Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 48)

IM 12B07D02-01E
Operation 4-3
4-3. Setting passcodes
4-3-1. Passcode protection
In Service Code 52, EXA users can set passcode protection for each one of the three operating levels,
or for any one or two of the three levels. This procedure should be completed after the initial commis-
sioning (setup) of the instrument. The passcodes should then be recorded safely for future reference.
When passcodes have been set, the following additional steps are introduced to the configuration and
programming operations:
Maintenance
Press MODE key. The display shows 000 and *PASS*
Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Maintenance Mode
Commissioning
Press * key. The display shows 000 and *PASS*
Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Commissioning Mode.
Service
From the commissioning menu, select *SERV by pressing YES key. The display shows 000 and *PASS*
Enter a 3-digit passcode as set in Service Code 52 to obtain access to the Service Mode.
NOTE:
See Service Code 52 for the setting of passcodes.
4-4. Display examples
The following pages show the sequence of button presses and screens displayed when working in some
standard configurations.
More or less options will be made available by the configuration of some service codes. For instance the
impedance measurement screens do not appear when impedance checking is switched off in service
codes 03 and 04.