GREISINGER G 7500 Series Operating Manual
Operating Manual
Water analysis – hand-held
meter
G 7500 series
Keep for later use.
www.ghm-group.de
Companies / Brands of the GHM
Englisch
H87.0.0X.6C-01 Operating manual G 7500 Series page 2 of 34
Index
1 GENERAL NOTE ............................................................................................................... 3
2 SAFETY ................................................................................................................................ 3
2.1 INTENDED USE .................................................................................................................. 3
2.2 SAFETY GUIDELINES .......................................................................................................... 3
2.3 QUALIFIED PERSONNEL ...................................................................................................... 3
2.4 SAFETY SIGNS AND SYMBOLS ............................................................................................ 4
2.5 FORESEEABLE MISUSE ....................................................................................................... 5
2.6 SAFETY INSTRUCTIONS ...................................................................................................... 5
3 PRODUCT SPECIFICATION ........................................................................................... 7
3.1 SCOPE OF DELIVERY .......................................................................................................... 7
3.2 OPERATING AND MAINTENANCE ....................................................................................... 7
3.3 CONNECTIONS ................................................................................................................... 7
3.4 SUPPORT AND RETAINING CLIP ........................................................................................... 8
4 OPERATION ....................................................................................................................... 9
4.1 KEYPAD ............................................................................................................................ 9
4.2 STATUS LINE ................................................................................................................... 10
4.3 DISPLAY ELEMENTS ......................................................................................................... 10
5 START OPERATION ....................................................................................................... 11
6 BASICS OF THE MEASUREMENT .............................................................................. 11
6.1 PH MEASUREMENT .......................................................................................................... 11
6.2 BASICS ABOUT CONDUCTIVITY ........................................................................................ 15
6.3 CONDUCTIVITY MEASUREMENT ....................................................................................... 15
6.4 ELECTRODES / MEASURING CELLS ................................................................................... 15
6.5 TEMPERATURE COMPENSATION ....................................................................................... 16
6.6 DESIGN OF THE SENSOR GWO 5610 ................................................................................ 17
6.7 COMMISSIONING / FILLING OF THE SENSOR GWO 5610 ................................................... 19
6.8 SENSOR GWO 5610 MAINTENANCE ................................................................................ 20
6.9 BASICS ABOUT OXYGEN MEASURING ............................................................................... 21
6.10 AMBIENT PRESSURE AND MEASURING DEPTH OF THE ELECTRODE ................................ 21
6.11 CORRECTION OF SALINITY ............................................................................................ 21
7 CONFIGURATION........................................................................................................... 22
7.1 DEVICE MENU .................................................................................................................. 22
7.2 PH CHANNEL MENU ......................................................................................................... 25
7.3 TEMPERATURE CHANNEL MENU ....................................................................................... 27
7.4 OXYGEN CHANNEL MENU ................................................................................................. 27
7.5 CONDUCTIVITY CHANNEL MENU ...................................................................................... 28
8 ERROR CODES (IN DATASET) .................................................................................... 29
9 CALIBRATION ................................................................................................................. 30
9.1 GENERAL INFORMATION .................................................................................................. 30
9.2 PH CALIBRATION ............................................................................................................. 30
9.3 O
2
CALIBRATION ............................................................................................................. 30
10 CALIBRATION AND ADJUSTMENT SERVICE ..................................................... 31
11 REPLACING RECHARGEABLE BATTERIES ....................................................... 31
12 RESHIPMENT AND DISPOSAL ................................................................................. 32
H87.0.0X.6C-01 Operating manual G 7500 Series page 3 of 34
12.1 RESHIPMENT ................................................................................................................ 32
12.2 DISPOSAL ..................................................................................................................... 32
13 SPECIFICATION .......................................................................................................... 33
13.1 MEASUREMENTS AND ACCURACY ................................................................................. 33
13.2 GENERAL SPECIFICATION .............................................................................................. 34
14 TERMS OF LICENSE ................................................................................................... 34
14.1 FREERTOS .................................................................................................................. 34
14.2 FATFS .......................................................................................................................... 34
1 General Note
Read this document carefully and get used to the operation of the device before you
use it. Keep this document within easy reach near the device for consulting in case
of doubt.
2 Safety
2.1 Intended Use
The device is exclusively designed for measuring of pH and conductivity or pH and
dissolved oxygen in water (saltwater and freshwater).
Personnel which starts up, operates and maintains the device has to have sufficient
knowledge of the measuring procedure and the meaning of the resulting measured
values, this manual delivers a valuable help for this. The instructions of the manual
have to be understood, regarded and followed.
To be sure that there´s no risk arising due to misinterpretation of measured values,
the operator must have further knowledge in case of doubt - the user is liable for any
harm/damage resulting from misinterpretation due to insufficient knowledge.
The manufacturer will assume no liability or warranty in case of usage for other
purpose than the intended one, ignoring this manual, operating by unqualified staff
as well as unauthorized modifications to the device.
