OPERATING MANUALOPERATING MANUAL
DCX DATA LOGGERSDCX DATA LOGGERS
March 2009
keller-druck.com
Contents 1 General
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The level of groundwater (or other liquids) and the fluctuations thereof can be accurately
determined on site by measuring the pressure at a defined depth beneath the surface of
1 General 3
2 Designs / Designations 3
3 Properties 4
4 Measuring Methods 4
4.1 Relative Pressure Measurement
DCX-16 VG DCX-18 ECO VG DCX-22 VG 4
4.2 Absolute Pressure Measurement
DCX-16 (SG) DCX-18 ECO (SG) DCX-22 (SG) 5/6
4.3 Absolute-Absolute Pressure Measurement
DCX-22 AA 6
5 Installation 7/8
6 Configuration / Reading out data 9
the groundwater (hydrostatic pressure). Only the density of the liquid needs to be known
to convert from pressure (mbar) to level (cm). Example for water: 100 mbar ≈ 100 cm
water column (cmWC).
With open systems, i.e. using the classic filling level measurement, measurement
always takes place in relation to the ambient pressure (air pressure at surface). For this
reason, conventional level probes (in the probe cable) have an integral capillary tube
that generates the reference to the ambient pressure directly at the sensor. This makes
the measurement independent of air pressure fluctuations acting upon the surface of
the liquid. With intelligent measuring systems it is also possible to determine the level
using an absolute pressure measurement, and compensate for the influence of the air
pressure electronically using an additional barometer. A standard cable without capillary
tube that is less susceptible to faults can be used for the level probe with this measuring
method.
Different data logger versions are available from KELLER depending on the measuring
method.
7 Replacing the battery 10
7.1 DCX-22 AA / VG / SG 10
7.2 DCX-22 11
7.3 DCX-16 11
2 Designs / Designations
8 Rechargeable battery 12
8.1 Charging the battery 12
8.2 Checking the charge / capacity 12
9 Cleaning 13
9.1 Cleaning the air pressure sensor DCX-22 AA 13
Different versions of the data logger are available with different characteristics, whereby
the main distinction is made in terms of diameter and the measuring method that is
used.
Example:
9.2 Cleaning the level probe pressure sensor 14
DCX yyxx
10 Accessories 15-19
DCX-22 AA
11 Declaration of Conformity 20
2
Device type
DCX = Data logger
Probe diameter
16 = Ø 16 mm
18 = Ø 18 mm
22 = Ø 22 mm
3
Version
.... Absolute pressure measurement /
without cable
VG relative pressure measurement /
with cable (vented)
SG absolute pressure measurement /
with cable (non-vented)
AA absolute pressure measurement with
2 sensors / with cable (non-vented)
3 Properties
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DCX-16 Small probe diameter
DCX-18 ECO Rechargeable battery operated / fully welded
DCX-22 High-precision version / customer specific versions
AA version (absolute-absolute)
4 Measuring Methods
4.1 Relative Pressure Measurement
DCX-16 VG DCX-18 ECO VG DCX-22 VG
The DCX-… VG systems are used for classic level measurement and are equipped
with a relative pressure sensor. The air pressure is routed to the rear of the sensor via the capillary tube that is integrated in the probe cable. The cable must not
be kinked or crushed! In the DCX-VG systems, the capillary tube has a GoreTex
diaphragm at the top end. This diaphragm prevents dirt or liquid from entering the
capillary tube and ensures that there is a continuous exchange of air.
DCX-16 VG DCX-18 ECO VG DCX-22 VG
4.2 Absolute pressure measurement
DCX-16 (SG) DCX-18 ECO (SG) DCX-22 (SG)
The DCX-… and DCX-… SG devices operate using an absolute pressure sensor. If the
influence of air pressure fluctuations (e.g. at shallow fluid or water depths) is also going
to be taken into consideration, a second data logger (DCX-22) with barometer is placed
at the surface and records the air pressure trend. The correct level is then calculated on
the PC as the difference between the two measured values. The Logger 4.x program
is used for this purpose.
Without read-out / installation cable
DCX-16 DCX-18 ECO DCX-22
®
4
The DCX-16, DCX-18 ECO or DCX-22 probes must be removed from the liquid to read
out the data, since the interface connector is in the probe itself.
These versions without cable can be used in an extremely flexible way.
