General Tools DT4208SD User Manual
12-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. . . . . . . . . . . . . . . . . . . . . 9 – 12
Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . 9
Holding and Storing Measurements. . . . . . . . . 10
Automatic vs. Manual Data Logging . . . . 10 – 11
Transferring Data from the SD Card
to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance & Troubleshooting Tips . . . . . . . . . . . . 14
Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . 14
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . 15
Return for Repair Policy . . . . . . . . . . . . . . . . . . . . . . 15
2
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. The instrument also can be
configured to automatically record up to 12 channels during the same period every day—
a function called loop data recording.
Although thermocouples are not as accurate as other types of thermometers, they more
than make up for this shortcoming with an extended measurement range. For example,
the DT4208SD can measure and read out temperatures from -148º to 2372ºF
(-100º to 1300ºC) using “K” type thermocouples, and temperatures from -148º to 2102ºF
(-100º to 1100°C) using “J” type thermocouples. “R” and “S” type thermocouples have an
even higher upper limit. The two “K” type thermocouples included with the instrument have
a measurement range of -50° to 500°F (-45° to 260°F).
These very wide ranges, plus a fast response time and a low price tag, suit thermocouple
thermometers for a variety of commercial and industrial tasks requiring measurement of
very high and low temperatures. Examples include applications in the food and chemical
processing industries, HVAC (heating, ventilation and air-conditioning), power generation,
and paper production.
Because it is microprocessor-based, the DT4208SD can make full use of the portability,
reliability and large storage capacities that SD memory cards offer. Measurements can be
made automatically at any sampling rate between one second and one hour. After timestamping and storing the measurements on an SD card plugged into the instrument
(a process called data logging), the user can remove the card and plug it into to a laptop or
desktop computer either directly or through an SD card reader. The data logs are stored on
the card as files with the .xls extension, which can be opened by Microsoft’s Excel
application.
The DT4208SD has a backlit 3.9 in. diagonal display and is powered by eight “AA” batteries
or an optional 9-VDC AC adapter.
3
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. diagonal) front-panel green backlit LCD is easy to read
• Displays maximum and minimum readings and holds any reading
• Automatically logs measurements at sampling time settable from one second
to one hour
• Also supports manual data logging and changing of SD card storage location
• Outputs Excel-compatible data logs
• Accepts SD memory cards of up to 16 GB capacity
• Auto power off function that can be disabled to enable long-term data logging
• Powered by eight “AA” batteries or optional 9V AC/DC adapter
WHAT’S IN THE CASE
The DT4208SD comes fully assembled in a carrying case along with a 2 GB SD memory
card, two general-purpose “K” type thermocouples (General P/N TPK500) and this user’s
manual.
Optional accessories available from General Tools & Instruments include:
• Additional “K” type thermocouples of various diameters, types and
measurement ranges
• A 9VDC adapter for a 110V power supply
See the Optional Accessories section of this manual for more details.
4
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
RIGHT
FRONT
SIDE
1-14
BACK
1-17
Fig. 1. The DT4208SD’s controls and indicators and other physical features
1-1 LCD
1-2 POWER/ESC button
1-3 HOLD/NEXT button
1-4 REC/ENTER button
1-5 TYPE ▲ button
1-6 PAGE ▼ button
1-7 LOGGER button
1-8 SET button
1-9 Thermocouple jacks T1 through T12
1-10 SD CARD socket
1-11 RS232 output jack
1-12 RESET button
1-13 DC9V jack
1-14 Housing penetration and rubber plug
(reserved for future use)
1-15 Flip-up stand
1-16 Battery compartment cover
1-17 Battery compartment cover screws
5
Loading...