ProMinent DULCOMETER DMT Series User manual

ProMinent®
Part no. 987426 ProMinent Dosiertechnik GmbH ·69123 Heidelberg ·Germany BA DM 163 03/08 GB
Please read the operating instructions through completely before
commissioning this equipment! Do not discard!
The operator shall be liable for any damage caused by installation or operating errors!
Operating Instructions
DULCOMETER®DMT
On-site measurement transducer
Measured variables pH/redox/temperature
Please enter the identity code of the device here.
DMTa ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
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Publishing details:
Operating Instructions
DULCOMETER®DMT on-site measurement transducer
Measured variables pH/redox/temperature
© ProMinent Dosiertechnik GmbH, 2000
Address:
ProMinent Dosiertechnik GmbH
Im Schuhmachergewann 5-11
69123 Heidelberg
Germany
Telephone: [phone]
Fax: [phone]
[email protected]
www.prominent.com
Subject to technical alterations.
Publishing details
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Table of contents
Table of contents
Device identification/identity code: measured variable pH .......................... 5
Device identification/identity code: measured variable redox ..................... 6
Device identification/identity code: measured variable temperature .......... 7
1General instructions for use ............................................................ 8
2Safety .................................................................................................. 9
2.1 Correct use ............................................................................ 9
2.2 Safety guidelines ................................................................... 9
3Storage and transport ...................................................................... 9
4Assembly and installation ................................................................ 10
4.1 Assembly (mechanical) ......................................................... 10
4.1.1 Wall mounting ........................................................................ 10
4.1.2 Pipe mounting ........................................................................ 11
4.1.3 Panel mounting ...................................................................... 12
4.2 Installation (electrical) ........................................................... 13
4.2.1 Wall mounting ........................................................................ 14
4.2.2 Pipe mounting ........................................................................ 15
4.2.3 Panel mounting ...................................................................... 15
4.2.4 Connecting coaxial cable ...................................................... 16
4.2.5 Connecting terminals ............................................................. 16
5Device overview and control elements .......................................... 17
6Function description ......................................................................... 18
6.1 General .................................................................................. 18
6.2 Key functions ......................................................................... 19
6.3 Operating menu, schematic .................................................. 19
6.4 Negotiating operating menu ................................................. 20
6.4.1 Calibration menu (pH only) .................................................... 21
6.4.2 Info display ............................................................................ 21
6.4.3 Menu options ......................................................................... 21
6.4.4 Negotiating the menu options ............................................... 21
7DMT settings ...................................................................................... 22
7.1 Measured variables pH and redox ........................................ 23
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Table of contents
7.1.1 Menu overview: measured variable pH ................................ 23
7.1.2 Menu overview: measured variable redox ............................ 24
7.1.3 Parameter settings (pH only) ................................................ 25
7.1.4 Checking the ORP probe (redox only) .................................. 25
7.1.5 Parameters: Temperature ...................................................... 26
7.1.6 Parameter output .................................................................. 28
7.1.7 General settings .................................................................... 31
7.2 Measured variable temperature ............................................ 33
7.2.1 Menu overview measured variable, temperature ................. 33
7.2.2 Parameters temperature ....................................................... 34
7.2.3 Parameter output .................................................................. 34
7.2.4 General settings .................................................................... 36
8Operating the DMT ............................................................................ 38
8.1 Permanent display ................................................................ 38
8.1.1 Probe condition information (pH only) ................................... 38
8.1.2 Brightness of LC display ........................................................ 39
8.2 Calibrating the pH meter ....................................................... 39
8.2.1 Automatic buffer detection .................................................... 39
8.2.2 The calibration process ......................................................... 40
9Troubleshooting ................................................................................. 44
9.1 Error messages during operation ......................................... 44
9.2 Error messages while calibrating the pH meter ................... 45
10 Maintenance and repair .................................................................... 46
11 Disposal .............................................................................................. 46
12 Technical data .................................................................................... 47
13 Spare parts and accessories ........................................................... 48
Appendix ............................................................................................. 49
Conformity declarationdeclaration ...................................................... 49
Terminal connection plan pH/redox/temperature ................................ 50
Wiring example - two wire system ....................................................... 51
PROFIBUS®circuit board terminal connection ................................... 52
Index .................................................................................................... 53
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Device identification/identity code: measured variable pH
Please enter the identity code for your device here.
