wtw Multi 3420 User manual

OPERATING MANUAL
ba75864e18 01/2015
Multi 3420
DIGITAL METER FOR DIGITAL IDS SENSORS

2ba75864e18 01/2015
Multi 3420
Copyright © 2015, WTW GmbH
Reproduction in whole - or even in part - is prohibited without the
express written permission of WTW GmbH, Weilheim.
Printed in Germany.
The latest version of the present operating manual is avail-
able on the Internet under www.wtw.com.

Multi 3420 Contents
3
Multi 3420 - Contents
ba75864e18 01/2015
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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. . . . . . . . . . 20
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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 . . . . . . . . . . . . . . . . . . . . . 33
4.4.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.4.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4.4.3 Automatic Stability control . . . . . . . . . . . . . . . . . 35
4.4.4 Automatic switch-off . . . . . . . . . . . . . . . . . . . . . . 36
4.4.5 Display illumination . . . . . . . . . . . . . . . . . . . . . . 36

Contents Multi 3420
4ba75864e18 01/2015
4.5 Sensor info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.6 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.7 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.7.1 General information . . . . . . . . . . . . . . . . . . . . . . 38
4.7.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . 39
4.7.3 Settings for pH measurements . . . . . . . . . . . . . . 40
4.7.4 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.7.5 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 47
4.7.6 Carrying out an automatic calibration (AutoCal) . 47
4.7.7 Carrying out a manual calibration (ConCal) . . . . 51
4.7.8 Displaying calibration records. . . . . . . . . . . . . . . 55
4.7.9 Continuous measurement control (CMC
function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4.7.10 QSC function (sensor quality control) . . . . . . 57
4.8 ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4.8.1 General information . . . . . . . . . . . . . . . . . . . . . . 60
4.8.2 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 60
4.8.3 Settings for ORP measurements . . . . . . . . . . . . 62
4.9 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.9.1 General information . . . . . . . . . . . . . . . . . . . . . . 63
4.9.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.9.3 Settings for D.O. sensors
(menu or measurement and calibration settings) 66
4.9.4 FDO®Check procedure (check of the
FDO®925) . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.9.5 D.O. calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.9.6 Displaying calibration records. . . . . . . . . . . . . . . 74
4.10 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.10.1 General information . . . . . . . . . . . . . . . . . . . . . . 75
4.10.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.10.3 Temperature compensation . . . . . . . . . . . . . . . . 78
4.10.4 Settings for IDS conductivity sensors . . . . . . . . . 79
4.10.5 Determining the cell constant
(calibration in control standard) . . . . . . . . . . . . . 82
4.10.6 Displaying calibration records. . . . . . . . . . . . . . . 84
4.11 Turbidity measurement (VisoTurb®900-P) . . . . . . . . . . . 85
4.11.1 General information . . . . . . . . . . . . . . . . . . . . . . 85
4.11.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
4.11.3 Settings for turbidity sensors . . . . . . . . . . . . . . . 87
4.11.4 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.11.5 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.12 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
4.12.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4.12.2 Automatic storage at intervals . . . . . . . . . . . . 95
4.12.3 Editing the measurement data storage. . . . . . . . 98
4.12.4 Erasing the measurement data storage . . . . . . . 99

Contents Multi 3420
5ba75864e18 01/2015
4.13 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
4.13.1 USB interfaces . . . . . . . . . . . . . . . . . . . . . . . . . 100
4.13.2 Connecting the PC (USB-B interface (USB
Device)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
4.13.3 Connecting a USB memory device/USB printer
(USB-A interface (USB Host)) . . . . . . . . . . . . . 101
4.13.4 Options for data transmission to the USB-B (PC)
interface and the USB-A (USB printer) interface . .
101
4.13.5 Data transmission to the USB-A interface (USB
memory device) . . . . . . . . . . . . . . . . . . . . . . . . 102
4.13.6 MultiLab Importer . . . . . . . . . . . . . . . . . . . . . . . 103
4.14 MultiLab User. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
4.15 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
4.15.1 Resetting the measurement settings . . . . . . . . 103
4.15.2 Resetting the system settings. . . . . . . . . . . . . . 106
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . 107
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
5.1.1 Replacing the rechargeable batteries . . . . . . . . 107
5.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
5.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
5.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.2 pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
6.3 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
6.4 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
6.5 Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
7.2 Measuring ranges, resolution, accuracy . . . . . . . . . . . . 118
8 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
9 Appendix: Firmware update. . . . . . . . . . . . . . . . . . . . 123
9.1 Firmware update for the meter Multi 3420. . . . . . . . . . . 123
9.2 Firmware-Update for IDS Sensors. . . . . . . . . . . . . . . . . 124

Multi 3420
6
ba75864y18 01/2015

Overview Multi 3420
7ba75864y18 01/2015
1 Overview
The compact, digital precision meter Multi 3420 enables you to carry
out pH measurements, ORP measurements, conductivity measure-
ments, dissolved oxygen (D.O.) measurements and turbidity measure-
ments 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:
proven calibration procedures
automatic stability control (AR),
automatic sensor recognition,
CMC (continuous measurement control)
QSC (sensor quality control).
The two USB interfaces (USB-A and USB-B) enable you to:
Transmit data to
– a USB memory device
–aPC
Update the meter firmware.
1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
1 Keypad
2 Display
3 Socket field
1
2
3

Multi 3420 Overview
8
ba75864y18 01/2015
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
(e.g. <MENU/ENTER_>).
<F1>:
<F2>:
Softkeys providing situation dependent functions, e.g.:
<F1>/[Info]: View information on a sensor
<On/Off>:
<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
<STO>:
<STO_>:
Saves a measured value manually
Opens the menu for the automatic save function
<RCL>:
<RCL_>:
Displays the manually stored measured values
Displays the automatically stored measured values
<><>:
<><>:
Menu control, navigation
<MENU/ENTER>:
<MENU/ENTER_>:
Opens the menu for measurement settings / Confirms
entries
Opens the menu for system settings
<PRT>
<PRT_>
Outputs stored data to the interface
Outputs displayed data to the interface in intervals
<ESC>: Cancels an action
F1
F2
CAL
ARAR
MENU
ENTER
MENU
ENTER
PRT
ESC

Overview Multi 3420
9ba75864y18 01/2015
1.2 Display
1Status information
2Measured value (with unit)
3Measured parameter
4Continuous measurement control (CMC function)
5Channel display:
Plug position of the sensor
6Sensor symbol (calibration evaluation, calibration interval)
7Measured temperature (with unit)
8Softkeys and date + time
4
3
2
6
7
8
1
5
22.09.2009 08:00
Info

Multi 3420 Overview
10
ba75864y18 01/2015
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 back-
ground.
Data are automatically output to the USB-B inter-
face at intervals
Data are output to the USB-A interface (USB flash
drive)
Data are output to the USB-A interface (USB
printer)
If there is a USB-B connection (such as to a PC) at
the same time, the data are output only to the
USB-B interface.
Power supply via the USB-B interface
Batteries are not being charged