pH and Redox Transmitter
pH and Redox Transmitter
GB pHix Compact Manual 100318
User Manual
SW 836502
pH and Redox Transmitter
Konformitätserklärung
Wir, MJK Automation A/S,
DK-2850 Nærum, erklären in
alleiniger Verantwortung, dass
das Produkt
auf das sich diese Erklärung
bezieht mit der/den folgenden
Nor me(en) oder normativen
Dokument(en) übereinstimmt.
EN 50081-1:1995
EN 50082-1:1995
EN 60730
Gemäss den Bestimmungen der
Richtlinie
89/336/EWG
73/23/EWG; 93/68/EWG
Declaration of Conformity
We, MJK Automation A/S,
DK-2850 Nærum, declare under
our sole responsibility that the
product
to which this declaration relates
is in conformity with the following
standard(s) or other normative
document(s).
EN 50081-1:1995
EN 50082-1:1995
EN 60730
following the provisions of
Directive
89/336/EWG
73/23/EWG; 93/68/EWG
Declaration de conformite
Nous, MJK Automation A/S,
DK-2850 Nærum, déclarons
sous notre seule responsabilité
que le produit
auquel se réfère cette
déclaration est conforme á la
(aux) norme(s) ou autre(s)
document(s) normatif(s)
EN 50081-1:1995
EN 50082-1:1995
EN 60730
conformément aux dispositions
de Directive
89/336/EWG
73/23/EWG; 93/68/EWG
Dichiarazione di conformità
Noi, MJK Automation A/S,
DK-2850 Nærum, dichiariamo
sotto la nostra esclusiva
responsabilità che l’apparecchio
al quale questa dichiarazione si
riferisce, è conforme alla
seguente normativa(e) standard
o ad altri documenti di normativa(e)
EN 50081-1:1995
EN 50082-1:1995
EN 60730
conformemente alla disposizioni
della Direzione
89/336/EWG
73/23/EWG; 93/68/EWG
Declaración de Conformidad
Nosotros, MJK Automation A/S,
DK-2850 Nærum, declaramos
bajo nuestra única
responsabilidad que el producto
al cual se refiere esta declaración,
está en conformidad con la(s)
siguente(e) norma(s) u otros
documentos normativos
EN 50081-1:1995
EN 50082-1:1995
EN 60730
según las disposiciones de la(s)
directiva(s)
89/336/EWG
73/23/EWG; 93/68/EWG
Konformitetserklæring
Vi, MJK Automation A/S,
DK-2850 Nærum, påtager os
det fulde ansvar for at produktet
som denne erklæring angår, er i
overensstemmelse med følgende
standard(er) eller andre
normdokument(er).
EN 50081-1:1995
EN 50082-1:1995
EN 60730
efter bestemmelserne i
direktiv
89/336/EØF
73/23/EØF; 93/68/EØF
Jens Kruse
28.09.2004
MJK pHix® pH / redox / temperature transmitter
MJK pHix
®
pH / redox / temperature transmitter
GB pHix Compact Manual 100318
2
pH and Redox Transmitter
Contents
Introduction .............................5
Safety instructions ..................... 5
Repair ........................................... 5
Explosion hazardous areas ........... 5
Construction ............................. 6
Product identification ................. 6
Mounting .................................. 7
Electrode types ............................. 7
Mounting the electrode ............. 8
Gasket, O-ring and plug ................ 8
Mechanical mounting .............. 10
General ....................................... 10
Open and closed systems .......... 10
Mounting in open channels and
reservoirs .................................... 10
Mounting in closed systems ........ 11
Mounting on a pipe stub ............. 12
Electrical mounting .................. 13
General ....................................... 13
Signal cable ................................ 13
Cutting the signal cable ...................
