ProMinent DULCOMETER DMT Series User manual

ProMinent®
Operating Instructions
Two-wire measurement transmitter
DULCOMETER®DMT
Measured variable Conductivity
Please carefully read through these operating instructions in full before
commissioning this equipment! · Do not discard!
The operator shall be liable for any damage caused by installation or operating errors!
Part No. 987636 ProMinent Dosiertechnik GmbH · 69123 Heidelberg · F. R. Germany BA DM 180 04/10 EN
Please enter the identity code for your device here!
DMTa ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr1

2ProMinent®
Legal notice:
Operating Instructions
Two-wire measurement transmitter DULCOMETER®DMT
Measured variable Conductivity
© ProMinent Dosiertechnik GmbH, 1999
Address:
ProMinent Dosiertechnik GmbH
Im Schuhmachergewann 5-11
69123 Heidelberg
Germany
Telefon: [phone]
Fax: [phone]
[email protected]
www.prominent.com
Subject to technical alterations.
Legal Notice
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr2

3
ProMinent®
Table of Contents
Page
Device Identification/Identity Code....................... 4
1General Guidelines for Use ............................................. 5
2Safety........................................................................................................ 6
2.1 Enclosure Ratings/Standards ...................................... 6
3Storage/Transport...................................................................... 7
4Device Overview/Operating Elements ................ 7
5Function Description .............................................................. 8
5.1 General ......................................................................................... 8
5.2 Key functions ........................................................................... 9
5.3 Operating menu, schematic ......................................... 10
5.4 Negotiating operating menu......................................... 10
6Assembly/Installation ............................................................ 12
6.1 Assembly (mechanical) .................................................... 12
6.2 Installation (electrical) ........................................................ 16
7Configuring the DMT............................................................... 20
7.1 Parameters Temperature ................................................ 21
7.2 Conductivity Sensor Connection .............................. 23
7.3 Parameter Measurement ................................................ 24
7.4 Parameter Output................................................................. 25
7.5 General Settings .................................................................... 27
8Operation ............................................................................................. 28
9Trouble Shooting ......................................................................... 30
10 Maintenance/Repair ................................................................ 31
11 Disposal ................................................................................................. 31
12 Technical Data................................................................................ 32
13 Replacement Parts and Accessories................... 33
Appendix
EC Declaration of Conformity ................................................... 34
Terminal Connection Diagram .................................................. 35
Wiring example - two wire system ........................................ 36
PROFIBUS®circuit board terminal connection ........... 37
Index ............................................................................................................ 38
Drilling template
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr3

4ProMinent®
Device Identification/Identity Code
DMTa
Please enter the identity code for your device here!
DMTa DMT series DULCOMETER®measurement transmitter
Assembly type
WWall mounted
SControl panel mounted (not PROFIBUS®-DMT)
Version
0with ProMinent logo
1None
Electrical connection
94-20 mA 2-wire
5PROFIBUS®-DP, 24 V DC (16...30 V DC)
Communication interface
0None
4PROFIBUS®-DP
Measured variable
LConductivity
Correction variable
1Temperature (Pt 100/Pt 1000)
Enclosure rating
0Standard
Language (adjustable via General Settings)
DGerman
EEnglish
FFrench
SSpanish
IItalian
PPolish
Sensor, type (adjustable via General Settings)
0Cell constant k = 1
1Cell constant k = 0.1
2Cell constant k = 0.01
3Cell constant k = 10
Temperature correction (adjustable
via General Settings)
0Autom. temperature correction
(Pt 100 or Pt 1000)
1Manual temperature correction
2Autom./manual temperature correction
9Without temperature correction
Output (adjustable via
General Settings)
0Conductivity (Error 23 mA,
Calibration 23 mA)
1manually adjustable current value
2Conductivity or manual (Error 23 mA,
Calibration 23 mA)
44mA constant current
Other Settings
0Standard
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr4

5
ProMinent®
General Guidelines for Use
1General Guidelines for Use
Please read through the following guidelines. Familiarity with the
following points ensures optimum use of the operating instructions.
Key points are indicated as follows
•Enumerations
➤Instructions
Settings Menus
NOTE
Notes are intended to make your work easier.
and safety instructions:
CAUTION
Describes a potentially dangerous situation.
Could result in personal injuries or damage to
property if not observed.
IMPORTANT
Describes a potentially damaging situation.
Could result in damage to property if not observed.
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr5