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5 Installation
With read-out / installation cable
DCX-16 SG DCX-18 ECO SG DCX-22 SG
DCX-22 AA
Adapter ring
System length
Cable length
DCX-16 VG
DCX-18 ECO VG
DCX-22 VG
Read-out
units
Cable with integrated
capillary tube
DCX-16 SG
DCX-18 ECO SG
DCX-22 SG
DCX-16
DCX-18 ECO
DCX-22
Rope
Surface
of water
Unlike the DCX-16, DCX-18 ECO and DCX-22 models, the DCX-… SG model has
a cable with a read-out connector at the end of the cable. It is therefore possible to
read the data from the device without removing it from its measuring location.
4.3 Absolute-absolute pressure measurement
DCX-22 AA
Sensor
reference line-
DCX-22 AA
The DCX-22 AA model includes a second pressure sensor that
takes barometric pressure measurements and automatically calculates the difference between the two measurements.
Compared to the DCX-… VG models (which uses a capillary tube
to compensate barometric pressure), this solution has the advan-
Adapter Ring Seeger Ring
The data loggers are inserted into a standpipe and secured with
an adapter ring (see accessories). The relevant adapter ring is
screwed onto the housing of the read-out unit and secured with a
Seeger ring (see accessories).
tage that the entire system is completely sealed. The disadvantage
is that the resolution is somewhat lower than with the DCX-… VG
series.
The length of the cable between the sensor and the read-out unit is
restricted to 10 m in the DCX-22 AA model.
6
It must be noted that the cable length that is selected cannot be modified by the user
in the DCX models (AA / SG / VG / ECO). The required cable length must therefore be
specified when the order is placed.
7
Usage example (installation of a DCX-22 AA)
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6 Configuration / Reading out data
The dip pipe with closure cap is securely installed at the measuring
location. If the pipe needs to be fully embedded in the ground in
order to provide protection, it must be ensured that the enclosure is
vented so as not to restrict the movement of water in the dip pipe.
The probe is inserted into the pipe. It is connected via the cable
to the read-out unit, in which the battery and the barometric air
pressure sensor are also installed.
A suitable adapter ring is screwed to the read-out unit, and rests on
the edge of the dip pipe closure cap after installation. The length of
the system is now exactly defined.
In order to configure the device and read out
data, the DCX is connected to a PC (on which
the Logger 4.x software is already installed) via
an interface cable. The K-103A interface converter is used to make the connection to the serial
interface (RS-232) on the PC. Otherwise, if the
data logger is connected to a USB interface, the
K-104A or K-104M (for DCX-18 ECO) converter
must be used (see accessories). If a type K-104
converter is used, the supplied USB driver must
also be installed.
The Logger 4.x software can now be run on the
PC.
Caution:
The cable must remain connected while
communication with the DCX read-out unit
is taking place (write, read, online function).
Always stop the program before disconnecting
the cable to the data logger.
Important:
The read-out unit may only be opened and
closed in dry ambient air (e.g. to replace the
batteries). Dry the unit before opening or
closing, and clean it if necessary!
The DCX can be connected to a laptop on site using a data cable.
The device can now be configured or the measured values stored
in the data logger can be downloaded.
8
9
7 Replacing the battery
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Attention: Dry the DCX data logger before opening!
The data logger may only be opened and closed in dry ambient air to replace the batteries. Dry the logger before closing, and clean it if necessary!
Please ensure that the polarity is correct when inserting the new battery (see marking
on battery holder). Please also check the black O-rings that seal the battery compartment. If you find any damage, the seal rings must be replaced (see accessories). Please
ensure that the O-rings are not damaged when reinstalling the sleeve.
Note:
The battery capacity indicator is automatically reset to 99% whenever the battery is
changed (voltage interruption). This also takes place if the same battery or a discharged battery is re-inserted. The battery should therefore only be removed if it is fully
discharged.
DCX-22 AA DCX-22 SG DCX-22 VG
7.1
In order to replace the battery, first unscrew the knurled nut and then pull off the battery
sleeve:
7.2
DCX-22
In order to replace the DCX-22 battery, first unscrew holder and knurled nut and then
pull off battery sleeve:
O-rings
Battery sleeve
Knurled nut Holder
7.3
O-rings
DCX-16
In order to replace the DCX-16 battery, first unscrew holder and knurled nut.
Carefully disconnect battery (connector).
O-rings
O-rings
Battery sleeve
10
Knurled nut
O-ringsO-rings
Insert connector into opening in sleeve, insert new battery and then re-install battery
sleeve and knurled nut.
