HT20 - Manual - General Tools And Instruments
Contents
1. Display Temperature Response Time 3 1 2 digit LCD with 60 second auto power off 0 5 seconds Humidity Response Time Interface 5 seconds USB 1 0 2 0 Length of USB Extension Cable Dimensions 7 9 in 200mm 4 96 x 1 10 x 2 01 in 126 x 28 x 51 mm Weight Power Source lt 7 02 2009 3 6V non rechargeable 1 2 AA 1200mAh Lithium ion battery Current Consumption lt 0 2mA Battery Life typical 1 year 18 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 19 MAINTENANCE TIPS Avoid dropping the unit Do not subject it to violent shock or vibration or expose it to strong electromagnetic fields for example near arc welders or induction heaters e Keep the unit out of direct sunlight e Do not use chemicals or abrasive cloth to clean the display window or housing Before storing the HT20 for an extended period of time several months or more remove the battery to avoid having it leak and damage the unit WARRANTY INFORMATION General Tools amp Instruments General s HT20 USB RH Temperature Data Logger with LCD Display is warranted to the original purchaser to be free from defects in material 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 to2. 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 HT20 User s Manual Specifications subject to change without notice 2011 GENERAL TOOLS amp INSTRUMENTS NOTICE WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS MAN HT20 3 16 12 oe
3. be from an attempted repair by non authorized personnel or misuse alterations normal wear and tear or accidental damage including dropping the unit 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 19 9 HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 20 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 G Specialty Tools i Instruments GENERAL TOOLS amp INSTRUMENTS 80 White Street
4. continue 11 The next window to appear is a Windows Security window Click on Install this driver software anyway to continue 12 The next Device Driver Installation Wizard window will advise you that an HT10 20 50 driver from General Tools or Kecheng Laboratories was successfully installed and that your device is now Ready to use Click Finish to continue HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 10 CONFIGURE THE UNIT Note that the software installation has added a EM icon to your desktop To facilitate access to the program right click on the icon and pin it to both your Start button and the Quick Start area at the left of your taskbar You can now eject the installation mini disc and store it with your other important software Plug the HT20 into an available USB port of your computer If your computer is a laptop and the only available USB jack does not have enough vertical clearance to accommodate the HT20 without mechanically stressing its USB plug do not plug the HT20 directly into the jack You do not want the plug of the HT20 to support any of the weight of the laptop If that is the case plug the HT20 into the jack of the included USB extension cable and insert the plug of the extension cable into the computer s USB jack The first time you plug the HT20 into your computer your system tray will notify you that the computer is Installing Device Driver Software When the notification disapp
5. of the entire curve in a shaded box at upper left e The dates and times shown on the x axis scale and in the upper left corner are in sync with your computer s clock To print the txt file of any data log click the Print virtual button e To open a previously saved data log click the Open button This function is also available as the View previously saved data option shown in Fig 2 e To export a file to Excel for advanced trending and analysis click the Export to Excel button OTHER INDICATIONS As mentioned earlier the MODE button and the LCD can be used together to display real time temperature and humidity measurements and to indicate the current working status of the HT20 Circuitry inside the HT20 automatically shuts down the LCD to conserve battery life if the MODE button has not been 16 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 17 pressed within the past 60 seconds That is the case even when the unit is logging data In other words the LCD is normally asleep To wake up the LCD briefly press the MODE button This first press of the button will cause the LCD to resume displaying the same indication that was on screen when the LCD was last put to sleep There are four possible display indications 1 current temperature in Celsius 2 current temperature in Fahrenheit 3 current relative humidity in 9o and 4 current working status Each press of the MODE butt
6. HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 1 USB RH TEMPERATURE DATA LOGGER with LCD DISPLAY USER S MANUAL HT20 Please read this manual carefully and thoroughly before using this product HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 2 TABLE OF CONTENTS Introduction 0 6 cece eee ees 3 4 Key Features ess aces deut ee e ceu eine ae 4 5 Safety Instruction 0 0 0 0 ccc ccc eee eee ees 5 What s in the Blister Pack 0 00 c ccc eeeeaee 5 Product OvervieW 000s cece eee eens 6 7 Setup Instructions llli 7 12 Installing Replacing the Battery 7 8 Install Software and Drivers 8 9 Configure the Unit 0008 10 13 Operating Instructions 000e eee 13 17 Deploy the Unit 00000 eee 13 14 Stop Logging and Import Logs 14 15 Viewing Printing and Exporting Data Logs 15 16 Other Indications 0 0 e eee 16 17 Specifications cere EE eee ow ECHO Oe 18 Maintenance TipS 000 ccc eee eee eee eee 19 Warranty Information 0000s cece eens 19 Return for Repair Policy llle 20 2 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 3 INTRODUCTION Thank you for purchasing General Tools amp Instruments HT20 USB RH Temperature Data Logger with LCD Display Please read this user s manual carefully and thoroughly before using the inst
7. aying it on a horizontal surface or by hanging it vertically within the included plastic mounting bracket The back of the bracket features both a magnet and a hanger hole Once you have deployed the HT20 you can initiate data logging To start data logging press and hold the MODE button for at least 3 seconds The LCD will display the word LOG to confirm that logging has begun STOP LOGGING AND IMPORT LOGS To stop data logging press and hold the MODE button for at least 3 seconds The LCD will display three dashes to confirm that logging has stopped That is how you should stop data logging if you plan to initiate another logging session later without uploading logged data to your computer in the interim If you allow logging to continue and you do not upload your data to your computer soon you risk filling up the HT20 s memory A simpler and safer way to stop data logging is to plug the HT20 into your computer s USB port immediately after completing a logging session and then use the ELUSB software to stop logging Each time you plug the HT20 into the USB port the window shown in Fig 2 will appear When you plug in the unit it makes no difference whether it is still logging the procedure 14 9 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 15 for uploading importing data logs is identical Just click on the middle selection Stop the USB Data Logger and download data to instantly execu
8. e unit degrees Fahrenheit or Celsius F or C High and low temperature alarm setpoints High and low humidity alarm setpoints To begin click on Set up the USB Data Logger in the window shown in the figure above Doing so will cause the following window to appear eoo EL USB v1 0 beta TempScae SampleRate Temp High Alarm P 128T Temp Low Alarm ia 63F Hum High Alarm Q 84 Hum Low Alarm f 32 IRT High Temp Alarm IRT Low Temp Alarm 13 EI Cancel Device HT20 is connected Fig 3 The HT20 configuration Setup window Using your mouse trackball or touchpad first choose your Temp Scale and Sample Rate sampling time With regard to sampling time using the shortest setting of 10 seconds may result in too much essentially identical data being stored in 12 oe HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 13 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 12 hours 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 sampling time than the maximum on the assumption that the HT20 probably has enough memory 8000 pairs of humidity and te
9. ears open the ELUSB program by selecting it via your Start button clicking on its icon on your taskbar or double clicking its desktop icon If the software has installed correctly and you have plugged the HT20 into a working USB port of your computer the following screen should appear on your computer s display 10 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 11 EL USB v1 0 beta e Set up the USB Data Logger Rp Stop the USB Data Logger and download data FE View previously saved data i Device HT20 is connected Fig 2 The three options made available by plugging the HT20 into a USB port Note If you have already used your HT20 to log data and it is still in recording mode plugging the unit in will cause the following window to appear Warning The device is logging data choose YES to download data first NO to continue anyway BUT you will lost previous data CANCEL to return Click Yes to stop recording and import all data recorded to that point in time Click No to continue to Setup without importing recorded data meaning it will be lost Click Cancel to go back and unplug the unit from the USB port HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 12 You can now use the software to configure your HT20 Configuring the device means choosing four key parameters e Sampling time How often it makes and stores humidity and temperature measurements Temperatur
