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

Page 2

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

Page 4

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

Page 5

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

Page 6

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

Page 7

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 CO

2

dissolution 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

Page 9

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

Page 10

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

Page 11

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

Page 13

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

Page 14

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

Page 15

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

Page 16

Pipe mounting :

• ∅ 2" maximum - 2 screws ∅ 4 mm lg 60
(provided)

Fig. 2.3 Vertical mounting

Fig. 2.4 Horizontal mounting

Transmitter 9135 - pH measurement in pure water

Page 17

3. Electric connections

Electronic board lay-out in the 9135 transmitter
enclosure

________________________________________________________________________

Fig. 3.1 Electronic board lay-out

1. Terminal block 4-20 mA

2. CPU board

3. RS485 board (option)

4. Relay board (option)

5. pH module

6. Programmed EEPROM

7. Program update connector

8. Power supply board

Transmitter 9135 - pH measurement in pure water

Page 18

________________________________________________________________________

Fig. 3.2 9135 shielded plate

Supply terminals blocks and relays are under the
shielded plate.

Note :

Electrical connections should remain dry to
ensure a proper operation of the instrument.

Check the creeping of the cables when opening
the transmitter.

Il is required to use shielded cables. The shield
should be linked to the main shielding.

Transmitter 9135 - pH measurement in pure water

Page 19

Main connection

Electrical connection should be performed only by
qualified personnel. The power supply accepts 100­240 VAC ± 10 %, without changes in configuration.
The terminal block for power connections can be lifted
from its header for easier installation.

For safety reasons, it is required to observe the
precautions below :

• Use a three wire mains supply cable (2 core + PE)
with a cross section between 0.35 and 2 mm²
(AWG 22 to 14) rated at 105°C minimum. The
external cable insulation should be cut as close as
possible from the terminal block.

• The instrument should be connected to the power
supply by means of a breaker located close to the
instrument and be identified. The supply shall be
fitted with an overcurrent protection device rated at
20 Amp maximum.

• This breaker should switch off phase and neutral in
case of electrical problems or when the user wish
to service the instrument. However the power
supply earth must always be connected.

Note :

Before servicing the instrument, ensure that the
power supply is switched off.

Transmitter 9135 - pH measurement in pure water

Page 21

4. Hydraulic connection

Preparation of system measurement (Model 8362-1)

• Unscrew the measure chamber.

• Remove the pH bulb protector boot covering the

pH bulb and rinse the bulb area with deionized
water or pH buffer. Save the boot if the electrode
will be stored. It is possible that air bubbles may
have migrated into the pH sensitive bulb during
shipment. Since the electrode is not able to
function with air behind the pH bulb, gently shake
the electrode downward in the same manner as a
clinical thermometer to remove any trapped air
bubbles.

• Record the installation date on the label.

Hydraulic connections

• Re-screw the measure chamber.

• Assemble the 1/8" NPT connections in the 8 and 9

threads, then connect the sample inlet pipe in 8
and outlet pipe in 9 (see drawing next page).

• Circulate the sample and check visually through
the chamber the absence of bubbles which could
disturb the measurement.

• Adjust the flow to about 150 ml/mn.

Flow rate and pressure

The streaming potential increasing with flow velocity, it
is required to adjust the sample flow rate at a rate
which does not exceed the one needed to flush
properly the flow cell.

The flow rate must be set between 75 ml/mn and
375 ml/mn (ideal rate 166 ml/mn).

To avoid back pressure we advise atmospheric
discharge.

Transmitter 9135 - pH measurement in pure water

Page 22

Fig. 4.1 Measure system configuration

1 AS9 Connector
2 Temperature sensor
3 U-bolt
4 Earth terminal
5 Retaining nut for the chamber
6 Measurement chamber
7 Electrodes support
8 Sample in

9 Sample out
10 Label to record the sensor installation date
11 Flat surface for wrench

Notes :

The liquid should circulate from right to left (see
drawing).

The flow chamber must be earth grounded to be
protected from external electrical noise.

The flow chamber should never be empty to

avoid electrode damage: keep the glass bulb in
water.

Transmitter 9135 - pH measurement in pure water

Page 23

Electrical connection of the measurement system
(Model 8362)

pH probe (before July 2013)

- Translucent rigid center wire = measuring pH

- White (long) internal shield

= reference

- White (short) external shield

= on the shield plate of the transmitter

Note :

Check that the measuring cell earth terminal (No. 4 in
Fig 4.1) is securely grounded.

Transmitter 9135 - pH measurement in pure water

Page 24

pH probe (after July 2013)

- Translucent rigid center wire = measuring pH

- Green internal shield

= reference

- Yellow external shield

= on the shield plate of the transmitter

Temperature sensor

- Brown and white (long) wire = Pt100

- White (short) external shield

wire = must be connected on the

transmitter side of the shield plate

Note :

The protective boot filled with KCL (3M) will provide an ideal
storage chamber for long periods. So this one must not be
preserved during more than a year.

Never store your probe in contact with air even if it is in its flow
chamber.

Transmitter 9135 - pH measurement in pure water

Page 25

8362/9135 Links

Sensor Connections Junction Box Links with 9135 Distance

Sensor - 9135

3, 10, or 20m

(for pH and

temperature sensor)

Not required N/A 0-3, 10, or 20m

3, 10, or 20m

(for pH and

temperature sensor)

08350=A=8000

(see illustration below)

Low impedance cable with

6 conductors + shielding

(ref: 370=506=025)

20-100m

Intermediary connection details (junctions)

WARNING: It is required to cut any wires not used.

