Endress+Hauser StamoSens CNM 750 User manual

BA215C/07/en/07.04
51502551
Valid of:
Software version 3.0
Operating Instructions
Stamosens CNM750/CNS70
Nitrate analysis system

Endress+Hauser
Brief overview
This explains how to use these Operating Instructions to commission your system quickly and
safely:
Safety instructions
→Seite 4
→Seite 5
General safety instructions
Explanation of the warning symbols
You can find special instructions at the appropriate position in the chapter in question. The
positions are indicated with the icons Warning #, Caution "and Note !
▼
Installation
→Seite 9
→Seite 11
Here, you can find information on installation conditions and the dimensions of transmitter and
sensor.
You can find information on how to install the device on this page.
▼
Wiring
→Seite 12
→Seite 14
→Seite 38
Here, you can see the terminal assignment and the output configurations.
How to install the cleaning unit is what you read on this page.
In chapter "Appendix", you can find examples for the connection of customer-specific cleaning
units.
▼
Commissioning
→Seite 16
→Seite 23
In chapter "Operation", you read all about operating elements and setting options.
In chapter "Commissioning", you can find the working steps for the first commisioning and
calibration.
▼
Maintenance
→Seite 26 You should carry out maintenance work to ensure perfect functionality. Here, you can find the
maintenance schedule.
▼
Accessories
→Seite 28 You can find all accessories and the ordering information here.
▼
Troubleshooting
→Seite 32 Use the check list to find the causes for troubles with the measuring system.
▼
▼
Index
→Seite 40 You can find important index terms here. Use the index to find out information quickly.

Stamosens CNM750/CNS70
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Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning and operation . . . . . . . . 4
1.3 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Notes on safety icons and symbols . . . . . . . . . . . . . . 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 Measuring system overview . . . . . . . . . . . . . . . . . . . 8
3.2 Incoming acceptance, transport, storage . . . . . . . . . . 8
3.3 Installation conditions . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Installation instructions . . . . . . . . . . . . . . . . . . . . . 11
3.5 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 11
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Cleaning unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.5 Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 15
5 Operation . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Display and operating elements . . . . . . . . . . . . . . . 16
5.2 Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Commissioning. . . . . . . . . . . . . . . . . . 23
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Switch-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Maintenance. . . . . . . . . . . . . . . . . . . . 26
7.1 Maintenance schedule . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Cleaning agents . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Checking cables and connections . . . . . . . . . . . . . . 27
8 Accessories. . . . . . . . . . . . . . . . . . . . . 28
9 Troubleshooting . . . . . . . . . . . . . . . . . 32
9.1 System error messages . . . . . . . . . . . . . . . . . . . . . . 32
9.2 Replacing the device fuse . . . . . . . . . . . . . . . . . . . . 32
9.3 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10 Technical data . . . . . . . . . . . . . . . . . . . 34
10.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.2 Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.3 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.4 Performance characteristics . . . . . . . . . . . . . . . . . . 34
10.5 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.6 Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.7 Mechanical construction . . . . . . . . . . . . . . . . . . . . 35
11 Appendix. . . . . . . . . . . . . . . . . . . . . . . 36
11.1 Operating matrix . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.2 Control for a customer-specific cleaning unit . . . . . 38
Index . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Safety instructions Stamosens CNM750/CNS70
4Endress+Hauser
1 Safety instructions
1.1 Designated use
Sensor CNS70 and transmitter CNM 750 form an analytical system for the continuous
measurement of nitrate content.
The system is specifically designed to monitor:
• the denitrification stage
• the discharge of a sewage treatment plant
• drinking water treatment.
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 and operation
Please note the following items:
• Installation, 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.
• Electrical connection must only be carried out by a certified electrician.
• 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 at the
manufacturer’s or by the service organisation.