10. folder containing a PDF of the HT20 user s manual as well as PDFs of the manuals for the HT10 and HT50 versions of the HT20 without an LCD and with an IR thermometer Copy the HT20 manual to your computer s hard drive for permanent storage The other file is a Windows Installer Package msi file named ELUSB V1 0 Double click its Ed icon 4 A window titled Welcome to the ELUsb Setup Wizard will appear Click Next to continue 5 Within the window that appears next click the box next to accept the terms in the License Agreement Then click Next to continue HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 9 6 The next window advises that the ELUSB application will be installed in your computer s C Program Files folder in a new subfolder named lt ELUSB gt If you want to install the software elsewhere click Browse and choose another location After selecting either the default location or another location click Next to continue 7 When the Ready to install ELUsb window appears click Install to continue 8 Before the installation begins a User Account Control window may appear and ask Do you want to allow ELUSB V1 0 msi to make changes to this computer Click Yes to continue 9 The ELUsb Setup Wizard will now install the program on your computer On the next window that appears click Finish 10 At the bottom of the Device Driver Installation Wizard that appears next click Next to
11. mperature 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 If you wish you can also drag the sliders shown in the figure to set high and low alarm setpoints for temperature and humidity Once you have chosen your data logging parameters click Setup A window will appear advising that The device is set up successfully Clicking Setup also synchronizes the HT20 s internal clock with your computer s clock giving all data logs to be captured an absolute time reference You can now unplug the HT20 from your computer s USB port The unit is in standby mode ready to begin logging data OPERATING INSTRUCTIONS DEPLOY THE UNIT The HT20 is particularly easy to deploy on a job site because the unit does not need to be plugged into a computer to be activated ready to start logging data Working together the MODE button and the LCD serve as the control and indicators needed to 1 start and stop data logging and 2 verify and change the unit s working status 18 oe HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 14 That leaves only two things to be sure of when choosing a place to deploy the HT20 e The temperature and humidity sensor window Fig 1a Callout A is not covered e The humidity and temperature values at the unit s location are representative of the room The HT20 with its protective cap on can be deployed either by l
12. ntrol The HT20 enables simplifies and cuts the cost of environmental monitoring of office buildings greenhouses food and equipment storage facilities wineries freezers shipping containers HVAC R installations computer rooms labs libraries museums and saunas e Electronics manufacturing Alerts provided by the low humidity alarm function of the HT20 can mitigate the risk of damaging high voltage static discharges KEY FEATURES One button starts stops data logging without a PC e Plug and play USB 2 0 interface no need for cables cradles or docks Large storage capacity Up to 8000 pairs of humidity and temperature readings e 3 1 2 digit LCD displays real time temperature and humidity readings also indicates device working status and memory full e Included software is used to set Sampling time from 10 seconds to 12 hours Hi Lo alarm setpoints for humidity and temperature Temperature unit F or C e Software also calculates dew point and displays data logs as time based graphs synchronized to your PC s clock 9 HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 5 One click exporting of logs to Excel or Word e Long battery life up to one year e Includes USB extension cable One year warranty SAFETY INSTRUCTION Do not use the HT20 in the presence of flammable or explosive gases WHAT S IN THE BLISTER PACK The HT20 comes in a blister pack that also contains e One 1 2 AA batte
13. on changes the display to the next indication in the sequence pressing the MODE button when the LCD is displaying the unit s current working status 4 resets the cycle to 1 There are four possible working status indications e LOG The unit is currently logging data e The unit is in standby mode ready to log data e FUL The unit s internal memory is full and logging has been stopped e CON The unit needs to be configured by software When the LCD is displaying a temperature or humidity reading it also gives an indication if the reading is outside the acceptable range of readings for that parameter assuming that high and or low alarm setpoints were entered during the Setup procedure If an up arrow appears at the left of the reading see Fig 1b on p 7 the measured value of that parameter is higher than its high alarm setpoint If a down arrow appears at the left of the reading it is lower than the low alarm setpoint for that parameter 17 9 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 18 SPECIFICATIONS Temperature Measurement Range 4 to 158 F 20 to 70 C Temperature Measurement Accuracy 0 7 F 0 4 C Temperature Measurement 0 2 F 0 1 C Resolution and Repeatability Relative Humidity RH 10 to 90 Measurement Range RH Measurement Accuracy 3 RH Measurement Resolution 0 1 and Repeatability Internal Storage Capacity 8 000 pairs of RH Temp readings
