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