Multi-3420
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Multi 3420
Operating manual
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Digital pH / D.O. /
conductivity meter
for 2 digital IDS sensors
Multi 3420
Accuracy when
going to press
The use of advanced technology and the high quality standard of our instruments are the result of a continuous development. This may result in differences between this operating manual and your meter. Also, we cannot
guarantee that there are absolutely no errors in this manual. Therefore, we
are sure you will understand that we cannot accept any legal claims resulting
from the data, figures or descriptions.
Copyright
© Weilheim 2011, WTW GmbH
Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim.
Printed in Germany.
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Multi 3420 Contents
Multi 3420 - Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.4 Automatic sensor recognition . . . . . . . . . . . . . . . . . . . . . 12
1.5 IDS sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.6 IDS adapter for analog sensors . . . . . . . . . . . . . . . . . . . 13
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 16
3 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.1 Inserting the rechargeable batteries. . . . . . . . . . 19
3.3.2 Connecting the power pack / charging the
batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3.3 Switching on the meter. . . . . . . . . . . . . . . . . . . . 21
3.3.4 Setting the date and time . . . . . . . . . . . . . . . . . 22
4 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2 Login with a user name. . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3 General operating principles . . . . . . . . . . . . . . . . . . . . . . 26
4.3.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3.2 Display of several sensors in measuring mode . 27
4.3.3 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3.4 Example 1 on navigation: Setting the language. 30
4.3.5 Example 2 on navigation: Setting the date and
time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 34
4.4.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.4.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.4.3 Automatic Stability control . . . . . . . . . . . . . . . . . 36
4.4.4 Automatic switch-off . . . . . . . . . . . . . . . . . . . . . . 36
4.4.5 Display illumination . . . . . . . . . . . . . . . . . . . . . . 36
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Contents Multi 3420
4.5 Sensor info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.6 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.7 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.7.1 General information . . . . . . . . . . . . . . . . . . . . . . 39
4.7.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . 40
4.7.3 Settings for pH measurements . . . . . . . . . . . . . . 42
4.7.4 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.7.5 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 49
4.7.6 Carrying out an automatic calibration (AutoCal) . 50
4.7.7 Carrying out a manual calibration (ConCal) . . . . 54
4.7.8 Displaying calibration records. . . . . . . . . . . . . . . 58
4.7.9 Continuous measurement control (CMC
function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4.7.10 QSC function (sensor quality control) . . . . . . 60
4.8 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.8.1 General information . . . . . . . . . . . . . . . . . . . . . . 63
4.8.2 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 63
4.8.3 Settings for ORP measurements . . . . . . . . . . . . 65
4.9 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.9.1 General information . . . . . . . . . . . . . . . . . . . . . . 66
4.9.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.9.3 Settings for D.O. sensors
(menu or measurement and calibration settings) 70
4.9.4 FDO
®
Check procedure (check of the FDO®
925) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
4.9.5 D.O. calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.9.6 Displaying calibration records. . . . . . . . . . . . . . . 77
4.10 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.10.1 General information . . . . . . . . . . . . . . . . . . . . . . 78
4.10.2 Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.10.3 Temperature compensation . . . . . . . . . . . . . . . . 81
4.10.4 Settings for IDS conductivity sensors . . . . . . . . . 82
4.10.5 Determining the cell constant
(calibration in control standard) . . . . . . . . . . . . . 85
4.10.6 Displaying calibration records. . . . . . . . . . . . . . . 87
4.11 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.11.1 Manual storage. . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.11.2 Automatic storage at intervals . . . . . . . . . . . . 89
4.11.3 Editing the measurement data storage. . . . . . . . 92
4.11.4 Erasing the measurement data storage . . . . . . . 93
4.12 Transmitting data (USB interfaces) . . . . . . . . . . . . . . . . . 94
4.12.1 Outputting current measurement data . . . . . . . . 94
4.12.2 Transmitting data (to a PC). . . . . . . . . . . . . . . . . 94
4.12.3 Connecting the PC / USB-B interface (USB
Device) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
4.12.4 Options for data transmission to a PC (USB-B
interface) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4.12.5 Connecting the USB memory device / USB-A
interface (USB Host) . . . . . . . . . . . . . . . . . . . 96
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Multi 3420 Contents
4.12.6 Data transmission to a USB memory device
(USB-A interface). . . . . . . . . . . . . . . . . . . . . . . . 96
4.13 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.13.1 Resetting the measurement settings. . . . . . . . . 97
4.13.2 Resetting the system settings . . . . . . . . . . . . . . 99
5 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . 101
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
5.1.1 Replacing the rechargeable batteries . . . . . . . 101
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.1 General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.2 pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
6.3 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
6.4 Conductivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
7 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . 110
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
9 Appendix: Firmware update. . . . . . . . . . . . . . . . . . . . 115
9.1 Firmware update for the meter Multi 3420 . . . . . . . . . . 115
9.2 Firmware-Update for IDS Sensors . . . . . . . . . . . . . . . . 116
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Contents Multi 3420
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Multi 3420 Overview
1
2
3
1Overview
The compact, digital precision meter Multi 3420 enables you to carry
out pH measurements, ORP measurements, conductivity measurements and dissolved oxygen (D.O.) measurements quickly and reliably.
