Endress+Hauser StamoSens CNM 750 User manual

BA 215C/07/en/02.02
51502551
valid from: Software version 3.0
StamoSens CNM 750 / CNS 70
System for
Online Nitrate Measurement
Operating Instructions

StamoSens CNM 750 / CNS 70
2Endress+Hauser

StamoSens CNM 750 / CNS 70
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning, operation . . . . . . 4
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Notes on safety conventions and icons . . . . . . 5
2 Identification . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . 6
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Certificates and approvals . . . . . . . . . . . . . . . 7
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Quick installation guide . . . . . . . . . . . . . . . . . . 8
3.2 Incoming acceptance, transport, storage . . . 8
3.3 Installation conditions . . . . . . . . . . . . . . . . . . . 9
3.4 Installation instructions . . . . . . . . . . . . . . . . . 10
3.5 Post-installation check . . . . . . . . . . . . . . . . . . 10
4 Electrical connection . . . . . . . . . . . . . 11
4.1 Terminal assignment . . . . . . . . . . . . . . . . . . . 11
4.2 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . 11
4.3 Cleaning unit . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Serial interface . . . . . . . . . . . . . . . . . . . . . . . . 13
4.5 Post-connection check . . . . . . . . . . . . . . . . . 14
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Display and operating elements . . . . . . . . . . 15
5.2 Local operation . . . . . . . . . . . . . . . . . . . . . . . 16
6 Commissioning . . . . . . . . . . . . . . . . . . 23
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . 27
7.1 Maintenance schedule . . . . . . . . . . . . . . . . . . 27
7.2 Cleaning agent . . . . . . . . . . . . . . . . . . . . . . . 27
7.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.4 Checking cables and connections . . . . . . . . 28
8 Troubleshooting . . . . . . . . . . . . . . . . . 29
8.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . 29
8.2 Replacement of device fuses . . . . . . . . . . . . 29
8.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9 Accessories . . . . . . . . . . . . . . . . . . . . . . 31
10 Technical data . . . . . . . . . . . . . . . . . . . . 35
10.1 CNM 750 Transmitter . . . . . . . . . . . . . . . . . . . 35
10.2 CNS 70 Sensor . . . . . . . . . . . . . . . . . . . . . . . . 36
10.3 Cleaning unit (optional) . . . . . . . . . . . . . . . . . . 37
11 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . 38
11.1 Operating matrix . . . . . . . . . . . . . . . . . . . . . . 38
11.2 Factory settings of sensors . . . . . . . . . . . . . . 40
11.3 Control for a customer-specific
cleaning unit . . . . . . . . . . . . . . . . . . . . . . . . . . 42

1 Safety instructions StamoSens CNM 750 / CNS 70
4Endress+Hauser
1 Safety instructions
1.1 Designated use
The StamoSens CNS 70 Sensor and the StamoSens CNM 750 Transmitter form an
analytical system for the continuous measurement of nitrate content. The system is
specifically designed to monitor the denitrification stage and discharge of a sewage
treatment plant.
Any other use than the one described here compromises the safety of persons and the
entire measuring system and is, therefore, not permitted.
The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Installation, commissioning, operation
Please note the following items:
•Installation, electrical connection, commissioning, operation and maintenance of
the measuring system must only be carried out by trained technical personnel.
The technical personnel must be authorised for the specified activities by the system
operator.
•Technical personnel must have read and understood these Operating Instructions
and must adhere to them.
•Before commissioning the entire measuring point, check all the connections for
correctness. Ensure that electrical cables and hose connections are not damaged.
•Do not operate damaged products and secure them against unintentional
commissioning. Mark the damaged product as being defective.
•Measuring point faults may only be rectified by authorised and specially trained
personnel.
•If faults can not be rectified, the products must be taken out of service and secured
against unintentional commissioning.
•Repairs not described in these Operating Instructions may only be carried out directly
by the manufacturer or by the Endress+Hauser service organisation.
1.3 Operational safety
The measuring system has been designed and tested according to the state of the art
and left the factory in perfect functioning order.
Relevant regulations and European standards have been met.
As the user, you are responsible for complying with the following safety
conditions:
•Installation instructions
•Local prevailing standards and regulations.