Cutting the signal cable ............... 14
Extending the signal cable .......... 14
Connection examples .............. 15
Local display ............................... 15
Panel display .............................. 15
Connection to PLC/PLS .............. 15
Maintenance .......................... 21
General ................................... 21
Intervals ...................................... 21
Redox electrodes ........................ 21
Cleaning of elektrodes ............. 21
Electrode lifetime ..................... 21
Spares .................................... 22
Dimensions ............................. 22
Specifications .......................... 22
Dimensions ............................. 22
Appendices ............................ 23
Error codes ............................. 23
Standard transmitter
configuration ........................... 23
®
commands: ................. 23
HART
Accessories for mechanical
mounting ................................. 24
Accessories for electrical
mounting ................................. 25
Buffer adjustment .................. 16
General ................................... 16
Buffer liquid ............................. 16
Cleaning .................................. 17
Buffer adjustment using the
switch ring............................... 17
Example of buffer adjustment
in pH 4 and 7 .............................. 18
Buffer adjustment using the tilt
switch ..................................... 19
3
SW 836502
pH and Redox Transmitter
GB pHix Compact Manual 100318
4
Introduction
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 same NEMA 6X class
enclosure. By doing so, all error sources
like e.g. bad cable connections and leaking
fittings are eliminated.
®
As pHix
on 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 http\\:www.
phix.dk.
pHix
Compact is equipped with an uni-
®
is registered trademark of MJK.
Safety instructions
1: Read this manual carefully.
2: Be aware of the environment on the in-
stallation site. Wear necessary protective
equipment and follow all current safety
regulations.
®
3: 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.
Repair
1: Repair must only made by MJK or by a
service representative approved by MJK.
Explosion hazardous areas
®
pHix
Compact must not be installed in
explosion hazardous areas!
5
SW 836502
Introduction
Construction
®
pHix
Compact is a 4-20 mA 2-wire trans-
mitter with power supply and measuring
signal transmitted over the same two wires.
®
pHix
Compact also has HART® communi-
cation 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® commu-
nicator or a PLC with HART® interface.
®
pHix
Compact is delivered as standard for
pH or redox masurement, 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 below is the label
for a delivery including a pHix
®
Compact
transmitter with pH electrode with zero point
at pH 4,6:
➀
➁
➂
➀
➃
➀ Item number.
➁ Item description.
➂ Serial no.
➃ Electrode specifi-
cation.
GB pHix Compact Manual 100318
An identical marking is found on the pH
transmitter cable:
6
Mounting
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, 10 - 80 °C, 0 = 4.6 pH.
pH electrode, item no. 160311, 1 - 14 pH, 10 - 80 °C, 0 = 7.0 pH.
Redox electrode, item no. 160312, 0 - 80 °C.
7
SW 836502
Mounting
Mounting the electrode
Upon delivery of pHix Compact
®
, the elec-
trode is not mounted.
pHix Compact
®
is configured for the
electrode type included in the delivery, and
therefore it must only be used together with
the electrode with which is was delivered.
pHix Compact
®
shoud be used only with
the electrode type included the delivery.
Contact MJK if other electrode types should
be used.
Replacement of the electrode to another of
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, O-ring and plug
It is very important that both gasket and
O-ring and packing surfaces is 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 ant that they are placed correctly.
Likewise, the connectors in both transmitter
and electrode should be absolutely clean
and dry. Eventually use a dry cloth.
GB pHix Compact Manual 100318
Check that the connectors are
absolutely clean and dry.
8
Mounting
1: Smear the O-ring in acid-free grease or
Vaseline.
2: Check that the O-ring is placed correctly
in the recess of the new electrode.
3: Check that the hole for the electrode in
4: Screw in the new electrode and tighten
Do not use tools!
5: Finally, pHix
®
the pHix
Compact is completely dry – if
necessary use a dry cloth.
by hand.
®
Compact must be buffer
adjusted prior to commissioning.
See pg. 16.
9
SW 836502
Mounting
Mechanical mounting
General
®
pHix
Compact is made from Ryton (PPS)
and stainless steel (EN 1.4404 / ASTM
316L), and has because of this a tremendeous resistance against chemicals.
pHix® Compact can be used without any
further preparation for measuring in solvents
and strong basic or acid liquids.
Open and closed systems
®
pHix
Compact is designed for measuring in
both open and closed systems.
Open systems is e.g. gutters, wells, and
reservoirs. Closed systems is e.g. pipe
systems or tanks/vessels.
pHix® Compact
has class IP 68
Max.