2.2 Safety guidelines
This device has been designed and tested in accordance with the safety regulations
for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the
standard safety measures and special safety advises given in this manual will be
adhered to when using the device.
2.3 qualified personnel
The device may only be installed by qualified personnel who have read and
understood this manual and who are able to use the devices professionally. Qualified
personnel are persons who are familiar with the installation, assembly,
commissioning and operation of these devices and who have the necessary
qualifications to carry out their duties.
H87.0.0X.6C-01 Operating manual G 7500 Series page 4 of 34
2.4 Safety signs and symbols
The following signs in this document highlight warnings:
Caution! This symbol warns of imminent danger, death, serious
injuries and significant damage to property at non-observance.
This symbol indicates danger for living tissue as well as a variety of
materials, which can be damaged or destroyed when coming into
contact with this chemical. Caustic effect, protective equipment
required!
This Symbol indicates dangers to all living beings that may result in
death or acute or chronic health hazards when inhaled, swallowed, or
absorbed through the skin of this chemical.
This Symbol indicates irritant substances that can cause inflammation
on short-term, prolonged or repeated contact with the skin or mucous
membranes.
Attention! This symbol warns of possible dangers or dangerous
situations that can provoke damage to the device or environment at
non-observance.
Note! This Symbol indicates operations which, if ignored, may have an
indirect effect on operation, possibly leading to incorrect measurement
results or triggering an unforeseen reaction.
This symbol instructs the use of eye protection which protects the eyes
from harmful influences when working with powerful light, UV radiation,
laser, chemicals, dust, splinters or weather influences.
This symbol instructs the use of protective gloves which offer
protection from mechanical, thermal, chemical, biological or electrical
hazards.
H87.0.0X.6C-01 Operating manual G 7500 Series page 5 of 34
2.5 Foreseeable misuse
The fault-free function and operational safety of the product can only be guaranteed if
generally applicable safety precautions and the device-specific safety instructions for
this document are observed.
If these notices are disregarded, personal injury or death, as well as property damage
can occur.
This device must not at all be used in potentially explosive
environment! The usage of this device at potentially explosive areas
increases danger of deflagration, explosion or fire due to sparking.
This device is not suitable for medical applications.
The device is not suitable for direct contact with food products.
Take samples and dispose them correctly after the measurement.
2.6 Safety instructions
This device has been designed and tested in accordance with the safety regulations
for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the
standard safety measures and special safety advises given in this manual will be
adhered to when using the device.
The O2 sensor contains potassium hydroxide. This causes burns. All
contact with the skin, clothing and eyes should be avoided.
Nevertheless, should contact occur, take
the following measures.
– Eyes: Flush with flowing water for at least 15 minutes, seek medical
attention!
– Skin: Wash with large amounts of water for several minutes!
– Clothing: Remove immediately!
– If swallowed: Drink large amounts of water, do not induce vomiting
and seek medical
Attention!
If there is a risk whatsoever involved in running it, the device has to be
switched off immediately and to be marked accordingly to avoid restarting.
Operator safety may be a risk if:
- there is visible damage to the device
- the device is not working as specified
- the device has been stored under unsuitable conditions for a longer
time.
In case of doubt, please return device to manufacturer for repair or
maintenance.
H87.0.0X.6C-01 Operating manual G 7500 Series page 6 of 34
Do not use this product as safety or emergency stop devices or in any
other application where failure of the product could result in personal
injury or material damage.
Failure to comply with these instructions could result in death or
serious injury and material damage
When interacting with chemicals at least the following points must be
ensured:
1. Obey all notes on the container of chemicals.
2. Obey all notes in the safety specification sheet of chemicals.
3. Consider any statutory provisions guidelines and guidelines of
chemicals when disposing!
This is also for accidentally spilled chemicals, dried residues,
soiled rags or similar.
4. Always wear suitable protective clothing (e.g. protection goggles,
safety gloves, face mask, etc.)!
5. Never eat, drink or smoke in the operational area of chemicals!
6. In case of problems instantly consult skilled personnel.
Suitable clean-up possibilities (eye wash, etc.) must exist
within spitting distance!
Trouble-free operation and reliability of the device can only be
guaranteed if the device is not subjected to any other climatic
conditions than those stated under specification
H87.0.0X.6C-01 Operating manual G 7500 Series page 7 of 34
3 Product Specification
3.1 Scope of delivery
The scope of supply includes:
Device with 3 rechargeable batteries type AAA
Short manual
Operating manual and calibration protocol as pdf file in mass storage memory.
3.2 Operating and Maintenance
1. Battery operation:
If the battery has been used up and needs to be recharged, the device will display
BAT. in the upper status line. The device will, however, continue operating correctly
for a certain time.
The battery has been completely discharged, if batteries empty is shown in the
main display and the red backlight will blink. The device will than turn off
automatically.
The device has a deep discharge protection, when the batteries
reach a limit value, the device can no longer be turned on!
2. Treat device and electrodes carefully. Use only in accordance with above
specification (do not throw, hit against etc.).
