Endress+Hauser CA76NA User manual

Products Solutions Services
Operating Instructions
CA76NA
Analyzer for sodium
BA01706C/07/EN/04.22-00
71578460
2022-04-01
Valid as of version
V1.14.00

CA76NA Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 4
1.1 Symbols used .......................... 4
1.2 Documentation ........................ 5
2 Basic safety instructions ............ 6
2.1 Requirements for the personnel ............ 6
2.2 Intended use .......................... 6
2.3 Workplace safety ....................... 6
2.4 Operational safety ...................... 6
2.5 Product safety ......................... 7
2.6 IT security ............................ 7
3 Product description ................. 8
3.1 Product design ......................... 8
3.2 Operating principle .................... 11
4 Incoming acceptance and product
identification ..................... 13
4.1 Incoming acceptance ................... 13
4.2 Product identification ................... 13
4.3 Storage and transport .................. 14
5 Mounting ......................... 15
5.1 Mounting requirements ................. 15
5.2 Mounting the analyzer on a vertical surface .. 17
5.3 Post-mounting check ................... 17
6 Electrical connection .............. 18
6.1 Connecting requirements ................ 18
6.2 Connecting the analyzer ................. 18
6.3 Ensuring the degree of protection .......... 21
6.4 Post-connection check .................. 21
7 Operation options ................. 22
7.1 Structure and function of the operating
menu .............................. 22
8 Commissioning .................... 23
8.1 Preliminaries ......................... 23
8.2 Setting up PROFIBUS communication ....... 29
8.3 Function check ....................... 30
8.4 Switching on the measuring device ......... 30
8.5 Configuring the measuring device .......... 30
9 Operation ......................... 32
9.1 Main menu, measured value display ........ 32
9.2 Diagnosis ........................... 33
9.3 Maintenance ......................... 35
9.4 Parameters .......................... 38
9.5 PROFIBUS parameters .................. 40
10 Diagnostics and troubleshooting ... 46
10.1 Diagnostic list ........................ 46
10.2 Reset measuring device ................. 47
10.3 Firmware history ...................... 48
11 Maintenance ...................... 49
11.1 Maintenance schedule .................. 49
11.2 Maintenance tasks ..................... 49
11.3 Taking out of service ................... 60
12 Repair ............................ 61
12.1 General information ................... 61
12.2 Spare parts .......................... 61
12.3 Return .............................. 61
12.4 Disposal ............................ 61
13 Accessories ....................... 63
13.1 Device-specific accessories ............... 63
14 Technical data .................... 65
14.1 Input ............................... 65
14.2 Output ............................. 65
14.3 Power supply ......................... 66
14.4 Performance characteristics .............. 66
14.5 Environment ......................... 67
14.6 Process ............................. 67
14.7 Mechanical construction ................ 68
Index .................................. 69

About this document CA76NA
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1 About this document
1.1 Symbols used
1.1.1 Warnings
Structure of information Meaning
LDANGER
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation will result in a fatal or serious
injury.
LWARNING
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid the dangerous situation can result in a fatal or serious
injury.
LCAUTION
Causes (/consequences)
If necessary, Consequences of
non-compliance (if applicable)
‣Corrective action
This symbol alerts you to a dangerous situation.
Failure to avoid this situation can result in minor or more serious injuries.
NOTICE
Cause/situation
If necessary, Consequences of
non-compliance (if applicable)
‣Action/note
This symbol alerts you to situations which may result in damage to
property.
1.1.2 Symbols
Additional information, tips
Permitted or recommended
Not permitted or not recommended
Reference to device documentation
Reference to page
Reference to graphic
 Result of a step

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1.1.3 Symbols on the device
Symbol Meaning
Caution: Hazardous voltage
No naked flames
Fire, open sources of ignition and smoking are forbidden
Eating and drinking are forbidden
Wear eye protection goggles
Wear safety gloves
Reference to device documentation
1.2 Documentation
The following instructions complement these Operating Instructions and are available on
the product pages on the Internet:
Installation Instructions, EA01214C