• Connection on preamplifier 08350=A=8000

Transmitter 9135 - pH measurement in pure water

Page 26

Transmitter 9135 - pH measurement in pure water

Page 27

5. Using the 9135 transmitter

Utilization rules for the menus

The user interface of the 9135 transmitter is made of a
display screen and 4 keys.

The (Esc) key is used to go back to the previous
menu.

The (Enter) key is used to validate the selections and
the data.

Both middle keys, right and left function keys, are
defined according to the words and symbols which are
displayed above each function key.

Modify a parameter

Select

Choose a menu

Main

Go back to the main display principal

Menu

Display the main menu

Disp2

Display screen 2

Disp 3

Display screen 3

OK

Validate the measure during a calibration

-

Increase a value

+

Decrease a value

6.98

pH

25.0°C

Disp 2

Menu

S1

S2

S3

S4

Transmitter 9135 - pH measurement in pure water

Page 28

Modification of a value

The highlighted digit may be modified with the key

. Each digit can be validated by pressing

ENTER. Repeat both operations for each digit.

Note :

If you do not use the display for at least 10
minutes, the instrument returns to the measuring
mode except for the calibration and maintenance
mode.

An access code may be required for the
calibration, programming and service menu (see



CODE menu).

Measures display

Measures display allow to display measures and state
of the device. There are three :

Reference Description

c

Main display

d

Alarm state

e

Function keys

6.98

pH

25.0°C

Disp2 Menu

S1

S2

S3

S4

c

e

e

d d

Transmitter 9135 - pH measurement in pure water

Page 29

Main display

6.98 pH : pH measurement

25.0 °C : temperature measurement
S1...S4 : alarm status (invisible if alarm inactive).

Display 2

S1...S4 : alarm status

S1 : activated by a temperature

> 30.0°C

S2 : inactive

: S3 in alarm system

S3 closed by a temperature

< - 20.0°C

S4 : not used

Display 3

Analogue outputs allocation :

measure or temperature.
Display of each output value with a bargraph + mA
indication.

Display 4

Impedance measurement of the glass and reference
electrodes.
Display of a bargraph.
The bargragh limits are those user-programmed in
the IMPEDANCES Menu.

6.98

pH

25.0°C

Disp2 Menu

S1

S2

S3

S4

S1 :
S2 : OK

:

S4 : Not used

Disp3 Main

S1 S3

°C > 30.0

°C < - 20.0

I1 : Measure

I2 : Temp.

6.7 mA

10 m

A

Main

IMPEDANCES

REFERENCE

GLASS

Main

Transmitter 9135 - pH measurement in pure water

Page 30

Display options

Choice of the language

English is the default language. You can choose an
other language available (french, german, italian,
spanish or dutch) by following the procedure below :

• Use the right function key MENU.

• Use the left function key (Select) to select the

menu SERVICE and press (Enter).

• In the menu SERVICE, use the left function key
(Select) to select DISPLAY and press (Enter).

• Select the language of your choice with the right
function key. ”Press (Enter)”.

S/DISPLAY Menu

−

UNIT : choice of the pH measurement unit.

• pH

• mV (pour le redox)

− TEMP. : choice of the temperature

measurement unit.

• °C

• °F

− LANGUAGE : choice of the message language..

• French,

• English,

• German,

• Spanish,

• Italian,

• Dutch.

• Press Esc to go back to the DISPLAY menu.

CALIBRATION
MAINTENANCE
PROGRAMMING

SERVICE

MENU

Select

SERVICE

IMPEDANCES
AVERAGE
AFFICHAGE
CODE
SOFT ISSUE
DEFAULT VAL.
mA ADJUST
FACTORY

SERVICE

Select

DISPLAY

UNIT : pH
TDS : NO
TEMP. : °C
LANGUAGE :

DISPLAY

Select

F

Transmitter 9135 - pH measurement in pure water

Page 31

6. Configuration of the 9135 transmitter

MAIN menu

The main menu gives access to 4 main functions of
the instrument :

• The CALIBRATION menu enables to adjust the
instrument measurement according to the
reference measurements.

• The MAINTENANCE menu enables to intervene
on the instrument.

• The PROGRAMMING menu enables to program
the instrument according to the application.

• The SERVICE menu is reserved to qualified
servicing personal.

CALIBRATION
MAINTENANCE
PROGRAMMING
SERVICE

MENU

Select

Transmitter 9135 - pH measurement in pure water

Page 32

CALIBRATION menu

pH calibration

In calibration mode, the temperature compensation of
the electrodes occurs systematically in the
temperature compensation mode according to the
Nernst law. The temperature measurement remains
active. If the automatic temperature compensation is
selected, immerse the Pt100/1000 in the calibration
solution.

Buffer solutions

The pH of buffer solutions depends on temperature,
the nominal pH values are referred to a temperature of
20°C. For temperatures different from 20°C, NIST
standard buffer solutions, DIN buffers, and pH values
are indicated in the table below :

NIST

Temp Buffer 4,00 Buffer 6,88 Buffer 9,00

0 4,01 6,984 9,464

5 4 6,951 9,395
10 4 6,923 9,332
15 4 6,9 9,276
20 4 6,881 9,225
25 4,01 6,865 9,18
30 4,01 6,853 9,139
35 4,02 6,844 9,102
40 4,03 6,838 9,068
45 4,04 6,834 9,038
50 4,06 6,833 9,01
55 6,833 8,985
60 6,836 8,962
65 6,84 8,941
70 6,845 8,921
75 6,852 8,902
80 6,859 8,884
85 6,867 8,867
90 6,876 8,85
95 6,886 8,833