The measuring values can be influenced by contamination.
3.3 Connections
Front view
Connector
Probetype (standard)
BNC
pH (GE 125)
Banana
6 mm
(GND)
Resistive temperature probe
(PT 1000 or NTC 10 k)
common, needed only for
separate temperature probe
Banana
6 mm (T)
Resistive temperature probe
(GE 125 banana plug)
7-pol. LTW
Oxygen (GWO 5610) or
conductivity (LF 425)
Micro USB
For power supply or device
communication
Waterproofness is only guaranteed for plug connections in the
plugged-in state in combination with waterproof cable plugs.
The temperature measurement can be influenced by conductive
liquids on the banana sockets. We recommend always keeping the
connections dry.
H87.0.0X.6C-01 Operating manual G 7500 Series page 8 of 34
3.4 support and retaining clip
The stand is provided as a means to prop up or support the device in a stable
surface, for hanging on the wall or for attachment to a belt.
Instruction:
- Leave the stand collapsed in order to lay the product flat on a stable surface or
to hang it on a belt.
- Pull the grip labelled open in order to fold it out to a 90° angle. Now, the
product can be positioned on a stable surface.
- Pull the grip labelled open again in order to fold it out to a 180° angle. Now the
product can be hung.
- The product can be positioned ideally so that the display can always be read
clearly and easily depending on its use.
Pop-up clip closed
Pop-up clip at position 90°
Pop-up clip at position 180°
Device attached to a belt
Device set up on a table
Device suspended from
magnetic holder
GMH 1300
H87.0.0X.6C-01 Operating manual G 7500 Series page 9 of 34
4 Operation
4.1 Keypad
With the keypad the device functions, display
mode, etc. can be set by user interaction.
The display will contain specific information for the
F1 and F2 soft-keys.
F1 and F2 soft-key
Depending to the device state (view, menu,
channel, …) the dark accentuated texts in the
display directly above the soft-keys are describing
the soft-keys function (e.g. ‘back’ for F1 and
‘change’ for F2).
power button
Will turn the device on (only when rechargeable
batteries are not empty) or off (only when the logger
is not running).
device settings
Will open the device-settings-menu.
Here anything that’s not related to a physical
measuring e.g. the date, time USB-mode and
language can be changed.
directional pad (up, down, right, left)
For navigation within a menu, for changing the
selected channel (up and down) or changing the
view (right and left).
H87.0.0X.6C-01 Operating manual G 7500 Series page 10 of 34
4.2 Status line
The status line is the first line in the display.
Display
Meaning
Current time
If time is flashing, time must be reseted
!
Internal memory error. When this error won’t
disappear after restarting the device, it should
be returned for repairing. The device will go to a
safe fallback mode were device settings are
stored and recalled from the mass storage
memory if this is available.
S
Saving to the internal mass storage memory
takes longer than intended. When the S will be
shown permanently in the display, please let
Windows check the mass storage device for
errors. When the S still shows up, the device
needs to be send back for repairing.
A
Alarm of a channel is active
USB
USB connection has been established.
LOG
Logger is active
BAT
Rechargeable battery capacity critically low
Battery indicator
If the battery capacity flashes, the battery is
being charged
4.3 Display elements
Views can be changed by the right and left keys of the directional pad. With the keys
up and down the channel can be changed.
Table view
Chart view
Large view
All channels in one row
Chart of one channel
Display of one channel
with specific parameters
(here: electrode quality
and temperature
compensation)
H87.0.0X.6C-01 Operating manual G 7500 Series page 11 of 34
4.3.1 Menu
Depending on the selected channel, you can switch to the channel configuration
menu by pressing the function key F2. Here, channel-specific settings can be made.
5 Start operation
Charge the rechargeable batteries by connecting a power supply or the computer to
the micro USB connector.
Connect all desired probes or electrodes.
Turn on the device by pressing the power button.
Change date, time and language by pressing the device settings key and save the
changes made.
6 Basics of the measurement
At first the basics of all measurements will be depicted. Some channel specific
settings depend on these basics.
6.1 pH measurement
The pH value describes the acidic or alkaline behavior of an aqueous solution.
pH values below 7 are acidic (smaller values indicate higher acidity), and values
above 7 are alkaline; pH 7 = neutral.
The pH measurement is very precise, but also sensitive. The measured signals are
very weak (high-impedance), especially when measured in weak or low-ion media.
Therefore, always take measures to
To determine the pH value of a solution, its temperature needs to be
known. The reason is that most liquids change their pH value with the
temperature.
- avoid interference (electrostatic charges, etc.)
- keep plug contacts clean and dry
- prevent electrodes (except special waterproof versions) from extended
immersion above the shaft
- calibrate the electrode at sufficient intervals (see below). The frequency of
calibration can range from every hour to several weeks, depending on the
electrode and the application.
- use a suitable electrode. See chapter Fehler! Verweisquelle konnte nicht
gefunden werden.
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