The pH 7110 compact digital precision meter enables you to perform pH and
ORP measurements quickly and reliably.
The pH 7110 provides the maximum degree of operating comfort, reliability and
measuring certainty for all applications.
1 Keypad
2Display
3 Socket field
1.2Sensors
A measuring system ready to measure consists of the pH 7110 meter and a
suitable sensor.
The pH 7110 can be operated with the following sensors:
• pH electrode
• ORP electrode
Information on available sensors is given on the Internet and in the
WTW catalog, "Laboratory and field instrumentation".
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SafetypH 7110
2Safety
2.1Safety information
2.1.1Safety 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 information 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:
WARNING
indicates a possibly dangerous situation that can lead to
serious (irreversible) i njury or death if the safety inst ruction is
not followed.
CAUTION
indicates a possibly dangerous situation that can lead to
slight (reversible) injury if the safety instruction is not
followed.
NOTE
indicates a possibly dangero us situation where goods might be damaged
if the actions mentioned are not taken.
2.1.2Safety 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.
2.1.3Further 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.)
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pH 7110Safety
2.2Safe operation
2.2.1Authorized use
This meter is authorized exclusively for pH and ORP measurements in the
laboratory.
Only the operation and running of the meter according to the instructions and
technical specifications given in this operating manual is authorized (see
section 11 T
Any other use is considered unauthorized.
2.2.2Requirements 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).
ECHNICALDATA, page 42).
2.2.3Unauthorized 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 11 T
ECHNICALDATA, page 42).
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CommissioningpH 7110
3Commissioning
3.1Scope of delivery
• pH 7110 meter
• 4 batteries 1.5 V Mignon type AA
• Power pack
• Stand
• Stand holder
• Short instructions
• Detailed operating manual (4 languages)
• CD-ROM with detailed operating manual
3.2Power supply
The pH 7110 is supplied with power in the following ways:
• Mains operation with the supplied power pack.
• Battery operation (4 x alkaline manganese batteries, type AA)
3.3Initial commissioning
Perform the following activities:
• Insert the supplied batteries
• Connect the power pack (mains operation)
• Mount the stand
• Switch on the meter
(see section 4.2 S
3.3.1Inserting the batteries
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.
WITCHINGONTHEMETER, page 15)
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pH 7110Commissioning
2
1.Open the battery compartment (2) on the underside of the meter.
2.Insert four batteries in the battery compartment.
CAUTION
Make sure that the poles of the batteries are positioned
correctly.
The ± signs on the batteries must correspond to the ± signs
in the battery compartment.
3.Close the battery compartment tightly.
When the batteries are nearly empty, the [LoBat] status indicator is
displayed.
3.3.2Connecting the power pack
CAUTION
The line voltage at the operating site must lie withi n the input
voltage range of the or iginal po wer pack (see section 11 T
NICALDATA, page 42).
ECH-
CAUTION
Use original power packs only (see section 11 T
ECHNICALDATA,
page 42).
1.Connect the plug of the power pack to the socket for the power pack on
the pH 7110.
2.Connect the original power pack to an easily accessible power outlet.
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CommissioningpH 7110
1
2
3.3.3Mounting the stand
The stand base can be mounted at the right side of the meter.
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pH 7110Operation
4Operation
4.1General operating principles
This section contains basic information on the operation of the pH 7110.
4.1.1Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <ENTER>) generally indicates a short keystroke (under
2 sec) in this operating manual. A long keystroke (approx. 2 sec) is indicated
by the underscore behind the key symbol (e.g. <ENTER__>).
KeySymbolMeaning
<On/Off>
<On/Off__>
<M>
<M__>
<CAL>
<CAL__>
<><>
<__><__>
<ENTER>
<ENTER__>
Switches the meter on or off
Resets calibration data
Selects the measured parameter
Opens the measurement settings
Calls up the calibration procedure
Displays the calibration data
Confirms entries
Opens the menu for system settings
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OperationpH 7110
8
88
8
8
1
8
8
8
°
C
°F
UpH
mV/pH
LoBat
AutoCal DIN
AutoCal TEC ConCalAR
TP
CalError
%
Time
3
2
4
5
1
4.1.2Display
1 Status information
2 Measured value (with unit)
3 Measured parameter
4 Sensor symbol (calibration evaluation, calibration interval)
5 Measured temperature (with unit)
4.1.3Status information
DisplayMeaning
[AutoCal TEC]
[AutoCal DIN]
[ConCal]Calibration with any buffers
[CalError]An error occurred during calibration
[AR]Stability control (AutoRead) is active
[TP]Temperature measurement active
Calibration with automatic buffer recognition, e.g. with the
buffer set: Technical buffers
[Time]Setting of calibration interval
[LoBat]Batteries are almost empty
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pH 7110Operation
1
2
3
4
5
8
4
2
2
9
9
6
pH
°
C
TP
AR
4.1.4Socket field
1 pH electrode
2 Reference electrode
3 Temperature sensor
4 Power pack
5 Service interface
4.2Switching on the meter
1.Switch on the meter with <On/Off>.
The meter performs a self-test.
The meter switches to the measuring mode (measured value display).
2.Connect the sensor.
The meter is ready to measure.
4.3Switching off the meter
1.Switch off the meter with <On/Off>.
The meter is switched off.
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OperationpH 7110
When the meter is powered by the batteries, it switches itself off
automatically after an adjustable interval to save the batteries (see
section Automatic switch-off function, page 32).
4.4Navigation
4.4.1Operating modes
The meter has the following operating modes:
Operating modeDescription
MeasuringThe measurement data of the connected sensor are
shown in the measured value display
CalibrationThe course of a calibration with calibration informa-
tion, functions and settings is displayed
Transmitting dataThe meter transmits measuring data and calibration
records to a USB-B interface automatically or manually.
SettingA setting is displayed.
4.4.2Measuring mode (measured value display)
The following functions are available in the measuring mode (measured value
display):
• Change the display in the selected measuring window (e. g. pH <-> mV) by
pressing <M>
• To open the measurement settings, press <M__> (long pressure).
• To open the system settings, press <ENTER__> (long pressure).
4.4.3Setting mode
The following functions are available in the setting mode:
• To change the current setting, press <><>.
• Confirm the setting with <ENTER>.
The next setting is displayed.
The settings are stored.
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