wtw pH 7110 - Instrument does not react to keystroke

pH 7110 What to do if...
ba75925e01 07/2011 41
10.3.3 Instrument does not react to keystroke
10.3.4 Displaying the software version (meter)
Cause Remedy
Operating condition undefined or
EMC load unallowed
• Processor reset:
Press the <ENTER> and
<On/Off> key simultaneously
Cause Remedy
E. g., a question by the service
department
• Switch on the meter.
During the display test, display
the software version with
<ENTER>.