Hach POLYMETRON 8362 User manual

DOC024.52.93025
POLYMETRON Model 8362 pH
Measurement
User Manual
05/2015, Edition 11

Restriction of hazardous substances (RoHS)
The European Union RoHS Directive and subsequent regulations introduced in member states and
other countries limits the use of six hazardous substances used in the manufacturing of electrical and
electronic equipment.
Currently, monitoring and control instruments do not fall within the scope of the RoHS Directive,
however Hach Lange has taken the decision to adopt the recommendations in the Directive as the
target for all future product design and component purchasing.
Note: The following only applies to exports of this product into the People’s Republic of China.
Conductivity plastic sensor
(8310, 8311, 8312) O
Conductivity stainless
steel sensor (8314, 8394) OO
Digital sensor PCB O O
Glass electrode O O
O:
X:

Transmitter 9135 - pH measurement in pure water
621=183=062 Issue J Hach Lange 07/2013
This instrument conforms to the European Directives:
- 2004/108/EC EMC Directive
- 2006/95/EC Low Voltage Directive
Warning !
There are no user-serviceable parts in either the transmitter or sensor. Only Hach Lange
personnel or their authorized representative should attempt repair of the system and only
components expressly approved by the manufacturer should be used. Any attempt to
repair the instrument in contradiction of these guidelines may result in damage to the
instrument and injury to the person making the repair. It will also void the warranty and
may compromise the safe operation, electrical integrity or CE compliance of the
instrument.
Hach Lange
6 route de Compois – CP212
CH-1222 Vesenaz Geneva
Tél. + 41 22 855 91 00
Fax + 41 22 855 91 99
Note :
This equipment has been tested and found to comply with the limits for Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Precautionary Labels :
Read all labels and tags attached to the instrument. Personal injury or damage to this
instrument could occur if not observed.
This symbol, if noted on the instrument, references the instruction manual
for operation and / or safety information.
Electrical equipment marked with this symbol may not be disposed of in
European public disposal systems after 12 August of 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 Producer for disposal at no charge to the user.
Note : For return for recycling, please contact the equipment producer or
supplier for instructions on how to return end-of-life equipment for proper
disposal.
Important document. Retain with product records.
!

Transmitter 9135 - pH measurement in pure water
Page 1
Table of contents
Hach Lange.................................................................................................................... 2
Table of contents .......................................................................................................... 1
1. General description of the system for pH measurement in pure water............ 3
Presentation of the 9135 transmitter ........................................................................ 3
Introduction ............................................................................................................... 4
Theory..........................................................................................................4
Description of the system for pH measurement in pure water ................................. 6
Characteristics .......................................................................................................... 7
2. Installation of the chain for measuring pH in pure water ................................. 13
Unpacking the 9135 transmitter and the 8362 probe ............................................. 13
Advice for installation.............................................................................................. 13
Mounting types........................................................................................................ 14
3. Electric connections............................................................................................. 17
Electronic board lay-out in the 9135 transmitter enclosure .................................... 17
Main connection...................................................................................................... 19
4. Hydraulic connection ........................................................................................... 21
Preparation of system measurement (Model 8362-1) .............................................. 21
Hydraulic connections............................................................................................. 21
Flow rate and pressure ........................................................................................... 21
Electrical connection of the measurement system (Model 8362)........................... 23
5. Using the 9135 transmitter................................................................................... 27
Utilization rules for the menus ................................................................................ 27
Modification of a value ............................................................................................ 28
Measures display .................................................................................................... 28
Main display ............................................................................................................ 29
Display options........................................................................................................ 30
Choice of the language..............................................................................30
S/DISPLAY Menu......................................................................................30
6. Configuration of the 9135 transmitter ................................................................ 31
MAIN menu ............................................................................................................. 31
CALIBRATION menu.............................................................................................. 32
pH calibration.............................................................................................32
Buffer solutions..........................................................................................32
Choice of the calibration type....................................................................34
Automatic calibration .................................................................................34
2 point calibration.......................................................................................35
Process calibration ....................................................................................35
Values calibration ......................................................................................35
Slope and offset limits................................................................................35

