Xylem MJK pHix Compact Manuale utente
Manual
EN 4.10 Version2007
pHix® Compact
PH / REDOX TRANSMITTER
pHix® Compact
EN 4.10 Version2007
2
Your notes:
pHix® Compact
EN 4.10 Version2007
3
Table of Contents
Declaration of conformity .........................................................................................................5
Introduction................................................................................................................................6
Measurements and standards used ....................................................................................6
Safety instructions..................................................................................................................6
Repair ................................................................................................................................. 7
Explosion hazardous areas.............................................................................................. 7
Construction...........................................................................................................................7
Product identification............................................................................................................7
Mounting ....................................................................................................................................9
Electrode types ......................................................................................................................9
Mounting the electrode........................................................................................................9
Gasket and O-ring .......................................................................................................... 10
Mechanical mounting......................................................................................................... 12
Mechanical mounting in general.................................................................................. 12
Open and closed systems ............................................................................................. 12
Mounting in open channels and reservoirs................................................................. 14
Mounting in closed systems.......................................................................................... 16
Mounting on pipe socket............................................................................................... 17
Eletrical mounting............................................................................................................... 19
Electrical mounting in general ...................................................................................... 19
Signal cable ..................................................................................................................... 19
Cutting the signal cable................................................................................................. 20
Extending the signal cable ............................................................................................ 21
Connection examples ........................................................................................................ 22
Local display.................................................................................................................... 22
Connection to PLC_PLS ................................................................................................. 23
Buffer adjustment ....................................................................................................................24
Buffer adjustment in general............................................................................................. 24
Buffer liquid......................................................................................................................... 25
Cleaning............................................................................................................................... 25
Buffer adjustment using the switch ring .......................................................................... 26
Example of buffer adjustment in pH 4 and 7 .............................................................. 27
Buffer adjustment using the tilt switch............................................................................. 28
Maintenance.............................................................................................................................31
Maintenance in general ..................................................................................................... 31
Intervals............................................................................................................................ 31
Redox electrodes............................................................................................................ 31
Cleaning of the electrode.................................................................................................. 32
Electrode lifetime................................................................................................................ 32
Electrode spare parts ......................................................................................................... 32
Electrode storage ............................................................................................................... 33
Specifications ...................................................................................................................... 33
Dimensions.......................................................................................................................... 35
pHix® Compact
EN 4.10 Version2007
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Appendencies..........................................................................................................................36
Error codes .......................................................................................................................... 36
Standard transmitter configuration .................................................................................. 36
HART® commands.............................................................................................................. 37
pHix® Compact
EN 4.10 Version2007
Declaration of conformity/
5
Declaration of conformity
1 http://www.mjk.com
pHix® Compact
EN 4.10 Version2007
Introduction/Measurements and standards used
6
1.
2.
3.
Introduction
Thank you for choosing a pHix® Compact pH / Redox transmitter. We have
done everything possible to make a pH / Redox transmitter that can fulfill all
your demands.
pHix® Compact is very simple to install and connect, as electrode, fitting and
transmitter is built together in the sameNEMA 6X / IP 68 class enclosure. By
doing so, all error sources like e.g. bad cable connections and leaking fittings
are eliminated.
As pHix® Compact is equipped with an union flange in one end and male
thread in the other, the transmitter is very easily mounted in open tanks as well
as pipes without the usual use of fittings.
You can always contact your representative or the MJK Service Hotline for
advice and guidance. Also, take a look at www.mjk.com1
pHix® Compact is registered trademark of MJK.
Measurements and standards used
This manual uses both the US standard measurement system (inches),
Fahrenheit and North American industry standards and the metric
measurement system, Celsius and European industry standards and side by
side.
Safety instructions
Read this manual carefully.
Be aware of the environment on the installation site. Wear necessary
protective equipment and follow all current safety regulations.
pHix® Compact can provide a start signal for dangerous machinery.
Always ensure that connected machinery and other equipment are
effectively being put out of service (i.e. removal of main fuses, lock main-
and/or security switches in off position) before commencing setting, fault
finding, service and maintenance work etc.
pHix® Compact
EN 4.10 Version2007
Introduction/Construction
7
Repair
Repair must only made by MJK or by a service representative approved by
MJK.
Explosion hazardous areas
Note! pHix® Compact must not be installed in explosion hazardous areas!
Construction
pHix® Compact is a loop powered 4-20 mA 2-wire transmitter with power
supply and measuring signal transmitted over the same two wires.
pHix® Compact also has HART® communication capabilities via the mA wires
where both the primary measuring signal (pH or redox) and the secondary
measurement signal can be read. HART® communication gives the possibility
to configure nearly all parameters like measuring ranges, alarm limits, electrode
parameters and also commands for buffer adjustment.
HART® communication requires that pHix® Compact is connected to a HART®
communicator or a PLC with HART® interface.
pHix® Compact is delivered as standard for pH or redox measurement, but can
also be delivered for other types of measurement and non-standard settings.
Product identification
Check that the item(s) delivered corresponds to the ordered item(s). The item
number is printed on a label that is sticked onto the packing. Shown in the
following, is the label for a delivery including a pHix® Compact transmitter with
pH electrode with zero point at pH 4,6:
pHix® Compact
EN 4.10 Version2007
Introduction/Product identification
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1.
2.
3.
4.
Item number
Item description
Serial number
Electrode specification.
An identical marking is found on the pH transmitter cable:
pHix® Compact
EN 4.10 Version2007
Mounting/Electrode types
9
Mounting
Electrode types
The electrode housing is marked with information about electrode type and
measuring range for the actual electrode:
pH electrode, item no. 160310, 1 - 14 pH, 50-176° F /10-80° C, 0 = 4.6 pH.
pH electrode, item no. 160311, 1 - 14 pH, 50-176° F /10-80° C, 0 = 7.0 pH.
Redox electrode, item no. 160312, 176° F /0-80° C.
Mounting the electrode
Upon delivery of pHix® Compact, the electrode is not mounted.pHix®
Compact is configured for the electrode type included in the delivery, and
pHix® Compact
EN 4.10 Version2007
Mounting/Mounting the electrode
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therefore it must only be used together with the electrode with which it was
delivered.
Contact MJK if other electrode types should be used. Replacement of an
electrode to another of the same type does not require reconfiguration.
The electrode must not become dry. Therefore, do not remove the protective
cap before before commissioning of pHix® Compact.
Gasket and O-ring
It is very important that both gasket and O-ring and packing surfaces are clean
and smooth and without cracks and scratches to avoid penetration of liquid in
the center plug connection.
Check that gasket and O-ring are complete and clean and that they are placed
correctly.
Likewise, the connectors in both transmitter and electrode should be absolutely
clean and dry. Use a dry cloth if needed.
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