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Operating Manual

Water analysis

– hand-held

meter

G 7500 series

Keep for later use.

www.ghm-group.de

Companies / Brands of the GHM

Englisch

Содержание G 7500 Series

Страница 1: ...Operating Manual Water analysis hand held meter G 7500 series Keep for later use www ghm group de Companies Brands of the GHM Englisch...

Страница 2: ...UCTIVITY 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...

Страница 3: ...g 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 know...

Страница 4: ...in 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 p...

Страница 5: ...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 u...

Страница 6: ...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 o...

Страница 7: ...s 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 no...

Страница 8: ...ang 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...

Страница 9: ...isplay 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 o...

Страница 10: ...en 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 chan...

Страница 11: ...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 s...

Страница 12: ...measured can be designed in different ways Clogging or soiling of the diaphragm is a frequent cause of a malfunctioning or sluggish electrode Always handle the glass membrane with extreme care The so...

Страница 13: ...used for small sample amounts It comprises a glass electrode with two ceramic diaphragms and liquid electrolyte GE 104 BNC is preferably used for measurements in low ionic media such as rainwater aqua...

Страница 14: ...rnail or cloth and is therefore does not constitute a defect or cause for complaint Dirty electrodes must be cleaned The suitable cleaning agents for the pH glass membrane are listed in the table belo...

Страница 15: ...500 0 S cm Within the integrated automatic range selection the range with the best resolution is automatically selected 6 4 Electrodes measuring cells 6 4 1 Design and selection Basically there are t...

Страница 16: ...ording to EN 27888 is sufficiently accurate Recommended application range of nLF compensation between 60 S cm and 1000 S cm 6 5 2 Linear temperature compensation If the actual function needed for exac...

Страница 17: ...ular when it is stored in dry air Therefore it should be checked and maintained regularly and replaced as necessary The electrode contains potassium hydroxide This causes burns All contact with the sk...

Страница 18: ...lyte must be filled or added for the initial commissioning of a sensor which is delivered dry when performing maintenance or after use at high temperatures 6 6 3 Service life The sensor signal deterio...

Страница 19: ...platinum cup A rapid or excessive formation of lead carbonate after commissioning is an indication of air in the sensor This is usually due to incomplete filling or a leak due to improper fitting of t...

Страница 20: ...emove filling screw and top up lost electrolyte e g using disposable syringe 4 Put back and tighten filling screw 5 Top up diaphragm head with electrolyte avoiding air bubbles and place on table cover...

Страница 21: ...es the oxygen concentration mg l the oxygen saturation from the electrode signal and the temperature According to DIN38408 C22 all measurements refer to steam saturated air 6 10 Ambient pressure and m...

Страница 22: ...ly pressing the Up button and the Down button you can scroll through the parameters Select the parameter you would like to configure 4 When you have selected the desired parameter select them with the...

Страница 23: ...cember 2020 at 19 11 The CSV files are then located in the folder DATA 20201231 1911 Single shot logger data is always stored inside the HISTORY directory Calibration data are stored like logger data...

Страница 24: ...e logger is running the F1 key will be entitled with stop and can be stopped by pressing the F1 key 7 1 4 3 on keypress With on keypress one measuring will be added to the files inside the HISTORY dir...

Страница 25: ...the temperature is measured from the reference channel 7 2 2 reference channel Here the cannel for the ATC can be selected 7 2 2 1 banana sockets Reference temperature measured from RTD on banana soc...

Страница 26: ...For calibration the standard buffers for the GMH handheld instruments are used These are pH 4 red pH 7 green und pH 10 blue 7 2 3 2 DIN standard For calibration DIN standard buffers are used pH 1 680...

Страница 27: ...k When other electrodes are used the setting has to be changed manually Pt1000 is normally the correct setting for temperature pH as it s standard electrode is the GE 125 When using different electro...

Страница 28: ...e are preconfigured with the electrode s cell factor 7 5 2 auto range Automatic range selection of the conductivity measurement is active auto range 0 S cm 500 mS cm 7 5 3 range Manual range selection...

Страница 29: ...tarting wait shortly 100000017 data pointer error restart device 100000018 data invalid restart device 100000020 recording stopped logger has been stopped 100000021 recording started logger has been s...

Страница 30: ...ers to determine the temperature of the buffer solutions if no GE 125 or similar is used Start the calibration process see above Follow the instructions of the device Clean the electrode and immerse i...

Страница 31: ...g a deviation of the measuring device DAkkS calibration certificates are accompanied with a list of individual measurements before and after the adjustment documentation and if applicable graphic repr...

Страница 32: ...ected Insert device into silicone cover 12 Reshipment and disposal 12 1 Reshipment All devices returned to the manufacturer have to be free of any residual of measuring media and other hazardous subst...

Страница 33: ...5 FS temperature compensation automatic 0 0 50 0 C salinity correction off 0 70 g kg accuracy requirements Ta Tm 20 C 100 sat O2 direct flow 20 cm s conductivity suggested probe LF 425 with Pt 1000 t...

Страница 34: ...support and retaining clip dimension 160 x 86 x 37 mm H x B x T incl silicone cover weight approx 300 g incl rechargeable batteries scope of supply device rechargeable batteries micro USB cable and sh...

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