CALIBRATION

MAINTENANCE
PROGRAMMING
SERVICE

MENU

Select

Transmitter 9135 - pH measurement in pure water

Page 33

DIN 9

Temp Buffer 4,00 Buffer 7,00 Buffer 9,00

0 4,05 7,13 9,24

5 4,04 7,07 9,16
10 4,02 7,05 9,11
15 4,01 7,02 9,05
20 4 7 9
25 4,01 6,98 8,95
30 4,01 6,98 8,91
35 4,01 6,96 8,88
40 4,01 6,85 8,85
45 4,01 6,9 8,82
50 4,01 6,95 8,79
55 4,01 6,95 8,76
60 4,01 6,96 8,73
65 4,01 6,96 8,71
70 4,01 6,96 8,7
75 4,01 6,96 8,68
80 4,01 6,97 8,66
85 4,01 6,97 8,65
90 4,09 6,98 8,64

DIN 10

Temp Buffer 4,00 Buffer 7,00 Buffer 10,00

0 4,05 7,13 10,26

5 4,04 7,07 10,17
10 4,02 7,05 10,11
15 4,01 7,02 10,05
20 4 7 10
25 4,01 6,98 9,94
30 4,01 6,98 9,89
35 4,01 6,96 9,84
40 4,01 6,85 9,82
45 4,01 6,9 9,78
50 4,01 6,95 9,74
55 4,01 6,95 9,7
60 4,01 6,96 9,67
65 4,01 6,96 9,65
70 4,01 6,96 9,62
75 4,01 6,96 9,58
80 4,01 6,97 9,55
85 4,01 6,97 9,52
90 4,01 6,98 9,49

Transmitter 9135 - pH measurement in pure water

Page 34

The temperature of the buffer solution needs to be
entered only if the transmitter is operated in the
manual temperature-compensation mode.

In the « automatic calibration » mode the transmitter
determines the pH value according to the temperature.
In the other calibration modes, the nominal pH values
must always be taken into account.

For a precise calibration of the pH electrode, 2 buffer
solutions are required one of which should have a pH
close to the sample pH. The pH 7 buffer solution (or

6.88 à 25°C) ) is required for a first standardization
and a pH 4 buffer solution (or 4.01 to 25°C) or pH 10
(or 9.22 to 25°C) is required to calibrate the electrode
slope.

Choice of the calibration type

Different calibration types may be selected. In the
CALIBRATION menu :

• Press CHOICE to select pH standard.

• Press Enter.

• Press CHOICE to select PROGRAMMING.

• With the right function key, choose the calibration

type.

Automatic calibration

With the right function key, select the buffer type you
use so that the instrument determines precisely the
buffer value according to the temperature.

You have the choice between three tables : NIST,
DIN 9, DIN 10 which corresponds to the standard
buffer values whose value varies according to the
temperature as indicated in the previous chapter
dedicated to the buffer solutions.

TYPE :

TAMP : NIST

pH CALIB.

A

uto

Transmitter 9135 - pH measurement in pure water

Page 35

The user calibrates the pH measurement with 2 of the
3 standard buffers from the table chosen :

− NIST : 4.00, 6.88, 9.22

− DIN 9 : 4.00, 7.00, 9.00

− DIN 10 : 4.00, 7.00, 10.00

The user does not enter any value during calibration.

2 point calibration

Calibration type used when the user has no standard
buffer (4.00/6.88/9.22). The buffer value remains the
same to a constant temperature and the user enters
them only one time when he programs the calibration.

Process calibration

Note :

Warning ! This calibration is only active on the
zero shift.

The user calibrates on one point using 1 buffer or the
sample to measure. The user needs to enter the buffer
or sample value for each calibration.

Values calibration

The user has calibrated his electrodes in the
laboratory. He programs the slope and zero values
(% of 59.16 mV/pH) he has measured in the
laboratory.

Slope and offset limits

An error message is displayed if the slope is not in­between [70 %, 120 % or offset in-between [-3 pH,
+ 3 pH].

See Chapter error messages and Troubleshooting.

TYPE :

BUF1 : 3.75 pH

BUF2 : 8.05 pH

pH CALIB.

2pts

Select

TYPE :

pH CALIB.

Process

TYPE :

SLOPE : 102 %

OFFSET : 00.12 pH

pH CALIB.

Valeurs

Select

Transmitter 9135 - pH measurement in pure water

Page 36

Temperature calibration

To reach the temperature calibration screen, press the
EXECUTION mode with ENTER.

Once the measurement is stable, press OK.

You can change the temperature value since the
screen.

Display of motion.

Note :

The temperature adjustment limits are between

- 50°C et + 20°C.

TEMP. CALIB.

EXECUTION

ΔT : - 2,5°C

Press

ENTER

TEMP. CALIB.

6.8

°C

4.2 pH

TEMP. CALIB.

6.8

°C

06.8°C

TEMP. CALIB.

Transmitter 9135 - pH measurement in pure water

Page 37

Calibration proceedings example

Manual calibration, automatic temperature
compensation mode

Proceed as follows (refer also to Fig 6.1 on page 37):

• Stop circulation of the sample.

Buffer 1

• Maintain the screw nut in position and unscrew the
chamber (A).

• Empty out the water contained in the chamber,
and rinse with demineralised water.

• Refill with a fresh buffer (B) pH 7.00 (or 6.88 at
25°C), re-screw the nut (C).

• Validate by Enter.

• No calibrated pH measure is displayed.

• Press OK when the measure is constant.

Note :

Press ESC to quit the calibration.

• The temperature indication disappears and the pH
measure appears.

