VWR MD 8000 L User manual

ba77218e01 11/2018
VWR®MD 8000 L
Multi Parameter Meter
OPERATING MANUAL
European Catalogue Number(s):
PH SET: 665-0498
PH BIO SET: 665-0499
8000 L
MD
Version: 1
Issued: November 28, 2018 8:14 am

MD 8000 L
2ba77218e01 11/2018
Legal Address of Manufacturer:
VWR International bvba
Researchpark Haasrode 2020
Geldenaaksebaan 464
B-3001 Leuven
[phone]
http://be.vwr.com
Country of origin: Germany.

Contents
MD 8000 L Contents
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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 MD 8000 L meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.1 IDP sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2.2 Automatic sensor recognition. . . . . . . . . . . . . . . . . . . . 10
3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Measuring ranges, resolution, accuracy . . . . . . . . . . . . . . . . . . 11
3.2 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Initial commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.1 Inserting the batteries . . . . . . . . . . . . . . . . . . . . . 14
4.3.2 Connecting the power pack . . . . . . . . . . . . . . . . . . . . . 14
4.3.3 Mounting the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.1 Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1.3 Status information (meter) . . . . . . . . . . . . . . . . . . . . . . 17
5.1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.5 Sensor info. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.3 Switching off the meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.2 Measured value display . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.3 Menus and dialogs. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.4 Navigation example 1:Setting the language . . . . . . . . 22

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5.4.5 Example 2 on navigation: Setting the date and time . 24
6 pH value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.1 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . . . . . 27
6.2 pH calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.2.2 When do you have to calibrate? . . . . . . . . . . . . . . . . . 28
6.2.3 Carrying out automatic calibration (AutoCal) . . 28
6.2.4 Carrying out a manual calibration (AnyCal) . . . . . . . . 31
6.2.5 Calibration points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2.6 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7 ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.1 Measuring the ORP . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . . . . . 39
7.2 ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
8 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1.1 Measuring D.O.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . . . . . 43
8.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.2.3 Calibration procedures . . . . . . . . . . . . . . . . . . . . . . . . 44
8.2.4 Calibration in water vapor-saturated air . . . . . . . . . . . 44
8.2.5 Calibrating with Comparison meas. (e.g. Winkler
titration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.2.6 Zero point calibration . . . . . . . . . . . . . . . . . . . . . . . . . 46
8.2.7 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1.1 Measuring the conductivity . . . . . . . . . . . . . . . . . . . . . 49
9.1.2 Measuring the temperature. . . . . . . . . . . . . . . . . . . . . 51
9.2 Temperature compensation. . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.3.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.3.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.3.3 Determining the cell constant (calibration in control
standard). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.3.4 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
10 Turbidity measurement (VisoTurb®900-P) . . . . . . . . . . . . . 55
10.1 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
10.1.1 Measuring the turbidity . . . . . . . . . . . . . . . . . . . . . . . . 55
10.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.2.1 Why calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.2.2 When to calibrate? . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

MD 8000 L
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10.2.3 Calibration standards . . . . . . . . . . . . . . . . . . . . . . . . . 57
10.2.4 Carry out calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 58
10.2.5 Calibration data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
11.1 pH measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
11.1.1 Settings for pH measurements . . . . . . . . . . . . . . . . . . 62
11.1.2 Buffer sets for calibration . . . . . . . . . . . . . . . . . . . . . . 63
11.1.3 Calibration interval . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
11.2 ORP measurement settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 64
11.2.1 Settings for ORP measurements . . . . . . . . . . . . . . . . 64
11.3 D.O. measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
11.3.1 Settings for D.O. sensors
(menu for measurement and calibration settings) . . . 64
11.3.2 Enter cap coefficients . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.3.3 Saturation, local . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.4 Cond measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . 66
11.4.1 Settings for IDP conductivity sensors. . . . . . . . . . . . . 66
11.5 Turb measurement settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11.5.1 Settings for turbidity sensors . . . . . . . . . . . . . . . . . . . 68
11.6 Sensor-independent settings . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.6.1 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.6.2 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
11.6.3 Automatic Stability control . . . . . . . . . . . . . . . . . . . . . 70
11.6.4 Automatic switch-off function . . . . . . . . . . . . . . . . . . . 71
11.6.5 Display illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
11.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
11.7.1 Resetting the measurement settings . . . . . . . . . . . . . 71
11.7.2 Resetting the system settings. . . . . . . . . . . . . . . . . . . 73
12 Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
12.1 Manual data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
12.2 Automatic data storage at intervals . . . . . . . . . . . . . . . . . . 75
12.3 Measurement data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
12.3.1 Editing the measured value data storage . . . . . . . . . . 77
12.3.2 Erasing the measurement data storage . . . . . . . . . . . 78
12.3.3 Measurement dataset . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.3.4 Storage locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
13 Transmitting data (USB interface). . . . . . . . . . . . . . . . . . . . . 80
13.1 Outputting current measurement data . . . . . . . . . . . . . . . . . . . 80
13.2 Transmitting data (to a PC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
13.3 Connecting the PC / USB-B interface (USB Device) . . . . . 80
13.4 Options for data transmission to a PC . . . . . . . . . . . . . . . . . . . 81
13.5 MultiLab Importer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
14 Maintenance, cleaning, disposal. . . . . . . . . . . . . . . . . . . . . . 82
14.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
14.1.1 General maintenance activities. . . . . . . . . . . . . . . . . . 82
14.1.2 Replacing the batteries . . . . . . . . . . . . . . . . . . . . . . . . 82
14.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