The Multi 3420 provides the maximum degree of operating comfort,
reliability and measuring certainty for all applications.
The Multi 3420 supports you in your work with the following functions:
z proven calibration procedures
z automatic stability control (AR),
z automatic sensor recognition,
z CMC (continuous measurement control)
z QSC (sensor quality control).
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1 Keypad
2 Display
3 Socket field
7
Overview Multi 3420
M
pH 3420
F1
F2
ARCAL
PRT ESCRCLSTO
MENU
ENTER
MENU
ENTER
F1
F2
CAL
ARAR
The two USB interfaces (USB-A and USB-B) enable you to:
z Transmit data to
– a USB memory device
–a PC
z Update the meter firmware.
1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <MENU/ENTER>) generally indicates a short
keystroke (under 2 sec) in this operating manual. A long keystroke
(approx. 2 sec) is indicated by the underscore behind the key symbol
<F1>:
<F2>:
(e.g. <MENU/ENTER
Softkeys providing situation dependent functions, e.g.:
<F1>/[Info]: View information on a sensor
_>).
<On/Off>: Switches the meter on or off
<M>: Selects the measured parameter
<CAL>:
<CAL
_>:
Calls up the calibration procedure
Displays the calibration data
<AR> Freezes the measured value (HOLD function)
Switches the AutoRead measurement on or off
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Multi 3420 Overview
MENU
ENTER
MENU
ENTER
PRT
4
3
2
6
7
8
1
5
22.09.2009 08:00
Info
<STO>:
<STO
_>:
<RCL>:
<RCL
_>:
<S><T>:
<W><X>:
<MENU/ENTER>:
<MENU/ENTER
<PRT>
_>
<PRT
_>:
1.2 Display
Saves a measured value manually
Opens the menu for the automatic save function
Displays the manually stored measured values
Displays the automatically stored measured values
Menu control, navigation
Opens the menu for measurement settings / Confirms
entries
Opens the menu for system settings
Outputs stored data to the interface
Outputs displayed data to the interface in intervals
1 Status information
2 Measured value (with unit)
3 Measured parameter
4 Continuous measurement control (CMC function)
5 Channel display:
Plug position of the sensor
6 Sensor symbol (calibration evaluation, calibration interval)
7 Measured temperature (with unit)
8 Softkeys and date + time
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Overview Multi 3420
Function display
indicators
AutoCal
e.g. TEC
Calibration with automatic buffer recognition, e.g.
with the buffer set: Technical buffers
ConCal Calibration with any buffers
Error An error occurred during calibration
AR Stability control (AutoRead) is active
HOLD Measured value is frozen (<AR> key)
Batteries are almost empty
Mains operation
Mains operation with charge function
Batteries are automatically charged in the background.
Data are automatically output to the USB-B interface at intervals
Data are output to the USB-A interface (USB flash
drive)
Power supply via the USB-B interface
Batteries are not being charged
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Multi 3420 Overview
5
1
2
3
4
1.3 Socket field
Connectors:
1
Digital sensors
(pH, ORP, conductivity, D.O.)
2 Power pack
3 USB-A (host) interface
4 USB B (device) interface
5 Service interface
CAUTION
Only connect sensors to the meter that cannot return any voltages
or currents that are not allowed (> SELV and > current circuit with
current limiting).
WTW IDS sensors and IDS adapters meet these requirements.
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Overview Multi 3420
1.4 Automatic sensor recognition
The automatic sensor recognition for IDS sensors allows
z to operate an IDS sensor at different meters without recalibration
z to operate different IDS sensors at one meter without recalibration
z to assign measurement data to an IDS sensor
– Measurement datasets are always stored and output with the
sensor name and sensor series number.
z to assign calibration data to an IDS sensor
– Calibration data and calibration history are always stored and
output with the sensor name and sensor series number.
z to activate the correct cell constant for conductivity sensors auto-
matically
z to hide menus automatically that do not concern this sensor
To be able to use the automatic sensor recognition, a meter that supports the automatic sensor recognition (e.g. Multi 3420) and a digital
IDS sensor are required.