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8 Battery
DCX-18 ECO
8.1 Charging the battery
The DCX-18 ECO model is operated using a battery that can be charged using the
K-104M interface cable. The battery is welded into the unit and cannot be changed.
Normal charging:
Normal charging starts when the DCX-18 ECO is connected to the PC via the USB
interface. A complete charging cycle requires approximately 7 hours.
Quick charging:
If the DCX-18 ECO level probe is connected to the power supply or the car adapter
via the K-104M interface cable, quick battery charging takes place. A complete charge
requires approximately 1 hour.
8.2 Checking the charge / capacity
The battery display using the Logger 4.x software (reader/writer) shows the charging
capacity in percent. We recommend charging as soon as the capacity drops below
30%.
9 Cleaning
Dry the read-out unit before opening!
Attention: The diaphragm of the
pressure sensor is extremely sensitive.
Do not touch the diaphragm!
Pressure sensor
Sensor protection sleeve
Battery sleeve
Knurled nut
If the data logger is used in extremely contaminated media, it is advisable to check the
pressure sensor from time to time and to clean it if necessary. Do not exert pressure on
the diaphragm. Be sure to dry the read-out unit before opening!
Please avoid discharging to a capacity of less than 10%. If the data logger is not being
used, recording should be stopped and the battery recharged once per year.
12
9.1 Cleaning the DCX-22 AA air pressure sensor
In order to clean the pressure sensor properly, remove the knurled nut, the battery
sleeve and the sensor protection sleeve. Reinstall the battery sleeve with knurled nut
(without sensor protection sleeve). Rinse sensor with fresh water. Caution: do not
damage the sensitive diaphragm.
After cleaning the sensor, please ensure that all parts are dry before reinstalling the
parts.
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10 Accessories
DESCRIPTION SCOPE OF DELIVERY PRODUCT NO.
The sensor protection sleeve can be fitted (with holes away from the electrical connector). Then the battery sleeve is fitted. Attention: the battery sleeve can only be fitted in
one direction. Please ensure that the O-rings are not damaged during these assembly
operations. Otherwise they must be replaced (see accessories). Finally, the knurled nut
is reinstalled and hand-tightened.
9.2 Cleaning the level probe pressure sensor
The protection cap of the pressure sensor on the level
can be removed by hand. Then rinse sensor with
probe
fresh water, if needed.
Attention:
The diaphragm of the pressure sensor is extremely sensitive. Do not touch the diaphragm!
DCX-22 AA
2“ standpipe connection Optional 506815.0009
Closure cap Supplied with 506815.0010
for connector with hexagon DCX-16/DCX-22
socket screw (Inox M3 x 6)
for securing
Seeger ring Supplied 508830.0002
DIN: 471 (BN: 682)
Ø 18 mm
O-ring for battery
compartment Spare part 508610.0024
For model DCX-22
Ø 17 mm x 1,5 mm / nitrile
O-ring for read-out connector
For model DCX-22
Ø 13 mm x 1,5 mm / nitrile
Spare par t 508610.0051
DCX-22 / DCX-18 ECO / DCX-16
14
O-ring for read-out connector
For model DCX-18 ECO
Ø 13,5 mm x 1,5 mm / nitrile
O-ring for battery compart- Spare part 508610.0007
ment & read-out connector
For model DCX-16
Ø 11 mm x 1,5 mm / nitrile
Spare par t 508610.0055
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DESCRIPTION SCOPE OF DELIVERY PRODUCT NO.
Protection cap for DCX-16 Supplied with 507205.0033
DCX-16
Protection cap for DCX-18 Supplied with 507220.0109
DCX-18
Protection cap for DCX-22 Supplied with 507220.0001
DCX-22
Battery Supplied with 557005.0017
suitable for: DCX-16
DCX-16 (AA/SG/VG)
Make “Minamoto“:
Lithium 3,6V AAA
Battery Supplied with 557005.0010
suitable for: DCX-22
DCX-22 (AA/SG/VG)
Make “Tadiran“:
Lithium 3,6V AA
Type: SL-760
Battery Supplied with 557005.0006
suitable for: DCX-22
DCX-22 (AA/SG/VG)
Models as of 2009:
With connector cable
Make “Tadiran“:
Lithium 3,6V AA
Type: SL-760
Plug-in power supply K-102I, K-104, 309010.0025
unit 15 V (Europe) K-104B, K-104M,
K-107
DC connector
Input: 230 VAC
Output: 15 VDC, 210 mA
DESCRIPTION SCOPE OF DELIVERY PRODUCT NO.