DMTa 0 P 1 0 0
DMTa DULCOMETER®DMT series measurement transducer
Mounting type
Wwall/pipe mounted
Scontrol panel mounted (not PROFIBUS®-DMT)
Version
0with ProMinent logo
Electrical connection
94-20 mA (two wire) current loop, 24 V DC (16...40 V DC)
5PROFIBUS®-DP, 24 V DC (16...30 V DC)
Communication interface
0none
4PROFIBUS®-DP
Measured variable
PpH
Rredox (ORP)
Ttemperature
Correction variable
1temperature (PT 1000/PT 100)
Enclosure rating
0standard
Adjustable general settings:
Language
DGerman
EEnglish
FFrench
PPolish
SSpanish
IItalian
Automatic buffer detection
0ProMinent buffer set
DDIN 19226 buffer set
Vautomatic buffer adjustment
Temperature measurement
0automatic
(PT 1000 or PT 100)
1manual
2automatic or manual
9none
Output
0measured variable
(fault: 23 mA, calibration: 23 mA)
1manually adjustable
current value
2measured variable or manual
(fault: 23 mA, calibration: 23 mA)
3measured variable or manual
(fault: 23 mA, calibration: HOLD)
44mA constant current
Other settings
0standard
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Device identification/identity code: measured variable redox
Please enter the identity code for your device here.
DMTa 0 R 1 0 0 0
DMTa DULCOMETER®DMT series measurement transducer
Mounting type
Wwall/pipe mounted
Scontrol panel mounted (not PROFIBUS®-DMT)
Version
0with ProMinent logo
Electrical connection
94-20 mA (two wire) current loop, 24 V DC (16...40 V DC)
5PROFIBUS®-DP, 24 V DC (16...30 V DC)
Communication interface
0none
4PROFIBUS®-DP
Measured variable
Rredox
PpH
Ttemperature
Correction variable
1temperature (PT 1000/PT 100) - measurement only
Enclosure rating
0standard
Adjustable general settings:
Language
DGerman
EEnglish
FFrench
PPolish
SSpanish
IItalian
Probe type
0standard
Temperature measurement
0automatic
(PT 1000 or PT 100)
9none
Output
0measured variable
(fault: 23 mA, calibration: 23 mA)
1manually adjustable
current value
2measured variable or manual
(fault: 23 mA, calibration: 23 mA)
3measured variable or manual
(fault: 23 mA, calibration: HOLD)
44mA constant current
Other settings
0standard
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Please enter the identity code for your device here.
DMTa 0 T 0 0 0 0 0
DMTa DULCOMETER®DMT series measurement transducer
Mounting type
Wwall/pipe mounted
Scontrol panel mounted (not PROFIBUS®-DMT)
Version
0with ProMinent logo
Electrical connection
94-20 mA (two wire) current loop, 24 V DC (16...40 V DC)
5PROFIBUS®-DP, 24 V DC (16...30 V DC)
Communication interface
0none
4PROFIBUS®-DP
Measured variable
PpH
Rredox (ORP)
Ttemperature
Correction variable
0none
Enclosure rating
0standard
Adjustable general settings:
Language
DGerman
EEnglish
FFrench
PPolish
SSpanish
IItalian
Probe type
0PT 100 or PT 1000
Temperature detection
0Probe (PT 1000 or PT 100)
Output current
0Output: measured variable
(fault: 23 mA, calibration: 23 mA)
1Output adjustable
2measured variable or adjustable
(fault: 23 mA, calibration: 23 mA)
3measured variable + manual + HOLD
(fault: 23 mA, calibration: HOLD)
4Output current = 4 mA
Other settings
0standard
Device identification/identity code: measured variable temperature
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1General instructions for use
Please read through these instructions for use carefully. They will enable you
to make the best possible use of this operating instructions manual.
The following sections are highlighted in the text:
•Enumerated points
왘Instructions
Working instructions
NOTE
Guidelines are intended to make your work easier.
and safety instructions:
CAUTION
Describes a potentially dangerous situation.