In digital IDS sensors, sensor data are stored that clearly identify the
sensor.
The sensor data are automatically taken over by the meter.
1.5 IDS sensors
IDS sensors
z support the automatic sensor recognition
z show only the settings relevant to the specific sensor in the setting
menu
z process signals in the sensor digitally so that precise and interfer-
ence-free measurements are enabled even with long cables
z facilitate to assign a sensor to a measured parameter with differently
colored couplings
z have quick-lock couplings with which to fix the sensors to the meter.
12
Note
Information on available IDS sensors is given on the Internet and in
the WTW catalog, "Laboratory and field instrumentation".
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Multi 3420 Overview
Sensor data from IDS
sensors
IDS sensors transmit the following sensor data to the meter:
z SENSOR ID
– Sensor name
– Sensor series number
z Calibration data
– Calibration date
– Calibration characteristics
– Calibration interval
– Selected buffer set (IDS pH sensors only)
– Cell constant (IDS conductivity sensors only)
– Calibration history of the last 10 calibrations
z Measurement settings (IDS conductivity sensors only)
– The set measured parameter
– The set reference temperature
– The set temperature coefficient
– The set TDS factor
The calibration data are updated in the IDS sensor after each calibration procedure. A message is displayed while the data are being
updated in the sensor.
Note
In the measured value display, you can display the sensor name and
series number of the selected sensor with the [Info] softkey. You can
then display all further sensor data stored in the sensor with the [More]
softkey.
1.6 IDS adapter for analog sensors
With the aid of an IDS adapter, you can also operate analog sensors
on the Multi 3420. An IDS adapter and analog sensor together behave
like an IDS sensor.
The measuring electronics with the stored adapter data are in the
adapter head. The adapter data correspond to the sensor data.
Note
Information on available IDS adapters is given on the Internet and in
the WTW catalog, "Laboratory and field instrumentation".
Detailed information on the IDS adapter is given in the operating manual of the adapter.
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Overview Multi 3420
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Multi 3420 Safety
2 Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the meter.
Consequently, all responsible personnel must read this operating manual before working with the meter.
The operating manual must always be available within the
vicinity of the meter.
Target group The meter was developed for work in the field and in the laboratory.
Thus, we assume that, as a result of their professional training and
experience, the operators will know the necessary safety precautions
to take when handling chemicals.
Safety instructions Safety instructions in this operating manual are indicated by the warn-
ing symbol (triangle) in the left column. The signal word (e.g. "Caution")
indicates the level of danger:
Further notes
WARNING
indicates instructions that must be followed precisely in order to
avoid possibly great dangers to personnel.
CAUTION
indicates instructions that must be followed precisely in order to
avoid the possibility of slight injuries or damage to the meter or
the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manuals.
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Safety Multi 3420
2.1 Authorized use
The authorized use of the meter consists exclusively of the measurement of the pH, ORP, conductivity and dissolved oxygen in a field and
laboratory environment.
The technical specifications as given in chapter 7 T
ECHNICAL DATA must
be observed. Only the operation and running of the meter according to
the instructions given in this operating manual is authorized.
Any other use is considered unauthorized.
2.2 General safety instructions
This meter is constructed and tested in compliance with the IEC 1010
safety regulations for electronic measuring instruments.
It left the factory in a safe and secure technical condition.
Function and
operational safety
The smooth functioning and operational safety of the meter can only be
guaranteed if the generally applicable safety measures and the specific
safety instructions in this operating manual are followed during operation.
The smooth functioning and operational safety of the meter can only be
guaranteed under the environmental conditions that are specified in
chapter 7 T
ECHNICAL DATA.
If the meter was transported from a cold environment to a warm environment, the formation of condensate can lead to the faulty functioning
of the meter. In this event, wait until the temperature of the meter
reaches room temperature before putting the meter back into operation.
CAUTION
The meter is only allowed to be opened by authorized personnel.
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Multi 3420 Safety
Safe operation If safe operation is no longer possible, the meter must be taken out of
service and secured against inadvertent operation!
Safe operation is no longer possible if the meter:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of
time
z is visibly damaged
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the meter.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and
guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
CAUTION
In addition to the safety instructions mentioned here, also follow
the safety instructions of the sensors used.
The operating manuals of the sensors are available on the supplied CD and on the Internet under www.WTW.com.