• The measured temperature by means of the 8362
temperature probe system allows to adjust the
value of the buffer solution.

• Utilize the to change a digit and press
Enter. Press directly Enter to not change a digit.

• After the last number, press Enter to validate the
calibration.

BUFFER 1

Press

ENTER

pH CALIB.

6.98

pH

06 . 98 pH

pH CALIB.

0

Transmitter 9135 - pH measurement in pure water

Page 38

Buffer 2

• Maintain the screw nut in position and unscrew the
chamber (A).

• Empty out the water contained in the chamber,
and rinse with demineralised water.

• Refill with a fresh buffer (B) pH 9.00, re-screw the
nut (C).

• Validate by Enter.

• The temperature indication disappears and the pH

measure appears.

• The measured temperature by means of the 8362
temperature probe system allows to adjust the
value of the reference solution.

• Utilize the to change a digit and press
Enter. Press directly Enter to not change a digit.

• After the last number, press Enter to validate the
calibration.

• Calibration parameters are displayed.

• Put the calibration date.

Press on to select the first digit.
Utilize to change a digit and validate by

Enter.

• Press Enter after validation of the last digit of the
year. Press another time Enter to validate the
calibration parameters.

Note :

If you quit with out validate the calibration
parameters, the transmitter will set the last

calibration and not yours.

BUFFER 2

Press

ENTER

pH CALIB.

6.98

pH

06 . 98 pH

pH CALIB.

0

Transmitter 9135 - pH measurement in pure water

Page 39

• Maintain the screw nut in position and unscrew the
chamber (A).

• Empty out the water contained in the chamber,
and rinse with demineralised water.

• Rinse carefully the electrodes with demineralised
water.

• Put the chamber (A) in position with the
imperviousness flange.

• Regenerate the circulation of the sample to his
nominal flaw. Wait 30 minutes before measuring
the real pH value.

Fig. 6.1 Calibration of the measure system

Transmitter 9135 - pH measurement in pure water

Page 40

PARAMETERS Menu

The date, slope and zero of the last calibration may
be displayed in the PARAMETERS menu.

HISTORIC Menu

The slope and zero parameters of the last two
calibrations may be displayed in the historic menu.

Press the left function key SELECT to display the next
parameters.

MAINTENANCE Menu

When changing an electrode or servicing the
instrument, the transmitter continues to display
measures.

Note :

The analogue output value is the value
programmed in the mA menu. The relay state is

not modified.

DATE : 26/03/96
SLOPE : 95%
ZERO : 0,3 pH

ΔT : 0,2°C

PARAMETERS

DATE : 26/03/96
SLOPE : 98%
ZERO : -0,3 pH

HISTORIC

Select.

6.98

pH

26.4 °C

MAINTENANCE

Transmitter 9135 - pH measurement in pure water

Page 41

PROGRAMMING Menu

Note :

Warning ! An access code may be required if

programmed.

This menu enables the configuration of the instrument
according to its application.

In this operating mode, the measurements, the
analogue outputs and alarms remain active.

ALARMS
CONTROLLER
mA OUTPUTS
RS485

PROGRAMMING

Select

MEASURE

Transmitter 9135 - pH measurement in pure water

Page 42

S/MEASURE Menu

ELECTRODE menu allows to set up the electrode

model.

COMP. TEMP menu allows to set up the temperature
compensation.

ELECTRODE

Choice of the electrode.

TYPE : • Glass

• Sb

• Redox

• Other

ISO Pt : XX,XX pH

The isothermal point corresponds to

the pH value which does not vary
according to the temperature.

SLOPE : XX %

Indication of the electrode sensitivity in

% of the theoric value (59,16 mV/pH at
25°C).

Uiso : XXXX mV

Uiso is the potential of the isothermal

point.

TEMP. COMP. :

MEASURE

Select

ELECTRODE

TYPE :

ISO Pt : 1,5 pH

SLOPE : 95 %

Uiso : 200 mV

ELECTRODE

Other

Transmitter 9135 - pH measurement in pure water

Page 43

TEMP. COMP.

This menu allows to set up the temperature
compensation.

MEASURE :

- No

- Pt

Choice of a temperature
measurement with or without
Pt100 / Pt1000.

TYPE :

- Auto.

- Manual

Choice between an automatic or
a manual temperature measu­rement.

TEMP. :

XX °C Possibility to enter the sample

temperature in a manual
compensation.

COMP. :

-

NERNST

Choice of the temperature
compensation type :

- linear compensation
(0.1984 mV/°C).

- Pure - compensation according to the
ultrapure water curve.

- Matrix 1 - compensation according to the
sulphate curve (4.84 mg/l
corresponds to a pH 4.0 to
25°C).

- Matrix 2 - compensation according to the
ammoniac/hydrazine curve
(0.272 mg/l ammoniac + 20 µg/l
corresponds to a pH 9.0 to
25°C).

- Matrix 3 - compensation according to the
ammoniac / morpholine /
hydrazine curve (1.832 mg/l
ammoniac + 10 mg/l morpholine
+ 50 µg/l hydrazine corresponds
to a pH 9.6 to 25°C).

- Matrix 4 - compensation according to the
phosphate curve (3 mg/l
phosphates + 0.3 mg/l
ammoniac).

Coeff. - ajustable coefficient (pH/10°C).

Δ :

XX In the case of a programmable

coefficient, possibility to enter
the value of the coefficient
(value in pH/10°C or pH/18°F).

MAESURE :

TYPE : Manual

TEMP. : 20°C

COMP. : Coeff.

Δ. : 00.010 pH

TEMP. COMP.

