2-CHANNEL TEMPERATURE RECORDER WITH EXCEL-FORMATTED DATA LOGGING SD CARD USER’S MANUAL 12- DT4208SD Please read this manual carefully and thoroughly before using this product.
TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 What’s in the Case. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Setup Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 8 Adjusting Thermcouple Offsets. . . . . . . . . . . . . . . . . . 8 Operating Instructions. . . . . . . . . .
INTRODUCTION Thank you for purchasing General Tools & Instruments’ DT4208SD 12-Channel Temperature Recorder with Excel-formatted Data Logging SD Card. Please read this user’s manual carefully and thoroughly before using the instrument. The DT4208SD is a general-purpose handheld instrument that can measure up to 12 channels of temperature with 0.4% accuracy using any of six different types of thermocouple. Up to eight channels can be displayed at a time.
KEY FEATURES • Twelve independent temperature measurement channels • Displays up to eight channels at a time; one push of a button switches to Channels 9 through 12 • Works with and automatically temperature-compensates for six popular thermocouple types: K, J, T, E, S and R • Combining thermocouple types extends potential measurement range to -148º to 3092ºF (-100º to 1700ºC) • Can automatically log up to 12 channels of data every day during same period (loop data recording) • Big (3.9 in.
PRODUCT OVERVIEW Figure 1 shows all of the controls and indicators on the front, right side, back and top of the DT4208SD. Familiarize yourself with the positions and functions of these controls, indicators and connectors before moving on to the Setup Instructions. TOP FRONT RIGHT SIDE BACK 1-14 1-17 Fig. 1.
SETUP INSTRUCTIONS 1. Choose the power source. Before using the DT4208SD, make sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the DC9V jack on its right side (callout 1-13). To remove the battery compartment cover (callout 1-16), remove the two screws (callout 1-17) holding it in place. Then install eight “AA” batteries in the correct orientation, using the polarity marks on the inside of the compartment as a guide.
4. Set the start and stop times for “loop data recording”—logging up to 12 channels of temperature information during the same period (for example, 14:15 to 15:30) every day. Once you have set the date and time, the display will show the flashing term “LooP” in the second row of the left column. Press the REC/ENTER button and then—with “00” flashing under the term "StAR" in the left column— use the TYPE ▲ and PAGE ▼ buttons to set the first of the four values that define the loop: the starting hour.
9. Set the data logging sampling time. Once the default temperature unit has been selected and stored, the display will show the term “SP-t” in the third row of the right column. Press the REC/ENTER button and then press the TYPE ▲ or PAGE ▼ button to decrease or increase the value until the desired sampling time appears above “SP-t”. The options are 0, 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800 and 3600 seconds (0 seconds to 1 hour). Then press the REC/ENTER button to store the selection as the default. 10.
OPERATING INSTRUCTIONS NORMAL OPERATION 1. To prepare to make measurements, power on the DT4208SD and make sure an SD card is firmly seated in the socket on the bottom of the instrument. By default, the DT4208SD uses Celsius units for temperature measurements. If you wish to make Fahrenheit units the default, press the SET button to enter setup mode. Using the HOLD/NEXT button, skip ahead to Step 8 of the Setup Instructions and perform it. 2.
HOLDING AND STORING MEASUREMENTS 1. To hold a measured value, press the HOLD/NEXT button during the measurement. Doing so will cause the word “HOLD” to appear at the top of the display. Pressing the HOLD/NEXT button again releases the hold. 2. To record and recall readings, press the REC/ENTER button while making measurements. This will make the term “REC” appear at the top of the display.
3. To end automatic data logging, first press the LOGGER button to pause data logging. Then press the REC/ENTER button and hold it for at least two seconds. This will cause “REC” to disappear. 4. To log data manually, set the sampling time to zero using Step 9 of the Setup Instructions on p. 8. Then press the REC/ENTER button once. The display will show the term “REC” on the top line and a flashing letter “P” and a number from 1 to 99 on the bottom line.
TRANSFERRING DATA FROM THE SD CARD TO A COMPUTER After automatic or manual data logging of measurements, or loop data recording, remove the SD card from the instrument and plug it into your computer either directly (if it has an SD card slot) or through an SD card reader. Because the files containing time-stamped data logs have the file extension .xls, they open in Microsoft’s Excel application. Figures 2 and 3 show two kinds of Excel presentations: a data-only screen and a graphics-only screen. Fig. 2.
SPECIFICATIONS Display type LCD with green backlight Display size 3.23 x 2.40 in.
MAINTENANCE & TROUBLESHOOTING TIPS Keep your probes and thermocouples clean. When the icon appears in the upper left corner of the display, it’s time to replace the eight “AA” batteries that power the instrument (although measurements will remain valid for several hours after the low-battery indicator first appears). Replacing the batteries requires removing the two screws that hold the battery compartment cover in place, as explained in Step 1 of the Setup Instructions on p. 6.
WARRANTY INFORMATION General Tools & Instruments’ (General’s) DT4208SD 12-Channel Temperature Recorder with Excel-formatted Data Logging SD Card is warranted to the original purchaser to be free from defects in material and workmanship. 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 for a period of one year.
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 DT4208SD User’s Manual Specifications subject to change without notice ©2013 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS.