Transmitter 9135 - pH measurement in pure water
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Temperature calibration.............................................................................36
Calibration proceedings example ........................................................................... 37
Manual calibration, automatic temperature compensation mode .............37
Buffer 1 ......................................................................................................37
Buffer 2 ......................................................................................................38
PARAMETERS Menu ............................................................................................. 40
HISTORIC Menu..................................................................................................... 40
MAINTENANCE Menu............................................................................................ 40
PROGRAMMING Menu.......................................................................................... 41
S/MEASURE Menu....................................................................................42
S/mA OUTPUTS Menu..............................................................................44
S/SPECIAL PROG. Menu .........................................................................45
S/ALARMS Menu.......................................................................................46
S/CONTROLLER Menu.............................................................................49
S/RS485 Menu ..........................................................................................54
SERVICE Menu ...................................................................................................... 55
S/AVERAGE Menu....................................................................................56
S/DISPLAY Menu......................................................................................56
S/CODE Menu...........................................................................................57
S/SOFT ISSUE Menu................................................................................58
S/DEFAULT/VALUES Menu......................................................................58
S/mA ADJUST Menu.................................................................................59
S/FACTORY Menu....................................................................................59
7. Failures detection and error messages.............................................................. 61
Failures detection.................................................................................................... 61
Electrode cleaning .................................................................................................. 62
Maintenance ........................................................................................................... 62
Error messages....................................................................................................... 62
8. Analogue outputs and temperature control....................................................... 67
Analogue outputs control ........................................................................................ 67
Pt100 simulator connections................................................................................... 68
pH simulator connections ....................................................................................... 68
Appendix A : Default values ........................................................................................ 1
Appendix B : Spare parts list....................................................................................... 1

Transmitter 9135 - pH measurement in pure water
Page 3
1. General description of the system for pH
measurement in pure water
Presentation of the 9135 transmitter
The 9135 pH transmitter and associated measuring
sensors has been designed for measuring and
continuous control of pH or redox potential (with
possibility of temperature measurement) in industrial
process.
An automatic control of the sensor defaults improves
the preventive servicing of the measuring chain.
2 analogue outputs (0/4 – 20 mA) may be freely
programmed.
Note :
The programming is displayed in 6 languages. To
modify this parameter see § 4 Changing the
programming language.
Four relays and RS485 are available in option.

Transmitter 9135 - pH measurement in pure water
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Introduction
PH Measurement
Theory
pH is the negative logarithm of the hydrogen ion
activity and a measure of the acidity, or alkalinity of a
solution.
pH = -log a [H+]
pH is normally measured using a glass electrode and a
reference electrode.
The glass electrode acts as a transducer, converting
chemical energy (the hydrogen into activity) into an
electrical energy (measured in millivolts). The reaction
is balanced and the electrical circuit is completed by
the flow of ions from the reference solution to the
solution under test.
The electrode and reference solution together develop
a voltage (emf) whose magnitude depends on the type
of reference electrode, the internal construction of the
glass electrode, the pH of the solution and the
temperature of the solution. This voltage is expressed
by the Nernst equation :
E = Eo - (2.3 RT/F)xlog a[H+]
E = Eo -(slope) xlog a [H+]

Transmitter 9135 - pH measurement in pure water
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where :
E = the emf of the cell
Eo = the zero potential (isopotential) of the system :
depends on the internal construction of the
glass and reference electrodes
R = gas constant
T = temperature in Kelvin
a[H+] = activity of the hydrogen ion (assumed to be
equivalent to the concentration of hydrogen
ions)
F = Faraday constant
For every unit change in pH (or decade change in ion
concentration) the emf of the electrode pair changes
by 59.16 mV at 25°C. This value is known as the
Nernstian slope of the electrode.
The pH electrode pair are calibrated using solutions of
known and constant hydrogen ion concentration,
called buffer solutions. The buffer solutions are used to
calibrate both the electrode isopotential and slope.