Select

Yes

Transmitter 9135 - pH measurement in pure water

Page 44

S/mA OUTPUTS Menu

This menu allows to adjust analogue outputs.

OUTPUT 1/2

− AFFECT. : choice if the analogue output

allocated to measure or
temperature.

• pH/mV

• °C/°F

− TYPE : choice of the analogue output type.

• 0/20 mA

• 4/20 mA

− LOWER : lower limit value programming.

− UPPER : upper limit value programming.

OUTPUT 1
OUTPUT 2
SPECIAL PROG.
TEST

mA OUTPUTS

Select

AFFECT. :

TYPE : 0/20 mA

LOWER : 10.0 mS

UPPER : 20.0 mS

OUTPUT 1/2

Select

pH

Transmitter 9135 - pH measurement in pure water

Page 45

S/SPECIAL PROG. Menu

This screen allow to adjust 4.20 mA outputs states in
special events :

− MAINTENANCE

− CALIBRATION

− SYST. ALARM

− TIMER

− MODE : choice of a preset value during

calibration, alarm system or
maintenance.

• last

• preset

• live

− VALUE : indication of the preset value 0 to

21 mA.

TEST

TEST menu test the analogue outputs by step of 1 mA
(0…21mA).

MODE :

VALUE : 00 mA

SPECIAL PROG.

Select

Preset

CALIBRATION

SYST. ALARM

TIMER

SPECIAL PROG.

Select

MAINTENANCE

VALUE :

TEST

Select

12 mA

Transmitter 9135 - pH measurement in pure water

Page 46

S/ALARMS Menu

This sub-menu allows to reach the configuration of
alarms 1 to 4.

The MODE parameter allows to choose the operating
mode of the 4 alarms :

- Lim : alarms 1...4

- System : only alarm 3

- Timer : only alarm 4

MODE : • No

• Lim

• Syst

• Timer

ALARM 1
ALARM 2
ALARM 3
ALARM 4

ALARMS

Select

MODE : Syst

ACCEPT : Manu

RELAY : NO

ALARM 3

Select

Syst

MODE : Timer

INTERV : 2440 mn

Impul. Nb : 1

Ton : 005 s

Toff : 005 s

TmA : 00 mn

ALARM 4

Select

Timer

Transmitter 9135 - pH measurement in pure water

Page 47

ALARM 1/2 (limit)

− AFFECT. : choice of a limit on the measure or

the temperature.

• no

• pH/mV

• °C/°F

− LIMIT : value of the limit.

− DIR : choice of the direction

• Up

• Down

− DELAY : definition of the temporization when

the relay interlocking in seconde.

− HYST : definition of the limit hysteresis

thresholds on % (10% max).

− RELAY : choice of the relays normally open

or closed.

• NO

• NF

AFFECT. : Non
LIMIT : 20.3°C
DIR : Up
DELAY : 30s
HYST. : 10%
RELAY : NO

ALARM 1

Select

°C/°F

AFFECT. : Non

ALARM 2

Select

NO

Transmitter 9135 - pH measurement in pure water

Page 48

ALARM 3 (Alarm system)

− Choice of a limit on the measure or alarm system

with alarm 3.

MODE : • No

• Limit

• Syst.

− Manual or automatic acquit possible with the alarm

system.

ACCEPT : • Auto

• Manu

− Choice between relays normally open or closed.

RELAY : • NO

• NC

ALARM 4 (Timer)

− Choice between a limit on the measure or a timer

for the probe cleaning with alarm 4.

MODE : • No

• Seuil

• Timer

− INTERV : interval between 2 cleaning cycles

in minutes.

− IMPUL. Nb : number of pulses during a cleaning

cycle.

− Ton : time when relay is activated, in

secondes.

− Toff : time when relay is desactivated, in

secondes.

− TmA : analog output hold time for the

analogue outputs in minutes.

MODE : Syst

ACCEPT. : Manu

RELAY : NO

ALARM 3

Select

Syst

MODE : Timer

INTERV : 2440 mn

Impul. Nb : 1

Ton : 005 s

Toff : 005 s

TmA : 00 mn

ALARM 4

Select

Timer

Transmitter 9135 - pH measurement in pure water

Page 49

S/CONTROLLER Menu

The built-in proportional controller, abbreviation
controller P. The controller output Y activates the limit
switch relays. Y value may correspond to a control by
impulse or a control by frequency. The Y value is
determined by the parameters below :

• A setpoint (W) : corresponds to the pH value to
control.

• Within this neutral band the control element (valve,
dosing pump) is always inactive.

• A proportional band (XP) : represents the
regulation slope. A XP value equal to 100% is
defined as a Y controlling value of 100% for a 5 pH
(or 1000 V in redox) drift according to the neutral
zone extremity.

• A power factor (Exponent) : which calculates a
controlling value from a lineary (exponent = 1) or
an exponential function.

The value of Y in pH corresponds to the equation
below :

5

])

2

ZN

+(W-pH[

*

XP

100

=Y

Exponent

Y value is represented as follows :

ZN

14.0 pH
+1500 m V

0.0 pH

-150 0 mV

(XP=100%)

(XP=200%)

2.5

pH

(XP=50%)

100%

50%

0%

0.0

5.0

W

Y

Transmitter 9135 - pH measurement in pure water

Page 50

Different controller modes are available. They enable a
frequency, a pulse or a mixed pulse/frequency control.
Relay S1 (base injection) and relay S2 (acid injection)
ensure the control. The controller parameters are
programmable via the programming variables below.

