Quality made byEndress+Hauser
ISO 9001
Technical InformationTI 215C/07/en/09.0251502579
Online Nitrate DeterminationStamoSens CNM 750 / CNS 70
Photometric analysis system for the determination of nitrate in the denitrification step and in the outlet of wastewater treatment plants
Application
• Monitoring of nitrate content in the outlet of wastewater treatment plants
• Monitoring and optimising denitrification processes
Your benefits
• Economy-priced and ecological measuring process
• No sample taking or conditioning system required
• No chemicals required• Service friendly design• Very short response time• In-situ calibration• Measured value preparation in the
sensor, therefore low interference susceptibility on signal transfer
• Measured values stored by data logger
StamoSens CNM 750 / CNS 70
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Function and system design
Measuring principle The sensor light source transmits an ultraviolet light beam through the medium. The transmission light is diverted by means of an optical system consisting of mirrors and lenses. The received light is measured by a photodiode. The part of light absorbed by the medium is proportional to the concentration of the measured value (see input).Additionally, a reference beam is measured to compensate interference due to suspended solids and organic substances .
Measuring system A complete measuring system comprises:• a transmitter CNM 750• a sensor CNS 70• an immersion assembly with pendulum frame
Optionally:• Cleaning unit with compressor• Mounting post and weather protection cover
Co7-CXM750xx-14-08-00-xx-001.eps
Complete measuring system
123
45678910
Transmitter CNM 750Weather protection coverCompressor housing (optionally, only with cleaning unit)Mounting postPower supplySignal outputImmersion assemblyPendulum frameSensor CNS 70Cleaning unit (optionally)
M CE E KPOWER
ON
OFF
ENDRESS+HAUSERSTAMOSENS➀
➁
➂
➃
➄➅ ➆
➇
➈➉
StamoSens CNM 750 / CNS 70
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Input
Measured variable NO3-N [mg/l], NO3 [mg/l]
Measuring range
Wavelength Nitrate absorbance maximum
Output
Output signal 0/4 ... 20 mA, galvanically separated
Signal on alarm 2 limit contact, 1 alarm contact
Contact switching power 230 V AC / 3 A, 30 V DC / 1 A
Load max. 500 Ω
Data interface RS 232 C, slot for bus extension
Power supply
Electrical connection
C07-CXM750xx-04-00-00-a2-001.eps
Electrical connection transmitter with power supply 80 ... 250 V AC
C07-CXM750xx-04-00-00-a2-002.eps
Electrical connection transmitter with power supply 24 V AC/DC
Supply voltage 80 ... 250 V AC ±10%, 50/60 Hz24 V AC/DC
Power consumption max. 15 VA
Clear water 0.2 ... 60 mg/l NO3-N bzw. 0 ... 260 mg/l NO3Activated sludge 0.2 ... 30 mg/l NO3-N bzw. 0 ... 130 mg/l NO3
StamoSens CNM 750 / CNS 70
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Connection of the cleaning unit
C07-<CXM750xx-04-00-00-de-001.eps
Connection of the cleaning unit
Performance characteristics
Response time t90 ≥ 60 s, selectable
Maximum measured error ± 2 % of upper range value
Repeatability 0,5 % (with homogeneous media)
Measuring interval ≥ 40 s, selectable
Fuse
PE L1 N PE
T
1A
CNM 750
1
230V AC / 50Hzor115V AC / 60Hz
L1
16
N2
3
18
StamoSens CNM 750 / CNS 70
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Installation
Installation instructions Sensor holder
Caution! Do not install the sensor suspended from the cable. Use a wall bracket or an immersion assembly with pendulum frame for sensor mounting.
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Wall bracket for sensor
C07-CXS70xxx-00-05-00-xx-003.eps
Immersion assembly for sensorC07-CXS70xxx-00-05-00-xx-002.eps
Pendelum frame for immersion assembly
200
100
15
120 15470 88
25
15
Ø7 x14
Ø128
50
55
R 1 1/2
6520
00
Ø 40
130
130
258
250
Ø11
StamoSens CNM 750 / CNS 70
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Weather protection cover and round post mount (accessories, optionally)
Environment
Ambient temperature –20 ... 60 °C
Ingress protection IP 68 (sensor, up to 1 bar)
Process
Medium temperature 2 ... 40 °C
Medium pressure max. 1 bar
Solid content
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Weather protection cover CYY 101C07-CYY102xx-00-00-00-xx-001.eps
Round post mount CYY 102
270
320
300
150
120
450
950
1500
4 x Ø12
Activated sludge sensor 2,5 g/l ... < 8 g/lClear water sensor < 2 g/l
StamoSens CNM 750 / CNS 70
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Mechanical construction
Design, dimensions
C07-CXM750xx-06-00-00-xx-001.eps
Dimensions transmitter, 1=front view, 2= side view, 3=top view, 4=back view
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Dimensions sensor
Weight
Materials
Process connection Sensor head G 1½
Cable specification
241
ENDRESS+HAUSERSTAMOSENS
198➀ ➁
➃
➂
329
185
60
60
69
2614
515
212
198
145
15
115
Ø 1
27
G 1
½
360
Transmitter approx. 1,6 kgSensor approx. 5 kg
Sensor head Stainless steel 1.4571 (AISI 316 L)Sensor optical windows Quartz glassSensor housing POM
Cable length: 7 m oder 15 m (cable with plug)Cable extension: up to 200 m (with sensor connection box, s. accessories)
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Human Interface
Display elements
C07-CXM750xx-07-00-00-de-001.eps
Display and operating elements
1 LED (measured value)2 LC display (status)3 Operating keys4 Indicator LEDs5 Mains switch
Certificates and approvals
approval Declaration of conformityThe product meets the legal requirements of the harmonised European standards. Endress+Hauser confirms compliance with the standards by affixing the symbol.