Stamosens CNM750/CNS70 Safety instructions
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1.3 Operational safety
The analyser 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.
Immunity to interference
This instrument has been tested for electromagnetic compatibility in industrial use according to
applicable European standards. It is protected against electromagnetic interference by the following
design measures:
• cable screening
• 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 sensor or the transmitter has to be repaired, please return it cleaned to the sales centre
responsible. Please use the original packaging, if possible.
Please enclose the completed "Declaration of contamination" (copy the second last page of these
Operating Instructions) with the packaging and the transportation documents.
No repair without completed "Declaration of contamination"!
1.5 Notes on safety icons and 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.

Identification Stamosens CNM750/CNS70
6Endress+Hauser
2 Identification
2.1 Device designation
2.1.1 Nameplate
Please, check the order code from the nameplate with the product structure and with your order.
2.1.2 Product structure
Transmitter
a0000982
Fig. 1: Nameplate of the transmitter (example)
a0000983
Fig. 2: Nameplate of the sensor (example)
Power supply
7 80 ... 250 V AC
824VAC/DC
9 Special version acc. to customers specification
Communication / Output
A RS 232 + 0/4 ... 20 mA
Y Special version acc. to customers specification
Version
1 One channel version
9 Special version acc. to customers specification
Additional equipment
A Quality certificate
Y Special version acc. to customers specification
CNM 750 - complete order code
order code / Best.Nr.:
serial no. / Ser.-Nr.:
prot. class / Schutzart:
ambient temp. / Umgebungstemp.:
output 1 / Ausgang 1:
output 2 / Ausgang 2:
mains / Netz:
CNM 750-7A1A
410065C3NI1
0/4-20mA, RS 232
–
80-250V AC, 50/60Hz, 15VA
IP 54
–10°C...+55°C
Stamosens CNM750
order code / Best.Nr.:
serial no. / Ser.-Nr.:
measuring range / Messbereich:
CNS70-C4B2A
4100A5C3NI0
BS 0.2-30mg/l NO3-N
Stamosens CNS70

Stamosens CNM750/CNS70 Identification
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Sensor
2.2 Scope of delivery
The scope of delivery comprises:
• a transmitter (device type and version acc. to the nameplate)
• a sensor (sensor type and version acc. to the nameplate)
• a quality certificate
• Operating Instructions (English).
2.3 Certificates and approvals
2.3.1 4approval
Declaration of conformity
The product meets the legal requirements of the harmonised European standards.
The manufacturer confirms compliance with the standards by affixing the 4symbol.
2.3.2 Manufacturer certificate
Quality certificate
With the certificate the manufacturer confirms compliance with all technical regulations and the
successful testing individually for your product.
Cleaning unit
A Without
B 230 V
C 115 V
Y Special version acc. to customers specification
Measuring range
4 0.2 ... 30 mg/l NO3-N (activated sludge)
5 0.2 ... 60 mg/l NO3-N (clear water)
9 Special version acc. to customers specification
Cable length
A2m
B7m
C5m
D15m
Y Special version acc. to customers specification
Version
1 Without assembly
3Seawaterversion
4 Immersion assembly 2 m, 90° offset + pendulum frame w. 250 mm wall spacing
9 Special version acc. to customers specification
Additional equipment
A Quality certificate
Y Special version acc. to customers specification
CNS70 - complete order code

Installation Stamosens CNM750/CNS70
8Endress+Hauser
3 Installation
3.1 Measuring system overview
A complete measuring system comprises:
• a CNM750 transmitter
• a CNS70 sensor
• an immersion assembly with pendulum frame
Optional:
• Cleaning unit with compressor
• Mounting post and weather protection cover
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.
a0000954
Fig. 3: Complete measuring system
1
2
3
4
5
6
7
8
9
10
Transmitter CNM750
Weather protection cover
Compressor housing (optional, only
with cleaning unit)
Mounting post
Power supply
Signal output
Immersion assembly
Pendulum frame
Sensor CNS70
Cleaning unit (optional)
M CE EK
POWER
ON
OFF
1
2
3
4
5
6
7
8
9
10

