Camlab CW/6210 Скачать руководство пользователя страница 13 | Manualshive

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Percentage calculation of the electrode status is ba-
sed both on asymmetry potentials and on slopes (gra-
dient of the pH characteristic) of the electrode. The
electrode condition is then determined by the worst
result. The admissible characteristic data of the pH
electrodes are as follows:

Asymmetry potential of the electrode at 25

°

C in mV

Max. admissible range:

+30...-30

mV

Optimum:

0

mV

Soiling of the electrode can have a major adverse ef-
fect on asymmetry.

[SL] = Slope of the electrode signal at 25

°

C in mV/pH

Admissible range:

-62...-50

mV/pH

Optimum:

-59,2

mV/pH

1-point calibration is always based on the optimum
theoretical value of –59.2mV/pH. The slope is not
shown in the menu.

For 2-point calibration, the slope is specified for the
entire measuring range.

For 3-point calibration, the slope is first displayed for
the lower, acid measuring range [SL. 1] and then for
the upper, basic range [SL. 2].

Camlab CW/6210 2/5/06 3:30 pm Page 13

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Содержание CW/6210

Страница 1: ...pH Redox Temperature Meter Instruction Manual Ref CW 72 12 20 Camlab Water Model CW 6210 Meas Cal Hold Rcl Store On Off Menu C pH Rel mV mV ATC OK CAL MEAS HOLD F C Camlab CW 6210 2 5 06 3 30 pm Page 1 ...

Страница 2: ...Camlab CW 6210 2 5 06 3 30 pm Page 2 ...

Страница 3: ...tion of temperature unit C F 14 8 5 Power off automatic unit switch off 14 9 Calibration of pH measurement 14 9 1 Starting calibration Press CAL key 16 9 2 Selecting buffer solutions 16 9 3 Calibration point 1 CAL 1 17 9 4 Calibration point 2 CAL 2 18 9 5 Calibration point 3 CAL 3 20 10 Result memory 21 10 1 Storing results 21 10 2 Displaying stored results 21 10 3 Deleting stored results 22 11 Er...

Страница 4: ...g strap 2 System description The system is a sturdy water tight handheld meter de signed for daily measurements in the area of field or laboratory analysis It is used to measure redox voltage and temperature in the field of environmental analysis as well as for ap plications in the food and chemical industries The system complies with the requirements in EN 60529 relating to protection class IP67 ...

Страница 5: ...dentifies Pt1000 and NTC 30 kOhm sensors The AUTO HOLD feature enables the user to identify stable results and call them up on the display The MEAS function is the standard continuous measu ring mode for pH levels or redox voltages pH calibration of the system is via an integrated auto matic buffer recognition feature The temperature characteristics of the standard buffer solutions and the referen...

Страница 6: ...ature sensor T 4mm 1 pin Temperature sensor REF and separately routed reference electrode if present 4mm 1 pin pH or redox electrode HF soc ket in acc with DIN 19262 T REF C pH RealmV mV ATC O CAL MAX MEAS MIN HOLD F C Meas CAL Hold KCl Store On Off Menu C pH Rel mV mV ATC OK CAL MEAS HOLD F C Meas Cal Hold Rcl Store On Off Menu 1 2 3 4 5 6 7 8 9 Camlab CW 6210 2 5 06 3 30 pm Page 6 ...

Страница 7: ... acceptance of unit configuration Menu Unit configuration Main diplay Result or user prompt mV Redox voltage absolute Rel mV Redox voltage relative to the hydrogen electrode DIN 38404 pH pH level Secondary display Result temperature or user prompt Percent sensor evaluation Warning index battery one point calibration C F Temperature unit ATC Automatic temperature compensation OK Stable measuring si...

Страница 8: ...ol appears together with bAt in the lower section of the display this means that the batte ries are nearly empty and need replacing However the unit will continue to function for a certain period of time If bAt appears in the upper section of the display this means that the batteries are comple tely empty Displayed values in the event of cable break or if no pH or redox electrode is connected If n...

Страница 9: ...torage and care of the electro des 7 Measurement Measuring mode MEAS After the unit is switched on it is automatically in the standard measuring mode MEAS You can switch to the standard MEAS measuring mode by pressing the Meas key The display shows the current possibly still fluctua ting result and MEAS If the result is stable the ok arrow appears in the display Measuring mode HOLD Pressing the Ho...

Страница 10: ...he electrode If a temperature sensor is connected temperature compensation is performed automatically ATC au tomatic temperature compensation The unit can automatically distinguish between a Pt1000 and an NTC30kOhm temperature sensor The sensor type is displayed if you simultaneously press the Meas and Hold keys If a temperature sensor is not connected you must manually enter the temperature of th...

Страница 11: ...s sing the Meas or Hold key Settings made up to this point are not stored The unit retains the previous settings 8 1 Input selection of measuring function pH mV Rel mV Select the desired measuring function using the keys The arrow in the display shows the selected func tion pH pH measurement with pH electrode mV redox measurement with redox electrode Rel mV redox measurement with redox electrode T...

Страница 12: ... calibration Calibration of the pH electrode is performed at three points 8 3 Display of electrode status only with pH function Indication of the electrode status that is computed internally during every calibration depending on the electrode used 100 The electrode is in excellent condition 30 90 The condition of the electrode is ade quate 30 The electrode is old or soiled If there is no improveme...

Страница 13: ...ge 30 30 mV Optimum 0 mV Soiling of the electrode can have a major adverse ef fect on asymmetry SL Slope of the electrode signal at 25 C in mV pH Admissible range 62 50 mV pH Optimum 59 2 mV pH 1 point calibration is always based on the optimum theoretical value of 59 2mV pH The slope is not shown in the menu For 2 point calibration the slope is specified for the entire measuring range For 3 point...

