Dwyer DL-8T - Manual

Series DL Data Logger
Specifications - Installation and Operating Instructions
Bulletin E-90-DLX
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
The Series DL Data Loggers are easy-to-use battery-powered
data loggers that can monitor a variety of inputs. The logger is
designed to work as a stand alone unit or perform remote moni-
toring. Pocket-sized and rugged, they can be used in a wide range
of environmental and industrial applications. Each unit can reliably
record time-based data for later analysis, by TreadReader software
and any IBM PC or 100% compatible computer.
Series DL data loggers run continuously – constantly measuring
and recording readings from any enabled channel. Self-powered
by a long life lithium battery that will provide years of reliable oper-
ation, your logger can work independently from any external
power supply or computer. Each DL Data Logger has on-board
thermistor that can be used to monitor and record ambient tem-
perature.
GENERAL INSTALLATION (for all DL Loggers)
The TreadReader software must be installed on your computer
prior to the use of any data logger described in this reference.
Setup
To setup your data logger you must first have TreadReader soft-
ware installed and running on your computer. You can then con-
figure your logger with various options by plugging into your com-
puter via the interface cable.
Set Sampling Rate
Always confirm the sampling rate (how often the logger takes
readings) to make sure it will be acceptable to your application.
You can alter the frequency at which the logger records readings
by accessing Logger, Communicate, Setup, Sample Rate in
TreadReader software. Here you will be able to choose from a
menu that gives the following interval alternatives: 8, 16, 32, and
56 seconds; 2, 4 and 56 minutes; 10, 20, and 30 minutes. The
sampling rate will apply to all active channels on the logger.
Making External Connections
If you are using your logger to monitor external modules, sensors,
or circuitry, make sure the connections are secure. Also, be sure
the terminal block is snapped securely in the logger.
Enable Channels
SPECIFICATIONS
No. of Channels: Model dependent.
Internal Thermistor Range: -40 to 158°F (-40 to 70°C).
Internal Thermistor Resolution: 0.7°F (0.4°C), R25 value
equal to 10,000 Ω.
Operating Temperature: 32 to 122°F (0 to 50°C).
Memory Size: Model dependent.
Sampling Methods: Continuous (first-in, first-out) or stop when
full (fill-then-stop).
Sampling Rates: 0.04 seconds to once every 8 hours, selec-
table.
Resolution: 12 bits.
Power: 3.6V Lithium battery.
Power Consumption: 5-10 μA.
Clock Accuracy: Model dependent.
Ambient Operating Temperature: -50 to 160°F (-45 to 70°C),
0 to 95% RH, non-condensing.
Connection: Removable screw terminal.
Computer Requirements: IBM compatible and running
Windows
® 3.1, Windows ® 95, Windows ® 98, Windows ® 2000,
Windows ® ME, Windows ® NT, or Windows ® XP with 2 MB RAM
and 2 MB hard drive disk space, one serial port.
Housing: Plastic.
Weight: 5 oz (110 g).
SECURITY
EYELET
MAGNETIC
STRIP
.450
SERIAL NO.
3.375
2.956
TEMPERATURE
SENSOR
INPUT JACK FOR
INTERFACE CABLE
.664
Always make sure that you have enabled and verified the correct
channels for your application. It can be very distressing to find out
later that the information you hoped to collect was from an inac-
tive channel. You can selectively enable additional channels in your
logger as required. However, in order to avoid using logger mem-
ory unnecessarily, disable any channels which are not required.
Clear Memory
Before sending the logger out to the field to collect data, empty the
logger memory. This will help to keep collected files smaller as well
as decrease the time needed to back-up the logger later. Note that
clearing the logger’s memory is automatic if you make setup
changes (i.e. assign different equations, change filename, etc.)
Test
Series DL-AC
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