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8 SIMPLE FAULT FINDING
8.1 Error Messages
If erroneous or unexpected results are obtained, the fault may be
indicated in the Operating Page by an error message – see Table
8.1. However, some faults may cause problems with analyzer
calibration or give discrepancies when compared with
independent laboratory measurements.
E
r r
r o
M
e
s s
a
g
e
P
o
s s
b i
A
:
F
A
U
L
T
Y
P
T
1
0
0
e T
m
p
e
A
:
F
A
U
L
T
Y
P
T
1
0
0
0
c
o
n
n
c e
A
:
F
A
U
L
T
Y
B
A
L
C
O
c
c r i
t i u
B
:
F
A
U
L
T
Y
P
T
1
0
0
e T
m
p
e
B
:
F
A
U
L
T
Y
P
T
1
0
0
0
c
o
n
n
c e
B
:
F
A
U
L
T
Y
B
A
L
C
O
c
c r i
t i u
A
h t l
o
u
A
:
C
A
L
L
O
W
S
L
O
P
E
e
e l
t c
o r
B
:
C
A
L
L
O
W
S
L
O
P
E
n i
i d
a c
e r
p
a l
e c
T
h
e
a c
A
:
P
H
C
A
L
F
A
I
L
E
D
a f
e l i
. d
B
:
P
H
C
A
L
F
A
I
L
E
D
b
u
e f f
n i r
e
e l
t c
o r
W
a
s
h
W
A
S
H
I
N
H
I
B
I
T
E
D
F
u
n
t c
o i
A
:
O
U
T
O
F
S
A
M
P
L
E
A
:
B
R
O
K
E
N
C
A
B
L
E
1
T
h
e
n i
a s
a (
e t l
n r
a
n i t
g
d
s i
p
a l
) y
2
B
:
O
U
T
O
F
S
A
M
P
L
E
T
h
e
B
:
B
R
O
K
E
N
C
A
B
L
E
n i
i d
a (
e t l
n r
a
n i t
g
d
s i
p
a l
) y
A
:
B
R
O
K
E
N
C
A
B
L
E
T
h
e
a c
B
:
B
R
O
K
E
N
C
A
B
L
E
n i
i d
a c
1
A
:
L
O
W
G
L
A
S
S
I
M
P
.
T
h
e
A
:
B
R
O
K
E
N
C
A
B
L
E
e s
s n
2
T
h
e
a (
e t l
n r
a
n i t
g
d
s i
p
a l
) y
B
:
L
O
W
G
L
A
S
S
I
M
P
.
n i
i d
3
B
:
B
R
O
K
E
N
C
A
B
L
E
T
h
e
e s
s n
a (
e t l
n r
a
n i t
g
d
s i
p
a l
) y
T
h
e
e r
A
:
C
H
E
C
K
R
E
F
.
e s
s n
r o
B
:
C
H
E
C
K
R
E
F
.
e s
s n
r o
Table 8.1 Error Messages
8.2 Calibration Fail Message or
no Response to pH/Redox Changes
The majority of problems are associated with the electrodes and
cabling. Replace the electrodes as an initial check – refer to the
appropriate instruction manual. It is also important that all
program parameters have been entered correctly and have not
been altered inadvertently – see Section 7.
If the above checks do not resolve the fault:
a) Check that the analyzer responds to a millivolt input.
Connect a pH simulator, such as Model 2410, to the
transmitter input; +ve to glass and –ve to reference – see
Section 6.4 or 6.5. Select the
set the
to
Probe Type
Redox
displays the correct values as set on the simulator.
62
e l
C
a
u
s
e
a r
u t
e r
c
o
m
p
e
n
a s
o t
/ r
s a
o s
c
a i
e t
d
o i t
n
f s
r o
S
e
s n
r o
A
a
e r
e
h t i
r e
o
r o
h s
o
t r
c
c r i
u
. t i
a r
u t
e r
c
o
m
p
e
n
a s
o t
/ r
s a
o s
c
a i
e t
d
o i t
n
f s
r o
S
e
s n
r o
B
a
e r
e
h t i
r e
o
r o
h s
o
t r
c
c r i
u
. t i
g
h
h t
e
a c
b i l
a r
o i t
n
h
s a
n
t o
a f
e l i
, d
d
e
p
r i a
s a
o s
c
a i
e t
d
w
h t i
h t
e
e s
s n
e t
d
s i
b
c e
o
m
n i
g
a f
g i t
u
e
d
a
n
d
m
e
t n
s i
r
c e
o
m
m
e
n
d
e
. d
b i l
a r
o i t
n
f o
h t
e
e s
s n
r o
n i
i d
a c
e t
d
C
h
e
k c
b
f f u
r e
a v
u l
s e
a
n
d
e r
p
e
t a
. g
f I
h t
e
a f
t l u
p
e
s r
t s i
, s
e r
p
a l
e c
d
e
. s
s i
s
t e
o t
.