StamoSens CNM 750 / CNS 70 1 Safety instructions
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Immunity to interference
This instrument has been tested for electromagnetic compatibility according to
prevailing European standards for industrial applications. It is protected against
electromagnetic interference by the following design measures:
•cable screen
•interference suppression filter
•interference suppression capacitors.
Protection against interference as specified above is valid only for an instrument
connected according to the instructions in these Operating Instructions.
1.4 Return
If the measuring system has to be repaired, please send it cleaned to the
Endress+Hauser sales centre responsible. Please use the original packaging,
if possible.
Please enclose the completed Dangerous Goods sheet (copy the second last page of
these Operating instructions) with the packaging and also the shipping documents.
1.5 Notes on safety conventions and icons
General safety instructions
Electrical symbols
#
Warning!
This symbol alerts you to hazards. They can cause serious damage to the instrument or
to persons if ignored.
"
Caution!
This symbol alerts you to possible faults which could arise from incorrect operation.
They could cause damage to the instrument if ignored.
!
Note!
This symbol indicates important items of information.
%
Direct current
A terminal, at which there is direct current voltage or through which direct current flows.
&
Alternating current
A terminal, at which there is (sinusoidal) alternating voltage or through which alternating
current flows.
)
Ground connection
A grounded terminal that, from the user’s perspective, is already grounded via a
grounding system.
*
Protective earth connection
A terminal that has to be grounded before other connections can be made.

2 Identification StamoSens CNM 750 / CNS 70
6Endress+Hauser
2 Identification
2.1 Device designation
2.1.1 CNM 750Transmitter nameplate
2.1.2 CNS 70 Sensor nameplate
2.1.3 Product structure
StamoSens CNM 750Transmitter
Fig. 1: Example nameplate for CNM 750 Transmitter
Fig. 2: Example nameplate for CNS 70 sensor
Power supply
7 Power supply 80 ... 250 V AC
8 Power supply 24 V AC / DC
9 Special version acc. to customer’s specification
Communication / current output
A RS 232 and 0/4 ... 20 mA
Y Special version acc. to customer’s specification
Version
1 One-channel version
9 Special version acc. to customer’s specification
Additional equipment
A Quality certificate
Y Special version acc. to customer’s specification
CNM 750 complete order code

StamoSens CNM 750 / CNS 70 2 Identification
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StamoSens CNS 70Nitrate sensor
2.2 Scope of delivery
The scope of delivery comprises:
•1 StamoSens CNM 750 Transmitter (device type and version according to nameplate
→ Chap. 2.1.1)
•1 StamoSens CNS 70 Sensor (sensor type and version according to nameplate
→ Chap. 2.1.2)
•1 Quality Certificate
•1 215C/07/en Operating Instructions
2.3 Certificates and approvals
Declaration of conformity
The measuring system meets the legal requirements of the harmonised European
standards. Endress+Hauser confirms compliance with the standards by affixing the
4
symbol.
Quality certificate
Depending on the order code, you receive a quality certificate.
With the certificate, Endress+Hauser confirms compliance with all technical regulations
and the successful testing individually for your product.
Application
A Clear water application
B Activated sludge applications with cleaning unit 230 V
C Activated sludge applications with cleaning unit 115 V
Y Special version acc. to customer’s specification
Measuring range
4 Measuring range 0.2 ... 30 mg/l NO3-N
5 Measuring range 0.2 ... 60 mg/l NO3-N
9 Special version acc. to customer’s specification
Cable length
B7mcable
D 15 m cable
Y Special version acc. to customer’s specification
Version
1 Without assembly
2 2 m immersion tube and pendulum frame with 250 mm wall spacing
3 Seawater-resistant sensor version
9 Special version acc. to customer’s specification
Additional equipment
A Quality certificate
Y Special version acc. to customer’s specification
CNS 70 complete order code

3 Installation StamoSens CNM 750 / CNS 70
8Endress+Hauser
3 Installation
3.1 Quick installation guide
Fig. 3: Entire StamoSens CNM 750 / CNS 70 measuring system
➀: CNM 750 Transmitter
➁: Weather protection cover
➂: Compressor housing (only with cleaning unit)
➃: Upright post
➄: Power supply
➅: Signal outputs
➆: Immersion tube
➇: Pendulum frame
➈: Sensor CNS 70
➉: Cleaning unit