14. rument The HT20 is a low cost compact battery powered thermo hygrometer capable of unattended logging recording of the ambient temperature and relative humidity RH of an environment for days weeks or months Data logging can be started or stopped by pushing a button on the unit eliminating the need to bring a laptop to the job site After a data log has been captured and stored it can be uploaded as a txt file to any PC running the Windows 7 or Windows XP operating system after plugging the HT20 into one of the computer s USB ports The HT20 s internal flash memory is large enough to store up to 8000 pairs of humidity and temperature readings Included with the product which is slightly larger than a thumb drive is a mini disc with the drivers needed to interface the unit to the computer as well as software that can display a data log file as a table or graph and or export it to Microsoft Excel Exporting to Excel is recommended for sophisticated trending and analysis of humidity and temperature data and easy detection of unexpected excursions Windows 7 and Windows XP are registered trademarks of Microsoft Corporation 9 HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 4 Applications for the HT20 include e Water damage restoration Because the HT20 is designed to be deployed and left in place over the duration of the job it is always in equilibrium with the environment e Process co
15. ry e A disc with software drivers for Windows7 or Windows XP computers a program for capturing data logs and displaying them as curves and a PDF of this user s manual e A USB extension cable e A hard copy of this user s manual inside the fold over card HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 6 PRODUCT OVERVIEW Fig 1a below shows the main components controls and connectors of the HT20 Fig 1b on the facing page shows all possible indications on the HT20 s display Familiarize yourself with their names and functions before moving on to the Setup Instructions Fig 1a The components controls and connector of the HT20 A Temperature and humidity sensor window B Battery compartment latch is on rear of unit C 3 1 2 digit LCD displays temperature and humidity readings also indicates device working status and memory full D USB plug E Protective cap F MODE button HT20 Manua FINAL REV 0316121 yh 3 16 12 4 02 PM Page 7 E UE m UML cop s on the HT20 Display Legend A indicates reading is higher than high alarm setpoint for that parameter V indicates reading is lower than low alarm setpoint for that parameter RH relative humidity unit C Celsius temperature unit F Fahrenheit temperature unit 188 8 Humidity or temperture value or one of the following four working status indications LOG Unit is logging data Unit is in standby mode ready to log data FUL In
16. te both functions The data will be imported as a txt file A Save As window will appear asking you to identify where you want the file to be stored and what you want to name it VIEWING PRINTING AND EXPORTING DATA LOGS Immediately after you close the Save As window by clicking on Save the uploaded data log will automatically be displayed as a set of curves representing all loggable values Fig 4 is a typical example The initial display includes all parameters including dew point which the software automatically calculates and alarm setpoints that you may have entered during Setup To remove any parameter or horizontal and vertical grid lines from the overall plot uncheck its box at right eoo EL USB v1 0 beta CurveViewer Fig 4 A typical initial plot of an imported data log 15 9 HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 16 There are several features shown in Fig 4 worth noting e To mark the position of every recorded data point on the curve check the Mark Points box at the top of the sidebar at right To get a higher resolution view of the data recorded during a specific period of time scale up and down the curves by dragging the slider at the bottom of the window left and right e Hovering the cursor over a particular point of the curve displays all data related to this point including the maximum minimum and average values
17. ternal memory is full and logging has been stopped CON Unit needs to be configured by software SETUP INSTRUCTIONS INSTALLING REPLACING THE BATTERY LATCH The HT20 uses a 3 6VDC 1 2 AA Lithium ion battery To open the battery compartment use a paper clip or a screwdriver with a fine point to push in the silver flange showing through the small square hole in the rear of the unit T HT20 ManuaF FINAL REV 0316121 yh 3 16 12 4 02 PM Page 8 left photo on previous page Push back the cover middle photo remove the old battery right photo and insert a fresh battery in the correct orientation Then replace the cover pushing it forward until you feel and hear a click After you replace the battery the LCD will wake up and begin displaying real time readings If the MODE button is not pressed within 60 seconds the LCD will be automatically powered off Note If the battery is removed from a unit before it has been set up from software or while it is recording the unit must be reconfigured before it can be reactivated If it is not reconfigured the unit will remain in standby mode INSTALL SOFTWARE AND DRIVERS 1 Place mini disc in tray of CD DVD drive shiny side down Close tray 2 When the AutoPlay window appears click on Open folder to view files using Windows Explorer 3 Windows Explorer will indicate that there are two Files Currently on the Disc One is actually a
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