10 m !
enclosure, and
therefore withstands
submersion into open
system to a max.
pressure of
1 bar / 10 mWG.
Mounting in open channels and reservoirs
Due to the lifetime of the electrode and
measurement accuracy, the following should
possibly be complied with when mounting
®
pHix
Compact.
®
1: pHix
Compact should be mounted on a
location with a good liquid circulation.
2: The electrode tip should be minimum 30
cm below the liquid surface.
3: The electrode tip must not touch the
bottom.
Suspended in the cable
If the liquid is flowing relatively slow and
therefore giving no risk of pHix
®
Compact
hitting the side of the channel/reservoir,
pHix® Compact may be suspended in the
cable by means of a cable bracket.
Max.
5 bar !
GB pHix Compact Manual 100318
pHix® Compact con-
forms to pressure
class PN 5, and can
therefore be mounted
in closed systems
with a working pres-
sure of max. 5 bar.
pHix® Compact is submerged directly into the
liquid and is suspended in the cable by means of a
cable bracket (item no. 560916).
10
Mounting
Mounted on a pipe end
When measuring in e.g. open tanks, inlet
wells or gutters where strong currents can
occur, pHix
®
Compact should be firmly fixed.
Fixed mounting can be made by means of a
pipe with 5/4” inner thread (ISO 228-1), and
screw pHix
®
Compact directly into the pipe.
Mounting in closed systems
The electrode is filled with a liquid which
should cover the membrane internally at all
times. Therefore, pHix
®
Compact should not
be mounted in angles exceeding 75 ° from
vertical.
Because of the liquid inside the electrode,
pHix® Compact should always be mounted in
angles less than 75 ° from vertical.
pHix® Compact can be screwed into a
pipe stub with 2" outer thread by means of
an union (item no. 521409), that is placed
over the housing flange after removal of the
switch ring.
pHix® Compact mounted directly on a immersion
bracket (item no. 155205), which is fastened
with universal bracket (item no. 200205) and wall
bracket (item no. 200215).
Pull off the
switch ring.
Put on the
union.
Put on the
switch ring - if
needed.
The switch ring is only used for buffer adjustment (calibration), but it is also possible
to perform a buffer adjustment without using
the switch ring. See also pg. 16, "Buffer
adjustment".
11
SW 836502
Mounting
Mounting on a pipe stub
In order to ensure a tight seal and correct
function of pHix
should be complied with:
1: The pipe stub must be flush and free of
scales, burrs etc.
2: The pipe stub must have a length so
that the tip of the electrode is exposed
approximately 10 mm into the liquid.
3: Take care to have adequate room for
mounting and removal o f pHix
pact.
4: The working pressure of the system
must not exceed 5 bar g.
5: The working temperature of the s ystem
must not exceed 80 °C.
See also the following illustrations for correct
adaptation to the pipe system.
Min. 320 mm
free space for
mounting/removal of pHix
Compact.
®
Compact, the following
®
®
Com-
Approx. 10 mm
pHix® Compact is mounted correctly when the
electrode tip is exposed approximately 10 mm out
from the inner lining of the pipe.
Viton gasket
80 mm to
inner lining
Max. working pressure = 5 bar g.
Maks. working temperature = 80 °C.
GB pHix Compact Manual 100318
2 " outer pipe
thread (ISO
228-1)
Min. 25 mm
thread
12
Mounting
1
1
2
2
1
1
2
2
Electrical mounting
General
®
pHix
Compact must not be installed in
explosion hazardous locations!
®
pHix
Compact should be connected to an
active 4-20 mA input or be supplied from a
separate 12 - 30 VDC voltage source.
Max. power consumption is 50 mW.
®
pHix
Compact's 4-20 mA output(s) is gal-
vanically separated from the liquid.
Signal cable
®
pHix
Compact comes with either 1 or 2
galvanically separated signal outputs.
Note:
PHix Compact is delivered with
cables made of PVC or PUR.
Check the type of cable according
➀
➀
➁
➁
➂
➂
pHix® Compact with 1 x 4-20 mA output for
ph or redox measurement.