Non-observance can lead to personal injury or damage
to property.
IMPORTANT
Describes a potentially dangerous situation.
Non-observance can lead to damage to property.
General instructions for use
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2Safety
2.1 Correct use
The DMT on-site measurement transducer is designed exclusively for the
•measurement of pH value resp. redox potential
•measurement of temperature
•display of measured variables
•production of an output signal
It is prohibited to use the device for any other applications or to modify it
in any way!
The device must not be used outdoors without added protection (housing,
weatherproof cover).
2.2 Safety guidelines
CAUTION
•The device must not be used in a possible explosion
area.
•The DMT must be operated by trained and authorised
personnel.
IMPORTANT
•The system must be suitably equipped and configured to
prevent overdosing of hazardous materials due to probe
failure.
•The DMT has no on/off switch. It starts to function as soon
as it is connected to a power supply.
3Storage and transport
Store and transport the DMT in the original packaging.
IMPORTANT
•Protect the DMT from damp and the effects of chemicals
even when packed.
Ambient conditions for storage and transport:
Temperature: -20 °C to 70 °C
Humidity: max. 95 % relative humidity,
non condensing
Safety / Storage and transport
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4Assembly and installation
IMPORTANT
•The DMT is fully resistant to normal environments control
rooms.
•The DMT must not be placed where it can come into
contact with rain or direct sunlight!
Use a protective housing or weatherproof cover if in use
out of doors.
4.1 Assembly (mechanical)
The DMT can be wall, pipe or panel mounted (not for PROFIBUS®-DMT).
4.1.1 Wall mounting
Mounting materials (included in delivery):
1 x wall/pipe bracket
2 x 5x45 mm round headed screws
2 x 5.3 washers
2 x wall plugs Ø 8 mm, plastic
1 x rubber insert
1 x locking screw (PT)
Wall mounting, please follow the steps below:
왘Remove wall/pipe bracket from DMT:
pull the two snap fasteners outwards and push upwards (fig. 1, ➀).
Swing the wall/pipe bracket away from the DMT and pull downwards
(fig. 1, ➁).
왘Mark two drill holes diagonally opposite one another using the mounting
bracket as a template.
왘Drill the holes: Ø 8 mm, depth = 50 mm.
왘Screw the wall/pipe bracket in place inserting the washers (fig. 2).
왘If the DMT is also to be secured with a screw, pierce the screw hole in the
back of the housing (housing must be open) and attach a rubber insert
(fig. 2, ➀) to the bracket.
왘Hang the DMT onto the top of the bracket (fig. 3, ➀) and push down
gently against the bracket (fig. 3, ➁), then push upwards until you hear
aclick (fig. 3, ➂).
왘Tighten the locking screw to secure more firmly (housing is open).
Assembly and installation
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Fig. 1 Fig. 2
2
3515_4
1
1
3461_4
Fig. 3
3
2
1
3464_4
4.1.2 Pipe mounting
Mounting materials (included in delivery):
1 x wall/pipe bracket
2 x cable ties
1 x sealing cap
1 x locking screw (PT)
Can be mounted onto pipes of diameters from 25 mm to 60 mm.
Assembly and installation
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Pipe mounting, please follow the steps below:
왘Remove wall/pipe bracket from DMT:
pull the two snap fasteners outwards and push upwards (fig. 1, ➀).
Swing the wall/pipe bracket away from the DMT and pull downwards
(fig. 1, ➁).
왘Fasten the bracket to the pipe using the cable ties or pipe clamps (fig. 3).
왘If the DMT is also to be secured with a screw, pierce the screw hole in the
back of the housing (housing must be open) and attach a rubber insert
(fig. 2, ➀) to the bracket.
왘Hang the DMT onto the top of the bracket (fig. 3, ➀) and push down
gently against the bracket (fig. 3, ➁), then push upwards until you hear a
click (fig. 3, ➂).
왘Tighten the locking screw to secure more firmly (housing is open).
4.1.3 Panel mounting
IMPORTANT
•The control panel must be thick enough to withstand the
weight of the mounted DMT without buckling. (To achieve
enclosure rating IP 54, steel must be at least 2 mm thick;
plastic should be correspondingly thicker).
