Thermo orion 135A, 136S Instruction Manual

Instruction Manual

Models 135A and 136S
Waterproof and Intrinsically Safe
Portable Conductivity Meters

Software V ersion: 1.x

TA–193.204–ORE02 260201

AQUAfast, Cahn, ionplus, KNIpHE, ORION, PerpHecT, perpHecTion, Sens­ing the future, SensorLink, Sure-Flow, Titrator PLUS and TURBO2 are reg­istered trademarks of Thermo Orion.

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E Copyright 1999, Thermo Orion. All rights reserved.
The specifications, descriptions, drawings, ordering information and part

numbers within this document are subject to change without notice.
This publication supersedes all previous publications on this subject.

Models 135A and 136S Portable Conductivity Meters

Information III

Safety Precautions

Be sure to read and follow these instructions !

The Model 136S Conductivity Meters may only be opened
to change the batteries outside hazardous areas. If repairs
are necessary, the meter must be sent in to the factory.

Never operate the remote interface or printer within haz­ardous areas.

When using the meter in hazardous areas, watch for elec­trostatic charges! For example, never wipe off the meter
with a dry cloth. Observe the relevant regulations concern­ing ESD.

Whenever it is likely that the protection has been impaired, the meter shall
be made inoperative and secured against unintended operation.

The protection is likely to be impaired if, for example:

❏ the meter shows visible damage
❏ the meter fails to perform the intended measurements
❏ after prolonged storage at temperatures above 70 °C
❏ after severe transport stresses

Before recommissioning the meter, a professional routine test according to
EN 61 010-1 shall be performed. This test should be carried out at our fac­tory.

cal

Note

Warning

Information IV

Information on this Instruction Manual

ITALICS are used for texts which appear in the display of
Thermo Orion Model 135A or 136S.

Bold print is used to represent keys, e.g. cal.

Display examples
or

keys whose functions are explained are frequently shown
in the left-hand column.

Notes provide important information which should always
be observed when using the meter .

Warning means that the instructions given must always be
followed for your own safety. Failure to follow these
instructions may result in injuries.

Models 135A and 136S Portable Conductivity Meters

Contents V

Contents

Safety Precautions III. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Information on this Instruction Manual IV. . . . . . . . . . . . . . . . . . . . . . . . . .

1 The Models 135A and 136S Conductivity Meters 1. . . . . . . . . . . . . . .

Package Contents 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Short Description of Meters 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Operation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Meter Design 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Display 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keypad 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connection and Start-up 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuration 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Calibration 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurement 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Data Log Memory 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Data Log 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Clock Mode 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Serial Interface 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Standard Setting for PRT300 Printer 22. . . . . . . . . . . . . . . . . . . . . . .

Configuring the PRT300 Printer 22. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Printing Measured Values and GLPdoct Report 23. . . . . . . . . . . . .

3 Troubleshooting and Maintenance 24. . . . . . . . . . . . . . . . . . . . . . . . . . .

Error Messages 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing batteries 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cleaning the meter 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents VI

Appendix 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Declarations of Conformity 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Certificate of Conformity 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Drawing 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ordering Information 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications for PRT300 Printer 40. . . . . . . . . . . . . . . . . . . . . . . . . .

Warranty 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Technical Terms 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Models 135A and 136S Portable Conductivity Meters

Models 135A and 136S 1

1 The Models 135A and 136S

Conductivity Meters

Package Contents

Please check the completeness of the shipment after un­packing.
The package should include:

❏ Thermo Orion Model 135A or 136S Conductivity Meter

(ready for operation)

❏ Neck strap
❏ This instruction manual
❏ Quickstart instructions
❏ Interface cable with adapter for printer and PC
❏ PC software

Short Description of Meters

❏ The Models 135A and 136S measure conductivity, sali-

nity, TDS and temperature in industry, the environment,
food processing and waste-water treatment.

❏ Operation of the Model 136S is also permitted in Zone 1

hazardous areas.

❏ The meters meet the European EMC regulations

(89-336-EEC) and the recommendations of NAMUR
NE 21.

❏ The meters are IP 66 protected to EN 60 529.

Warning

Models 135A and 136S 2

❏ T emperature compensation is automatic with a conducti-

vity probe with integral temperature sensor or a sepa­rate ATC probe, or the temperature may be manually
entered.

