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
3
ba77076e06 05/2021
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
4ba77076e06 05/2021
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

MU 6100 L Contents
5
ba77076e06 05/2021
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
6ba77076e06 05/2021
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
ba77076e06 05/2021 7
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
8 ba77076e06 05/2021
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
ba77076e06 05/2021 9
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
10 ba77076e06 05/2021
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.

MU 6100 L Technical data
ba77076e06 05/2021 11
3.1.2 Oxi
Measuring ranges,
resolution
(depending on the
sensor)
Variable Measuring range Resolution
Concentration [mg/l] 0 ... 20.00 (0 ... 20.0)
20.0 ... 90.0
(20 ... 90)
0.01 (0.1)
0.1 (1)
Saturation [%] 0 ... 200.0 (0 ... 600)
0 ... 600
0.1 (1)
1
D.O. partial pressure
[mbar]
0 ... 200.0 (0 ... 1250)
0 ... 1250
0.1 (1)
1
T [°C] 0 ... 50,0 0.1
Accuracy (± 1 digit) Variable Accuracy
Concentration [mg/l] ± 0.5 % of measured value
at ambient temperature of +5 °C ... +30 °C
Saturation [%] ± 0.5% of measured value
when measuring in the range of ± 10 K
around the calibration temperature
D.O. partial pressure
[mbar]
± 0.5 % of measured value
at ambient temperature of +5 °C ... +30 °C
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
Correction functions Temperature
compensation
Accuracy better than 2 % at 0 ... +40 °C
Salinity correction 0 ... 70.0 SAL
Air pressure correc-
tion
Automatic through integrated
pressure sensor in the range of 500 ... 1100
mbar
The accuracy values specified here apply exclusively to the meter.
The accuracy of the D.O. sensors has also to be taken into
account.

Technical data MU 6100 L
12 ba77076e06 05/2021
3.1.3 Cond
Measuring ranges,
resolution
(depending on the sen-
sor)
Variable Measuring range Resolution
ϰ[µS/cm] 0.000 ... 1.999*
0.00 ... 19.99**
0.0 ... 199.9
200 ... 1999
0.001
0.01
0.1
1
ϰ [mS/cm] 2.00 ... 19.99
20.0 ... 199.9
200 ... 1000
0.01
0.1
1
ρ (Resistivity)
[Ohm*cm]
1.000 ... 1.999
2.00 ... 19.99
20.0 ... 199.9
200 ... 1999
0.001
0.01
0.1
1
ρ (Resistivity)
[kOhm*cm]
2.00 ... 19.99
20.0 ... 199.9
200 ... 1999
0.01
0.1
1
ρ (Resistivity)
[MOhm*cm]
2.00 ... 19.99**
20.0 ... 199.9*
0.01
0.1
SAL 0.0 ... 70.0
according to the IOT
table
0.1
TDS 0 ... 1999 mg/l
2.00 ... 19.99 g/l
20.0 ... 199.9 g/l
1
0.01
0.1
T [°C] -5.0 ... +105.0 0.1
T [°F] +23.0 ... +221.0 0.1
* only possible with cells of the cell constant, 0.010 cm-1
** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ...
0.110 cm-1
Cell constants Cell constant C Values
Can be calibrated in
the ranges
0.450 ... 0.500 cm-1
0.800 ... 0.880 cm-1
Adjustable 0.090 ... 0.110 cm-1
0.010 cm-1 (fixed)
0,250 ... 1,000 cm-1
Reference temperature Reference tempera-
ture
Values
Adjustable 20 °C (Tref20)
25 °C (Tref25)

MU 6100 L Technical data
ba77076e06 05/2021 13
3.2 General data
Accuracy (± 1 digit) Variable Accuracy Temperature of the test
sample
ϰ and ρ / temperature compensation
None (Off) ± 0.5 %
Nonlinear (nLF) ± 0.5 % 0 °C ... +35 °C
according to EN 27 888
± 0.5 % +35 °C ... +50 °C
enhanced nLF function
Linear (lin) ± 0.5 % +10 °C ... +75 °C
SAL / range
0.0 ... 42.0 ± 0.1 +5 °C ... +25 °C
± 0.2 +25 °C ... +30 °C
TDS [mg/l]
± 0.5 %
T [°C] / temperature sensor
NTC 30 ± 0.1
PT 1000 ± 0.1
The accuracy values specified here apply exclusively to the meter.
The accuracy of the measuring cell has also to be taken into
account.
Further data are given in the documentation of your sensor.
Dimensions ca. 240 x 190 x 80 mm
Weight Approx. 1.0 kg
Mechanical structure Type of protection IP 43
Electrical safety Protective class III
Test certificates CE
Ambient
conditions
Storage -25 °C ... +65 °C
Operation -10 °C ... +55 °C
Admissible relative
humidity
Yearly mean: < 75 %
30 days/year: 95 %
Other days: 85 %