StamoSens CNM 750 / CNS 70 3 Installation
Endress+Hauser 9
3.2 Incoming acceptance, transport, storage
•Make sure the packaging is undamaged.
Inform the supplier about damage to the packaging.
Keep the damaged packaging until the matter has been settled.
•Make sure the contents are undamaged.
Inform the supplier about damage to the delivery contents.
Keep the damaged products until the matter has been settled.
•Check that the scope of delivery is complete and agrees with your order and the
shipping documents.
•The packaging material used to store or to transport the measuring system must
provide shock protection and humidity protection. The original packaging offers the
best protection. Also, keep to the approved ambient conditions (see Technical Data
→ Chap. 10).
•If you have any questions, please contact your supplier or
your Endress+Hauser sales centre responsible (see back page of these Operating
Instructions).
3.3 Installation conditions
3.3.1 Dimensions
Fig. 4: CNM 750Transmitter dimensions
➀: Front view
➁: Side view
➂: Top view with opened front lid
➃: Rear view

3 Installation StamoSens CNM 750 / CNS 70
10 Endress+Hauser
Fig. 5: CNS 70 Sensor dimensions and top view of the measuring area.
3.4 Installation
3.4.1 Installation instructions
!
Note!
•Select a measuring point where representative measurement can be taken.
Do not mount the sensor where medium flow is turbulent and fast-flowing.
•We recommend you to fit the transmitter with a weather protection cover (see
Accessories → Chap. 9).
•Attach the sensor to a special extension tube. Due to the weight of the sensor (approx.
5 kg), the sensor cable does not provide sufficient support.
Never carry the sensor by its cable.
•The best fixture is a damping support which holds the sensor vibration-free.
•Install the system at an easily accessible position to prevent danger arising for the
operating personnel (during commissioning or when carrying out maintenance and
cleaning work).
•Route all cable connections to prevent mechanical damage and interference from
other lines.
•Install measuring channels in the direction of flow to obtain a self-cleaning effect.
•The activated sludge version of the sensor is equipped with a cleaning unit which
prevents soiling or blocking due to particles by compressed air. For other applications
with soiling contents, the cleaning unit is available as an accessory.
•Install the air outflow of the cleaning unit at the narrow side of the light slit.
3.5 Post-installation check
•After mounting, check that all connections are secure and leak-tight.
•Check that the sensor is secured such that it is free of vibration and tension.
•Check whether all cables have been routed without damage or electromagnetic
interference.

StamoSens CNM 750 / CNS 70 4 Electrical connection
Endress+Hauser 11
4 Electrical connection
4.1 Terminal assignment
Fig. 6: Electrical connection for CNM 750 Transmitter with 80-250 V AC power supply
Fig. 7: Electrical connection for CNM 750 Transmitter with 24 V DC/AC power supply
!
Note!
The two-channel version ("Duo-Version") is not available for the CNM 750 Transmitter.
#
Warning!
•Ensure before connection that the mains voltage corresponds with the voltage
specified on the nameplate.
•A clearly marked mains disconnecting device must be installed in the vicinity of the
instrument.
•Protect the transmitter by a 1 A fuse.
•Only switch the transmitter on when the sensor connector is plugged in
and secured.
•Only plug in or remove the sensor connector when the transmitter is switched off.
4.2 Inputs and outputs
4.2.1 Control input (+24V)
!
Note!
Use Ua (+24V, terminal 26) to control the 24V DC "INPUT". Then connect terminal 27
(0V) and terminal 24 (0V).
Output Terminals Function
24 V DC "INPUT" 24 / 25 Hold function, i.e. measurement is interrupted and the
current value in the display is frozen