Stamosens CNM750/CNS70 Installation
Endress+Hauser 9
• The packaging material used to store or to transport the product must provide shock protection
and humidity protection. The original packaging offers the best protection. Also, keep to the
approved ambient conditions (see "Technical data").
• If you have any questions, please contact your supplier or your sales centre responsible.
3.3 Installation conditions
3.3.1 Design, dimensions
a0000949-en
Abb. 4: Transmitter dimensions
a0000950-en
Abb. 5: Sensor dimensions
241/9.49
198/7.80
329 / 12.95 185 / 7.28
60 / 2.36
60/2.36
69/2.72
26 / 1.02
145 / 5.79
15 / 0.59
212/8.35
198 / 7.80
145 / 5.71
15 / 0.59
115/4.53
mm / inch
Ø127/5.0
G1½
360 / 14.17
mm / inch

Installation Stamosens CNM750/CNS70
10 Endress+Hauser
3.3.2 Sensor holders
"Caution!
Do not install the sensor suspended from the cable. Use a wall bracket or an immersion assembly
with pendulum frame for sensor mounting.
a0000927-en
Fig. 6: Wall bracket for sensor
a0000904-en
Fig. 7: Immersion assembly for sensor
a0000903-en
Fig. 8: Pendelum frame for immersion assembly
200 / 7.87
100 / 3.94
15 / 0.59
120 / 4.72 154 / 6.06
70 / 2.76 88 / 3.43
25/
0.98
15 / 0.59
Ø7 x14 / 0.28x0.55
Ø128 / 5.04
mm/inch
45°
50 /
1.97
55/2.17
R11/2
65/
2.56
2000 / 78.74
Ø 40 / 1.57
mm/inch
130/5.12
130/5.12
258/10.16
250/9.84
Ø 11/0.43

Stamosens CNM750/CNS70 Installation
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3.3.3 Weather protection cover and round post mount
3.4 Installation instructions
• 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 to fit the transmitter with a weather protection cover (see "Accessories").
• 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 pendulum frame which holds the sensor vibration-free.
• Install the system at an easily accessible position to prevent danger 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 of the sensor 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 installation, check that all connections are fitted tightly and are leakage resistant.
• 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.
a0000928-en
Fig. 9: Weather protection cover CYY 101
a0000929-en
Fig. 10: Round post mount CYY 102
270 / 10.63
320 / 12.60
300 / 11.81
mm / inch
150 / 5.91
120 / 4.72
450 / 17.72
950 / 37.40
1500 / 59.06
4 x Ø12 / 0.47
mm / inch

Wiring Stamosens CNM750/CNS70
12 Endress+Hauser
4 Wiring
4.1 Electrical connection
#Warning!
• The electrical connection must only be carried out by a certified electrician.
• Technical personnel must have read and understood the instructions in this manual and must
adhere to them.
• Ensure that there is no voltage at the power cable before beginning the connection work.
4.2 Terminal assignment
#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.
a0000952
Fig. 11: Electrical connection transmitter with power supply 80 ... 250 V AC
a0000953
Fig. 12: Electrical connection transmitter with power supply 24 V AC/DC
Relais: Load/Last max. 250V~/2A, 30V=/1A
Supply / Netz:
80-250 V~
L
14101619
Shield/
Schirm
NO
NC
COM
713
Alarm 1/
GW 1
Hold
Error/
Störung
Cleaning/
Reinigung
Input /
Eingang
Output /
Ausgang
RS232 Alarm 2/
GW 2
N25111720 GND
22 RxD
814
36121821 CTS
23 TxD
915
T 500 mA
F1
Klemmen führen auch bei ausgeschaltetem Gerät Spannung !!!
51509157 Terminals voltage to ground even when the unit is switched off !!!
Sensor 1
+
-
24
2831
I1 I2
24V DC / 100mA
25
2932
27
+24V
+24V
26
0V
0V
3033
0/4-20 mA
Shield/
Schirm
Duo-
Version:
Sensor 2
+
-
Relais: Load/Last max. 250V~/2A, 30V=/1A
14101619
Shield/
Schirm
NO
NC
COM
713
Alarm 1/
GW 1
Hold
Error/
Störung
Cleaning/
Reinigung
Input /
Eingang
Output /
Ausgang
RS232 Alarm 2/
GW 2
25111720 GND
22 RxD
814
36121821 CTS
23 TxD
915 F1
51509391
Sensor 1
+
-
24
2831
I1 I2
24V DC / 100mA
25
2932
27
+24V
+24V
26
0V
0V
3033
0/4-20 mA
Shield/
Schirm
Duo-
Version:
Sensor 2
+
-
Supply voltage only 24V DC/AC !!!
Versorgungsspannung nur 24V DC/AC !!!
T2A
L
L
+
-

