Dwyer DL7 - Manual

DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com
P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
GENERAL
The Series DL7 Dataloggers are easy-to use battery-powered
data loggers that can monitor pressure and temperature. Each
unit can reliably record time-based data for later analysis, by
Trendreader software and any IBM PC or 100% compatible com-
puter.
Series DL dataloggers 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 Series DL7 Datalogger has an
on-board thermistor that can be used to monitor and record ambi-
ent temperature.
GENERAL INSTALLATION
The Trendreader software must be installed on your computer
prior to the use of any data logger described in this reference.
NOTE: The Series DL7 Differential Pressure Data Logger has
additional features not found on some of the other DL Series log-
gers. This manual describes some of the unique features of the
DL7. For additional information on graph manipulation, custom
equations, modem setup, and sample rate tables, consult the
Trendreader software manual.
SETUP
To setup your datalogger you must first have Trendreader software
installed and running on your computer. You can then configure
your logger with various options by plugging into your computer
via the interface cable. From the Communicate menu, choose
Preferred Logger SR+. To access the logger window, double click
on the logger icon or click Communicate on the menu bar and
choose the highlighted Open COM from the menu.
Series DL7 Differential Pressure Logger
Specifications - Installation and Operating Instructions
Bulletin E-90-DL7
PHYSICAL DATA
No. of Channels: Two; internal
thermistor, and a differential
pressure sensor.
Media: Dry air and noncorrosive
gases.
Max. Pressure Rating: 5x
rated pressure
Accuracy: ±0.05” w.c.
Resolution: ±0.01”w.c.
Nonlinearity: ±0.05% FS
(BFSL)
Hysteresis and Repeatability:
±0.05% FS.
Internal Thermistor Range: -
40 to 158°F (-40 to 70°C)
Internal Thermistor
Resolution: 0.7°F (0.4°C), R25
value equal to 10,000Ω [10kΩ @
25°C (77°F)]
Compensated Temp Range:
32 to 158°F (0 to 70°C)
Thermal Accuracy: ±0.5% FS.
Memory Size: 21,500 readings
Resolution: 12 bits (1 in 4096).
Stability: ±0.5% FS/yr.
Sampling Methods:
Continuous (First-out: not avail-
able from 40 ms to 8 sec.), Stop
when full (Fill-then-stop), or
Delayed start.
Sampling Rates: Selectable
from 0.04 seconds to 8 hours.
Power: Built-in 3.6V Lithium
battery, 1 Amp-hour.
Power Consumption: 5-10 µA,
continuous.
Clock Accuracy: ±2 sec/day
plus one sampling interval.
Ambient Operating Temp: -40
to 158°F (-40 to 70°C), 0 to
95% RH, non-condensing.
Connection: Two 1/8’ I.D. per-
manent protective tubing.
Computer Requirements: IBM
compatible 386 or above and
Windows™ 3.1 or later with
2mB RAM and 2mB hard drive
disk space, one serial port.
Housing: Noryl™
Weight: 4 oz (110 g).
INPUT JACK FOR INTERFACE CABLE
MAGNETIC
STRIP
11/32
[8.730] 2-1/2
[62.29]
TEMPERATURE SENSOR
1/2
[12.70]
2-7/32
[56.36]
SECURITY
EYELET
Model
Pressure Range Equation #
Number
DL70 ±0.5˝ w.c. (1.2 mbar) 13
DL71 ±1˝ w.c. (2.5 mbar) 13
DL72 ±2.5˝ w.c. (6.2 mbar) 88
DL75 ±5˝ w.c. (12.4 mbar) 37
DL710 ±10˝ w.c.(24.9 mbar) 37
EQUATION #
TABLE 1
Bulletin E-90-DL7 6/22/05 3:52 PM Page 1