4 Electrical connection StamoSens CNM 750 / CNS 70
12 Endress+Hauser
4.2.2 Signal outputs (switch contacts)
4.2.3 Analog output (I-1)
4.3 Cleaning unit
The cleaning unit is connected to the mains supply. The CNM 750 Transmitter is
connected to the cleaning unit according to the following table:
#
Warning!
Disconnect the device from the mains before opening it. The connection contacts are
live even when the transmitter is switched off.
Output Terminals Description
Alarm 1 7 / 8 / 9 Switches when alarm value 1 is exceeded or undershot
Alarm 2 4 / 5 / 6 Switches when alarm value 2 is exceeded or undershot
Hold 10 / 11 / 12 Measurement interrupted, values held
Fault 13 / 14 / 15 Error message can be retrieved via operating menu
Cleaning 16 / 17 / 18 Switch contact to clean sensor
Output Terminals Description
Sensor 1
0/4 mA
20 mA
31 / 32 / 33
Measurement range start
Measurement range end
Terminal CNM 750 Cleaning unit terminal Function
3 (
) )PE Grounding for housing
1 (L) L1 Conductor
2 (N) N Zero conductor
16 1 Fuse
18 2

StamoSens CNM 750 / CNS 70 4 Electrical connection
Endress+Hauser 13
Fig. 8: Cleaning unit connection
4.4 Serial interface
!
Note!
The serial interface is only available for service purposes.
Configure the PC as follows:
•Software protocol: 9600 Baud, N (= no parity), 8 Data bits, 1 Stop bit
•Output format: ASCII. For a data transfer, the PC must send the ASCII code "81" (hex
51, "Q" = Question).
PE L1 N PE
T
1A
Fuse
CNM 750
1
230V AC / 50Hz
or
115V AC / 60Hz
C07-CXM750xx-04-00-00-en-001.EPS
L
1
16
N2
3
18
RS 232-0 of CNM 750 Transmitter COM 1 / 2 on PC
Terminal SUB-D
9-pin Function Function SUB-D 9-pin SUB-D 25-pin
23 3 TxD RxD 2 3
22 2 RxD TxD 3 2
21 8 CTS RTS 7 4
CTS 8 5
20 5 GND GND 5 7

4 Electrical connection StamoSens CNM 750 / CNS 70
14 Endress+Hauser
4.5 Post-connection check
Carry out the following checks after electrical connection of the measuring system:
Device status and specifications Note
Is the measuring device or cable externally undamaged? Visual inspection
Electrical connection Note
Does the supply voltage correspond to the data on the nameplate? 80 ... 250 V AC
24 V AC / DC
Do the cables used meet the required specifications? Use original E+H cables for
connecting the sensor
see Accessories → Chap. 9
Are the mounted cables relieved of tension?
Cable type properly disconnected? Guide power supply and signal
lines separate over the entire
travel distance, so that no
interference can take place.
Separate cable channels are
ideal.
Cable routing without scuffing or cross-overs?
Are power supply and signal cables connected correctly according
to wiring diagram?
Are all screw terminals tightened?
Are all cable entries mounted, tightened and leak-resistant?
Is the sensor connector tightened?
Is the transmitter protected with a fuse? For fuse specification, see
Technical Data → Chap. 10
Is a mains disconnecting device available?

StamoSens CNM 750 / CNS 70 5 Operation
Endress+Hauser 15
5Operation
5.1 Display and operating elements
5.1.1 Display
Fig. 9: CNM 750 Transmitter’s operating panel
➀: LED display (measured value display)
➁: LC display (status display)
➂: Operating keys
➃: Indicator LEDs
➄: Mains switch
5.1.2 Key assignment
The operating keys and the integrated indicator LEDs have the following functions:
Key Key function Indicator LED function
H
–Main menu measurement Alarm value 1 exceeded
K
–Backwards in the sub-menu Alarm value 2 exceeded
V
–Backwards in the main menu
–Increase numerical value in the sub-menu
–Start cleaning in the service menu
Measuring range exceeded
W
–Forwards in the main menu
–Reduce numerical value in the sub-menu
–Stop cleaning in the service menu
Measuring range undershot
F
–Confirm main menu options
–Forwards in the sub-menu
–Confirm numerical values and parameters
–Switch over display during measuring mode
Error message
J
–Change correction factors
–Start single measurement in the service menu
Cleaning active

