Hach POLYMETRON 9135 - Page 66

Transmitter 9135 - pH/redox measurement
Page 62
The glass electrode impedance is inferior to the limits
set by the user. It is required to :
- change the limits (SERVICE / IMPEDANCES /
GLASS / LOWER) or,
- change the broken electrode.
The reference electrode impedance is inferior to the
limits set by the user. It is required to :
- change the limits (SERVICE / IMPEDANCES /
REFERENCE / LOWER) or,
- change the damaged electrode.
The reference electrode impedance is superior to the
limits set by the user. It is required to :
- change the limits (SERVICE / IMPEDANCES /
REFERENCE / UPPER) or,
- clean the clogged electrode or change the poisoned
electrode.
The time out of the neutral zone is superior to the limit
programmed by the user. It is required to :
- change the limits
- check the relays S1 and S2.
7.9
pH
GLASS IMPED.
TOO LOW
10.1
pH
REF. IMPED.
TOO LOW
6.4
pH
REF. IMPED.
TOO HIGH
5.8
pH
REGULATION
TOO LONG