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 . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
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.
• 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.
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 C D E B A G H Fig. 1a. 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.
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.
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.
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. 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 . If you want to install the software elsewhere, click Browse and choose another location.
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 HT50 into an available USB port of your computer.
Device HT50 is connected! Fig. 2. The three options made available by plugging the HT50 into a USB port Note: If you have already used your HT50 to log data and it is still in recording mode, plugging the unit in will cause the following window to appear. 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.
You can now use the software to “configure” your HT50. Configuring the device means choosing five key parameters: • Sampling time—How often it makes and stores humidity and temperature measurements. • Temperature unit—degrees Fahrenheit or Celsius (°F or °C). • High and low (ambient) temperature alarm setpoints • High and low humidity alarm setpoints • High and low surface (IR) temperature setpoints To begin, click on “Set up the USB Data Logger” in the window shown in the figure above.
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 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.
OPERATING INSTRUCTIONS DEPLOY THE UNIT The HT50 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 SET and STO buttons 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.
STOP LOGGING AND IMPORT LOGS To stop data logging, press and hold the SET or STO 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 HT50’s memory.
have entered during Setup. To remove any parameter or horizontal and vertical grid lines from the overall plot, uncheck its box at right. Fig. 4. A typical initial plot of an imported data log There are several features shown in Fig. 4 worth noting: • 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 print the .txt file of any data log, click the Print virtual button. • 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. • To export a file to Excel for advanced trending and analysis, click the Export to Excel button. USING THE IR THERMOMETER The HT50 has an integral IR thermometer that can be used to spot-check the temperature of any surface from a distance.
OTHER INDICATIONS As mentioned earlier, the SET and STO buttons and the LCD can be used together to display real-time temperature and humidity measurements, and to indicate the current working status of the HT50. Circuitry inside the HT50 automatically shuts down the LCD (to conserve battery life) if the SET or STO button has not been 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”.
of the STO button toggle displayed temperature readings between °C and °F. 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.
IR Temperature Measurement Resolution ±0.2°F (0.1°C) Distance-to-Spot (D:S) Ratio 2:1 Emissivity 0.95 (fixed) Internal Storage Capacity 8,000 pairs of RH/Temp readings or 5000 sets of ambient temperature, humidity and IR (surface) temperature readings Display 3-1/2-digit LCD with 60 second auto power off Temperature Response Time 0.5 seconds Humidity Response Time 5 seconds Interface USB 1.0/2.0 Length of USB Extension Cable 7.9 in. (200mm) Dimensions 4.92 x 1.69 x 0.94 in.
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). • Keep the unit out of direct sunlight. • Do not use chemicals or abrasive cloth to clean the display window or housing. • Before storing the HT50 for an extended period of time (several months or more), remove the battery to avoid having it leak and damage the unit.
RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality.
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GENERAL TOOLS & 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 HT50 User’s Manual Specifications subject to change without notice ©2012 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.
