 IR measuring window 13 Laser pointer port 14 Hot wire probe head 15 Hot wire probe plug 6 OZzErL X CL cIcoOmnmmoo scz oo0000 5 h m s HOLD iiis d nooo LL LLLULLM SS AVG 1 7 DA
26. next to the hot wire sensor at the end of a 6 ft 1 8m long telescoping metal probe and cable Surface temperatures from 25 to 999 F 32 to 538 C are measured by an integral infrared IR thermometer with a distance to spot D S ratio of 8 1 A hot wire anemometer measures air speed in the following way When the instrument is powered on direct current is passed through its hot wire sensor for about 15 seconds After the sensor has been warmed to a constant temperature the instrument detects how much current is required to maintain that temperature as wind passing across the sensor acts to cool it The amount of current required is directly proportional to the square of the wind speed Hot wire anemometers are as accurate as vane anemometers but hot wire units are better able to measure very slow air currents because they have no moving parts and therefore no inertia For example the CIH20DL can measure air speeds as low as 2 ft min A typical vane anemometer of comparable quality and accuracy cannot measure air speeds lower than 80 ft min The CIH20DL has a large backlit display with three readouts one shows air speed or airflow volume another is for IR temperature and the third is dedicated to air temperature Normally each of these readouts shows real time measurements which can be held frozen and read later to enable work in dark areas End users can opt to have the readouts show maximum minimum or average measurements instead
27. ng rates These measurements called data logs are stored in a separate internal memory They can be uploaded to a PC using the USB cable and interface driver data logging software provided with the instrument After uploading the data logs can be analyzed for trends and anomalies using the software s presentation options Examples include graphical and tabular displays of data that make it easy to spot excursions of air temperature or gradual decreases in airflow volume over time Install Software and Drivers 1 Place the installation disc shiny side down in your computer s CD DVD A drive and close the drawer anda 2 Double click the icon Run setup exe or the icon representing the disc to pepe tee eter ea initiate AutoPlay The screen shown in Fig 9 will appear i i EE E 3 Click Next to install the anemometer s enn application program Anemometer Directory for National Instruments products Version 3 in your C Program Files e x86 folder in a new subfolder named lt ST 3X gt If you want to install the software elsewhere click Browse and choose another location Doing so will Fig 9 The initial software installation also install software for other National screen Instruments products in another new Program Files subfolder named lt National Instruments gt 4 On the next dialog box the National Instruments Software License Agreement click the circle to the left o
28. o will give the data you log an absolute temporal reference point making it more credible and valuable The Advanced Settings Menu also allows you to use air speed and temperature units other than the default m s and F respectively Finally and most important the Advanced Settings Menu enables you to determine the optimum value of sampling time for the purposes of your application Using the shortest setting of 5 seconds may result in too much essentially identical data being stored in memory potentially limiting its capacity to capture important events such as an unexpected excursion of temperature or humidity Conversely using the longest sampling time setting of 59 minutes 59 seconds will likely cause important events to go undetected If you are an experienced data logger you already know how to choose the optimum sampling time for your application If you are a novice pick a sampling time closer to the minimum than the maximum sampling time on the assumption that the meter probably has enough memory 20 000 sets of readings to store all the data you ask the meter to log unless you use it to log data for months rather than weeks or days Because most data logging is done over a long period of time General recommends that you change the meter s power supply from its 9V battery to an external source of AC power before beginning a logging session Running on AC power enables the meter to log data indefinitely not just until the batt
29. ost recent session To clear the data logging memory in the CIH20DL follow the instruments for the Clear Data Logging Memory box of the flowchart Fig 8 on p 13 Instructions for optimizing the graphical presentation of data logs are beyond the scope of this manual Using Excel rather than Notepad or WordPad to open data log files offers the most options for viewing flexibility 21 SPECIFICATIONS Air Speed Measurement Range Air Speed Measurement Basic Accuracy Air Speed Measurement Resolution Airflow Volume Measurement Range Airflow Volume Measurement Basic Accuracy Airflow Volume Measurement Resolution Air Temperature Measurement Range Air Temperature Measurement Basic Accuracy Air Temperature Measurement Resolution IR Surface Temperature Measurement Range IR Temperature Measurement Accuracy IR Temperature Measurement Resolution IR Thermometer Emissivity IR Thermometer Distance to Spot Ratio Airflow Register Area Range Sampling Time Range Internal Measurement Storage Capacity Internal Data Log Storage Capacity Auto Power Off Backlight Duration Display Size Operating Temperature Storage Temperature Dimensions of Instrument Weight of Instrument Extended Length of Telescoping Probe and Cable Power Source Dimensions of Protective Carrying Case Weight of Instrument Accessories and Case 22 2 ft min to 7874 ft min 20 mm sec to 40 m sec 3 of reading 0 1 ft min 0 01 m s 0 01 km h 0 01 mph