Transmitter 9135 - pH measurement in pure water
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Description of the system for pH measurement in
pure water
The probe 8362 is constituted of the following
elements:
1. pH Electrode (unpluggable)
2. Temperature sensor (unpluggable)
3. U-bolt
4. Earth
5. Retaining nut for the chamber
6. Measurement chamber
7. Electrodes support
8. Thread 1/8" NPT, sample input
9. Filetage 1/8" NPT, sortie échantillon
10. Label to record the sensor installation date
11. Flat surface for wrench
The probe 8362-1 is provided with two unpluggable
cables of length 3 m, one for the pH sensor and the
other for the temperature sensor. As an option, cables
of 10 m and 20 m can be supplied.

Transmitter 9135 - pH measurement in pure water
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This high purity water pH sensor is specially designed
for continuous in-stream pH measurement of pure and
ultra-pure water.
It uses a reference electrode very similar to the
measuring electrode (combined concentric electrode)
in order to minimise the impedance under which the
measurement is carried out.
It is made of 316L stainless steel, which protects the
measurements from electrostatic (evacuation of the
charges resulting from the passage of the low
conductivity liquid) and magnetic disturbances.
The circulation chamber was designed without a
retention zone in order to avoid any disturbance of the
measurement by CO2dissolution and by the
accumulation of air bubbles or insoluble deposits (iron
oxide, residues salted out by the resins).
Characteristics
OPERATING CONDITIONS
Ambiant temperature -20°...+60°C
Relative humidity 10...90%
Power supply voltage
fluctuation
±10 %
Over voltage category 2
Pollution degree 2 (as CEI 664)
Altitude < 2000 m
Measurement category I (overvoltage less than 1500 V)
MEASURE CHAMBER / Probe
Pressure 16 bar/25°C
6 bar/100°C
Cable length 3 m
Flow 100 to 400 ml/mn

Transmitter 9135 - pH measurement in pure water
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MEASURE
Display range 0 ... 14 pH (possibility to measure up to -3 pH)
-1500 mV.... 1500 mV
-20 °C ... 200°C (-4 °F...392 °F)
Display resolution 0.01 pH / 0.1 pH (adjustable)
1 mV
0.1 °C
Measurement range
with 8362 probe
2...12 pH
0...80 °C
Precision with 8362 probe < 0,05 pH for vapour water cycle
< 0,1 pH for ultra pure water
Repeatability with 8362
probe
0,01 pH / 24 h
Temperature probe Pt 100
Automatic temperature
compensation range
-20 ... 200 °C
-4 ... 392 °F
Temperature compensation
range
Nernst special compensation for ultra pure water like
different tables or linear coefficient.
Sensor inputs differential measurement
Input impedance > 10 12 Ω
CALIBRATION
Calibration type - NIST (4 / 6.88 / 9;22)
- DIN9 (4 / 7 / 9)
- DIN10 (4 / 7 / 10)
- 2 points (manual)
- 1 point process
- values (slope and offset)
Slope matching 41 ... 71 mV à 25 °C
70 ... 120 %
Zero matching 3 pH
250 mV
Temperature calibration - 50 °C...+20°C
(- 90 °F...+ 36°F)

Transmitter 9135 - pH measurement in pure water
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CONTROLLER
Setpoint programmable in the range 0... 14 pH or
-1500....+1500 mV
Neutral zone programmable from 0...3 pH or 0... 200 mV symetric
around the regulating point
Proportional band programmable from 0...500 %
Periodicity programmable from 3..60 seconds (impulse control) or
from 1 à 30 seconds (frequency control)
Controller output 2 isolated contacts S1 and S2.
S1 : base injection
S2 : acid injection
Automatic/manual switch possible
ANALOGUE OUTPUT
Output signals 2 galvanicly outputs insulated
Allocation pH / redox / temperature
Type 0 ... 20 mA
4 ... 20 mA
Maximum load 800 Ω
Accuracy 0.03 mA
ALARMS
Alarm number 4
Function - limits
- alarm system
- timer
Hysteresis 0 ... 10%
Temporization 0 ... 999 s