❏ Calibration can be carried out by directly entering the

cell constants, by calibrating with Thermo Orion Con­ductivity Standards, or with any other buffer solutions.

❏ The data log records up to 100 measured values with

the temperature, date and time. Recording takes place
either manually, interval or event-controlled.

❏ To minimize battery consumption, the meter switches off

after either one or twelve hours when it is not operated.

❏ Only three alkaline AA batteries are required for uninter-

rupted operation for approx. 1,000 hours.

❏ PC software allows complete remote control of the me-

ter via PC. All measured values and parameters can be
read out and easily processed further (e.g. using Micro­soft Excel).

❏ Measured values and GLPdoct can also be sent di-

rectly to a printer via the serial interface.

Never use the remote interface to PC or printer in hazard­ous areas!

Models 135A and 136S Portable Conductivity Meters

Operation 3

2 Operation

Meter Design

1

2

3

4

5

1 Sensor connection
2, 3 Separate temperature probe connection
4 PC/printer interface connection
5 Probe holder , removable

meas

cal

STO

RCL

Y

B

print

clock

power

power

meas

Note

cal

Operation 4

Display

Battery
empty

Press
cal key

Wait

Manual
temperature
detection

Temperature
detection
using NTC

Write
memory

Read
memory

Slope
(cell
constant)

Clock

Main
display

Secondary
display

Measure­ment units

Error
message

Keypad

Pressing the power key switches the meter on or off.
After switching on, the meter automatically performs a
self-test and checks for the presence of a temperature
probe. Then it goes into the measuring mode.

Pressing the meas key returns the meter to the measur­ing mode from any function. Pressing the meas key in the
measuring mode displays the following parameters:

Cond measuring mode: temperature compensation
tdS measuring mode: TDS factor

You can also power the meter up using the meas key.
However, only an abbreviated self-test is performed.

Pressing the cal key starts calibration.

Y B

clock

STO

RCL

print

RCL

+

print

cal

+

print

STO

+

clock

STO

+

clock

cal

+

power

Note

Models 135A and 136S Portable Conductivity Meters

Operation 5

With the

Y and B keys you can select and change parame-

ters and select a mode.

Pressing the clock key switches the meter into the clock
mode. All measurement processes are cancelled and the
battery consumption is reduced to a minimum.

Pressing the STO key activates the data logger for writing
measured values.

Pressing the RCL key activates the data logger for reading
measured values.

Pressing the print key sends the currently measured
value to a printer or PC.

Pressing the RCL and print keys prints out the logged
data in memory.

Pressing the cal and print keys prints out the GLPdoct
report.

Pressing the STO and clock keys switches the meter
into the data logger mode.

Pressing the clock and STO keys activates the mode for
setting the date and time.

Pressing the cal and power keys when the meter is
switched off, activates the configuration menu.

When pressing two keys simultaneously, make sure that
the key shown at the left is pressed first.

Connecting
sensor

Connection
assignment

Operation 6

Connection and Start-up

The following sensors from the line of accessories can be
connected to the meter .

013610 4-electrode epoxy/graphite sensor

with integrated temperature probe,
3 meter cable
K = 0.55 /cm

013660 4-electrode epoxy/graphite sensor

with integrated temperature probe,
20 meter cable
K = 0.55 /cm

Connection Socket. . . . . . . . . . . . . . . . . . . . . . . . . . .

Sensor 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Separate temperature probe 2, 3. . . . . . . . . . . . . . .

Interface 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1234

NTC

V–

V+

I+

Shield

NTC

I–

V+
V–

I–

I+

If no temperature probe is used for measurement, the me­ter operates with the manually set temperature and man
appears in the display.

Note

Note

Note

Note

power

Note

Note

Models 135A and 136S Portable Conductivity Meters

Operation 7

When using a sensor with temperature probe, an external
temperature probe may not be connected simultaneously.

If the meter is connected to a PC and is used to take mea­surements in a grounded liquid, measuring errors may
result.

Prior to first use, the cell constant, temperature compensa­tion and time and date must be checked and set, if re­quired.

The calibration and configuration data and the contents of
the data log remain permanently stored both with the meter
switched off and with the batteries removed (battery re­placement).

Pressing the power key switches the meter into measur­ing mode.
When switched on, the meter determines the connected
temperature probe and conducts a self-test:

❏ Simultaneous appearance of all display segments
❏ Display of the model number
❏ Display of the software version

For recognition of the temperature probe, the conductivity
sensor must be connected to the meter before power-up.