5 Operation StamoSens CNM 750 / CNS 70
16 Endress+Hauser
5.2 Local operation
5.2.1 Main menu
Access the main menu by holding down the H key, until "MEASUREMENT" is displayed.
The main menu options contain the following fields:
Option LC display Info
MEASUREMENT
•Acquiring and displaying
–the sensor signal
–the analog current
–the sensor frequency
•Setting the alarm value switches
•Displaying error messages
PARAMETER ENTRY
Setting the default values for
–Measuring ranges
–Alarm values
–Cleaning
CALIBRATION
POINTS Defining the number of calibration points
NITRATE INPUT Allocating the concentration values to the
calibration measuring points
FREQUENCY Allocating the frequencies to the measuring points
from the calibration
CONFIGURATION
Setting the default values for
–Sensor type
–Unit of measure
–Correction factor
–Analog output
–Alarm values
–Fault message
–Date, time
LANGUAGE Selecting menu language
DIAGNOSTICS Displaying error messages
SERVICE Manual measurement using a flash for service and
test purposes
DATA MEMORY
Last 340 measured values with the time of their
storage.
Only for service purposes.

StamoSens CNM 750 / CNS 70 5 Operation
Endress+Hauser 17
5.2.2 "MEASUREMENT" Menu
Option Display Range of adjustment
Factory settings (bold) Info
MEASUREMENT
•Acquiring and displaying
–the sensor signal
–the analog current
–the sensor frequency
•Setting the alarm value switches
•Displaying error messages
Measured value
mg/l
mg/l-N
1/m SAK*
mg/l DOC*
mg/l TOC*
mg/l BSB*
mg/l CSB*
Displays the unit depending on the sensor type selected in
the CONFIGURATION menu
Those units marked with * are only available with the CSS
70 Sensor.
With the
F key, you can switch between the measured
value, analog output and measuring frequency during
measuring operation.
Analog output 4.00 mA
20.0 mA
Displays the current value corresponding to the measured
value
Measuring frequency 0 ... 5965 Hz Displays the measuring frequency depending on the
sensor type selected in the CONFIGURATION menu
LED display
For the first measurement, adjacent displays appear after switching-on.
Alternatively, an error situation can also occur after previous normal operation. Then go
into the DIAGNOSTICS menu (s. Chap. 5.2.9) to access the error messages.
LC display

5 Operation StamoSens CNM 750 / CNS 70
18 Endress+Hauser
5.2.3 "PARAMETER ENTRY" Menu
!
Note!
Some settings that can be made in the "CONFIGURATION" menu affect the defaults in
the "PARAMETER ENTRY" menu. In view of this, complete the "CONFIGURATION" menu
first during initial start-up (s. Chap. 6.2).
Option Display Range of adjustment
Factory settings (bold) Info
PARAMETER ENTRY
Setting the default values for
–Measuring ranges
–Alarm values
–Cleaning
Measuring range-start 0.00 ... 60.0 mg/l-N
0.20 mg/l-N
Selectable concentration range within a calibration curve
assigned as a linear function to the analog output.
The displays (LED and LC) only show measured values
which are greater than half the measuring range start and
smaller than double the measuring range end. Measuring
range start and end also form an input limit for alarm
values.
Factory settings for the measuring ranges depending on
sensor type selected in the CONFIGURATION menu
Measuring range-end 0.00 ... 60.0 mg/l-N
30.0 mg/l-N
Alarm value A 0.20 ... 60.0 mg/l-N
12.0 mg/l-N Concentration switching values for the alarm relays. The
switch hysteresis is 2% in each case.
Factory settings for the alarm values depending on sensor
type selected in the CONFIGURATION menu
Alarm value B 0.20 ... 60.0 mg/l-N
25.0 mg/l-N
Signal filter 0 ... 100
10
The signal filter indicates the number of light flashes per
single measurement for obtaining the arithmetic mean of
the sensor signal corresponding to the concentration value.
1st measurement
01.01.00 - 31.12.99
00:00 - 23:59
01.01.99 00:00h
Time of the 1st measurement (DD.MM.YY, time hh:mm).
After every change the instrument does not wait for the
measuring interval. If the measurement is to start
immediately, set the time in the past (01.01.96 at the
earliest).
Measuring interval 0 ... 120 min
0 min
Time between two measurements. If a measuring interval =
0 min is selected, the sensor performs a measurement and
starts a new measurement immediately after the current
measurement ends.
Cleansing interval 0 ... 720 min
1 min
Factory settings for the cleansing intervals depending on
sensor type selected in the CONFIGURATION menu. If a
cleansing interval = 1 min is selected, cleaning is done
after each measurement. Cleansing interval = 0 means
cleaning is switched off.
Cleansing period 1 ... 600 s
15 s Factory settings for the cleansing period depending on sensor type selected in the CONFIGURATION menu
Range start
0.20 mg/l
Range end
30.0 mg/l-N
Alarm A setpoint
12.0 mg/l-N