Basic safety instructions CA76NA
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2 Basic safety instructions
2.1 Requirements for the personnel
• Installation, commissioning, operation and maintenance of the measuring system may
be carried out only by specially trained technical personnel.
• The technical personnel must be authorized by the plant operator to carry out the
specified activities.
• The electrical connection may be performed only by an electrical technician.
• The technical personnel must have read and understood these Operating Instructions
and must follow the instructions contained therein.
• Faults at the measuring point may only be rectified by authorized and specially trained
personnel.
Repairs not described in the Operating Instructions provided must be carried out only
directly at the manufacturer's site or by the service organization.
2.2 Intended use
CA76NA is an analyzer designed for the continuous measurement of the concentration of
sodium in aqueous solutions.
The analyzer is designed for use in the following applications:
• Monitoring of the water/steam circuit in power plants, particularly for condenser
monitoring
• Quality assurance of demineralization systems and seawater desalination
• Quality assurance of the ultrapure water circuit in the semi-conductor and electronics
industry
Use of the device for any purpose other than that described, poses a threat to the safety of
people and of the entire measuring system and is therefore not permitted. The
manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Workplace safety
As the user, you are responsible for complying with the following safety conditions:
• Installation guidelines
• Local standards and regulations
Electromagnetic compatibility
• The product has been tested for electromagnetic compatibility in accordance with the
applicable international standards for industrial applications.
• The electromagnetic compatibility indicated applies only to a product that has been
connected in accordance with these Operating Instructions.
2.4 Operational safety
LWARNING
Contact of chemicals with eyes and skin, and inhalation of vapors
Damage to the skin, eyes and respiratory organs
‣Wear protective goggles, protective gloves and a lab coat when working with chemicals.
‣Avoid any skin contact with chemicals.
‣Do not inhale any vapors.
‣Ensure the area is well ventilated.
‣Comply with further instructions in the safety data sheets for the chemicals used.

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2.5 Product safety
2.5.1 State-of-the-art technology
The product is designed to meet state-of-the-art safety requirements, has been tested, and
left the factory in a condition in which it is safe to operate. The relevant regulations and
international standards have been observed.
Devices connected to the analyzer must comply with the applicable safety standards.
2.6 IT security
We only provide a warranty if the device is installed and used as described in the
Operating Instructions. The device is equipped with security mechanisms to protect it
against any inadvertent changes to the device settings.
IT security measures in line with operators' security standards and designed to provide
additional protection for the device and device data transfer must be implemented by the
operators themselves.

Product description CA76NA
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3 Product description
3.1 Product design
3.1.1 Main components
12
3
4
5
6
7
8
9
10
11
A0047852
 1 Main components
1 Power switch 7 Bottle for lab sample
2 Electronics unit 8 Sample conditioning unit (controls and filters the flow of sample)
3 Amplifier 9 Measuring unit with supply vessel
4 Bottle with alkalization reagent 10 Alkalization unit
5 Liquid control unit 11 Overflow vessel with level control
6 Bottle with sodium stock solution

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3.1.2 Liquid control unit
12
3
4
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9
10
58
A0047855
 2 Liquid control unit including measuring unit and supply vessel
1 Sample outlet, circuit 7 Housing outlet
2 Outlet after alkalization pump 8 Sample outlet, calibration
3 Inlet of alkalization pump 9 Temperature sensor
4 Inlet, standard solution 10 Fold-out housing
5 Inlet, laboratory sample Na+ Sodium sensor
6 Sample outlet, measurement pH pH sensor

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3.1.3 Sample conditioning unit
12
45
63
A0047864
 3 Sample conditioning unit
1 Solenoid valve
2 Outlet to analyzer
3 Overflow valve
4 Sample outlet (bypass at solenoid valve)
5 Filter
6 Control valve (set sampling volume, for even sample overflow)
The sample conditioning unit performs the following tasks:
• Filters the sample
• Controls the flow of sample
• Limits the maximum pressure to 1 bar (14.5 psi)
• Provides fresh sample to every channel
If a channel is being measured, the corresponding solenoid valve (1) for the channel
opens. The sample flows to the overflow vessel. The rest of the time the sample drains off
via the bypass at the solenoid valve (4).
Each channel needs a minimum overpressure of 0.5 bar (7.3 psi) and a sample flow of
10 l/h (2.64 gal/hr). The maximum permitted supply pressure is 5 bar (72.5 psi).
3.1.4 Measuring system
A complete measuring system comprises:
• Analyzer CA76NA
• Sodium electrode (not included with the analyzer, can be ordered as an accessory)
→  63
• pH electrode (not included with the analyzer, can be ordered as an accessory)
→  63
• Standard solution (not included with the analyzer, can be ordered as an accessory)
→  63
• Alkalization reagent (recommended: diisopropylamine (DIPA), to be purchased
separately, > 99.0 % (GC), in a bottle made from a solid material, e.g. glass).