CONTROLLER

− Choice to use an integrated controller :

CNTRLLER : • Yes

• No

− Choice of the control mode :

MODE : • Pulse S1 & S2 in pulse control

• Freq. S1 & S2 in frequency

control

• Pul./Frq. S1 in pulse control /S2
in frequency control

• Frq./Pul. S1 in frequency control
/S2 in pulse control

− Value of the setpoint :

POINT : XXXX - In pH or mV

− Neutral zone range : zone around the setpoint

where the regulation is not activated

NEUT Z. : XXX - In pH or mV

− Reaction time after activating relays S1 or S2 :

delay time after executing the next period.

INERTIA : XXX – In s

− Maximum time out of the neutral zone .After this

period and without returning into the neutral zone,
the system alarm “control too long” is activated.

CTL. TIME : XX – In mn

CNTRLLR : Yes
MODE : Freq.
POINT : 7.00 pH
NEUT. Z. : 2.0 pH
INERTIA : 000 s
CTL. TIME : 20 mn
RELAY S1
RELAY S2
MANUAL MODE

CONTROLLER

Select

Transmitter 9135 - pH measurement in pure water

Page 51

Note :

Any default detected by the transmitter stops the
controller function.

The default "CONTROL TOO LONG" should be
manually released by pressing ENTER.

If the TIMER and CONTROLLER functions are
activated at the same time, the controller is
stopped during the timer cycle.

Any cycle calculated by the transmitter is carried

out to the end.

FREQUENCY CONTROL :

The pulse width is constant and programmable (0.1 to

0.7 s). The pulse period varies according to the
sample pH value.

Off

TT

T

Time

On

S3

Period ?

T

Transmitter 9135 - pH measurement in pure water

Page 52

S1 & S2 RELAYS

− Proportionality coefficient : slope of regulation :

COEF.XP1/2 : XXX – In %

− Value of the pulse width (0,1 < T < 0,7) :

T1/2 : XXX – In %

− Minimum number of pulses per minute. Program

this value according to the control system
associated to the relay :

MIN : XXX – In i/min

− Maximum number of pulses per minute. Program

this value according to the control system
associated to the relay :

MAX : XXX – In i/min

MANUAL MODE

− Force relay S1 or S2. Pressing the function key

associated to the relay, the relay is activated till
you release the key. The corresponding icon is
displayed according to the relay state.

PULSE CONTROL :

The pulse period is constant and programmable (3 to
60 s). It is the cycle quotient (α) which varies
according to the sample pH value.

Off

On

"

?

"

?

"

?

S3

TTT

COEF.XP1 : 100%
T1 : 2.00 s
MIN : 001 i/min
MAX : 200 i/min

RELAY S1

Select

COEF.XP2 : 100%
T2 : 2.00 s
MIN : 001 i/min
MAX : 200 i/min

RELAY S2

Select

7.00

pH

25.0 °C

MANUAL MODE

S2 S1

Time

Transmitter 9135 - pH measurement in pure water

Page 53

CONTROLLER

− Regulation form select

MODE : Pulse

S1 & S2 RELAYS

− Value of the pulse period (3 < T < 60) :

T1/2 : XXX In s

− Minimum activation time of the relay :

S1/2 MIN : XXX In s

− Value of the power factor. In the case of a non-

linear calculation of the control value, modify the
exponent value. This modification allows a greater
correction of the measurement when it is far from
the setpoint.

"PULSE/FREQUENCY" CONTROL OR
"FREQUENCY/PULSE" CONTROL

The controller may be programmed in a mixed mode.
Use the Mode command for the programming. See
paragraphs concerning the frequency control and the

pulse control to program the relay S1 and S2.

CNTRLLR : Yes
MODE : Imp.
POINT : 7.00 pH
NEUT Z. : 2.0 pH
INERTIA : 000 s
CTL TIME : 20 mn
RELAY S1
RELAY S2
MANUAL MODE

CONTROLLER

Select

MODE : Pulse

COEF.XP1 : 100%
T1 : 2.00 s
S1 MIN : 1.0 s
EXPONENT : 01.0

RELAY S1

Select

COEF.XP2 : 100%
T2 : 2.00 s
S2 MIN : 1.0 s
EXPONENT : 01.0

RELAY S2

Select

Transmitter 9135 - pH measurement in pure water

Page 54

S/RS485 Menu

This option requires the RS485 kit.

N° Monec number (0...32)

BAUD 300/600/1200/2400/4800/9600/19200
Transmission speed in bauds

PARITY - Without parity bit : No

- With odd parity bit : Odd

- With even parity bit : Even

STOP BIT - 1 bit stop

- 2 bits stop

SWAP WORD - Allow to reverse the "strong weight",

"light weight" size during the
manipulation of the ceal variable
(float type). Some equipments need
this reverse to read correctly the teal
size data.

The communication protocol is MODBUS/JBUS.

The instrument may be equipped with a RS485 board
(optional) (see MODBUS 9100 manual).

N° : 4
BAUD : 9600
PARITY : Odd
STOP BIT : 1
WORD invs. : YES

RS485

4

Transmitter 9135 - pH measurement in pure water

Page 55

SERVICE Menu

Note :

An access code may be required if it has been
programmed.

This screen allows to reach the 9135 transmitter
configuration screens.

The display options are detailed page 28.

IMPEDANCES
AVERAGE
DISPLAY
CODE
SOFT ISSUE
DEFAULT VAL
mA ADJUST
FACTORY

SERVICE

Select

Transmitter 9135 - pH measurement in pure water

Page 56

S/AVERAGE Menu

Program a sliding average on the pH/redox
measurement.

AVERAGE : define the number of measures to

calculate the average.

TEST : visualize the difference between a

measure done with or without average.