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Safety Multi 3420
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Multi 3420 Commissioning
3 Commissioning
3.1 Scope of delivery
z Meter Multi 3420
z 4 NiMH rechargeable batteries 1.2 V Mignon type AA
z USB cable (A plug on mini B plug)
z Power pack
z Short instructions
z Detailed operating manual (4 languages)
z CD-ROM
3.2 Power supply
The Multi 3420 is supplied with power in the following ways:
z Battery operation with NiMh rechargeable batteries
z Mains operation with the supplied power pack.
The NiMh rechargeable batteries are automatically charged while
the power pack is connected.
z USB operation via a connected USB-B cable.
The inserted NiMh rechargeable batteries are not charged
3.3 Initial commissioning
Perform the following activities:
z Insert the rechargeable batteries and charge them
z Connect the power pack (mains operation / battery charging)
z Switch on the meter
z Set the date and time
3.3.1 Inserting the rechargeable batteries
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1 Unscrew the two screws (1) on the underside of the meter.
2 Open the battery compartment (2) on the underside of the
meter.
19
Commissioning Multi 3420
2
1
3 Place four rechargeable batteries (type Mignon AA) in the bat-
tery compartment.
CAUTION
Make sure that the poles of the rechargeable batteries are positioned correctly.
The
± signs on the batteries must correspond to the ± signs in the
battery compartment.
4 Close the battery compartment (2) and tighten the screws (1).
3.3.2 Connecting the power pack / charging the batteries
CAUTION
The line voltage at the operating site must lie within the input voltage range of the original power pack (see section 7.1).
CAUTION
Use original power packs only (see section 7.1).
CAUTION
The batteries in the battery compartment are automatically
charged when the power pack is connected.
Make sure that only NiMH rechargeable batteries are in the battery
compartment. The charging process is optimized for NiMH rechargeable batteries. Other battery types can cause damage during the charging process.
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Multi 3420 Commissioning
1 Connect the plug of the power pack to the socket for the power
pack on the Multi 3420.
2 Connect the original power pack to an easily accessible power
outlet.
During mains operation, one of the following symbols is displayed:
:
Mains operation with charge function
Batteries are automatically charged in the background.
:
Mains operation
Note
Charge the batteries completely prior to putting the meter into operation
for the first time. The charging process takes approx. 10 hours. The
symbol is displayed if the batteries are nearly discharged.
3.3.3 Switching on the meter
1 Press the <On/Off> key.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test
is being performed.
2 Connect the sensor.
The meter switches to the measuring mode (measured value
display).
Note
The meter has an energy saving feature to avoid unnecessary power
consumption during battery operation.
The energy saving feature switches off the meter during battery operation if no key is pressed during the adjusted interval. (How to set the
switch-off interval, see section 4.4).
The switch-off interval of the energy saving feature is not active when
the meter is supplied with power via the power pack or the USB-B
cable.
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Commissioning Multi 3420
3.3.4 Setting the date and time
3 See section 4.3.5
22
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Multi 3420 Operation
22.11.2010 08:00Info
4 Operation
4.1 Switching on the meter
Switching on Press the <On/Off> key.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test is being
performed.
If a sensor is connected, the measured value display appears.
Switching off Press the <On/Off> key.
4.2 Login with a user name
After activation of the user administration by the administrator, measurements are only possible after login with a user name. The user
name is documented with the measured values and in records.
All user names entered by the administrator are listed in the User name
menu. The administrator determines for each user whether or not a
password is required for login to the meter.
If the Password menu item is grayed out, no password is required for
login.
1 Switch on the meter with <On/Off>.
The Login dialog box appears.
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Operation Multi 3420
User name Admin
Password ####
Change password
Login
22.09.2009 08:00
2 Using <S><T>, enter the Benutzername menu item and con-
firm with <MENU/ENTER>.
The user name is highlighted.
3Using <S><T>, select a user name and confirm with <MENU/
ENTER>.
Note
The login is done immediately if no password is required.
If a sensor is connected the measured value display appears.
4 If a password is required:
Using <S><T>, enter the Password menu item and confirm
with <MENU/ENTER>.
Note
The user specifies the password when he or she first logs in with a user
name.
A valid password consists of 4 digits.
The user can change the password with the next login.
5 Change the digit of the highlighted position with <S><T>.
Go to the next digit of the password with <W><X>.
When the password was completely entered, confirm with
<MENU/ENTER>.
The login takes place. If a sensor is connected the measured
value display appears.
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Multi 3420 Operation
Changing the password If the administrator has set up the access with password protection:
1 Switch on the meter with <On/Off>.
The Login dialog box appears.