Transmitter 9135 - pH measurement in pure water
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Breaking power
(ohmic overcharge)
250 V AC, 5A max
100 V DC, 0,7A max
Use a cable (rated 105°C and AWG22 to 14). The
external cable insulation should be cut as close as
possible from the terminal block.
Response time 10 ms
Relaxation time 5 ms
RS485
Baud rate 300 ... 19200 bauds
Insulation galvanic
Station number 32 max
PROGRAMMING
Language french
english
german
italian
spanish
dutch
Display icones + graphic zone (80 x 64 pixels)
Protection codes calibration
programming
service
ELECTRIC CHARACTERISTICS
Power supply voltage •standard version (±10 %) :
- 100 V ... 240 VAC 50/60 Hz
•low voltage :
- 13 - 30 VAC 50/60 Hz
- 12 – 42 VDC
Preamplifier ±9 V continu
Connections screw terminals 2,5 mm2
Consumption 25 VA
Fuse 5 x 20 mm cartridge
T2AL - 250V

Transmitter 9135 - pH measurement in pure water
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European standards EN 61326 – 1 (Industrial level for immunity)
EN 61010 – 1 (low tension main lines)
UL and CSA agreement ETL 3152732
EMC conformity
MECHANICAL CHARACTERISTICS
Dimensions 144 x 144 x 150 mm
Weight 2 Kg (transmitter) + 0,9 kg (probe 8362)
Material housing : Polyester coated aluminium
screws : stainless steel
Tightness IP65
Mounting types wall
pipe
panel
Cable glands
and shutters
2 x PG13 and shutter
2 x PG11 and shutter

Transmitter 9135 - pH measurement in pure water
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2. Installation of the chain for measuring pH
in pure water
Unpacking the 9135 transmitter and the 8362 probe
Inspect the package at the reception to detect an
eventual damage due to the transport. Make sure the
package contents are not damaged.
Check if the package corresponds to your order :
•quantity delivered,
•type of instrument and version accordingly to the
instruction plates,
•accessories : 4 cable glands and 2 mounting
screws,
•instruction manual,
•measurement system of pH in pure water model
8362,
•certificate of conformity to specifications.
Advice for installation
Choose a site where :
•vibrations are not too excessive,
•supply relays or commuters are away,
•maintenance will be easy,
•the ambient temperature and humidity must
respect the specifications.
Note :
It is preferable to mount the instrument above eye
level, allowing an unrestricted view of the front
panel displays and controls.

Transmitter 9135 - pH measurement in pure water
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Mounting types
3 possibilities to mount the instrument (use of the red
clamping bow) :
The transmitter housing conforms to norm DIN 43700.
Panel mounting:
Panel cutting : 138 x 138 mm
Front panel dimensions : 144 x 144 mm
•2 screws ∅4 mm lg 16 flat head (provided) for
panel thickness 0 to 4 mm
•2 screws ∅4 mm lg 20 flat head (provided) for
panel thickness 4 to 8 mm
Fig 2.1 Panel mounting
Panel cutting 138 x 138 mm
(5.4 in. x 5.4 in.)
Front panel dimensions 144 x 144 mm
(5.8 in. x 5.8 in.)
Thickness panel Inferior to 8 mm

Transmitter 9135 - pH measurement in pure water
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Wall mounting :
•2 screws ∅4 mm lg 60 flat head (not
provided)/ 80 mm center distance
Fig. 2.2 Wall mounting

Transmitter 9135 - pH measurement in pure water
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Pipe mounting :
•∅2" maximum - 2 screws ∅4 mm lg 60
(provided)
Fig. 2.3 Vertical mounting
Fig. 2.4 Horizontal mounting