User guide

I-E67-84-1B February,2002 8-9
the Smart Key to increment and the Smart
Key to move. The ENTER Smart Key accepts the
new value. See Section 13, Diagnostics, for
more information on diagnostic reporting.
The reference impedance of a new ABB sensor is
typically 1 to 2 kohms as measured by the
diagnostic circuit of the TB84PH Advantage
Series analyzer. Performance of the reference
electrode is typically unaffected up to 100
kohms (i.e., the default REF Z value).
Adjustment to other resistance values up to
1000 kohms is allowed; however, acceptable
performance of the sensor must be determined
by the user and the resistance values
accordantly adjusted.
For the CUSTOM State, the ISO.PT (i.e.,
Isopotential pH value) and ASY.POT (i.e.,
Asymmetric Potential value) must be entered
using the Smart Key to increment the
blinking digit, the Smart Key to move to
the next digit, and the ENTER Smart Key to
enter the new value. The REF Z value can also
be adjusted and must be set as previously
described.
ORP and pION States (Basic/Advanced)
The ORP or pION Analyzer States are set by
pressing the ENTER Smart Key on the desired
state when displayed using the NEXT Smart Key.
For Advanced configurations, the ORP and pION
States will require the user to enter the REF
Z value. The REF Z (i.e., reference
impedance) is the reference electrode
impedance value that will trigger a diagnostic
condition.