30. plots x axis label via the dashboard To do so right click on any of the three icons in the graph palette below the m s and F buttons shown in Fig 12 Using the pulldown menu select Visible Items and left click Scale Legend to put a check mark to its left You can also change the units of the air speed and temperature plots by clicking their red virtual buttons As an example compare Fig 13 to Fig 12 On Fig 13 the scale legend has been changed from Numbers to Sample No and the unit of air speed measurement has been changed from m s to ft min IR A Application Program General tools vi activated from the dashboard IR A Application Program General tools vi Numbers 13 A modified CHART display Fig 12 The initial CHART display 19 Other selections in the pulldown menus that appear when you right click on any of the three icons of the graph palette can be used to e Make other chart items visible e Auto scale plots along their X and Y axes e Export images e Copy data e Change the way that plots are updated e Add descriptions and tips to charts It is also possible to left click on two of the three icons of the graph palette Doing so enables you to manipulate Record data plots using two powerful techniques zooming and panning e f yo
31. power on the meter press the button The display will initially show the clock icon at upper left and numbers on the primary readout counting down from 15 The numbers track the time needed to heat the hot wire to prepare it for use After 15 seconds the meter will be ready for use It will automatically enter normal air speed or airflow volume temperature measurement mode and display a screen similar to Fig 5 By default the primary middle readout shows real time air speed in ft min and the tertiary lower readout shows real time air temperature in degrees Fahrenheit The secondary upper display also uses F as its default unit To change the default air speed or temperature unit skip AE ahead to Using the Advanced Settings Menu beginning on p 12 Wh 1 11 21 MEASURING AIR SPEED AND TEMPERATURE To measure the speed and temperature of a blower s or HVAC system s output fully extend the telescoping hot wire C B ft min probe and position the head of the probe in the airstream leaving the system s duct or register Be sure the black arrow on the round WI black plastic end piece points in or opposite to the direction of air LI 1 flow see Fig 6 The primary middle readout will show the air speed in ft min and the tertiary bottom readout will show the temperature of the airstream in F When making air speed or airflow volume measurements it s important to make sure the air flows directly through t
32. r to your computer the meter will automatically resume drawing power from its internal battery The switch will re enable the Auto Power Off function which will then automatically power the meter off if no buttons on it are pushed within any 10 minute interval When you connect the meter to your computer via the USB cable for the purpose of uploading data the subject of the next section the meter will begin drawing power from the computer s USB port The connection will disable the Auto Power Off function to prevent unexpected interruptions of data transfers between the meter and your computer Uploading Record Data At any time after ending a data logging session connect the meter to your computer by inserting the mini B plug at one end of the cable into the jack on the side of the meter and the mini A plug at the other end into an open USB port of your computer Power on the meter and open the Anemometer AP program Once the meter is connected to your computer you can upload two different kinds of data to the PC The first kind Record data comprises sets of three parameters air velocity air temperature and IR temperature whose newest values represent real time measurements and which stretch backward in time from the present The data is rolled over oldest values are overwritten to make room for newer values continuously Record data is analogous to video data that a digital video recorder DVR records continuously as long as it
33. reason to do so unless you plan to use the meter for extended data logging sessions Connecting the meter to an external power supply does not charge the included QV Alkaline battery which is not rechargeable see Data Logging with a Computer beginning on p 14 for ways to connect the CIH20DL to an external power source OPERATING INSTRUCTIONS GETTING STARTED To prepare the CIH20DL for use line up the hot wire Ready For Use Not in Use probe plug Fig 1 Callout 15 with the hot wire probe r socket on the top of the meter Callout 11 so the black arrow on the probe connector faces the back of the meter Then insert the probe plug into the socket Before extending the telescoping probe extract the probe head Callout 14 from the probe body by grasping the round black plastic end piece Fig 4 left top callout with two fingers and pulling slowly Take care not to touch either the hot wire air speed sensor or the air temperature sensor within the head both are extremely delicate Pull out the probe head to expose 1 inch of probe body Exposing the probe head now will allow you to telescope the probe to any length later by grasping its body rather than its delicate head Following each measurement session carefully push the probe head back into the probe body Fig 4 right in order to protect the sensors Hot wire air speed sensor Air temperature sensor V xej Fig 4 The probe head assembly To
34. rn green and slowly grow longer to the right When the bar stops growing click on UPLOAD As was the case for Record data you will then be prompted to choose a storage location for this txt xlsx DataLog file Add the date as a suffix to the generic DataLog file name and store the file on your computer s desktop Once you have done so click the OK button of the dialog box Locate the file on your desktop double click on its icon and open the file in Microsoft Excel Microsoft Notepad or Microsoft WordPad As before depending on the version of Excel you are using you may be prompted to verify the integrity of the file by clicking Yes prior to opening it 20 Note the tabular format of the data as well as the column headings and the time stamps the third column in Notepad and WordPad and Column C in Excel Like Record data Data Logs comprise three sets of readings IR Temperature Air Velocity and Air Temperature that are expressed in default units and displayed in chronological order Unlike Record data the time stamps of Data Logs begin when you started data logging and stop when you stopped logging Also unlike Record data Data Log data points are captured at the sampling rate you selected or the previous default sampling rate if you chose not to select a new rate before beginning a data logging session Finally note that when you upload data logs all logs in the instrument s memory are uploaded not just the logs of your m
