VWR 665-0309 User manual

ba77076e06 05/2021
VWR®MU 6100 L - Multi Meter
Operating manual
EU cat. no NA cat. no
MU 6100 L S1 665-0309 76460-494
MU 6100 L S2 665-0310 76460-496
6100 L
MU

MU 6100 L
2ba77076e06 05/2021
Legal Address of Manufacturer:
Country of origin: Germany.
Europe
VWR International BV
Researchpark Haasrode 2020
Geldenaaksebaan 464
B-3001 Leuven
[phone]
http://be.vwr.com
United States
VWR International LLC
100 Matsonford Rd
Radnor, PA 19087
[phone]
www.vwr.com
Importer to UK:
VWR International Ltd
Hunter Boulevard, Magna Park
Lutterworth, Leicestershire, LE17 4XN
http://uk.vwr.com

MU 6100 L Contents
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MU 6100 L - Contents
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1.1 Safety information in the operating manual . . . . . 7
1.1.2 Safety signs on the meter . . . . . . . . . . . . . . . . . . 7
1.1.3 Further documents providing safety information . 7
1.2 Safe operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.2.2 Requirements for safe operation . . . . . . . . . . . . . 8
1.2.3 Unauthorized use . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 MU 6100 L meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 10
3.1.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.2 Oxi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.3 Cond. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1 Inserting the batteries. . . . . . . . . . . . . . . . . . . . . 16
4.3.2 Connect the power pack . . . . . . . . . . . . . . . . . . 16
4.3.3 Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . 18
5.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.3 Status information (meter) . . . . . . . . . . . . . . . . . 19
5.1.4 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 21

Contents MU 6100 L
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5.4.2 Measured value display . . . . . . . . . . . . . . . . . . . 22
5.4.3 Menus and dialogs . . . . . . . . . . . . . . . . . . . . . . . 22
5.4.4 Elements in menus and dialogs . . . . . . . . . . . . . 22
5.4.5 Navigation example 1:Setting the language . . . . 23
5.4.6 Example 2 on navigation: Setting the date
and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.1 Display of several sensors in the measuring
mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6 pH value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 28
6.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 29
6.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.2.2 When do you have to calibrate? . . . . . . . . . . . . . 30
6.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . 30
6.2.4 Manual calibration (AnyCal) . . . . . . . . . . . . . . . . 33
6.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . 36
6.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 37
7 ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 39
7.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 40
7.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8 Ion concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1.1 Measuring the ion concentration . . . . . . . . . . . . 41
8.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 42
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.3 Calibration (ISE Cal) . . . . . . . . . . . . . . . . . . . . . . 43
8.2.4 Calibration standards . . . . . . . . . . . . . . . . . . . . . 46
8.2.5 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 46
9 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1.1 Measuring D.O.. . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 50
9.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 51

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9.2.3 Calibration procedure. . . . . . . . . . . . . . . . . . . . . 51
9.2.4 Calibration in water vapor-saturated air
(air calibration vessel) . . . . . . . . . . . . . . . . . . . . 51
9.2.5 Calibrating with a comparison measurement
(OxiComp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.2.6 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . 54
10 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
10.1.1 Measuring the conductivity. . . . . . . . . . . . . . . . . 56
10.1.2 Measuring the temperature . . . . . . . . . . . . . . . . 57
10.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.3 Determining the cell constant (calibration in
control standard) . . . . . . . . . . . . . . . . . . . . . . 58
10.2.4 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . 59
11 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.1 Measurement settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.1.1 Settings for pH measurements. . . . . . . . . . . . . . 61
11.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . 62
11.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 64
11.1.4 Settings for ORP measurements . . . . . . . . . . . . 64
11.1.5 Settings for D.O. sensors . . . . . . . . . . . . . . . . . . 65
11.1.6 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 66
11.1.7 Settings for conductivity measuring cells . . . . . . 67
11.1.8 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 69
11.1.9 Temperature compensation . . . . . . . . . . . . . . . . 69
11.1.10 Setting the TDS factor . . . . . . . . . . . . . . . . . . . . 70
11.2 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 71
11.2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
11.2.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
11.2.3 Automatic Stability control . . . . . . . . . . . . . . . . . 72
11.3 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
11.3.1 Resetting the measurement settings. . . . . . . . . 72
11.3.2 Resetting the system settings . . . . . . . . . . . . . . 74
12 Data memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.2 Automatic data storage at intervals . . . . . . . . . . . . . . 76
12.3 Measurement data memory . . . . . . . . . . . . . . . . . . . . . . 78
12.3.1 Editing the measurement data memory . . . . . . . 78
12.3.2 Erasing the measurement data memory . . . . . . 80
12.3.3 Measurement dataset . . . . . . . . . . . . . . . . . . . . 80
12.3.4 Memory locations . . . . . . . . . . . . . . . . . . . . . . . . 80

