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Autonomous CApACitive DAtA ColleCtor
for high resolution wAter level meAsurements
The DCX-38 VG is an autonomous instrument for recording water level with a high resolution
and full scale ranges as low as 0,5 mWC / 50 mbar. It features a rugged, gold-plated ceramic
diaphragm for outstanding long-term stability and stainless steel housing with user serviceable
battery for long service life.
The internal electronics of the DCX-38 VG employ the latest microprocessor technology, resulting in high accuracy and resolution for pressure measurements. The use of non-volatile memory for data storage ensures high data security.
The DCX-38 VG is based upon a relative pressure sensor and is designed for submersible
deployment. Through the use of a vented cable, correction for atmospheric pressure variations
is automatic. Therefore, the expense of deploying additional instruments for monitoring barometric pressure is avoided.
DCX-38 vg
The reference pressure tube, integral to the waterproof cable, is protected from moisture
intrusion through the use of an optional desiccant tube connected to the adapter nozzle, located
in the data port.
The data collector can individually be adjusted to the user’s needs and offers the following
advantages:
- Recording of the pressure and temperature
- Simple and well structured conguration- and read-out software (Logger 4.x) for PC or PDA
- Combination of event-controlled recording and interval recording prevents unnecessary data
being recorded (i.e. only measuring the pressure changes)
- Installation data (and comments) of the measuring station can be stored in the device
Conguration / Data Retrieval:
For data readout, the serial interface is accessed via the data port located on one end of the
cable, enabling on site data retrieval. Using either the K-104A or K-103A converter cable, the
DCX-38 VG connects easily to a laptop or PC via USB or serial port. Used in conjunction with
Logger 4.x software, the DCX-38 VG is congured and data retrieved either in the lab or the
eld.
155 mm
Data Port with
Desiccant Tube
Capacitive
Data Collector
Pin 4: RS 485 A
Pin 5: RS 485 B
M20 x 1,5
ø 38 mm
KELLER AG für Druckmesstechnik
CH-8404 Winterthur
+41 52 235 25 25
info@keller-druck.com
ø 19 mm
240 ± 1,5 mm
KELLER Ges. für Druckmesstechnik mbH
D-79798 Jestetten
+49 7745 9214 0
eurocenter@keller-druck.com
KELLER America
Newport News, Virginia
1 877 253 5537
sales@kelleramerica.com
67,5 mm
ø 22 mm
Edition 10/2010
Subject to alterations
Companies approved to ISO 9001
www.keller-druck.com
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Specications
Pressure Ranges (PR) 0...50 mbar (0…0,5 mWC) 0...100 mbar (0…1 mWC) 0…300 mbar (0…3 mWC)
Overpressure 10 x Pressure Range 10 x Pressure Range 5 x Pressure Range
PR: Vented Gauge. Zero at atmospheric pressure
Supply Lithium battery / 3,6V (Type AA)
Battery Life * ~10 years @ 1 measurement/hour
Interface RS 485 digital
Electrical Connection Fischer Plug DEE 103A054
Vented Cable Standard lengths: 5 m / 10 m (others on request)
Comp. Temperature Range -10…40 °C
Total Error Band ** 0,2 %FS
Resolution max. 0,002 %FS
Stability FS ≥ 100 mbar: ± 0,1 %FS FS ≤ 100 mbar: ± 0,1 mbar
Temperature Measurement Accuracy typ. ±0,5 °C
Memory 57’000 measuring values @ storage interval ≤ 15 s, otherwise 28’000 meas. values (always with attributed time)
Shortest Measuring Interval 1 per second
Material Diaphragm: Gold-plated Ceramic / Housing: Stainless Steel AISI 316L / O-Ring: Viton
* external inuences could reduce battery capacity ** Linearity + Temperature Error within the compensated range
LOGGER 4.x
The
Windows-compatible
Logger 4.x-software, if needed, is delivered along with the interface cable or may be downloaded from our web site
. It
allows to congure and read out KELLER data loggers.
The measuring values may be graphically displayed, exported or converted into other units. The Online-function shows the actual values of the
instrument.
The Logger includes the Reader and Writer.
WRITER
The Writer enables the start and conguration of the device.
General functions:
- Online-display of measuring channels
- Status-indication
- Editing of installation data
- Ring buffer record storage or normal
- Readjustment of the zero
Recording parameter:
- Pressure- and temperature channels selectable
Start methods:
- Time start
- When exceeding or dropping below a certain pressure
- Measuring interval for starting conditions selectable
Recording methods:
- Interval (1s…99 days) and event-controlled recording;
also combinable
Logger 4.x also includes
the Windows Mobile
for PDA’s.
- Recording at pressure change
- Averaging over selectable number of measurements
READER
The Reader allows the data to be read out into a le and to be saved onto a PDA or PC.
The data le, which can be imported by programs such as Excel, contains the following data recorder information: Serial number, measuring
range, sensor name, installation data, read-out data, units, measuring values with date and clock time.
General functions:
Status-indication / Reading of the recordings’ directory with starting time and storage size in % / Read-out of the individual recordings /
Graphical display of the data / Conversion of the data into a text le for Excel import / Miscellaneous calculations possible
Special calculations or an export of the data into customer specic databases are possible (only on request).
KELLER AG für Druckmesstechnik
CH-8404 Winterthur
+41 52 235 25 25
info@keller-druck.com
KELLER Ges. für Druckmesstechnik mbH
D-79798 Jestetten
+49 7745 9214 0
eurocenter@keller-druck.com
KELLER America
Newport News, Virginia
1 877 253 5537
sales@kelleramerica.com
Edition 10/2010
Subject to alterations
Companies approved to ISO 9001
www.keller-druck.com
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