General HT20 Manuale utente
USB RH/TEMPERATURE
DATA LOGGER with
LCD DISPLAY
USER’S MANUAL
HT20
Please read this manual carefully and thoroughly before using this product.
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 – 4
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 – 5
Safety Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
What’s in the Blister Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product verview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 7
Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 – 12
Installing/Replacing the Battery . . . . . . . . . . . . . . 7 – 8
Install Software and Drivers. . . . . . . . . . . . . . . . . 8 – 9
Configure the Unit . . . . . . . . . . . . . . . . . . . . . . 10 – 13
perating Instructions . . . . . . . . . . . . . . . . . . . . . . . . 13 – 17
Deploy the Unit . . . . . . . . . . . . . . . . . . . . . . . . 13 – 14
Stop Logging and Import Logs . . . . . . . . . . . . . 14 – 15
Viewing, Printing and Exporting Data Logs . . . . 15 – 16
ther Indications . . . . . . . . . . . . . . . . . . . . . . . 16 – 17
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
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INTRODUCTION
Thank you for purchasing General Tools & Instruments’
HT20 USB RH/Temperature Data Logger with LCD Display.
Please read this user’s manual carefully and thoroughly
before using the instrument.
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.
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Windows®7 and Windows®XP are registered trademarks of Microsoft Corporation.
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Applications for the HT20 include:
• 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.
• Process control—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.
• 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
• ne button starts/stops data logging without a PC
• 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
• 3-1/2-digit LCD displays real-time temperature and
humidity readings; also indicates device working status
and “memory full”
• 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)
• Software also calculates dew point and displays data logs
as time-based graphs synchronized to your PC’s clock
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• ne-click exporting of logs to Excel or Word
• Long battery life (up to one year)
• Includes USB extension cable
• ne-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
• ne “1/2 AA” battery
• 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
• A USB extension cable
• A hard copy of this user’s manual (inside the fold-over
card)
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A
B
C
D
E
F
Fig. 1a. The components, controls and connector
of the HT20
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.
,
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
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Display egend
?
:indicates reading is higher than high alarm setpoint
for that parameter
@
: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
OG: Unit is logging data
- - -: Unit is in standby mode, ready to log data
FU : Internal memory is full (and logging has been
stopped)
CON: Unit needs to be configured by software
SETUP INSTRUCTIONS
INSTALLING/REPLACING THE BATTERY
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
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Fig. 1b.
All possible
display
indications
on the HT20
LATCH
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(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 “ pen folder
to view files using Windows Explorer.”
3. Windows Explorer will indicate that there are two “Files
Currently on the Disc”. ne is actually a 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 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
“I accept the terms in the License Agreement”. Then click
Next to continue.
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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 <ELUSB>. 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. n the next window that appears, click
Finish.
10. At the bottom of the Device Driver Installation Wizard that
appears next, click Next to 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.
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CONFIGURE THE UNIT
Note that the software installation has added a 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 disappears,
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.
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