MD 8000 L
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14.3 Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
14.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
15 What to do if.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
15.1 pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
15.2 Dissolved oxygen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
15.3 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
15.4 General topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
16 Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
16.1 Firmware update for the meter MD 8000 L . . . . . . . . . . . . . . . 88
16.2 Firmware update for IDP sensors. . . . . . . . . . . . . . . . . . . . . . 89
17 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
18 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
19 Technical service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
20 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

MD 8000 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 MD 8000 L
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1.2 Safe operation
1.2.1 Authorized use
The authorized use of the meter consists exclusively of the measurement of the
pH, ORP, conductivity and dissolved oxygen in a laboratory environment.
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 11).
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 11).

MD 8000 L Overview
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2 Overview
2.1 MD 8000 L meter
The MD 8000 L meter enables you to perform measurements (pH, U, conduc-
tivity, dissolved oxygen) ) quickly and reliably.
The MD 8000 L provides the maximum degree of operating comfort, reliability
and measuring certainty for all applications.
The MD 8000 L supports you in your work with the following functions:
Automatic sensor recognition
Data transmission via the USB interface (USB-B).
2.2 Sensors
A measuring system ready to measure consists of the MD 8000 L meter and a
suitable sensor.
Suitable sensors are IDP pH sensors, IDP ORP sensors, IDP conductivity
sensors and IDP D.O. sensors.
2.2.1 IDP sensors
IDP sensors
support the automatic sensor recognition
show only the settings relevant to the specific sensor in the setting menu
process signals in the sensor digitally so that precise and interference-free
measurements are enabled even with long cables
1 Keypad
2 Display
3 Connectors
8000 L
MD
1
2
3

Overview MD 8000 L
10 ba77218e01 11/2018
facilitate to assign a sensor to a measured parameter with differently colored
couplings
have quick-lock couplings with which to fix the sensors to the meter.
Sensor data from
IDP sensors
IDP sensors transmit the following sensor data to the meter:
SENSOR ID
– Sensor name
– Sensor series number
Calibration data
Measurement settings
The calibration data are updated in the IDP sensor after each calibration proce-
dure. A message is displayed while the data are being updated in the sensor.
2.2.2 Automatic sensor recognition
The automatic sensor recognition for IDP sensors allows
to operate an IDP sensor with different meters without recalibrating
to assign measurement data to an IDP sensor
– Measurement datasets are always stored and output with the sensor
name and sensor series number.
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.
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. MD 8000 L) and a digital IDP sensor are
required.
In digital IDP sensors, sensor data are stored that clearly identify the sensor.
The sensor data are automatically taken over by the meter.
In the measured value display, you can display the sensor name
and series number of the selected sensor with the [
i ] softkey. You
can then display further sensor data stored in the sensor with the
[More] softkey (see section 5.1.5 SENSOR INFO, page 18).

MD 8000 L Technical data
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3 Technical data
3.1 Measuring ranges, resolution, accuracy
3.2 General data
Measuring ranges,
accuracy
Variable Measuring range Accuracy
Air pressure (abso-
lute)*
300 ... 1100 mbar ± 4 mbar
* Available only if a D.O. sensor is connected
Further data are given in the documentation of your sensor.
Dimensions Approx. 230 x 190 x 80 mm
(9.06 x 7.48 x 3.15 inches)
Weight Approx. 0.8 kg (1.76 pounds)
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
With the power pack connected:
+5 °C ... +40 °C
Admissible relative
humidity
Yearly mean: < 75 %
30 days/year: 95 %
Other days: 85 %
Power supply Batteries 4 x 1.5 V alkali-manganese batteries, type
AA
Operational life Approx. 150 h*
* The operational life is shorter is the display illumination is switched on permanently

Technical data MD 8000 L
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Power pack Helmsman Industrial Co Ltd SEI0901100P
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 0.5 A
Output: 9 Vdc, 1100 mA
Connection max. overvoltage category II
ShenZhen RiHuiDa Power Supply Co Ltd
RHD10W090110
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 0.4 A
Output: 9 Vdc, 1100 mA
Primary plugs Primary plugs contained in the scope of
delivery:
Euro, US, UK and Australian.
USB interface (device) Type USB 1.1
USB-B (Device), PC
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 (9.843 feet)
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
IP protection class EN 60529

