VWR International MU 6100 H User manual

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MULTI meter
MU 6100 H
INSTRUCTION MANUAL
European Catalogue Number(s):
MU 6100 H S1: 665-0311
MU 6100 H S2: 665-0312
6100 H
MU
Version: 2
Issued: September 11, 2014 11:39 am

MU 6100 H
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Legal address of manufacturer:
VWR International bvba
Researchpark Haasrode 2020
Geldenaaksebaan 464
B-3001 Leuven
[phone]
http://be.vwr.com
Manufactured in Germany.

MU 6100 H Contents
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MU 6100 H - 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 H 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
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . 17
5.1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.3 Status information (meter) . . . . . . . . . . . . . . . . . 18
5.1.4 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2 Measured value display . . . . . . . . . . . . . . . . . . . 21
5.4.3 Menus and dialogs . . . . . . . . . . . . . . . . . . . . . . . 21

Contents MU 6100 H
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5.4.4 Elements in menus and dialogs . . . . . . . . . . . . . 21
5.4.5 Navigation example 1:Setting the language . . . . 22
5.4.6 Example 2 on navigation: Setting the date
and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.5 Channel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.5.1 Display of several sensors in the measuring
mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6 pH value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . 27
6.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 28
6.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.2.2 When do you have to calibrate? . . . . . . . . . . . . . 29
6.2.3 Automatic calibration (AutoCal) . . . . . . . . . . . . . 29
6.2.4 Manual calibration (AnyCal) . . . . . . . . . . . . . . . . 32
6.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 36
7 ORP voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . 38
7.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 39
7.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.1.1 Measuring D.O.. . . . . . . . . . . . . . . . . . . . . . . . . . 40
8.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 41
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 42
8.2.3 Calibration procedure . . . . . . . . . . . . . . . . . . . . . 42
8.2.4 Calibration in water vapor-saturated air
(air calibration vessel). . . . . . . . . . . . . . . . . . . . . 42
8.2.5 Calibrating with a comparison measurement
(OxiComp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . 45
9 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.1.1 Measuring the conductivity . . . . . . . . . . . . . . . . . 47
9.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . 48
9.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . 49

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9.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . 49
9.2.3 Determining the cell constant (calibration in
control standard) . . . . . . . . . . . . . . . . . . . . . . 49
9.2.4 Calibration data . . . . . . . . . . . . . . . . . . . . . . . . . 50
10 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 Measurement settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1.1 Settings for pH measurements. . . . . . . . . . . . . . 52
10.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . 53
10.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 54
10.1.4 Settings for ORP measurements . . . . . . . . . . . . 55
10.1.5 Settings for D.O. sensors . . . . . . . . . . . . . . . . . . 56
10.1.6 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 57
10.1.7 Settings for conductivity measuring cells . . . . . . 58
10.1.8 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . 60
10.1.9 Temperature compensation . . . . . . . . . . . . . . . . 60
10.1.10 Setting the TDS factor . . . . . . . . . . . . . . . . . . . . 61
10.2 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . 62
10.2.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
10.2.2 Data storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.2.3 Automatic Stability control . . . . . . . . . . . . . . . . . 63
10.3 Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10.3.1 Resetting the measurement settings. . . . . . . . . 63
10.3.2 Resetting the system settings . . . . . . . . . . . . . . 65
11 Data memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.1 Manual storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.2 Automatic data storage at intervals . . . . . . . . . . . . . . 67
11.3 Measurement data memory . . . . . . . . . . . . . . . . . . . . . . 69
11.3.1 Editing the measurement data memory . . . . . . . 69
11.3.2 Erasing the measurement data memory . . . . . . 71
11.3.3 Measurement dataset . . . . . . . . . . . . . . . . . . . . 71
11.3.4 Memory locations . . . . . . . . . . . . . . . . . . . . . . . . 71
12 Transmitting data (USB interface). . . . . . . . . . . . . . . . 72
12.1 Options for data transmission . . . . . . . . . . . . . . . . . . . . . 72
12.2 Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12.3 MultiLab Importer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
13 Maintenance, cleaning, disposal, accessories . . . . . 74
13.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
13.1.1 General maintenance activities . . . . . . . . . . . . . 74
13.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . 74
13.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
13.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
13.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Contents MU 6100 H
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13.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13.5.1 General information . . . . . . . . . . . . . . . . . . . . . . 76
13.5.2 pH / ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
13.5.3 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
13.5.4 D.O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
14 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
14.1 pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
14.2 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
14.3 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
14.4 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
15 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
16 Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
17 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
18 Technical service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
19 Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
20 Compliance with local laws and regulations . . . . . . . 94

MU 6100 H 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 H
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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 field and laboratory environment.