The meter can also be switched on with the meas key.
However, only an abbreviated test is performed. The meter
assumes that the last temperature probe determined is
used.

cal

+

power

meas

Function

Operation 8

Configuration

The following basic settings can be changed in the configu­ration:

❏ Function Cond (conductivity), SAL (salinity) or tdS (Total

Dissolved Solids)

❏ Calibration by entering the cell constants (AutCal Off) or

calibration with Thermo Orion Conductivity Standards
(AutCal On)

❏ Autoshutoff after

1 hour or 12 hours

❏ Remote interface

Printer output On/Off, baud rate

❏ T emperature display

°C or °F

❏ Date and time format

24 hours and day, month, year or
12 hours (a.m./p.m.) and month, day, year

To activate the configuration hold down the cal key with
the meter switched off and then press the power key.

The menu items of the configuration menu are worked
through in sequence. Press the Y or B key to change the
setting of the respective menu item. The STO key saves
the parameters and switches to the next menu item.

Pressing the meas key exits the configuration menu at
any time. The value last displayed will not be saved unless
the STO key was pressed.

Select the measuring function Cond (conductivity), SAL
(salinity) or tdS (Total Dissolved Solids).

Automatic
or manual
calibration

Autoshutoff

Interface

Models 135A and 136S Portable Conductivity Meters

Operation 9

Select whether you wish to manually set the cell constant
or calibrate using Thermo Orion Conductivity Standards
and automatic drift check.
(Default setting: Direct entry of the cell constant [AutCAL

OFF])

Direct entry of the cell constants (AutCal OFF) from

0.010 cm

–1

to 199.9 cm–1.

(Default setting 0.475 cm

–1

)

Automatic calibration (AutCAL On) with 0.1 molar KCl solu­tion (Thermo Orion 12.9 mS Conductivity Standard,
Cat. no. 011006), 0.01 molar KCl (Thermo Orion 1413 mS
Conductivity Standard, Cat. no. 011007) or entry of the
temperature-compensated conductivity of another known
calibration solution.

To protect the batteries, the meter switches off automati­cally when not operated for a longer time than specified.
You can select whether shut-off is to take place after one
hour or after twelve hours (default setting: 1 hour).
If the data logger is active and during remote interface
operation, the autoshutoff feature is disabled.

If the meter is controlled with a PC and interface conflicts
occur when the print key is pressed, the print function
should be deactivated (Print OFF).
(Default setting: Print On, 4,800 baud)

The transmission speed can be set to 600, 1,200, 2,400,
4,800 or 9,600 baud.
The transmission speed must correspond to that set in the
printer or PC.
The data format and protocol are permanently set to 7 bit,
one stop bit, even parity and XON/XOFF protocol
(NAMUR NE 28).

Temperature
display

Date and
time
format

Operation 10

The temperature can be displayed either in °C or °F.
(Default setting: °C)

You can choose between the display format 24 hours and
day.month.year and the format 12 hours a.m./p.m. and
month.day.year.

(Default setting: 24 hours and day.month.year)

Calibration
solutions

Clean
sensors

Cell constant

4-electrode
sensors

2-electrode
sensors

Models 135A and 136S Portable Conductivity Meters

Operation 11

Calibration

With calibration the Models 135A and 136S are adjusted to
the cell constants of the sensor .

General information on calibration

Solutions for calibration of conductivity meters are un­buffered systems. Care should be taken to use fresh
conductivity standards and to avoid contamination of the
conductivity standard by water droplets adhering to the
conductivity sensor .

Before calibration, make sure that the conductivity sensor
is clean. Residues should be rinsed off with distilled water.
Afterwards, the sensor should be wiped dry and rinsed with
the calibration solution to be used.

The cell constant is determined by the size and geometric
arrangement of the measuring electrodes. It is the charac­teristic parameter of conductivity sensors. The cell cons­tant changes very little over time.

With 4-electrode sensors the principle of separate current/
voltage electrodes results in virtually no measuring errors
even in the case of partial soiling of the measuring elec­trodes. However, electrodes completely soiled with insulat­ing coatings cause the measurement to fail.

With 2-electrode sensors for the measurement of low con­ductivities, e.g. ultrapure water , calibration should be car­ried out using Thermo Orion 100 mS Conductivity Standard
(Cat. no. 011008).