PVC Cable PVC Cable PUR Cable
-> 2005 2006 -> 07 2007 ->
Nr.: Designation: Color: Color: Color: Signal:
1 Shield
2 + 12-30 V DC Red Red 1 Black pH- or redox signal
3 - 4-20 mA Black Black 2 Black Output 1
➀
➁
➂
➃
➄
®
pHix
Compact with 2 x 4-20 mA outputs, 1 for
ph or redox measurement and 1 for temperature
PVC Cable PVC Cable PUR Cable
-> 2005 2006 -> 07 2007 ->
Nr.: Designation: Color: Color: Color: Signal:
1 Shield
2 + 12-30 V DC Red Red 1 Black pH- or redox signal
3 - 4-20 mA Black Black 2 Black Output 1
4 + 12-30 V DC Yellow Orange Grey Temperature signal
5 - 4-20 mA Orange Brown Brown Output 2
measurement.
to the specifications before connecting pHix Compact.
13
SW 836502
Mounting
Cutting the signal cable
The cable comes with stripped wire ends
ready for mounting.
2 Black Grey Brown
1 Black
Shield
1 Black
Shield
2 Black
Uncutted cable end for pHix® Compact
with 1 respectively 2 signal outputs.
Besides the signal wires, the cable also contains wires solely used for service purposes
and software upgrades.
These cables are exposed when the cable
is cut.
The cable for a pHix® Compact
with dual outputs is cut and the service wires are
Service
wires:
Green
Yellow
Brown
White
exposed.
Grey
1 Black
2 Black
Shield
Extending the signal cable
There are no specific demands to the cable
that may be used for extending the existing
cable, except that it should be shielded and
that the voltage drop should not be too big.
pHix Compact
®
is a passive transmittter.
Considerations should be taken regar-
ding the voltage drop over
the signal cable.
The supply voltage on the site must not
drop below 12 V DC at maximum current
(20 mA.)
In order not to compromise operational reliability, the cables should be interconnected
by means of a watertight connection box
(item no. 200590).
MJK connection box (item no. 200590).
The service wires must not be used !
Only the signal wires (1 black + 2 black /
grey + brown) and shield may be used!
GB pHix Compact Manual 100318
14
Mounting
2
2
1
1
+
_
2
2
1
1
1
1
2
2
+
_
1
1
2
2
Connection examples
Local display
MJK Power
Supply 515
L
N
Panel display
L
N
R1 R2
Connection to PLC/PLS
MJK Digital
Indicator 531
24 VDC supply
MJK Digital
Indicator 533
2 x voltage free
relay outputs
MJK Power
Supply 515
pHix
4-20 mA signal with 24 V DC
supply from 533
Cable from
®
pHix
Compact
Cable from
®
Compact
PLC/PLS with
passive input
PLC/PLS with
active input
Cable from
®
Compact
pHix
+
L N
-
Cable from
®
Compact
12-30 VDC
pHix
+
-
15
SW 836502
Buffer Adjustment
Buffer adjustment
General
In order to ensure a precise and stable pH
measurement, pHix
fer adjusted with regular intervals.
Buffer adjustment is a calibration, which
is carried out in practice by dipping pHix
Compact in solutions (buffers) with known
pH values. The calibration is made by using
these known pH values as a reference point.
®
pHix
Compact is buffer adjusted using 2
buffers with pH values of 4 and 7 (acidic
range) or pH values of 7 and 10 (alkalic
range). For measurements around pH 7
(neutral) both buffers can be used.
The sequence of different pH buffer solutions is not important. pHix
matically detects which buffer is used for
ajusting the point of origin, and which buffer
is used for ajusting the slope (sensitivity).
The first reference point sets the correct
zero point for the measurement curve, and
the second reference point sets the correct
slope for the measurement curve.
®
pHix
Compact is as standard delivered to
use buffer values at the values 4, 7 and 10,
but other values can be chosen via HART®
communication.
®
Compact must be buf-
®
Compact auto-
®
Second buffer adjustment with pH 4 as reference.
Buffer liquid
Buffer liquid is delivered as ready-to-use
solutions with the pH values 4, 7 and 10.
During the buffer adjustment, pHix
®
Compact is calibrated in accordance with
the pH values of the buffer solutions. It is
therefore important to use as accurate buffer solutions as possible, i.e. a pH 7 buffer
solution really has a pH value of exactly 7.