MU 6100 H Overview
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2 Overview
2.1 MU 6100 H meter
The MU 6100 H meter enables you to perform measurements (pH, U, conduc-
tivity, dissolved oxygen) ) quickly and reliably.
The MU 6100 H 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 H meter and a
suitable sensor.
1 Keypad
2 Display
3 Connectors
1
2
3
6100 H
MU
Suitable sensors are pH electrodes, ORP electrodes, D.O. sensors and
conductivity measuring cells.

Technical data MU 6100 H
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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.

MU 6100 H Technical data
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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 H
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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 H Technical data
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3.2 General data
Accuracy (± 1 digit) Variable Accuracy Temperature of the test
sample
ϰand 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. 180 x 80 x 55 mm
Weight Approx. 0.4 kg
Mechanical structure Type of protection IP 67
Electrical safety Protective class III
Test certificates CE
Ambient
conditions
Storage -25 °C ... +65 °C
Operation +5 °C ... +55 °C
Admissible relative
humidity
Yearly mean: < 75 %
30 days/year: 95 %
Other days: 85 %

Technical data MU 6100 H
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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
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 EC directive 2004/108/EC
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
Meter safety EC directive 2006/95/EC
EN 61010-1
UL 61010-1
CAN/CSA-C22.2#61010-1
IP protection class EN 60529

MU 6100 H Commissioning
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4 Commissioning
4.1 Scope of delivery
MeterMU 6100 H
4 batteries 1.5 V Mignon type AA
Short instructions
CD-ROM with
– USB drivers
– detailed operating manual
– Software MultiLab Importer
4.2 Power supply
The MU 6100 H is supplied with power in the following ways:
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
Switch on the meter
(see section 5.2 SWITCHING ON THE METER, page 19)
Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 24)

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4.3.1 Inserting the batteries
1Screws
2 Battery compartment
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.
1. Place four batteries (type Mignon AA) in the battery compartment.
2. Close the battery compartment.
3. Set the date and time
(see section 5.4.6 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 24).
1
2

MU 6100 H Operation
ba77077e02 09/2014 17
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)

Operation MU 6100 H
18 ba77077e02 09/2014
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

MU 6100 H Operation
ba77077e02 09/2014 19
5.1.4 Connectors
5.2 Switching on the meter
1 pH electrode
2 Temperature sensor
3 D.O. sensor or conductivity measuring cell
4 Mini USB-B interface
5 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.
1234
5
pH
6.949
25.0 °C
15.02.2014
14:15
Menu

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5.3 Switching off
Automatic shut-off
function
The instrument has an automatic shut-off function in order to save the batteries
(see section 10.2.1 SYSTEM, page 62). The automatic shut-off function switches
off the meter if no key is pressed for an adjustable period.
The automatic shut-off function is not active
if the communication cable is connected
if the Automatic data storage function is active, or with automatic data trans-
mission
Display illumination The meter automatically switches off the display illumination if no key is
pressed for 30 seconds. The illumination is switched on with the next keystroke
again.
You can also generally switch the display illumination on or off (see section
10.2.1 SYSTEM, page 62).
5.4 Navigation
The principles of navigation in menus and dialogs are explained in the following
sections.
5.4.1 Operating modes
The instrument has the following operating modes:
Only those displays and functions are available in the active operating mode
that are currently being required.
1. Switch the printer off with <On/Off>.
Operating
mode
Explanation
Measuring The measurement data of the connected sensor are shown
in the measured value display
Calibration The course of a calibration with calibration information, func-
tions and settings is displayed
Storing in
memory
The meter stores measuring data automatically or manually
Transmit-
ting data
The meter transmits measuring data and calibration records
to a USB-B interface automatically or manually.
Setting The system menu or a sensor menu with submenus, set-
tings and functions is displayed