PH1210
DIGITAL pH-METER AUTO CAL/DATA STORAGE
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17
Switching off time
The meter will switch off automatically if any keys is not pressed within the time configured in the SET
UP menu.
The meter is delivered with the automatic switching off time of 90 seconds but it can be modified to
30/600 seconds by means of the following procedure.
[SHIFT]
push the key from the main display. The message
Set-up
will appear.
[SHIFT]
push the key. The p/n and the firmware release will appear.
[INCR]
push the key 3 times. The messages
Auto Off
and the actual value in sec. will appear.
[SHIF]
push the key to read the time value with the flashing cursor on the last digit
XXX s
[INCR]
push the key to modify the last digit if necessary
[SHIFT]
push the key to position the cursor on the other digit to be modified with same procedure.
[ENTER]
push the key for 3 seconds to confirm the adjusted value.
The message
Update
will appear
If the new value is out of the accepted limits the display will show
min/Max 0/600 s
for few
seconds.
The display will show the p/n and the firmware release.
[MODE]
push the key two times to turn to the main display.
5.1.6 MAINTENANCE OF THE UNIT
Quality components are used to give the controller a high reliability.
In this way it needs just the battery replacement.
Battery replacement
The meter controls the voltage of the battery.
If the value is lower than 7.5 volt the display will show the message
Low Batt.
The meter will switch off automatically if the battery voltage is lower than 6.5 volt.
To replace the battery, remove the cover of the battery place on the back of the instrument.
Replace the 9 VDC battery,
Place the battery cover in the previous position.
5.1.7 MAINTENANCE OF THE SENSOR
The state of the electrode's surface is critical for the normal operation of the system and should be
inspected more frequently when using alkaline liquids, oil and grease containing water, and bio-
applications.
Suggested methods for cleaning the electrode include chemical cleaning (except hydrofluoric acid)
and washing detergents:
-
dip the sensor for 30 seconds in a 5% HCl solution or detergent in case of grease contamination,
-
rinse thoroughly the sensor into deionised water,.
5.2 STORAGE AND TRANSPORTATION
In case of long storage period, keep the instrument in a dry area.
In case of tranportation, use the original suitcase.
Содержание PH1210
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