Stamosens CNM750/CNS70 Wiring
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4.3 Inputs and outputs
4.3.1 Control input (+24 V)
!Note!
Use Ua(+24 V, terminal 26) to control the 24 V DC "INPUT". Then connect terminal 27 (0 V) and
terminal 24 (0 V).
4.3.2 Signal output
!Note!
Switching contacts are designed for low voltage 30 V DC / 1 A or mains voltage 230 V AC / 2 A.
4.3.3 Analog output (I-1)
Input Terminals Function
24 V DC "INPUT" 24 / 25 Hold function, i.e. measurement is interrupted and the current
value in the display is frozen
Output terminals Function
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 Function
Sensor 1
0/4 mA
20 mA
31 / 32 / 33
Measuring range start
Measuring range end

Wiring Stamosens CNM750/CNS70
14 Endress+Hauser
4.4 Cleaning unit
The cleaning unit is connected to the mains supply. The 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.
a0000951-en
Fig. 13: Connection of the cleaning unit
Transmitter terminal Cleaning unit terminal Function
3 ()) PE Grounding for housing
1 (L) L1 Conductor
2 (N) N Zero conductor
16 1 Fuse
18 2
PE L1 N PE
T
1A
Transmitter
1
230V AC / 50Hz
115V AC / 60Hz
L
1
16
N2
3
18
Fuse
or

Stamosens CNM750/CNS70 Wiring
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4.5 Serial interface
!Note!
• You need a zero modem cable (not a crossed).
• The interface configuration at the transmitter side is not necessary.
4.6 Post-connection check
RS 232 of the transmitter COM 1/2 at PC
Terminal SUB-D, 9-pin Function Function SUB-D, 9-pin
23 3 TxD RxD 2
22 2 RxD TxD 3
21 8 CTS RTS 7
CTS 8
20 5 GND GND 5
Software protocol: 9600, N, 8, 1
Output format: ASCII
Device status and specifications Note
Is the transmitter or cable externally undamaged? Visual inspection
Electrical connection Note
Does the supply voltage correspond to the data on the nameplate? 230 V AC / 50 Hz 115 V AC / 60 Hz
Are current outputs screened and connected?
Are the mounted cables relieved of tension?
Cable type properly disconnected? Guide power supply and signal lines
separately over the entire travel distance.
Separate cable channels are ideal.
Cable routing without scuffing or cross-overs?
Are power supply and signal lines connected correctly according to wiring
diagram?
Are all screw terminals tightened?
Are all cable entries mounted, tightened and leak-resistant?
Transmitter protected by a fuse? For specification see "Technical data"
Is a mains disconnecting device available?

Operation Stamosens CNM750/CNS70
16 Endress+Hauser
5Operation
5.1 Display and operating elements
a0000948-en
Fig. 14: Display and operating elements
1LED(measuredvalue)
2 LC display (status)
3Operatingkeys
4 Indicator LEDs
5 Mains switch
5.2 Local operation
The operating keys and the integrated indicator LEDs have the following functions:
M CE E K
ON
OFF
POWER
1
45
3
2
Meas. value
18.0 mg/l-N
Key Key function Indicator LED function
H– “Auto measuring” option
– back to the main menu from all sub-menus
Alarm value 1 exceeded
K– backwards in the sub-menu
(horizontal, see Appendix,)
Alarm value 2 exceeded
V– backwards in the main menu (vertical)
–increasevalue
Measuring range exceeded
W– forwards in the main menu (vertical)
– reduce value
Measuring range undershot
F– select option
– adopt value, forwards in the sub-menu (horizontal)
Retrieve error message
J– selection in the sub-menu Unassigned