Test reports Quality certificateDepending 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.
M CE E K
ENDRESS+HAUSERSTAMOSENS
ON
OFF
POWER
➀
➃ ➄➂
➁
Messwert
18.0 mg/l-N
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Ordering information
Product structure Power supply7 Power supply 80 ... 250 V AC8 Power supply 24 V AC/DC9 Special version acc. to customers specification
Communication / OutputA RS 232 + 0/4 ... 20 mAY Special version acc. to customers specification
Version1 One channel version9 Special version acc. to customers specification
Additional equipmentA Quality certificateY Special version acc. to customers specification
CNM 750 - complete order code
ApplicationA Clear waterB Activated sludge with cleaning unit 230 VC Activated sludge with cleaning unit 115 VY Special version acc. to customers specification
Measuring range4 Measuring range 0.2 ... 30 mg/l NO3-N (activated sludge)5 Measuring range 0.2 ... 60 mg/l NO3-N (Clear water)9 Special version acc. to customers specification
Cable lengthB Cable length 7 mD Cable length 15 mY Special version acc. to customers specification
Version1 Without assembly2 Immersion assembly 2 m + pendulum frame with 250 mm wall spacing3 Sea water version4 Immersion assembly 2 m, 90° offset + pendulum frame w. 250 mm wall spacing9 Special version acc. to customers specification
Additional equipmentA Quality certificateY Special version acc. to customers specification
CNS 70 - complete order code
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Accessories Weather protection cover CYY 101,
for field mounting of the transmitter;order no. 50061258
Round post mount CYY 102,for weather protection cover mounting to vertical or horizontal pipes;order no. 50064291
Immersion assemblylength 2 m; order no. 51502959length 3 m; order no. 51502960special length; order no. 50066036
Wall bracket,for transmitter;order no. 51508576
Pendulum frame,for sensor;wall spacing 250 mm; order no. 51502962special version; order no. 50066036
Compressor attachment;order no. 51505419
Cleaning unit,230 V; order no. 51504764115 V; order no. 51504765
C07-CXM750xx-00-00-00-xx-010.eps
Cleaning unit for sensor
Extension cable,cable length 10 m, with plug and coupling;order no. 51502953
Plug,7-pin plug, IP 67;order no. 51502954
Coupling;order no. 51502955
Control line,50 m, 6 x 0,34;order no. 51503015
Sensor terminal housing,for cable extension from transmitter to sensor;order no. 51502956
ID 6
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Flow assembly for drinking water application,with reduction of the dead volume, stainless steel 1.4571 (AISI 316 Ti) / PVDF;order no. 51509332without reduction of the dead volume, stainless steel 1.4571 (AISI 316 Ti) / PVDF;order no. 51509333
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Flow assembly
A Hose connection inletID 1.6 mm (with dead volume reduction)ID 6.4 mm (without dead volume reduction)
B Hose connection inletID 1.6 mm (with dead volume reduction)ID 6.4 mm (without dead volume reduction)
C Split pin for dead volume reduction
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Sensor terminal housingC07-CXM750xx-00-00-00-de-002.eps
Sensor connection to sensor terminal housing
110
Sensor Pg 11
75
→→←←←→
1
2
3
4
5
6
7
+15 V / ca. 180 mA
-15 V / ca. 150 mA
Lichtstärke 0-20 mA
fx / 12 V
Merker / 12 V
RESET / 12V
1
2
3
4
5
6
7
DoseSteckerWH
BN
GN
YE
GR
BU
BK
WH
BN
GN
YE
GR
BU
BK
0V
127
160
5050
B
G ¼
AC
Ø 6.6 60
Endress+Hauser GmbH+Co. KGInstruments InternationalP.O. Box 2222D-79574 Weil am RheinGermany
Tel. (07621) 975-02Tx 773926Fax (07621) 975 345e-mail: [email protected]
Internet:http://www.endress.com
11.01
TI 215C/07/en/09.0251502579Printed in Germany / FM+SGML 6.0 / DT