Contents MU 6100 L
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13 Transmitting data (USB interface) . . . . . . . . . . . . . . . . 81
13.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . 81
13.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
13.3 MultiLab Importer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
14 Maintenance, cleaning, disposal, accessories. . . . . . 83
14.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
14.1.1 General maintenance activities. . . . . . . . . . . . . . 83
14.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . . 83
14.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
14.5.1 General information . . . . . . . . . . . . . . . . . . . . . . 85
14.5.2 pH / ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
14.5.3 ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
14.5.4 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
14.5.5 D.O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
15 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
15.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
15.2 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
15.3 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15.4 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
16 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
17 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
18 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
19 Technical service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
20 Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
21 Compliance with local laws and regulations . . . . . . 108

MU 6100 L Safety
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1 Safety
1.1 Safety information
1.1.1 Safety information in the operating manual
This operating manual provides important information on the safe operation of
the meter. Read this operating manual thoroughly and make yourself familiar
with the meter before putting it into operation or working with it. The operating
manual must be kept in the vicinity of the meter so you can always find the infor-
mation you need.
Important safety instructions are highlighted in this operating manual. They are
indicated by the warning symbol (triangle) in the left column. The signal word
(e.g. "CAUTION") indicates the level of danger:
NOTE
indicates a possibly dangerous situation where goods might be damaged
if the actions mentioned are not taken.
1.1.2 Safety signs on the meter
Note all labels, information signs and safety symbols on the meter and in the
battery compartment. A warning symbol (triangle) without text refers to safety
information in this operating manual.
1.1.3 Further documents providing safety information
The following documents provide additional information, which you should
observe for your safety when working with the measuring system:
• Operating manuals of sensors and other accessories
• Safety datasheets of calibration or maintenance accessories (such as buffer
solutions, electrolyte solutions, etc.)
WARNING
indicates a possibly dangerous situation that can lead to seri-
ous (irreversible) injury or death if the safety instruction is not
followed.
CAUTION
indicates a possibly dangerous situation that can lead to
slight (reversible) injury if the safety instruction is not fol-
lowed.

Safety MU 6100 L
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1.2 Safe operation
1.2.1 Authorized use
Only the operation and running of the meter according to the instructions and
technical specifications given in this operating manual is authorized (see
section 3 TECHNICAL DATA, page 10).
Any other use is considered unauthorized.
1.2.2 Requirements for safe operation
Note the following points for safe operation:
• The meter may only be operated according to the authorized use specified
above.
• The meter may only be supplied with power by the energy sources
mentioned in this operating manual.
• The meter may only be operated under the environmental conditions
mentioned in this operating manual.
• The meter may only be opened if this is explicitly described in this operating
manual (example: Inserting the batteries).
1.2.3 Unauthorized use
The meter must not be put into operation if:
• it is visibly damaged (e.g. after being transported)
• it was stored under adverse conditions for a lengthy period of time (storing
conditions, see section 3 TECHNICAL DATA, page 10).
This meter is authorized exclusively for pH, ISE, ORP, dissolved oxygen and
conductivity measurements in a laboratory environment.

MU 6100 L Overview
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2 Overview
2.1 MU 6100 L meter
The MU 6100 L meter enables you to perform measurements (pH, U, conduc-
tivity, dissolved oxygen) ) quickly and reliably.
The MU 6100 L provides the maximum degree of operating comfort, reliability
and measuring certainty for all applications.
2.2 Sensors
A measuring system ready to measure consists of the MU 6100 L meter and a
suitable sensor.
Suitable sensors are pH electrodes, ORP electrodes, D.O. sensors and
conductivity measuring cells.

Technical data MU 6100 L
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3 Technical data
3.1 Measuring ranges, resolution, accuracy
3.1.1 pH/ORP
Measuring ranges,
resolution
Variable Measuring range Resolution
pH -2.0 ... +20.0 0.1
-2.00 ... +20.00 0.01
- 2.000 ... + 19.999 0.001
U [mV] -2500 ... +2500 1
-1200.0 ... +1200. 0.1
T [°C] -5.0 ... +105.0 0.1
T [°F] 23.0 ... +221.0 0.1
Manual
temperature input
Variable Range Increment
Tmanual [°C] -25 ... +130 1
Tmanual [°F] -13 ... +266 1
Accuracy (± 1 digit) Variable Accuracy Temperature of the test
sample
pH / range *
-2.0 ... +20.0 ± 0.1 +15 °C ... +35 °C
-2.00 ... +20.00 ± 0.01 +15 °C ... +35 °C
- 2.000 ... + 19.999 ± 0.005 +15 °C ... +35 °C
U [mV] / range
-2500 ... +2500 ± 1 +15 °C ... +35 °C
-1200.0 ... +1200. ± 0.3 +15 °C ... +35 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
* when measuring in a range of ± 2 pH around a calibration point
The accuracy values specified here apply exclusively to the meter.
The accuracy of the electrodes and buffer solutions has to be taken
into account additionally.