6ProMinent®
2Safety
Correct use The on-site measurement DMT transmitter is designed exclusively
for:
•the measurement of conductive conductivity
•the measurement of temperature
•the display of conductivity and temperature values
•the production of an output signal of the conductivity value
All other uses or modifications is forbidden!
SAFETY INSTRUCTIONS
•The DMT has no on/off switch. It starts to operate
as soon as it is connected to an electrical supply.
•Overdosage of dangerous chemicals in the event
of sensor failure or disconnection must be avoided!
Ensure system is configured for this!
•The DMT must only be operated by appropriately
trained and authorised personnel!
• The device may not be used in hazardous
locations!
•The device may not be used outdoors without
added protection (extra covering, weather-proof
lid)! The housing may be affected by direct
sunlight!
2.1 Enclosure Ratings
Enclosure ratings When assembly is carried out correctly the following enclosure
ratings apply:
•Wall/pipe mounted version: IP 65
•Control panel mounted version: IP 54
Safety
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr6

7
ProMinent®
3Storage/Transport
Transport and store the DMT in the original packaging!
Protect also the packed DMT from the effects of chemicals and
moisture!
Ambient conditions for storage and transport:
Temperature: -20 ºC to 70 ºC
Humidity: < 95 % relative humidity,
non-condensing
4Device Overview/Operating Elements
Storage/Transport / Device Overview/Operating Elements
„Change“ key
„Back“ key
„Down“ key
„CAL“ key
„Enter“ key
„Up“ key
Measured
variable
LCD-Display
3456_4
Fig. 1
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr7

8ProMinent®
5Function Description
5.1 General
The DULCOMETER®MEASURING TRANSMITTER (DMT) is a
microprocessor controlled on-site measurement transmitter. It
measures and displays conductivity and produces a proportional
output signal. It can also operate using temperature as a
correction variable. The operator can configure these processes
via the operating menu.
The inputs are jointly electrically isolated from the output.
In the event of a fault occurring the DMT displays an error
message. It also generates an increased current (23 mA) in the ring
circuit.
The DMT is available for the following measured variables:
•Conductivity
•pH
• Redox
•Temperature
•Chlorine
Block circuit diagram
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
Function Description
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr8

9
ProMinent®
5.2 Key functions
The DMT settings are altered using the keys. The key functions are
as follows:
In input menus and In menu options
permanent displays
"Change" key used to toggle between the select a value in a menu
permanent displays and option
input menus
"Back" key return from input menu and change to input menu from
permanent display 2 to menu option without saving
permanent display 1 changes to value
"Enter" key change to menu options save changes to value and
(enter access code if one exit menu option
is set) change to input menu or
another menu option
"CAL" key open a calibration menu from open a calibration menu,
a permanent display if available
"Up/down" keys alter contrast from the change a value
permanent display
Function Description
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr9

10 ProMinent®
5.4 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).
Function Description
Calibration menu
Info display 1
Info display X
Menu option 1
Permanent
display
Info level Settings level
= Request access code
(only when activated by user)
Menu option 1 Menu option 2
5.3 Operating menu, schematic
The operating menu comprises:
•the permanent display
•the calibration menu
•the info display (info level)
for viewing the set parameters or basic settings
•the menu options (setting level)
for changing the parameters or basic settings
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr10

11
ProMinent®
•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 con-
firmed 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).
5.4.1 Calibration menu
Access the calibration menu from the permanent menu using the
CAL key (further details given in 8 Operation)
5.4.2 Info Display
Access the first info display of the info level from the permanent
display using the change key .
Use the change key to access the other info displays in turn.
Returns to the permanent display after the last info display.
5.4.3 Menu options
Use the enter key to access the menu options associated with
that info level.
5.4.4 Negotiating the menu options
input: sensor
unit: ˚C
offset = 0.00 ˚C
meas. val. = 21.00 ˚C
= adjustable numerical
values/texts flashing
Press the change key to activate all adjustable values in a menu
option.
Flashing values can be altered. Use the arrow keys / to alter
numerical values or texts.
Keystrokes perform the following actions:
•1x short keystroke reduces/increases a numerical value by one
increment or alters a text
•Holding the key down for longer alters numerical values
increasingly rapidly.
Use the enter key to save changed values in the menu option.
You will then automatically enter the next info display or (if available)
the next menu option.
Function Description
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr11