First buffer adjustment with pH 7 as reference.
GB pHix Compact Manual 100318
MJK delivers buffer solutions for both
pH og redox calibration.
The pH value of the buffer liquid is dependant of the temperature, and the stated pH
value is valid at 25 °C.
Buffer liquid has limited lifetime. Bufferliquid
for pH 4 and 7 has a life time of approx. 1
year, and buffer liquid for pH 10 is somewhat shorter.
Note, that buffer liquid with pH 10 is very
unstable, and should therefore be disposed
of no more than 1 hour after it has been
poured from the bottle.
16
Buffer Adjustment
Cleaning
Before initiation of a buffer adjustment, the
electrode should be rinsed in running water
and additionally in demineralized water before the electrode is lowered into the buffer
liquid - and again between every step in the
buffer adjustment process.
Use only fresh buffer solutions! Dispose of
any used buffer liquid.
Take care that transmitter, electrode and
buffer solution has the same temperature -
preferably approx. 25 °C.
Put eventually pHix
®
Compact in a bucket
of lukewarm water before commencing a
buffer adjustment.
Buffer adjustment using the switch ring
Remember to clean the electrode as descri-
bed in the previous section!
When the switch ring has been put on for at
least 10 minutes, it will only be possible to
buffer adjust pHix
®
Compact with the switch
ring.
The switch ring has 4 positions, and must
only be set to one of these positions in order
to obtain correct function:
Pos.: Function:
M Measurement.
The switch ring should always be in this
positioni during normal service (measuring)
This is indicated by the LED that is flashing
for approx. every 5 seconds.
4 Buffer adjustment in buffer with
pH value pH 4.
7 Buffer adjustment in buffer with
pH value pH 7.
10 Buffer adjustment in buffer with
pH value pH 10.
If the switch ring is set to one of the positions 4, 7 or 10, the LED will give out 3 short
flashes every 5 seconds.
®
If pHix
Compact is being put into a buffer
liquid with the same value as the switch
ring is set to, pHix® Compact will automatically begin to scan for a buffer with the
same value. When the value is found, pHix
®
Compact will automatically set the 0-point
or span to the correct value, and the LED
will indicate this with 2 short flashes every 5
seconds.
®
pHix
Compact is now ready either for mea-
surement or for another buffer adjustment at
another pH value.
®
pHix
Compact determines automatically
if zero point or span need to be adjusted
depending of the electrode's zero point and
the preceeding buffer values.
®
If pHix
Compact cannot find the pH value
for the selected buffer solution, it will go
into alarm condition, which is indicated with
continuous LED flashes every second.
17
SW 836502
Buffer Adjustment
Example of buffer adjustment in pH 4 and 7
1: With the switch ring in position 'M', flush
the electrode tip in demineralised water.
(The LED gives 1 short flash every 5.
sec.)
2: Turn the switch ring from position 'M' to
position '7', and dip the electrode tip into
the pH 7 buffer solution.
(The LED will now begin to give 3 short
flashes every 5 sec.)
When the buffer adjustment has finished
sucessfully, the LED will start to give 2
short flashes every 5. sec.
The zero point is now set.
3: Turn the switch ring from position '7' to
position '4', and dip the electrode tip into
the pH 4 buffer solution.
(The LED will now begin to give 3 short
flashes every 5 sec.)
When the buffer adjustment has finished
sucessfully, the LED will start to give 2
short flashes every 5. sec.
The span angle is now set.
In service (measure-
ment).
1 flash every 5.
second.
Buffer adjustment in
pH 4 buffer.
GB pHix Compact Manual 100318
Buffer adjustment in
pH 7 buffer.
18
Buffer adjustment in
pH 10 buffer.
Buffer Adjustment
Buffer adjustment using the tilt switch
Remember to clean the electrode as descri-
bed in the previous section!
Only the built-in tilt switch is active, when
the switch ring has been removed for more
than 10 minutes.
The tilt switch inside pHix
when the electrode tip is turned upwards.
When the electrode tip has been turned
upwards in more than 30 seconds, pHix
Compact will go into buffer adjustment
mode.
