HACH LANGE LXG440 User Manual
DOC023.53.90137
AN-ISE sc ammonium and nitrate combination sensor
USER MANUAL
07/2010, Edition 1
© HACH Company, 2010. All rights reserved. Printed in Germany
Table of Contents
Section 1 Specifications..................................................................................................................... 5
1.1 Dimensions ........................................................................................................................................ 6
Section 2 General Information.......................................................................................................... 7
2.1 Safety information............................................................................................................................... 7
2.1.1 Hazard information in these operating instructions.................................................................... 7
2.1.2 Precautionary labels .................................................................................................................. 7
2.2 General information about the probe.................................................................................................. 8
2.3 Theory of operation............................................................................................................................. 9
Section 3 Installation.........................................................................................................................11
3.1 Unpack the probe ............................................................................................................................. 11
3.2 Unpacking the sensor cartridge........................................................................................................ 12
3.2.1 Assembling the storage container including sensor cartridge.................................................. 13
3.2.2 Removing the cartridge from the transport container............................................................... 14
3.3 Probe assembly................................................................................................................................ 15
3.4 Installation of the cleaning unit (optional) ......................................................................................... 17
3.5 Installation of the probe in the sample flow....................................................................................... 18
3.5.1 Position of the probe on the mount.......................................................................................... 19
3.5.2 Probe installation example....................................................................................................... 19
3.6 Connect the probe to the sc controller (non-hazardous location) with screw fittings........................ 20
Section 4 Operation........................................................................................................................... 21
4.1 How to use an sc controller .............................................................................................................. 21
4.2 Sensor setup..................................................................................................................................... 21
4.3 Sensor data logger ........................................................................................................................... 21
4.4 Sensor diagnostics menu ................................................................................................................. 21
4.5 Sensor setup menu........................................................................................................................... 22
4.6 Calibration/Matrix correction............................................................................................................. 25
4.6.1 Sensor code calibration ........................................................................................................... 26
4.6.2 Matrix correction via LINK2SC................................................................................................. 26
4.6.3 Matrix correction overview ....................................................................................................... 26
4.6.4 Performing the matrix correction.............................................................................................. 27
4.6.4.1 MATRIX 1 correction (1 point matrix correction)............................................................. 27
4.6.4.2 Value correction 1 ........................................................................................................... 28
4.6.4.3 Value correction 2 ........................................................................................................... 29
4.6.4.4 MATRIX 2 correction (2 point matrix correction)............................................................. 30
Section 5 Maintenance ..................................................................................................................... 31
5.1 Maintenance schedule...................................................................................................................... 31
5.2 Clean the sensor............................................................................................................................... 31
5.2.1 Polish the chloride electrode.................................................................................................... 31
3
Table of Contents
5.3 Replace the sensor cartridge ............................................................................................................32
5.4 Storage..............................................................................................................................................34
Section 6 Troubleshooting ...............................................................................................................35
6.1 Error messages.................................................................................................................................35
6.2 Warnings ...........................................................................................................................................36
6.3 Troubleshooting ..............................................................................................................................37
6.3.1 Troubleshooting during operation.............................................................................................37
6.3.2 Troubleshooting during calibration ...........................................................................................38
Section 7 Replacement parts and accessories .......................................................................39
7.1 Replacement Parts............................................................................................................................39
7.2 Accessories.......................................................................................................................................39
7.3 Validation accessories.......................................................................................................................39
7.4 Corresponding documentation ..........................................................................................................39
Section 8 Contact ..............................................................................................................................41
Section 9 Limited warranty ..............................................................................................................43
Section 10 Certification.....................................................................................................................45
10.1 Certification .....................................................................................................................................45
Appendix A Modbus Register ........................................................................................................47
Index ......................................................................................................................................................49
4
Section 1 Specifications
These are subject to change without notice.
