General Tools HT50 User Manual v.1
USB RH/TEMPERATURE
DATA LOGGER with
LCD DISPLAY and
IR THERMOMETER
USER’S MANUAL
HT50
Please read this manual carefully and thoroughly before using this product.
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 –4
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 –5
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
What’s in the Blister Pack. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 –7
Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 – 13
Installing/Replacing the Battery . . . . . . . . . . . . . . . . . 8
Install Software and Drivers. . . . . . . . . . . . . . . . . 8 –9
Configure the Unit . . . . . . . . . . . . . . . . . . . . . . 10 – 13
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . 14 – 19
Deploy the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Stop Logging and Import Logs . . . . . . . . . . . . . . . . . 15
Viewing, Printing and Exporting Data Logs. . . . 15 – 17
Using the IR Thermometer . . . . . . . . . . . . . . . . . . . . 17
Other Indications . . . . . . . . . . . . . . . . . . . . . . . 18 – 19
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 – 20
Maintenance Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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INTRODUCTION
Thank you for purchasing General Tools & Instruments’
HT50 USB RH/Temperature Data Logger with LCD Display and
IR Thermometer. Please read this user’s manual carefully and
thoroughly before using the instrument.
The HT50 is a low-cost, compact, battery-powered thermohygrometer capable of unattended logging (recording) of the
ambient temperature and relative humidity (RH) of an
environment for days, weeks or months. It can also measure
and optionally log surface temperatures spot-checked by a
technician using the unit's integral infrared (IR) thermometer.
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
Windows
®
XP operating system after plugging the HT50 into
one of the computer’s USB ports. The HT50’s internal flash
memory is large enough to store up to 8000 pairs of humidity
and temperature readings or 5000 sets of humidity, ambient
temperature and surface temperature readings.
Included with the product 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.
®
7 or
Windows®7 and Windows®XP are registered trademarks of Microsoft Corporation.
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Applications for the HT50 include:
• Water damage restoration—Because the HT50 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 HT50 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 HT50 can mitigate the risk of
damaging high-voltage static discharges.
KEY FEATURES
• One 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 or 5000 sets of humidity, ambient
temperature and surface temperature readings
• 3-1/2-digit LCD displays real-time temperature and
humidity readings; also indicates device working status and
“memory full”
• Built-in IR thermometer with 2:1 Distance-to-Spot ratio and
measurement range of -4° to 482°F (-20° to 250°C)
• Included software is used to set: Sampling time from
10 seconds to 12 hours; Hi/Lo alarm setpoints for humidity,
ambient temperature and surface temperature;
Temperature unit (°F or °C)
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• Software also calculates dew point and displays data logs
as time-based graphs synchronized to your PC’s clock
• One-click exporting of logs to Excel or Word
• Long battery life (up to one year)
• Includes USB extension cable
• One-year warranty
SAFETY INSTRUCTIONS
CAUTION!
The HT50’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.
Do not use the HT50 in the presence of flammable or
explosive gases.
WHAT’S IN THE BLISTER PACK
The HT50 comes in a blister pack that also contains
• One “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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PRODUCT OVERVIEW
Fig. 1a below shows the main components, controls and
connectors of the HT50. Fig. 1b (on the facing page) shows
all possible indications on the HT50’s display. Familiarize
yourself with their names and functions before moving on to
the Setup Instructions.
F
E
D
C
B
A
G
Fig. 1a.
H
I
The components, controls and connector of the HT50
A. IR sensor window
B. Laser pointer window
C. Battery compartment (opens from rear of unit)
D. 3-1/2-digit LCD (displays real-time temperature and humidity
readings; also indicates device working status and “memory
full”)
E. USB plug
F. Protective cap
G. SET and STO buttons (used to turn LCD on and switch
between temperature and humidity readings and units; also
used to start/stop logging and check unit’s working status)
H. Meas button (when pressed and held, activates
IR thermometer and laser pointer)
I. Ambient temperature and humidity sensor window
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Fig. 1b. All possible
display indications
on the HT50
Display Legend
▲: 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
IRT: Indicates operation in IRT mode
Hold: Indicates that IRT measurement is being held on
the display
[-]888.8: Humidity or temperature 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: Internal memory is full (and logging has been
stopped)
CON: Unit needs to be configured by software
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SETUP INSTRUCTIONS
INSTALLING/REPLACING THE BATTERY
The HT50 uses a 3.6VDC “1/2 AA” Lithium-ion battery.
To open the battery compartment, turn the unit over and
slide the battery compartment cover (which is clearly marked)
toward the front of the unit, in the direction opposite the
arrow on the cover. Remove the old battery 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 SET or STO 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 folder containing
a PDF of the HT50 user’s manual (as well as PDFs of the
manuals for the HT10 and HT20—versions of the HT50
without an IR thermometer). Copy the HT50 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.
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