Proceed as described:
Remove pHix
®
Compact from the process,
rinse the electrode, and turn the electrode
upside down.
The buffer adjustment mode is initiated after
approx. 30 seconds - this is indicated by the
LED with 3 short flashes every 5 seconds.
®
Compact detects
®
with one of those values. When the correct
value is found, the zero point or span will
automatically be set to the right value. The
LED will give 1 short flash every 5 seconds
for indication of a succesful calibration.
®
Compact is now ready to be put into
pHix
service or for another buffer adjustment with
another pH value.
If a new buffer adjustment to another (or
same) pH value, pHix
®
Compact is simply
turned upside-down again with the electrode tip pointing upwards in approximately
30 seconds until the LED gives 3 short
flashes every 5 seconds, whereafter above
procedure is repeated.
®
If pHix
Compact cannot find the correct
value for the selected buffer liquid, the transmittter will go into fault condition indicated
by a flash every second.
The pHix
®
Compact software determines
automatically whether it is the zero point or
the span that need adjustment depending
on the zero point value of the electrode and
the preceeding buffer values.
®
If pHix
Compact is dipped into a buffer
solution with a value of 4, 7 or 10 pH, pHix
Compact automatically search for a buffer
®
19
SW 836502
Buffer Adjustment
GB pHix Compact Manual 100318
20
Maintenance
Maintenance
General
A pH or redox measuring system require
maintenance with regular intervals.
Cleaning and buffer adjustment (calibration)
is a normal and necessary maintenance that
should be carried out regularly.
Intervals
The interval between buffer adjustments and
cleaning is depending widely on the working
conditions. Therefore, the easiest way to
find the most appropriate cleaning interval is
by feeling one's way.
For instance, start out with cleaning and
buffer adjustment every week.
If the measurement is unchanged or just
slightly changed after the buffer adjustment,
the electrode were not dirty or just slightly
dirty, and the cleaning interval can be changed to 2 weeks and after that 1 month.
The intervals are equally reduced if the electrodes are very dirty and the measurement is
significally changed after buffer adjusting.
There are no general guidelines to cleaning and adjustment, men in most cases a
monthly adjustment is sufficient.
Before beginning a buffer adjustment, the
electrode must be thoroughly washed, first
in running water, if necessary a degreasing
fluid like for example 10% hydrochloric acid
solution, and there after in de-ionised water
before the electrode is put into the buffer
solution and in between every step of the
buffer adjustment.
electrode.
A 10% hydrochloric acid solution can be
used for cleaning if the electrodes are greasy. Protein coatings is removed with Pepsin
cleaning fluid (item number 163020).
Electrode lifetime
The expected lifetime of the electrodes is
dependant of the measurement.
The lifetime is given with reservation as the
physical conditions as well as the temperature, pressure and pollution of the fluid has
great influence on the stated lifetime.
The lifetime is based on 25 °C, but if the
temperature is doubled, the lifetime
will be halved!
PH electrodes in purifying plants for ordinary
household wastewater lasts approximately
1 year, whereas the lifetime of pH electrodes
in industrial plants is dependent on measuring application and the process.
Redox electrodes have a lifetime of approximately 2 years, depending on cleaning.
Redox electrodes
Redox electrodes require cleaning like pH
electrodes, but not buffer adjusting.
However, MJK do deliver redox buffers for
control of electrode and transmitter.
If the transmitter does not show the correct
value when put into the buffer solution, the
electrode must be exchanged.
Cleaning of elektrodes
Use clean potable water for cleaning the
21
SW 836502
Spares and Specifications
Spares Specifications
Dimensions
Item no: Description:
160310 pHix® pH electrode, 0-point=4,6 pH
160311 pHix® pH electrode, 0-point=7,0 pH
160312 pHix® redox electrode
570054 O-ring for electrode
571030 Black rubber gasket for electrode
521409 Union ring w. Viton gasket
for mounting of pHix on pipe end
521441 Viton gasket for union ring
The followin is recommended for cleaning
and buffer adjustment:
Item no: Description:
163020 Pepsin solution, 0,25l
163030 pH buffer, 6 x 25ml ampoules.
