
39
#$%&(
' )* +
=)K
!=( I "
N)H(N:+
Signal Too High
Must Be =< 10 nA
The signal level during Zero
calibration is too high. Signal
"
=&
The solution used has too much
chlorine.
!
Q
;@A
pH Too High
Must be =< 9
G
?JP
G
"W
QG
pH Too Low
Must be >= 4
G
?J
G
"#
QG
FCl= – – – – – –
CHK pH SENSOR
G
G
!
G
QG
G+
Options Menu.
FCl= – – – – – –
CHK pH PREAMP
G
G
!
Damaged preamp.
QG
PN)H(N
recycle power afterward.
FCl= WRONG SENSOR
!
Different type of sensor is
connected.
!
under Option Menu.
Use correct sensor type.
PN)H(N
recycle power afterward.
Select correct sensor type under
Option Menu.