12 ProMinent®
Assembly/Installation
2
13515_4
NOTE
Your entries become active immediately and are
stored permanently when you press the enter key .
If you do not wish to save changes, exit the menu option using the
back key . You will then return to the info display for that menu.
6Assembly/Installation
IMPORTANT
•The DMT is resistant to normal atmospheres in
technical areas.
• The DMT must not be placed in direct sunlight!
For outdoor use always provide extra covering or
weatherproof lid!
6.1 Assembly (mechanical)
The DMT is designed for mounting onto a wall or pipe or into a
control panel.
6.1.1 Wall Mounting
Mounting fittings:
1x wall/pipe bracket
2x round head screw 5x45 mm
2x washer 5.3
2x plug Ø 8 mm, synthetic
1x rubber cap
Fig. 2
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr12

13
ProMinent®
Assembly/Installation
2
1
3461_4
Please follow these steps when mounting to the wall:
➤Pull wall/pipe bracket away from DMT
➤Pull both snap hooks outwards and push up, see fig. 2, 
➤Fold wall/pipe bracket away from DMT and pull down,
see fig. 2, 
➤Mark two drill holes at diagonals to one another, using the
wall/pipe bracket as a drilling template
➤Drill holes: Ø 8 mm, depth = 50 mm
➤Screw on wall/pipe bracket with washers
➤If the DMT needs addional securing with a screw, pierce the
screw hole in the back section and attach a rubber cap  to
the wall/pipe bracket, see fig. 3.
➤Lower the DMT so it is hanging from the top of the wall/pipe
bracket and exert light downwards pressure against the wall/
pipe bracket until it engages, then push upwards until you hear
it engage for a second time
➤Now tighten the locking screw for added security.
Fig. 3
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr13

14 ProMinent®
6.1.2 Pipe Assembly
Mounting fittings:
1x wall/pipe bracket
2x cable connectors
1x rubber cap
May be assembled onto pipes with diameters from 25 mm to
60 mm.
Please observe the following steps when mounting onto a pipe:
➤Fix the wall/pipe bracket in place using the cable connectors
or hose clamps, see fig. 4
➤Proceed as described under 6.1.1 Wall Mounting
Fig. 4
Assembly/Installation
3
2
1
3464_4
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr14

15
ProMinent®
6.1.3 Control Panel Assembly
IMPORTANT
•The control panel must be thick enough to
withstand assembly without buckling! (Minimum
2mm thickness steel; correspondingly thicker if
plastic!) Otherwise the device will not conform to
enclosure rating IP 54!
•Check the measurements of the drilling/stamping
template!
NOTE
Once assembled, the DMT projects approximately
30 mm from the control panel.
Please observe the following steps when mounting on a control
panel:
➤Locate the DMT precisely on the control panel using the drilling/
stamping template and fix this in place
➤Centre-punch the holes for the screws and the cut-out through
the drilling/stamping template
➤Drill the 4 screw holes with a 3.5 mm Ø drill
➤Pierce out the cut-out with a keyhole saw, or if this is not to be
pierced out, drill the 4 holes in the cut-out area with a 8 mm Ø
drill.
Fig. 5
Assembly/Installation
3463_3
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr15

16 ProMinent®
CAUTION
Sharp edges can cause injury!
➤File off sharp edges.
➤Insert the profile seal into the groove of the DMT.
➤Place the DMT onto the cut-out and screw in place.
IMPORTANT
Check location of seal once more! Enclosure rating
IP 54 is only achieved when assembly is carried out
correctly!
6.2 Installation (electrical)
IMPORTANT
•Installation may only be carried out by specialist
trained and appropriately certified personnel!
•Installation may only be carried out once assembly
is complete!
•The device may only be connected to a separated
extra low voltage in accordance with EN 60335-1!
•The device must be disconnected from the power
during installation and reconnection must be
reliably prevented!
•The DMT signal cables may not be laid next to
leads that are subject to interference! In particular,
the controller and power supply leads for inductive
equipment (e.g. solenoid valves, contactors or
servo motors) must be enclosed in separate cable
ducting. These must not run alongside the signal
cables over long distances. If it is not possible to
provide a low interference electrical environment,
special interference suppression measures must
be taken! Very strong interference can lead to
incorrect functioning of the DMT or irreparable
damage!
•The hinge between the front and back sections of
the housing cannot withstand mechanical loads!
When working on the front section it must be held
safely!
Assembly/Installation
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr16