NOTE
The DMT will protrude from the control panel approx. 30 mm
once mounted.
Fig. 4
3463_4
Assembly and installation
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Panel mounting, please follow the steps below:
왘Decide on the exact position of the DMT on the panel using the drill
template.
왘Centre punch the holes for the screws and cut-out through the drilling
template.
왘Drill the four screw holes with a Ø 3.5 mm diameter drill bit.
왘Punch out the cut-out or drill the four inner holes using an Ø 8 mm
diameter drill bit and pierce out the cut-out with a keyhole saw.
CAUTION
Sharp edges can cause injury.
왘File off cut edges.
왘Insert the profile seal into the groove provided on the DMT.
왘Place the DMT onto the cut-out and screw in place.
IMPORTANT
Check that the seal is located correctly.
IP 54 is only achieved when assembly has been carried out
correctly.
4.2 Installation (electrical)
IMPORTANT
•Installation must be carried out by specially trained
personnel.
•Installation can only be carried out after assembly has been
completed.
•The device must be connected to a protective low voltage
in accordance with EN 60335-1.
•Observe the relevant technical data in chapter 12
throughout installation procedures.
•The current loop must be disconnected from the power
supply during installation.
•The DMT signal cable must not be laid next to leads subject
to high levels of interference. Can lead to malfunction of
DMT.
•The hinge between the front and back sections of the
housing is not particularly strong. When working on the
front section it should be held securely in place.
Assembly and installation
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4.2.1 Wall mounting
왘Unfasten the four housing screws
왘Lift the front section slightly forwards and then swing open to the left.
왘Pierce threaded cable apertures at the bottom of the rear side as required
(fig. 5).
Fig. 5
3468_4
NOTE
•The large gland (M 20 x 1.5) is intended for the sensor
cable.
•Feed the power cable leftwards through the smaller
threaded connector (M 16 x 1.5). Follow with the other
sensor cables (e.g. PT 1000).
왘Tighten the threaded connectors (fig. 6, ➀) as required.
왘Use reducers as required (fig. 6, ➁) to adapt the sizes of the threaded
connectors to the actual cable diameters.
왘Feed the cables into the threaded connectors.
왘Now proceed according to 4.2.4 Connecting coaxial cable and
4.2.5 Connecting terminals.
Then follow the steps below:
왘Tighten the locking screws (fig. 6, ➂) for the threaded connectors.
왘Swing the front section onto the back section.
Assembly and installation
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IMPORTANT
Check that the seal is located correctly. IP 65 is achieved only
when assembly has been carried out correctly.
(If necessary pull the front section forward in order to reduce
the stress on the seal.)
왘Tighten the housing screws finger tight.
Fig. 6
Cl/ClO /O
Cl/ClO /O
3
2
-
-
+
+
4to20mA
4to20mA
shield
shield
(gr) Pt1000 - /sig.gnd.
(gr) Pt1000 - /sig.gnd.
(wth) Pt1000 +
(wth) Pt1000 +
(bl) +U
(bl) +U
---
---
(blk)-U
(blk)-U
(br) meas.sig.
(br) meas.sig.
Pt100x -
Pt100x -
Pt100x +
Pt100x +
---
---
liquid pot.
liquid pot.
r
r
ef.el.
ef.el.
glass el.
glass el.
pH/OR
pH/OR
P
P
8
8
6
6
5
5
4
4
3
3
2
7
7
1
1
3465_3
1
2
3
4
4.2.2 Pipe mounting
See 4.2.1 Wall mounting
4.2.3 Panel mounting
NOTE
The cable must be laid in cable ducting on site to minimise
stresses.
Connect the cable from the back through the cut-out in the control panel:
왘Follow the steps given in 4.2.4 Connecting coaxial cable and 4.2.5
Connecting terminals.
Assembly and installation
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4.2.4 Connecting coaxial cable
The pH resp. redox probe is connected via a coaxial cable:
왘Strip back to reveal cable shield (reference electrode) in accordance with
fig. 7 (left) and clamp using the shield clip.
The shield clip is connected internally to terminal 3.
Under normal circumstances measuring can be carried out without
connecting a liquid reference potential. In this case provide wire jumpers
between terminals 1 and 2.