General Information
Measuring method
Measuring range
Precision 5% of the measured value + 0.2 mg/L
Reproducibility 5% of the measured value + 0.2 mg/L1 (ammonium and nitrate)
Potentiometric measurement using ion-selective electrodes (ISE) for ammonium,
potassium, nitrate and chloride, reference system
0 to 1000 mg/L [NH
0 to 1000 mg/L [K+]
0 to 1000 mg/L [NO
0 to 1000 mg/L [Cl
–N]
4
–N]
3
–
]
1
(ammonium and nitrate)
Response time (90 %) < 3 minutes (5 to 50 mg/L NO
Measuring interval Continuous
pH range pH 5 to pH 9
Calibration methods
Power consumption 1 W
Power supply Via sc controller
Data transfer Via sc controller
Ambient data
Typical environment Used in the biological phase of municipal wastewater treatment
Storage temperature
Operating temperature Air: –20 to 45 °C (–4 to 113 °F)
Sample temperature +2 to 40 °C (35 to 104 °F)
Max. Flow velocity < 4 m/s
Max. sensor immersion
depth/pressure
Sensor code for sensor cartridge
1 and 2 point value correction or matrix correction
Sensor: –20 to 60 °C (–4 to 140 °F)
Sensor cartridge: 5 to 40 °C (41 to 104 °F)
Can be immersed at a depth of 0.3 to 3.0 m [1 to 10 ft];
maximum pressure: 0.3 bar (4.4 psi).
–N/NH4–N)
3
Max. Compressed air output during
cleaning unit operation
General information about the probe
Probe dimensions
Length of probe cable
Probe weight Approximately 2380 g (63.6 oz)
Wetted materials
Installation angle 45° +/– 15° vertical in flow direction
1
With standard solutions and ISE electrodes under laboratory conditions
3.1 bar (45 psi)
320 mm × 84.5 mm (12.6 × 3.3 in.) (Length × Ø)
Refer to Figure 1, Page 6.
Standard: 10 m [33.8 ft]
Extension cables are available as an option in the following lengths:
5, 10, 15, 20, 30, 50 m [16.4, 33.8, 49.2, 65.6, 98.4, 164 ft].
Maximum overall length: 100 m [328 ft]
Only for immersed installations:
Probe: stainless steel (1.4571), ASA + PC, silicon, PVC and PU
Sensor cartridge: PVC, POM, ABS, stainless steel (1.4571), NBR
Optional cleaning unit: TPE, PUR, stainless steel (1.4571)
5
Specifications
1.1 Dimensions
Figure 1 Dimensions of stainless steel probe
6
Section 2 General Information
2.1 Safety information
Please read the entire operating instructions before the instrument is unpacked, set up or
put into operation. Pay attention to all danger and caution statements. Failure to do so
could result in serious injury to the operator or damage to the equipment.
To make sure that the protection provided by this instrument is not impaired, do not use or
install this instrument in any manner other than that specified in these operating
instructions.
2.1.1 Hazard information in these operating instructions
DANGER
Indicates a potentially or imminently hazardous situation that, if not avoided, results in death or
serious injury.
WARNING
Indicates a potentially or imminently hazardous situatio
or serious injury.
n that, if not avoided, could result in death
Indicates a potentially hazardous situation that may result in minor or moderate injury.
Indicates a situation that, if not avoided, could result in damage to the instrument. Information that
requires special emphasis.
Note: Information that supplements points in the main text.
2.1.2 Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the
instrument could occur if not observed. A symbol, if noted on the instrument, will be
included with a danger or caution statement in the operating instructions.
This symbol, if noted on the instrument, references the user manual for operation and/or safety information.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal
systems after 12 August 2005. In conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return old or end-of life equipment to the manufacturer
for disposal at no charge to the user.
Note: For return for recycling, please contact the equipment manufacturer or supplier for instructions on how to
return end-of-life equipment, manufacturer-supplied electrical accessories, and all auxiliary items for proper disposal.
CAUTION
NOTICE
7
General Information
4
1
2
3
2.2 General information about the probe
The probe was developed for use in municipal wastewater applications.
The AN-ISE sc probe (please refer to Figure 2) with ion-selective electrodes (ISE probe) is
a continuously operating online process probe for directly measuring ammonium and
nitrate in reservoirs. It operates without reagents and requires no further processing of the
sample. The ammonium/nitrate ions are measured using an ion-selective electrode.
The only wearing part is the sensor cartridge (please refer to Figure 3, Page 9) (order
number LZY694). The sensor cartridge consists of the ion-selective electrodes for
ammonium and potassium (compensation electrode for ammonium) or nitrate and chloride
(compensation electrode for nitrate), a pHD reference system and a temperature sensor
for temperature compensation.