Technical data MU 6100 L
14 ba77076e06 05/2021
Power
supply
Batteries 4 x 1.5 V alkali-manganese batteries, type
AA
Rechargeable batter-
ies
4 x 1.2 V NiMH rechargeable batteries,
type AA
(no charging function)
Operational life Up to 1000 h without / 150 h with illumination
Power pack
(charging device)
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 0.5 A
Output: 9 V = / 1,1 A
Connection max. overvoltage category II
Primary plugs contained in the scope of
delivery: Euro, US, UK and Australian.
pH sensor input Input resistance > 5 * 1012 ohm
Input current < 1 * 10-12 A
USB interface Type USB 1.1
USB B (device), data output
Baud rate Adjustable:
1200, 2400, 4800, 9600, 19200 Baud
Data bits 8
Stop bits 2
Parity None
Handshake RTS/CTS
Cable length Max. 3 m
Guidelines
and norms used
EMC EU directive 2014/30/EU
EN 61326-1
FCC Class A
Meter safety EU directive 2014/35/EU
EN 61010-1
IP protection class EN 60529
RoHS EU directive 2011/65/EU

MU 6100 L Commissioning
ba77076e06 05/2021 15
4 Commissioning
4.1 Scope of delivery
MeterMU 6100 L
4 batteries 1.5 V Mignon type AA
Power pack
Stand
Stand holder
Short instructions
CD-ROM with
– USB drivers
– detailed operating manual
– Software MultiLab Importer
4.2 Power supply
The MU 6100 L is supplied with power in the following ways:
Mains operation with the supplied power pack
Battery operation (4 x alkaline manganese batteries, type AA)
USB operation via a connected USB-B cable
4.3 Initial commissioning
Perform the following activities:
Insert the supplied batteries
For mains operation: Connect the power pack
If necessary, mount the stand
Switch on the meter
(see section 5.2 SWITCHING ON THE METER, page 20)
Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 25)

Commissioning MU 6100 L
16 ba77076e06 05/2021
4.3.1 Inserting the batteries
4.3.2 Connect the power pack
1 Battery compartment
1. Open the battery compartment (1) on the underside of the meter.
CAUTION
Make sure that the poles of the batteries are positioned cor-
rectly.
The ± signs on the batteries must correspond to the ± signs in
the battery compartment.
You can operate the meter either with normal batteries or with
rechargeable batteries (Ni-MH). In order to charge the batteries, an
external charging device is required.
2. Place four batteries (type Mignon AA) in the battery compartment.
3. Close the battery compartment.
4. Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 25).
CAUTION
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see section 3 TECH-
NICAL DATA, page 10).
1

MU 6100 L Commissioning
ba77076e06 05/2021 17
4.3.3 Stand
The stand base can be mounted at the right side of the meter.
An arrangement of the meter with the stand may look as follows:
CAUTION
Use original power packs only.
1. Connect the plug of the power pack to the socket for the power pack on
the MU 6100 L.
2. Connect the original power pack to an easily accessible power outlet.
1. Screw the stand base to the underside of the meter.
2. Insert the stand rod in the stand base.

Operation MU 6100 L
18 ba77076e06 05/2021
5Operation
5.1 General operating principles
5.1.1 Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) 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. <OK_>).
<F1>:
<F1__>:
<F2>:
<F2__>:
Softkeys providing situation dependent functions, e.g.:
<F2>/[USB output]:
Outputs data to the USB interface
<F2__>/[USB output]:
Configures the automatic data output to the USB inter-
face
<On/Off>: Switches the meter on or off
<MODE>: Selects the measured parameter / Quits the settings
<CAL>:
<CAL__>:
Calls up the calibration procedure
Displays the calibration data
<STR>:
<STR_>:
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
Increments, decrements values
Increments, decrements values continuously
<OK>:
<OK_>:
Opens the menu for measurement settings / confirms
entries
Opens the menu for system settings
<HOLD> Freezes the measured value (HOLD function)

MU 6100 L Operation
ba77076e06 05/2021 19
5.1.2 Display
5.1.3 Status information (meter)
1 Status information (sensor)
2 Measured value (with unit)
3 Measured parameter
4 Channel display: Plug position of the sensor
5 Sensor symbol (calibration evaluation, calibration interval)
6 Measured temperature (with unit)
7 Status information (meter)
8 Softkeys and date + time
AR Stability control (AutoRead) is active (calibration)
HOLD Measured value is frozen (<HOLD> key)
Batteries are almost empty
Data are automatically output to the USB-B interface at
intervals
HOLD AR
25.0
6.093
pH
°C
4
3
2
5
6
7
8
1
AutoCal TEC
15.03.2014
08:00
Menu

Operation MU 6100 L
20 ba77076e06 05/2021
5.1.4 Connectors
5.2 Switching on the meter
1 pH electrode
2 Reference electrode / temperature sensor
3 Reference electrode / temperature sensor
4 D.O. sensor or conductivity measuring cell
5 Mini USB-B interface
6 Power pack
7 Service interface
CAUTION
Only connect sensors to the meter that cannot return any volt-
ages or currents that are not allowed (> SELV and > current
circuit with current limiting).
Almost all customary sensors fulfill these conditions.
1. Switch the meter on with <On/Off>.
The meter performs a self-test.
The display shows the manufacturer's logo while the self-test is being
performed.
The measured value display appears.
123567 4
pH
6.949
25.0 °C
15.02.2014
14:15
Menu