(2 pcs. pH 4, pH 7 and pH 10.)
163032 pH buffer, 1 liter pH 4
163034 pH buffer, 1 liter pH 7
163036 pH buffer, 1 liter pH 10
163040 Redox buffer, 6x25ml;
+230 mV Pt-Ag/AgCl
pHix® Compact
Supply voltage 12-30 V DC
Consumption App. 50mW
Temperature range -20 … +60 °C
Housing material Ryton (PPS) and
stainless steel
(EN 1.4404 / ASTM 316L)
Enclosure IP 68, withstands
submersion to 10 mWG
Input 0-14 pH/-1000 ... +1000 mV
Input impedance Measuring input: > 10
Reference input: > 106 ohm
Output 0-14 pH / 4-20 mA
Temperature comp. -20 … +80 °C
Temp. electrode Built-in behind steel section.
Buffer adjustment Automatic with tilt switch,
switch ring or HART®
command
Cable length 6 meter
CE approvals EN50081-1, EN50082-1
12
ohm
Dimensions
GB pHix Compact Manual 100318
1¼" RG
(ISO 228-1)
NB! Union ring must be orde-
red separately..
22
Appendices
Appendices
Error codes
Symptom / mA signal: Fault: Remedy:
Constant current signal Electrical connection Check connection and make the necessary
or I = 0 mA is not made correctly. corrections.
Unsteady current signal Undervoltage. Check the voltage at transmitter.
Min. voltage @ max. load > 12 V DC!
I = 3.80 mA Undervoltage. Check the voltage at transmitter.
Min. voltage @ max. load > 12 V DC!
I = 3.85 mA Electrode error. Exchange the electrode.
I = 3.90 mA Calibration
not possible. Exchange the electrode.
I = 3.95 mA pH lower than Readjust the measuring range to a lower range.
measuring range.
I = 4.00 mA Error on startup. Disconnect the transmitter from PSU for
min. 5 seconds and try again.
I = 22.00 mA pH higher than Readjust the measuring range to a higher range.
measuring range.
Standard transmitter configuration
The transmitter is standard configured as described below on delivery:
pH transmitter, item no. 203111:
Measuring range: 0-14 pH = 4-20 mA, 0-point = 4,6 pH
pH and temperature transmitter, item no. 203112:
Measuring range: 0-14 pH = 4-20 mA, 0-punkt = 4,6 pH, Temperature: 0-50° C = 4-20 mA
Redox transmitter, item no. 203121:
Measuring range: -1000 to +1000 mV = 4-20 mA
HART® commands:
All commands and settings can be read and set by means of HART
separate documentation regarding HART® commands.
23
®
commands. Ask for
SW 836502
Appendices
Accessories for mechanical mounting
Union for mounting on
pipe end,
item no. 521409
Fitting for submersion,
item no. 155205
Extension for universal bracket,
item no. 200215
∅ 50
GB pHix Compact Manual 100318
1¼" thread
(ISO 228-1)
24
100
1000
Universal bracket,
item no. 200205
Appendices
Accessories for electrical mounting
Loop supplied digital indicator
type 531, item no. 200125.
(See also data sheet 6.3.)
230 V AC digital indicator type
533 with built-in 24 V DC power
supply and 2 relay outputs for
alarm, control etc., item no.
200130.
(See also data sheet 6.3.)
Power supply type 515,
item no. 200100.
(See also data sheet no. 6.3.)
25
SW/HW 837999/837999
pH and Redox Transmitter
DK: +45 45 56 06 56
NO: +47 69 20 60 70
SE: +46 53 31 77 50
NL: +31 251 672171
IRL: +353 879535625
USA: +1 847 482 8655
AUS: +61 3 9758 8533
MJK Automation A/S
Liability
MJK Automation A/S is liable to the common rules of
Danish law on product liability. However, the liability is
reduced to coverage of our public liability insurance of
products. To the extent where nothing else follows in lines
of invariable rules of law, we are not liable for loss of profits
and working deficits or other indirect losses.
Changes
As our products are developed continuously, we reserve
the right to make any alterations without prior notice.
GB pHix Compact Manual 100318
26
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