Note :

The measurement cycle lasts 4 seconds if there is
a temperature measurement and only 2 seconds
without temperature measurement.

S/DISPLAY Menu

This menu options are describes in page 28 of this
manual.

AVERAGE : 9

TEST :

AVERAGE

Select

TEST :

AVERAGE

6.98 pH

REAL

6.58 pH

TEST

Transmitter 9135 - pH measurement in pure water

Page 57

S/CODE Menu

−

CALIB. : access code for "temperature and

pH calibrations" menu.

− PROG. : access code for "Programming"

menu.

− SERVICE : access code for "service" menu.

Note :

If you have forgotten your access code, press
simultaneously ESC and ENTER to enter into the
menu.

CALIB. :

PROG. : 0000

SERVICE : 0000

CODE

Select

0000

Transmitter 9135 - pH measurement in pure water

Page 58

S/SOFT ISSUE Menu

The transmitter displays the type of instrument and the
software version installed.

S/DEFAULT/VALUES Menu

Note :

If you press YES, you load the default values and
you loose the programmed values and the
calibration parameters.

MONEC 9135

pH X.XX

VERSION

Chargement

valeurs

par défaut ?

VAL./DEFAUT

Oui

!

Loading

values

default ?

DEFAULT/VAL.

Yes

!

Transmitter 9135 - pH measurement in pure water

Page 59

S/mA ADJUST Menu

This menu adjustment of the analogue outputs to
20 mA with an internal coefficient between

-9999...9999.

S/FACTORY Menu

Factory code necessary.

The user has no access to this menu.

OUTPUT 1

OUTPUT 2

mA ADJUST

Select

VALUE : 0000

OUTPUT 1/2

- +

Transmitter 9135 - pH measurement in pure water

Page 61

7. Failures detection and error messages

Failures detection

Symptom Possible

cause

Remedy

Reading out of
scale

Faulty
transmitter

Check the transmitter by connecting a
pH simulator or a voltage generator
instead of the electrode

Faulty

electrode

Check the electrode operation with
buffer solutions

Electrode not

correctly
connected

Check the connections

Bubbles in the

bulb

Remove the electrode, shake it and put
it back

Unstable display

Faulty
transmitter

Check the transmitter by connecting a
pH simulator or a voltage generator
instead of the electrode

Solution not

earth grounded

Connect the electrode

Bubbles on the

pH bulb

Remove the electrode, shake it and put
it back

Slow drift

PH bulb
polluted

See cleaning instructions

Reference

clogged

See cleaning instructions

Low slope or
slow response

Buffers
polluted

Use new buffers

PH bulb

polluted

See cleaning instructions

Reference

clogged

See cleaning instructions

Faulty

electrode

Check the electrode operation

Transmitter 9135 - pH measurement in pure water

Page 62

Electrode cleaning

Electrodes which are mechanically undamaged,
without any broken part, may be regenerated
according to the instructions below :

Salt deposits: Dissolve the deposit by immersing the
electrode in 0.1 M from HCL during 5 minutes,
following by an immersion of 5 minutes in a 0.1 M of
NaOH and rinse abundantly with demineralised water.

Grease/Oil : Clean the electrode bulb with detergent
and water. Rinse the extremity of the electrode with
demineralised water.

Reference electrode junction clogged :

Heat a KCl

solution diluted to 60-80

o

C. Place the clogged part in
the hot solution during 10 minutes. Cool the electrode
in a cold KCL solution.

If these advice do not ensure a normal response time,
change the electrode.

Maintenance

No particular maintenance required. Clean the
instrument with a soft tissue and without any
aggressive agent.

Error messages

Note :

In manual acquittal, to suppress an error message

press ENTER after correcting the default.

Transmitter 9135 - pH measurement in pure water

Page 63

ERROR MESSAGE DESCRIPTION/POSSIBLE CAUSE

• Sensor not correctly connected.
Temperature sensor damaged
Replace it if necessary.

• Sensor not correctly connected.
Temperature sensor damaged
Replace it if necessary.

• The pH value is inferior to - 3 pH.

• The pH value is superior to 14 pH.

• The glass electrode impedance is superior to the limits

set by the user. It is required to :

- change the limits or,

- clean or change the clogged electrode.

10.8

pH

Pt100/Pt1000

SHORT-CIRCUIT

11.4

pH

Pt100/Pt1000

OPEN CIRCUIT

1.4

pH

MEASURE

TOO LOW

13.4

pH

MEASURE
TOO HIGH

10.3

pH

GLASS IMPED.

TOO HIGH

Transmitter 9135 - pH measurement in pure water

Page 64

The glass electrode impedance is inferior to the limits
set by the user. It is required to :

- change the limits or,

- change the broken electrode.

The reference electrode impedance is inferior to the
limits set by the user. It is required to :

- change the limits or,

- change the damaged electrode.

The reference electrode impedance is superior to the
limits set by the user. It is required to :

- change the limits or,

- clean the clogged electrode or change the poisoned
electrode.

The time out of the neutral zone is superior to the limit
programmed by the user. It is required to :

- change the limits or,

- check the relays S1 and S2.

7.9

pH

GLASS IMPED.

TOO LOW

10.1

pH

REF. IMPED.

TOO LOW

6.4

pH

REF. IMPED.

TOO HIGH

5.8

pH

REGULATION

TOO LONG

Transmitter 9135 - pH measurement in pure water

Page 65

ERROR MESSAGES DURING A CALIBRATION

NOTE : Press ESC to leave the menu and calibrate again.

OFFSET

OUT OF LIMITS

SLOPE : 99,9%

ZERO : 4.00 pH

PH CALIB.