MD 8000 L Commissioning
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4 Commissioning
4.1 Scope of delivery
Meter MD 8000 L
Power pack
USB cable (A plug on mini B plug)
Stand
Stand holder
Short instructions
CD-ROM with
– USB drivers
– Comprehensive operating manual (6 languages)
– Software MultiLab Importer
4.2 Power supply
The MD 8000 L is supplied with power in the following ways:
Mains operation with the supplied power pack
Battery operation (4 batteries, 1.5 V Mignon 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
Switch on the meter (see section 5.2 SWITCHING ON THE METER, page 19)
Set the date and time (see
section 5.4.5 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME, page
24)

Commissioning MD 8000 L
14 ba77218e01 11/2018
4.3.1 Inserting the batteries
4.3.2 Connecting the power pack
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. Open the battery compartment (1) on the underside of the meter.
1 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.
2. Place four batteries (type Mignon AA) in the battery compartment.
3. Close the battery compartment.
4. Set the date and time
(see section 5.4.5 EXAMPLE 2 ON NAVIGATION: SETTING THE DATE AND TIME,
page 24).
CAUTION
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see section 3.2 GEN-
ERAL DATA, page 11).
1

MD 8000 L Commissioning
ba77218e01 11/2018 15
4.3.3 Mounting the stand
The stand base can be mounted at the right side of the meter.
CAUTION
Use original power packs only (see section 3.2 GENERAL DATA,
page 11).
1. Connect the plug of the power pack to the socket for the power pack on
the MD 8000 L.
2. Connect the original power pack to an easily accessible power outlet.
1
2
8000 L
MD

Operation MD 8000 L
16 ba77218e01 11/2018
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 (press and
release) in this operating manual.
A long keystroke (press and keep depressed for 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.:
<F1>/[ i ]: View information on a sensor
<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)
Switches the AutoRead measurement on or off

MD 8000 L Operation
ba77218e01 11/2018 17
5.1.2 Display
Example (pH):
5.1.3 Status information (meter)
1 Status information (sensor)
2 Measured value
3 Measured parameter
4 Sensor symbol (calibration evaluation, calibration interval)
5 Measured temperature (with unit)
6 Status information (meter)
7 Softkeys and date + time
AR Stability control (AutoRead) is active
HOLD Measured value is frozen (<HOLD> key)
Batteries are almost empty
Data are automatically output to the USB-B interface at
intervals
3
2
1
4
5
7
HOLD AR
6
AutoCal TEC
i
01.11.2018
08:00 USB output
TEC

Operation MD 8000 L
18 ba77218e01 11/2018
5.1.4 Socket field
5.1.5 Sensor info
You can display the current sensor data and sensor settings of a connected
sensor at any time. The sensor data are available in the measured value
display with the <F1>/[
i ] softkey.
1 IDP sensors: (pH, ORP, conductivity, D.O.)
2 USB B (device) interface
3 Power pack
4 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).
VWR-IDP sensors meet these requirements.
1. In the measured value display:
Display the sensor data (sensor name, series number) with [<F1>
i ].
1234
25.0
7.007
pH
°C
01.11.2018
08:00
i
USB output

MD 8000 L Operation
ba77218e01 11/2018 19
5.2 Switching on the meter
2. Display further sensor data (settings) with <F1>/[More].
1. Switch the meter on with <On/Off>.
The meter performs a self-test.
2. Connect the sensor.
The meter is ready to measure.
25.0
7.007
pH
°C
More 01.11.2018
08:00
IDP 711
B09250001
pH resolution 0.001
mV resolution 0.1
Buffer TEC
Calibration interval 7d
Unit for slope mV/pH
Software version V1.00
IDP 711
B092500013
01.11.2018
08:00
Back
25.0
7.007
pH
°C
01.11.2018
08:00
i
USB output

Operation MD 8000 L
20 ba77218e01 11/2018
5.3 Switching off the meter
5.4 Navigation
5.4.1 Operating modes
5.4.2 Measured value display
In the measured value display, you can
open the menu for calibration and measurement settings with <OK> (short
keystroke)
open the system menu with the sensor-independent settings by pressing
<OK>Storage & config for a <OK_>long keystroke, approx. 2 s).
change the display in the selected measuring screen (e. g. pH ><− mV) by
pressing <MODE>.
5.4.3 Menus and dialogs
The menus for settings and dialogs in procedures contain further subelements.
The selection is done with the <><>keys. The current selection is dis-
played with a frame.
Submenus
The name of the submenu is displayed at the upper edge of the frame. Sub-
menus are opened by confirming with <OK>. Example:
1. Switch the meter 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