StamoSens CNM 750 / CNS 70 5 Operation
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5.2.4 "CALIBRATION POINTS" Menu
5.2.5 "NITRATE INPUT" Menu
5.2.6 "FREQUENCY" Menu
Option Display Range of adjustment
Factory settings (bold) Info
CALIBRATION
POINTS Defining the number of calibration points
Code number 0 ... 99
0
To access the sub-menu, enter the code "99". If the
incorrect code is entered, the program exits to the
"MEASUREMENT" main menu.
Number of
measuring points
1 ... 7
1
Number of calibration points that should be used to form
the calibration characteristic curve. The device is pre-
calibrated before shipment.
Option Display Range of adjustment
Factory settings (bold) Info
NITRATE INPUT Allocating the concentration values to the calibration
measuring points
Code number 0 ... 99
0
To access the sub-menu, enter the code "99". If the
incorrect code is entered, the program exits to the
"MEASUREMENT" main menu.
Enter the
measuring point
1 ... 7
1Allocating the concentration values from the calibration for the subsequent frequency input.
Option Display Range of adjustment
Factory settings (bold) Info
FREQUENCY Allocating the frequencies to the measuring points from the
calibration
Code number 0 ... 99
0
To access the sub-menu, enter the code "99". If the
incorrect code is entered, the program exits to the
"MEASUREMENT" main menu.
FREQUENCY 0 ... 5965 Hz
5312
Entering the measuring frequency for the measuring points
from the calibration.
Factory settings for the measuring frequency depending on
sensor type selected in the CONFIGURATION menu

5 Operation StamoSens CNM 750 / CNS 70
20 Endress+Hauser
5.2.7 "CONFIGURATION" Menu
!
Note!
Some settings that can be made in this menu affect the defaults in the "PARAMETER
ENTRY" menu. In view of this, complete the "CONFIGURATION" menu first during initial
start-up (s. Chap. 6.2).
Option Display Range of adjustment
Factory settings (bold) Info
CONFIGURATION
Setting the default values for
–Sensor type
–Unit of measure
–Correction factor
–Analog output
–Alarm values
–Fault message
–Date, time
Code number 0 ... 99
0
To access the sub-menu, enter the code "99". If the
incorrect code is entered, the program exits to the
"MEASUREMENT" main menu.
Sensor type
NOx AS 0-30
NOx CW 0-60
SAK 0-50*
SAK 0-700*
NOx AS 20-50*
NOx AS 0-25*
NOx CW 20-50*
NOx CW 0-25*
Selection of your chosen CNS 70 Sensor type.
Selection of the sensor type is checked for plausibility, i.e.
whether the selected sensor is identical to the connected
sensor.
AS = activated sludge application
CW = Clear water application
Those sensor types marked with * are only available with
the CSS 70 Sensor.
Unit of measure
mg/l (= NO3)
mg/l-N (= NO3-N)
1/m SAK*
mg/l DOC*
mg/l TOC*
mg/l BSB*
mg/l CSB*
Selection of unit of measure.
Those units of measure marked with * are only available for
CSS 70 Sensor operation.
Default setup yes
no
Selecting "Default setup" loads the sensor default
parameters. With this, the sensor is immediately ready for
measurement, without having to carry out an adaptation.
For a summary of the sensor's factory settings, see →
Chap. 11.2.
! Note: If you load the Factory Setting, the previous
values stored are overwritten.
Correction factor -25...+25%
0%
Linear correction factor of calibration curve at low
fluctuation of waste water composition. Automatically set to
"0" when factory setting is selected.
Mean value 1-20
10
Number of individual measured values that are used for
calculating the arithmetic mean before the measured value
is displayed. This function is used for smoothing the daily
curve.
Analog output 0-20 mA
4-20 mA Selection of the current range, on which the measuring range should be mapped.
n mean value
10
Analog output
4-20 mA