Stamosens CNM750/CNS70 Operation
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5.2.1 Main menu
Access the main menu by holding down the Hkey until “MEASURING” is displayed.
For the main menu options and information about them, please see the following table.
Selection Display Info
MEASURING
• Acquiring and displaying:
–thesensorsignal
– 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:
•Sensortype
•Measuringunit
• Correction factor
• Analog output
• Alarm values
• Error 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.
MEASUREMENT
PARAMETER ENTRY
CALIBRATION PTS
NITRATE INPUT
FREQUENCY
CONFIGURATION
LANGUAGE
DIAGNOSTICS
SERVICE
DATA MEMORY

Operation Stamosens CNM750/CNS70
18 Endress+Hauser
5.2.2 MEASUREMENT
!Note!
In the following table and in the tables in the next chapter, example images can be found for each
option under "Display". In addition to the numerical values, the parameter is also displayed in some
options. This is not shown in the images. Moreover, individual numerical values in the images can
differ from the actual settings.
The actual factory settings can in any case be found in column 2 "Range of adjustment / Factory
settings" in bold.
Option Setting range
(factory settings bold)
Display Info
Measured value mg/l
mg/l-N
Displays the unit depending on the sensor type selected in
the CONFIGURATION menu.
With the Fkey, 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 to access the error messages.
LC display
18.0 mg/l-N
Measured value
4-20 mA
Analog output
5Hz
Frequency
–
––––
– – – –
Meas. value
----

Stamosens CNM750/CNS70 Operation
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5.2.3 CONFIGURATION
!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.
Option Setting range
(factory settings bold)
Display Info
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
Selection of your chosen sensor type. Selection is checked
for plausibility, i.e. whether the selected sensor is
identical to the connected sensor.
AS = activated sludge application
CW = clear water application
Measuring unit mg/l
mg/l-N
Default setup
= factory setting
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.
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.
Alarm value A
NC current
NO current
Setting the relay as NO or NC contact
!Note!
Changes to this setting will only be activated after
switching the transmitter on and off.
Alarm value B
Diagnostic alarm
Date /time 01.01.00 00:00... 31.12.99 23:59 You set up date and time during the first commissioning.
0
Code No.
NOx BS 0-30
Type of sensor
mg/l-N
Unit of measure
0%
Correct. factor
10
n mean value
4-20 mA
Analog output
Alarm B
normally open
Diagnostic alarm
normally open
10.02.02. 11:38
act. Date/Time

Operation Stamosens CNM750/CNS70
20 Endress+Hauser
5.2.4 PARAMETER ENTRY
5.2.5 CALIBRATION POINTS
5.2.6 NITRATE INPUT
Option Setting range
(factory settings bold)
Display Info
Measuring range
start
0.00 ... 60 mg/l
0.20 mg/l
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.
Measuring range
end
0.00 ... 60 mg/l
30.0 mg/l
Alarm value A 0.20 ... 60 mg/l
12.0 mg/l
Concentration switching values for the alarm relays. The
switch hysteresis is 2% in each case.
Alarm value B 0.20 ... 60 mg/l
25.0 mg/l
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 00:00... 31.12.99 23:59
01.01.99 00:00
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
Time between two measurements.
If a measuring interval = 0 min is selected, the sensor
performs measurements without breaks.
Cleaning interval 0 ... 720 h
1 h Cleaning interval = 0 means cleaning is switched off.
Cleaning period 0 ... 600 s
15 s
0.20 mg/l-N
Range start
30.0 mg/l-N
Range end
12.0 mg/l-N
Alarm A setpoint
25.0 mg/l-N
Alarm B setpoint
10
Signal filter
01.01.99 00:00
1. Measurement
0min
Meas. interval
1min
Clean. interval
15 s
Cleansing period
Option Setting range
(factory settings bold)
Display Info
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.
0
Code No.
1
No. of points
Option Setting range
(factory settings bold)
Display Info
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.
1st measured value 1 ... 7
1
Concentration value of the calibration measuring point to
be allocated to the subsequent frequency.
0
Code No.
1. Value
5.00 mg/l-N