35. ter 10 minutes of inactivity to extend battery life When running on AC power the auto power off period is extended to 30 minutes when the meter is not in data logging mode When the meter is running on AC power in data logging mode the auto power off function is disabled to enable logging sessions longer than 30 minutes When the meter is connected to a computer via the included USB cable the meter is powered through the computer s USB port In this mode the Auto Power Off function is disabled This prevents unexpected meter shutoffs from interrupting data uploads KEY FEATURES e Measures and displays air speed or airflow volume in several Imperial or metric units e Simultaneously measures and displays ambient temperature from 32 to 158 F 0 to 70 C in F or C with 2 accuracy e Measures air speeds from 2 ft min to 7874 ft min 20 mm sec to 40 m sec with 3 accuracy e Measures airflow volumes from 0 to 2 5 million CFM 0 to 72 000 CMM with 3 accuracy e Displays maximum minimum or maximum air speed plus temperature e Also has 8 1 infrared thermometer for remote non contact measurement of surface temperatures from 25 to 999 F 32 to 538 C with 3 accuracy e Telescoping probe and cable extend reach of hot wire sensor and thermistor to up to 6 ft 1 8m e Jumbo backlit LCD with three readouts e Stores recalls up to nine sets of three readings in nonvolatile memory e Time stamps and saves up to 20 000 data points
36. the word DATA and a number from 1 to 9 at the lower left of the display The word RECALL appears at the right of the number to indicate that the three readouts are showing stored values 11 To retrieve other triple sets of measurements in either order newest to oldest or oldest to newest use the W and A buttons respectively For example if the first set of values retrieved the most recently stored is tagged DATA2 pressing the W button would retrieve the values stored in memory location DATA1 These represent the next oldest measurements compared to DATA2 To continue retrieving data using a reverse timeline newest to oldest continue to press the W button To retrieve measurement data using a forward timeline oldest to newest use the A button Whichever timeline you choose when you reach memory location DATAO either by moving up from DATA9 or down from DATA1 the display will change radically DATAO RECALL will appear on the bottom line and all three readouts will show dashes instead of measurement values and units That s because DATAO is a non storing memory location In addition the letters CL and CLE will be superimposed on the dashes of the secondary and primary readouts Also the words Memory Space CLR Memory will appear in the space between CL and CLE This unique display gives you the opportunity to bulk erase the meter s nonvolatile memory To do so press the button This will cause the entire primary readout the le
37. tters CLE superimposed on dashes to flash continuously indicating that all stored measurements have been erased To confirm the erasure repeatedly press either the W or A button and note that all DATA X RECALL displays now show three readouts with dashes rather than measurement values To return the meter to normal measurement mode after bulk erasing the nonvolatile memory press the MODE SET button USING THE ADVANCED SETTINGS MENU Pressing and holding the MODE SET button for 3 seconds opens up the meter s second multi option menu the Advanced Settings Menu Figure 8 is a flowchart of the options made available from this menu by subsequent brief presses of the MODE SET button Once you have entered the Advanced Settings Menu indicated by the word SET on the bottom line of the display moving to the next box down the flowchart requires only a brief press of the MODE SET button Pressing and holding the MODE SET button exits the Advanced Settings Menu and returns the meter to operating in normal measurement mode Unlike the first virtual menu accessible from the MODE SET button the Advanced Settings Menu gives you only six seconds to choose an option at each decision box moving down the flowchart If no button is pushed within six seconds the menu closes and the meter resumes operating in normal measurement mode Once you gain experience using the meter you will find that six seconds is sufficient to exercise any option presented by the m
38. u left click on the center icon of the graph palette the Zoom button six display options will appear for selection Clicking on the icon in the middle of the bottom row turns the left button of your computer s mouse touch pad or trackball into a zoom lens through which you can greatly increase the resolution of the data in plots of air velocity and air temperature vs time e Left clicking on the right icon of the graph palette turns your mouse touch pad or trackball into a panning control Doing so changes the icon of your cursor into a hand When placed within a plot area moving the hand left or right shifts the time axis forward or backward The remaining two sets of three interactive icons on the dashboard are located at the bottom left below the plots The icon at left a lock is called the Scale Lock button Left click it to toggle in and out of autoscaling for each plot To the right of the Scale Lock button are two icons called Scale Format buttons that you can right click to configure the format precision and mapping mode of plotted data set the visibility of the scale and scale label and change the grid and plot colors Uploading and Viewing Data Logs To upload your data logs click on the STOP UPLOAD virtual button under DATALOG at the bottom of the dashboard When you do so the button label will change to UPLOAD and the orange segment of the progress bar running horizontally across the middle of the dashboard will tu
Download Pdf Manuals
Related Search