Страница 14: ...atic unit switch off is inactive 9 Calibration of pH measurement The individual sensor characteristics of pH electrodes are affected by ageing which causes fluctuations This is why prior to measurement it is important to check the current system calibration using buffer so lutions to ensure optimum measuring results If the calibration deviates from the ideal setting by more than a certain amount y...

Страница 15: ...atic temperature compensation for calibration Both the pH electrode signals and the pH buffer valu es are temperature dependent If a temperature sen sor is connected the temperature effect of the elec trode is compensated automatically during measure ment and calibration Otherwise you need to enter the actual temperature of the buffer as accurately as possible during calibrati on If you use the Ti...

Страница 16: ...tarting calibration Press Cal key CAL appears momentarily in the display You can terminate calibration at any time by pressing the Meas key or Hold key In this event the previous calibration setting is retained 9 2 Selecting buffer solutions buFF is shown in the main display You can choose between the various buffer series using the keys You then confirm the selected buffer set by pressing the Sto...

Страница 17: ...fer solution pH 7 00 and swirl carefully In the case of manual buffer setting Pt 1 appears in the secondary display You enter the pH value of the buffer solution using the keys You then confirm the input by pressing the Store key When Tintometer standard and DIN series solutions are used the system automatically detects the pH value of the solution CAL 1 appears in the secondary display until the ...

Страница 18: ...uring errors can occur with 1 point calibration particularly with results that are a long way from the calibration point 2 point calibration is therefore always advisable Clean the electrode using deionised water and dry carefully 9 4 Calibration point 2 CAL 2 only with 2 point and 3 point calibration Insert the electrode and the temperature sensor if pre sent in buffer solution 2 e g Tintometer s...

Страница 19: ...orm the next calibration step In the case of 2 point calibration the status of the electrode is then displayed asymmetry potential and slope the unit then switches to the standard measuring mode MEAS Without temperature sensor manual input of temperature of solution 2 You can enter the temperature of the second buffer solution using the keys The value is stored when you press the Store key and the...

Страница 20: ...ons are used the system automatically detects the pH value of the solution If the display flashes and switches between different buffers this means that no valid buffer has been de tected CAL 3 appears in the secondary display until the va lue is stable the detected buffer value is then automa tically stored In the case of 3 point calibration the status of the elec trode is then displayed asymmetr...

Страница 21: ...orresponding tem peratures can be stored 10 1 Storing results You can store the current result in the result memory by pressing the Store key Stor and the numer of the memory location appear briefly in the display 10 2 Displaying stored results You can call the stored results up in the display by pressing the RCL Recall key The first time you press the RCL key the number of the memory location and...

Страница 22: ...ys to select the desired ac tion and press the Store key to execute it The unit then returns to the corresponding measuring mode CLr ALL delete all stored results CLr LASt delete the last stored result CLr no do not delete any result 11 Error messages and troubleshooting Display Cause Remedy Weak battery voltage I nsert new batteries the unit will only continue to function for a short time Batteri...

Страница 23: ... in for repair Err 1 Exceeds Check can value measuring range exceed admissible measuring range Result too high Sensor Electrode Replace sensor defective electrode Err 2 Below Check can value measuring range be below admissible measuring range Result too low Sensor Electrode Replace sensor defective electrode Err 7 System error Send in for repair Err 11 Value could not Temperature outside be calcul...

Страница 24: ...sable solution CAL Err 2 Slope too small Replace electrode Electrode defective Buffer solution Use fresh buffer unusable solution CAL Err 3 Slope too big Replace electrode Electrode defective Buffer solution Use fresh buffer unusable solution CAL Err 4 Wrong temperature Calibration only during calibration possible in range from 0 60 C Camlab CW 6210 2 5 06 3 30 pm Page 24 ...

Страница 25: ...0 C otherwise 0 4 C pH 0 01 pH Redox 0 1 FS mV bzw Rel mV Temperatur With temperature sensor automatic tempera compensation ture compensation ATC is performed in the measuring modes pH and Rel mV Without temperature sensor the temperature must be entered manually Sensor connections Temperature two 4mm 1 pin sockets Temp and Ref temperature sensors Pt1000 and NTC30k pH Redox DIN19262 socket separat...

Страница 26: ...matic Off if no key is pressed and no data function transfer is occurring the unit switches off after the switch off delay time May be set between 1 and 120 minutes or inactive pH Calibration 1 point 2 point or 3 point calibration standard buffer DIN buffer or user selected buffer Automatic buffer temperature dependence of standar recognition or DIN buffer is automatically compen sated admissible ...

Страница 27: ...de Type 225 plastic gel filled TT 72 12 30 pH Electrode Type 230 with temperature Sensor NTC 30 kOhm plastic gel filled TT 72 12 35 pH Electrode Type 235 glass gel filled TT 72 12 40 ORP Electrode Type 240 plastic gel filled TT 72 12 45 Temperatur Sensor Pt 1000 TT 72 12 50 pH Buffer Set 4 00 7 00 10 00 25 C RW 1040 pH Buffer 4 00 25 C 1 Litre RW 1070 pH Buffer 7 00 25 C 1 Litre RW 1100 pH Buffer ...

Страница 28: ...mited Camlab House Norman Way Over Cambridge CB4 5WE Tel 01954 233110 Fax 01954 233101 www camlab co uk camlab Choice Service and Trust Technical changes may occur without notice Camlab CW 6210 2 5 06 3 30 pm Page 28 ...

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