2 Using <S><T>, enter the Benutzername menu item and con-
firm with <MENU/ENTER>.
The user name is highlighted.
3 Using <S><T>, select a user name and confirm with <MENU/
ENTER>.
4 Using <S><T>, enter the Change password menu item and
confirm with <MENU/ENTER>.
5 Enter the old password in the Password box with <S><T>
and <W><X> and confirm with <MENU/ENTER>.
6 Enter the new password in the New password box with
<S><T> and <W><X> and confirm with <MENU/ENTER>.
The password is changed.
The login takes place. If a sensor is connected the measured
value display appears.
Forgotten the
password?
Contact the administrator.
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Operation Multi 3420
4.3 General operating principles
This section contains basic information on the operation of the
Multi 3420.
Operating elements,
display
Operating modes,
navigation
An overview of the operating elements and the display is given in section 1.1 and section 1.2.
An overview of the operating modes and navigation of the Multi 3420 is
given in section 4.3.1 and section 4.3.3.
4.3.1 Operating modes
The meter has the following operating modes:
z Measuring
The measurement data of the connected sensors is shown in the
measured value display
z Calibration
The course of a calibration with calibration information, functions
and settings is displayed
z Storage in memory
The meter stores measuring data automatically or manually
z Data transmission
The meter transmits measuring data and calibration records to a
USB-B interface automatically or manually.
z Setting
The system menu or a sensor menu with submenus, settings and
functions is displayed
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Multi 3420 Operation
22.11.2010 08:00Info
30.09.2009 08:00Info
4.3.2 Display of several sensors in measuring mode
The measured values of the connected sensors can be displayed in the
following ways:
z Clear display of all connected sensors
z Detailed display of one sensor
(e.g. incl. CMC feature with pH sensors)
With the softkey you can very easily switch between the two display
types. The suitable softkey is displayed, depending on the operating
situation.
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Operation Multi 3420
General
Interface
Clock function
Service information
Reset
System
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4.3.3 Navigation
Measured value display In the measured value display, you can
z use <S><T> to select one of several connected sensors. The
selected sensor is displayed with a colored background.
The following actions / menus refer to the selected sensor
z open the menu for calibration and measurement settings with
<MENU/ENTER> (short
keystroke)
z open the system menu with the sensor-independent settings by
pressing <MENU/ENTER>Storage & config for a <MENU/
ENTER
_>long keystroke, approx. 2 s).
z change the display in the selected measuring window (e. g. pH ><−
mV) by pressing <M>.
Menus and dialogs The menus for settings and dialogs in procedures contain further sub-
menus. The selection is made with the <S><T> keys. The current
selection is displayed with a frame.
z Submenus
The name of the submenu is displayed at the upper edge of the
frame. Submenus are opened by confirming with <MENU/ENTER>.
Example:
z Settings
Settings are indicated by a colon. The current setting is displayed on
the right-hand side. The setting mode is opened with <MENU/
ENTER>. Subsequently, the setting can be changed with <S><T>
and <MENU/ENTER>. Example:
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Multi 3420 Operation
Language: Deutsch
Acoustic signal: Off
Volume 9
Illumination: On
Brightness: 12
Switchoff time: 1 h
Temperature unit: °C
Stability control
: On
General
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Calibration record
Calibration data storage
Buffer: TEC
Single-point calibration: Yes
Calibration interval: 7 d
Unit for slope: mV/pH
[i] 2.00 4.01 7.00 10.01
pH
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Calibration record
Calibration data storage
Buffer: TEC
Single-point calibration: Yes
Calibration interval: 7 d
Unit for slope: mV/pH
[i] 2.00 4.01 7.00 10.01
pH
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z Functions
Functions are designated by the name of the function. They are
immediately carried out by confirming with <MENU/ENTER>. Example: Display the Calibration record function.
Messages Information is marked by the [
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i
] symbol. They cannot be selected.
Example:
Note
The principles of navigation are explained in the two following sections
by reference of examples:
z Setting the language (section 4.3.4)
z Setting the date and time (see section 4.3.5).
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System
Data storage
Storage & config
22.09.2009 08:00
4.3.4 Example 1 on navigation: Setting the language
1 Press the <On/Off> key.
The measured value display appears.
The instrument is in the measuring mode.
2 Open the Storage & config menu with <MENU/ENTER_>.
The instrument is in the setting mode.
3 Select the System submenu with <S><T>.
The current selection is displayed with a frame.
4 Open the System submenu with <MENU/ENTER>.
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