The zero shift is superior to the limit
programmed.

Limits

:

- pH calibration : 3 pH

- redox calibration : 250 mV

SLOPE

OUT OF LIMITS

SLOPE : 130%

ZERO : 0.1 pH

PH CALIB.

The slope shift is superior to the limit
programmed.

Limits : 70...120 %

)T

OUT OF LIMITS

PH CALIB.

)T : +25.0°C

)T

OUT OF LIMITS

PH CALIB.

)T : +25.0°C

The temperature drift is superior to the limit
programmed.

Limits : - 50°C/ +20°C

Δ

ΔT : +25.0°C

Transmitter 9135 - pH measurement in pure water

Page 67

8. Analogue outputs and temperature control

Analogue outputs control

An external socket from the transmitter (for certain
versions) fixed on the lower part of the front panel
allows to measure the value of the analogue output
current by inserting a miliampere-meter in the current
loop.

Figure 1 : Special control cable for analogue outputs

A special cable (figure 1, Ref : 09125=A=8010),
provided as an option , gives access, when connected,
to the following signals :

I1+: brown flex

I1- : yellow flex

I2+ : white flex

I2- : green flex

Reading in mA between the yellow and brown wires
gives the current value of output 1.

Reading in mA between the white and green wires
gives the current value of output 2.

Transmitter 9135 - pH measurement in pure water

Page 68

Pt100 simulator connections

The transmitter can be connected to a Pt100 simulator
by means of the cable (Ref : 09125=A=8010) :

Temp + : white flex

Temp - : yellow flex

pH simulator connections

pH simulator can be connected to the electrode
connection cable by means of another cable (Ref :
09135=A=8030).

Simulation measure
red plug

Shield cable L = 30 cm

Simulation reference
black plug

SK9 screw for connection
on pH-probe cable

Glass electrode imput : red plug

Reference imput : black plug

Transmitter 9135 - pH measurement in pure water

Page A1

Appendix A : Default values

CALIBRATION

pH CALIB.

TYPE : Auto

PARAMETERS

DATE : 01/01/01
SLOPE : 100.0%
OFFSET : 0.00 pH

ΔT : 0.0 °C

PROGRAMMING

MEASURE

ELECTRODE
TYPE : Glass

TEMP.COMP.

MEASURE : No
TEMP. : 25°C
COMP. : Nernst

ALARMS

ALARMS S1...S4

AFFECT. : pH
LIMIT : 0.00 pH
DIR. : Bas
DELAY. : 000 s
HYST. : 00%
RELAY : NO

mA OUTPUTS

OUTPUT 1

AFFECT. : pH
TYPE : 4-20
LOWER : 00.00 pH
UPPER : 14.00 pH

OUTPUT 2

AFFECT. : pH
TYPE : 4-20
LOWER : 00.00 pH
UPPER : 14.00 pH

SPECIAL PROG.

MAINTENANCE

MODE : Last

TIMER

MODE : Last

CALIBRATION

MODE : Last

SYST. ALARM

MODE : Last

Transmitter 9135 - pH measurement in pure water

Page A2

RS485

No : 1
BAUD : 19200
PARITY : No
STOP BIT : 1

WORD invs. : YES

NO

SERVICE

IMPEDANCES

FREQUENCE : 24.0 H
GLASS

GLASS : No

REFERENCE

REFERENCE : No

AVERAGE

AVERAGE : 0

DISPLAY

DISPLAY

RES. : 0.01 pH
UNIT : °C
LANGUAGE : GB

CODE

CODE

CALIB. : 0000
PROG. : 0000
SERVICE : 0000

Transmitter 9135 - pH measurement in pure water

Page B1

Appendix B : Spare parts list

Any other spare parts except those below in the table should be replaced in
the instrument.

Part number Description

09125=A=1001 9135 equipped CPU board

09135=A=1500 9135 complete pH module

09125=A=2000 9135 power supply (standard version)

09125=A=2020 9135 power supply (low voltage version)

09125=A=4000 Relay board (option)

09125=A=1101 RS485 board (option)

09125=A=2485 RS485 kit (JBUS/MODBUS manual + board)

09125=C=3000 Mounted transmitter housing

425=110=002 Shutter PG 11 for P.E

425=110=221 Cable gland PG 11

425=130=002 Shutter PG 13,5 for P.E

425=135=222 Cable gland PG 13,5

428=112=025 Gasket 11.2 x 2.55 mm (EPDM) for 8361/8362 pH probes

429=600=400 Gasket DN40 (EPDM) for 8362 pH probe

351=007=001 Strap FLEXPAC 7 PTS

621=083=062 French instruction manual

621=991=000 JBUS/MODBUS communication manual

08362=A=2000 pH electrode

359016,10110 pH electrode’s 3 m cable

359016,10120 pH electrode’s 10 m cable

359016,10122 pH electrode’s 20 m cable

Transmitter 9135 - pH measurement in pure water

Page B2

09125=A=8010 Pt100/1000’s simulator connections cable

09135=A=8030 Low impedance pH’s simulator connections cable

08362=A=1001 Pt100’s temperature sensor

08362=A=3001 Pt100’s 3 m cable

08362=A=3002 Pt100’s 10 m cable

08362=A=3003 Pt100’s 20 m cable

08362=A=4000 2 connections (1/8" NPT, for 6 mm outer diameter tube)

363130, 00500 pH 4 solution (500 ml)

363131, 00500 pH 6.88 solution (500 ml)

363132, 00500 pH 9.22 solution (500 ml)

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Tel. [phone]
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