17
ProMinent®
NOTE
If the LCD display window in the DMT appears very
faint when the device is operating, then it may be
adjusted from a permanent display using the arrow
keys.
6.2.1 Wall Mounted Version
➤Undo the four housing screws and push the front
section to the left.
➤Break open as many thread holes on the underside of
the rear section as required (see fig. 6): use 4.5 mm
diameter screwdriver.
NOTE
•The large cable gland (M20 x 1.5) is intended for
the sensor cable.
•With the small cable glands (M16 x 1.5), it is good
practice to bring the supply cable in on the left,
followed by the cables for additional sensors
(e.g. Pt 1000).
Fig. 6
➤Screw on the corresponding PG threaded connectors (fig. 7, ➀)
and tighten (not locking screws).
➤Insert reducers (fig. 7, ➁) as required for the diameter of the
cable into the PG threaded connectors.
Assembly/Installation
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr17

18 ProMinent®
➤Feed the cables into the threaded connectors
➤You will find further steps in section 6.2.4 Connecting terminals
NOTE
Feed sufficient cable into the housing to allow the
front section to move freely. Cut off outer insulating
sheath so that only 2 cm projects into the housing.
After this, please procede as follows
➤Screw locking screws (Fig. 7, ➂) on the threaded connectors
until tight
➤Swing the front section onto the rear section
IMPORTANT
Check the location of the seal once more! IP 65
enclosure rating is only achieved when assembly is
carried out correctly!
(If necessary, pull the front section forward a little in
order to relieve stress on the seal.)
➤Fasten the housing screws fingertight
Fig. 7
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.
ref.el.
ref.el.
glass el.
glass el.
pH/ORP
pH/ORP
8
8
6
6
5
5
4
4
3
3
2
2
7
7
1
1
3465_3
1
2
3
4
6.2.2 Pipe Mounted Version
See 6.2.1 Wall Mounting
Assembly/Installation
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr18

19
ProMinent®
6.2.3 Control Panel Version
Feed the cable from the back through the cut-out into the control
panel:
➤You will find further steps in section 6.2.4 Connecting terminals
NOTE
To relieve stress on cables they must be inserted into
a cable duct on site.
6.2.4 Connecting terminals
➤Remove insulation from cable ends as shown in fig. 8 and
attach end crimps to each core.
➤Connect the cable 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. 7, and fig. 9).
•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. 8 and Fig. 9
30
7
3459_4
1 current b
2 voltage b
3 voltage a
5
6
Pt 1000 / Pt 100
4 current a –8
4 to 20 mA + 7
Assembly/Installation
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr19

20 ProMinent®
Configuring the DMT
7Configuring the DMT
NOTE
Reconfiguration is only required if your process
requirements deviate from the general factory
settings (see section 7.5 General Settings)
Access the input menus using the change key , and then the
menu options with the enter key .
Overview of Menus
665,3
Ωcm
10.3 mA 25.3 °C
µS/cm
1512
10.3 mA 25.3 °C
cell const.= 1.000/cm
cond. = 1512 µS/cm
4 mA = 0.00 µS/cm
20 mA = 20.00 µS/cm
param. output
output: meas. value
4 mA: 0.00 µS/cm
20 mA: 20.00 µS/cm
param. measurement
cell const. = 1.000/cm
t. coeff. α= 2.00%/K
cell const.= 1.000/cm
t. coeff. α= 2.00%/K
calibration with CAL
cond. = 1512 µS/cm
param. temperature
input: sensor
unit: ˚C
probe connect. type
cell connect.: 2-wire
wire resist. RL = 4,5 Ω
unit: °C
offset = 0.00 °C
meas. val. = 21.00 °C
cell connect: 2-wire
wire resist. RL= 4,5 Ω
probe calibration
general settings
DMTAW091L10E0000
2.1.02
general settings
change
access code = 5000
free access
general settings
language
DMTAW091L10E0000
E = english
BA_DM_180_04_10_EN.p65 28.04.2010, 14:48 Uhr20