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English 18259
Display is totally clear or totally dark
• Set the rotary dial to MENU switch on and leave unit for five minutes.
• Press UP three times (listen for three beeps) then press ENTER
• Press and hold down UP until the display becomes visible again (this can take
up to 20 seconds). Use UP and DOWN to adjust the display's contrast.
• Press ENTER to exit.
The analyser continually beeps and the display has frozen.
• You have exited a menu function without completing the required sequence.
• Rotate the dial back to MENU
• Press ENTER until MENU appears on the top line
- (NB You may be changing settings when you do this)
• Rotate the dial to the required display position.
The unit will not turn off.
• Do not hold down the on/off button.
• Try connecting the charger.
9. ANNUAL RECALIBRATION AND SERVICE
Although sensor life is typically more than two years the analyser should be re-
calibrated and serviced annually to stop any long-term sensor or electronics drift or
accidental damage.
Local regulations may require more frequent re-calibration.
SERVICE MODE
This mode can be selected from MENU and gives password protected access to
certain functions WARNING: entering inappropriate codes may corrupt the
calibration of this instrument.
The User level pass code to view software issue is 1111
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