Plug-in power supply K-102I, K-104, 309010.0026
unit 15 V (U.K.) K-104B, K-104M,
K-107
DC connector
Input: 230 VAC
Output: 15 VDC, 150 mA
Plug-in power supply K-102I, K-104, 309010.0027
unit 15 V (USA) K-104B, K-104M,
K-107
DC connector
Input: 120 VAC
Output: 15 VDC, 210 mA
Car adapter cable Optional 309010.0051
Connection to converter
K-104M (DCX-18 ECO)
Extension cable Optional 5 meters
“Reference“ 602515.0023
for DCX-18 ECO 10 meters
(PE cable Ø 5,8 mm) 602515.0024
20 meters
602515.0025
50 meters
602515.0026
100 meters
602515.0027
16
17
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54 mm 46 mm
9 mm
Y
X
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DESCRIPTION SCOPE OF DELIVERY PRODUCT NO.
Interface converter Optional 309010.0002
K-103A
(not for DCX-18 ECO)
For communication between
the PC and DCX-16/22.
Connected to serial
interface (RS 232 – RS 485
converter)
Interface converter Optional 309010.0009
K-104A
(not for DCX-18 ECO)
For communication between
the PC and DCX-16/22.
Connected to USB
interface (USB – RS 485
converter)
Interface converter Optional 309010.0050
K-104M
(only for DCX-18 ECO!)
For communication between
the PC and
DCX-18 ECO
Connected to USB
interface (USB – RS 485
converter)
(for quick charging, use plug-in power
supply unit or car adapter cable!)
DESCRIPTION SCOPE OF DELIVERY
Software CD: Logger 4.x Supplied 239005.0003
Contains the programs for
configuring the data logger
and reading out the measured
values.
The software can also be
downloaded from the Internet
free of charge:
--> www.keller-druck.com
--> Products
--> Pressure transmitters
--> Autonomous data collectors
Adapter rings for standpipe Optional
insertion
(optionally available)
Suitable for
- DCX-16 SG/VG
- DCX-18 ECO (SG/VG)
- DCX- 22 SG/VG
- DCX-22 AA
Size
[mm]
x y Drawing no. Product no.
30
25 33386 Pos. 1 506810.0006
40
25 33386 Pos. 2 506810.0018
49
39 33386 Pos. 3 506810.0015
55
50 33386 Pos. 4 506810.0019
60
55 33386 Pos. 5 506810.0014
65
55 33386 Pos. 6 506810.0020
35
32 33386 Pos. 8 506810.0022
37
32 33386 Pos. 9 506810.0025
42
32 33386 Pos. 10 506810.0026
76
32 33386 Pos. 11 506810.0027
125
32 33386 Pos. 12 506810.0030
USB connecting cable to Supplied with 309010.0052
K-104 K104 converters
18
Adapter rings for 2” standpipe
connection for light plummet
A
B
Optional
A: Opening
for light
plummet
Ø 16 mm
B: Opening
for DCX
M12 x 1,5
Drawing no. Product no.
33386-70 506810.0021
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11 Declaration of Conformity
For the following product
DCX-16 / DCX-18 ECO / DCX-22 / DCX-22 AA
We hereby declare that the product complies with the most important protection
requirements that are defined in the directive of the committee for harmonizing the
legal requirements of the member states with regard to electromagnetic compatibility (2004/108/EC).
This declaration applies to all of the above-mentioned items that are marked with
the CE symbol and are a constituent of this declaration.
The following standards were used to evaluate the products with regard to electromagnetic compatibility:
EN 61000-6-1: 2007
EN 61000-6-2: 2005
EN 61000-6-3: 2007
EN 61000-6-4: 2007
EN 61326-2-3: 2006
This declaration applies to the manufacturer:
Keller AG, St. Gallerstrasse 119, 8404 Winterthur, Switzerland
submitted by:
Keller GmbH, Schwarzwaldstrasse 17, D-79798 Jestetten
Jestetten, December 16, 2008
H.W. Keller, Managing Owner
with legally valid signature
KELLER AG für
St. Gallerstrasse 119 • CH-8404 Winterthur
Tel. ++41 (0)52 235 25 25 • Fax ++41 (0)52 235 25 00
www.keller-druck.com
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