An additional cleaning unit designed for automatically cleaning the sensor cartridge
membranes can be ordered separately. Refer to the instruction sheet supplied with the
cleaning unit.
The manufacturer recommends using the High Output Air Blast system for the
compressed air supply (refer to 7.2 Accessories, page 39); this is a compressor in
weather-proof plastic housing.
Figure 2 AN-ISE sc probe
1 Sensor cartridge 3 Probe body
2 Fixing bolt for sensor cartridge 4 Union nut
8
General Information
Figure 3 Sensor cartridge
1 Ammonium electrode 5 Reference system
2 Nitrate electrode 6 Temperature sensor
3 Potassium electrode 7 Marker hole for assembling the probe
4 Chloride electrode
2.3 Theory of operation
The AN-ISE sc probe uses the ion-selective electrode to measure ammonium ions (NH
and nitrate ions (NO
potassium, chloride and temperature are compensated for by means of the relevant
built-in electrodes. The reference system is designed using pH-differential technology and
is therefore particularly stable in terms of drift and contamination.
Ion-selective electrodes have a special membrane to which only a specific type of ion can
adhere. As a result an ion-specific potential forms on the membrane surface. To measure
a potential difference, a reference system is required that will not be affected by the
sample to be measured.
The CARTRICAL
individual electrodes against each other, but also the measuring electrodes with the
compensation electrodes and the reference; this is carried out at the factory.
–
) in a wastewater sample. Common interfering factors due to
3
TM
technology reduces cross sensitivity by calibrating not only the
+
)
4
9
General Information
10
Section 3 Installation
1
2
3
4
Only qualified personnel should conduct the tasks described in this section of the operating
manual.
3.1 Unpack the probe
Remove the probe from the shipping container and inspect it for damage. Verify that all
items listed in Figure 4 are included. If any items are missing or damaged, contact the
manufacturer or distributor.
NOTICE
Figure 4 Product contents
1 Probe 3 Sensor cartridge packaging
2 Probe cable 4 Cleaning brush
11
Installation
3.2 Unpacking the sensor cartridge
Avoid touching the membrane on the sensor cartridge or damage to the sensor may occur.
Make a note of the date on the sensor cartridge certificate. It is not an expiration date, but indicates
the optimum date to put the sensor cartridge into operation to ensure a maximum service life.
NOTICE
Figure 5 Storage container packaging
1 Sensor cartridge packaging 6 Socket head screws
2 Storage container for sensor cartridge 7 Black gasket
3 Test certificate for cartridge with sensor code 8 Latest date to put into operation
4 Polishing paper for chloride electrode 9 Serial Number
5 Socket head wrench
12
2
3
4
5
1
3.2.1 Assembling the storage container including sensor cartridge
Installation
Figure 6 Storage container for sensor cartridge
1 Storage container 4 Sensor cartridge
2 Sponges soaked in storage solution 5 Lid with bayonet coupling
3 Black gasket
1
Save items 1, 2, 3 and 5 for subsequent storage of the sensor cartridge.
1
13
Installation
3.2.2 Removing the cartridge from the transport container
Figure 7 Opening the storage container
1 Release bayonet coupling 4 Remove black gasket
2 Remove lid 5 Insert black seal in storage container and close the lid.
3 Take out sensor cartridge
Note: This black gasket is not required for installation. It is advisable to keep the black gasket in
the sensor cartridge storage container.
NOTICE
The sensor cartridge must not be in contact with the air for more than 30 minutes. Make sure that
the electrodes do not dry out.
14
Please complete the following movement when you have unpacked the cartridge in order
to moisten the inside of the membranes.
Figure 8 Knocking the air out of the sensor cartridge
1 Hold the sensor cartridge in one hand with the
membranes facing downward.
Installation
2 Now hit sharply downward over your other hand.
3.3 Probe assembly
Avoid touching the membranes on the sensor cartridge or damage to the sensor may occur.
1. Place the black gasket Figure 10, Page 17 in the recess on the sensor body.
2. Make sure that the black gasket is correctly positioned.
The black gasket prevents sensor damage caused by moisture penetration.
NOTICE
NOTICE
15
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