When electrical conditions are more complex a potential plug should be
connected to terminal 1. Terminal 2 is left free.
The appendix contains an overview of connection options (terminal
connection plan).
4.2.5 Connecting terminals
왘Remove insulation from cable ends as shown in fig. 7 (right) and attach
end crimps to each core.
왘Connect the cables in accordance with the terminal connection plan.
IMPORTANT
•Do not operate PROFIBUS®variants at voltages over 30 V.
•
Connect PROFIBUS
®
variant power supplies via terminals 3
and 4 on the PROFIBUS
®
circuit board in the back section,
not terminals 7 and 8 in the front section.
NOTE
•The terminal connection plan is given in the appendix.
There is also a panel giving connection information affixed
to the housing near the terminals (fig. 6, and fig. 8).
•Push the cable through the housing until the front section
can be moved up and down easily.
•If the LC display is too weak, reduce the brightness using
the up arrow key . If the display is too dark, increase the
brightness using the down arrow key .
Fig. 7 Fig. 8
33
12
30
7
7
3459_4
Cl/ClO /O3
2
-
+
4to20mA
shield
(gr) Pt1000 - /sig.gnd.
(wth) Pt1000 +
(bl) +U
---
(blk)-U
(br) meas.sig.
Pt100 -
Pt100 +
---
liquid pot.
ref.el.
glass el.
pH/ORP
8
6
5
4
3
2
7
1
Assembly and installation
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5Device overview and control elements
Fig. 9
3456_4
Device overview and control elements
Change key
CAL key
Measured
variable label
LC-Display
Down key
Back key
Enter Key
Up key
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6Function description
6.1 General
The DULCOMETER®MEASUREMENT TRANSDUCER (DMT) is a micro-
processor controlled on site measurement transducer. It displays the
selected measured variable and produces a proportional output signal. It can
also use temperature as a correction variable. The user can specify these
functions using the operating menu.
The user can switch between the measured variables pH value, redox
potential and temperature.
The inputs are collectively electrically insulated against the output.
In the event of a fault the DMT indicates an error message on the LC display
and produces an increased current (23 mA) through the ring circuit.
The DMT is also available for the following measured variables:
•Conductivity
•Chlorine
Block circuit diagram
Function description
Signal
output
4 ... 20 mA
at
16 ... 40 V DC
and/or
30 V DC
(PROFIBUS
®
variant)
µP
Keypad LC display
EEPROM
(parameter memory)
DA
AD
Measured
variable
temperature
FlashROM
(program memory)
Power supply,
current control
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6.2 Key functions
The key are used to alter the DMT settings and have the following
functions:
In the permanent display / In the menu options
in the info display
Change key Toggles between permanent Scrolls through values of the
display and info display current menu option
modes
Back key Exits info display mode and Exits to info display without
returns to permanent display saving changes to values
mode
Enter key Accesses menu option Saves changes to values in
(from an info display) current menu option and
accesses the next info
display or another menu
option
CAL key Opens the calibration menu Activates calibration in
(from permanent display) calibration menu (pH only)
Down key Alters brightness of the Changes a value
LC display
Up key (in permanent display mode)
6.3 Operating menu, schematic
The operating menu comprises:
•the permanent display
•the calibration menu
•the info displays (info level)
for the display of pre-set parameters resp. general settings
•menu options (settings level)
for altering parameters resp. general settings
Function description
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6.4 Negotiating operating menu
NOTE
•The back key can be used to exit the operating menu at
any time. Depending upon where you are in the operating
menu, you will return either to the permanent display or to
the corresponding info level.
•The display will automatically return to permanent display
if you do not press a key within 5 min. (does not save
changes to values).
•If an access code has been activated by the user, access
code protection is applied to both the calibration menu and
the settings level menu options.
To access these menu options the access code must be
entered when it is requested and confirmed with the enter
key . Access restriction is reinstated each time you
return to the permanent display.
•The access code is factory set to 5000 (inactive).
= Request access code
(only when activated by user)
Calibration menu
pH only
Info display 1
Info display X
Menu option 1
Menu option 1
Permanent
display
Menu option 2
Info level Settings level
Function description
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