S
t e
F
u
n
t c
o i
n
O
f f
W
a
s
h
o t
–
s
e e
S
c e
o i t
n
. 2
. 3
. 3
n
O
n
e s
s n
r o
n i
i d
a c
e t
d
s i
n
t o
u f
y l l
m i
m
m
p
. e l
a c
b
e l
s a
o s
c
a i
e t
d
w
h t i
h t
e
e s
s n
a c
e t
d
m
y a
b
e
d
a
m
a
g
e
. d
b
e l
s a
o s
c
a i
e t
d
w
h t i
h t
e
e s
s n
r o
e t
d
m
y a
b
e
d
a
m
a
g
e
. d
g
a l
s s
e
e l
t c
o r
d
e
s a
o s
c
a i
e t
d
w
h t i
r o
n i
i d
a c
e t
d
m
y a
b
e
b
o r
e k
. n
a c
b
e l
s a
o s
c
a i
e t
d
w
h t i
h t
e
e s
s n
a c
e t
d
m
y a
b
e
d
a
m
a
g
e
. d
c
o
n
n
c e
o i t
s n
s a
o s
c
a i
e t
d
w
h t i
h t
r o
n i
i d
a c
e t
d
m
y a
b
e
a f
l u
. y t
e f
e r
n
e c
e
e l
t c
o r
d
e
s a
o s
c
a i
e t
d
w
n i
i d
a c
e t
d
m
y a
n
e e
d
l c
a e
n
n i
g
r o
m
y a
n
e e
d
e r
l p
c a
n i
. g
page and
CONFIG. SENSORS
or
. Check that the analyzer
ORP
Note. A normal laboratory mV source is not
suitable for use as a pH simulator.
Failure to respond to the input indicates a fault with the analyzer
which must be returned to the Company for repair. Correct
response, but with incorrect readings, usually indicates a
calibration problem. Recalibrate the analyzer as detailed in
Section 7.
p
e
n
b) Use the pH simulator to carry out an impedance check on
the analyzer, i.e. glass to reference, glass to earth and
reference to earth – refer to simulator manual.
p
e
n
If the analyzer fails this test, check for moisture within the
transmitter and in particular the terminal compartment. It is vital
h t
e
that all evidence of moisture is removed with the use of a hot air
r o
drier.
c) Reconnect the electrode cable and connect the simulator to
h
s a
the electrode end of the cable. Repeat the procedures a) and
b) above. If the analyzer fails test b), check for moisture
h t
e
around the connections and check that the insulation on the
inner co-axial conductor is clean and that the graphite layer
has been removed.
r e
e s
d
8.3 Checking the Temperature Input
Check the analyzer responds to a temperature input.
r o
Disconnect the Pt100/Pt1000/Balco 3K leads and connect a
suitable resistance box directly to the analyzer inputs – see
Section 6.4 (wall-/pipe-mount analyzer) or Section 6.5
(panel-mount analyzer). Check the analyzer displays the correct
values as set on the resistance box – see Table 8.2.
h t
e
Incorrect readings usually indicate an electrical calibration
problem. Re-calibrate the analyzer as detailed in Section 7.
r o
T
e
m
p
e
a r
u t
e r
e
F
º
C
0
3
2
h t i
h t
e
h t
e
1
0
5
0
2
0
6
8
2
5
7
7
3
0
8
6
4
0
1
0
4
5
0
1
2
2
6
0
1
4
0
7
0
1
5
8
8
0
1
7
6
9
0
1
9
4
1
0
0
2
1
2
1
3
0
2
6
6
Table 8.2 Temperature Readings for Resistance Inputs
)
n I
p
t u
R
e
s
s i
a t
n
c
e
(
P
1 t
0
0
P
1 t
0
0
0
1
0
0
1
0
0
0
1
0
3
1
0
3
9
1
0
7
1
0
7
7
1
0
9
1
0
9
7
1
1
1
1
1
1
6
1
1
5
1
1
5
5
1
1
9
1
1
9
4
1
2
3
1
2
3
2
1
2
7
1
2
7
0
1
3
0
1
3
0
8
1
3
4
1
3
4
7
1
3
8
1
3
8
5
1
5
0
1
5
0
0
B
a
c l
o
3
K
2
6
2
5
2
7
7
5
2
9
2
5
3
0
0
0
3
0
7
5
3
2
2
5
3
3
7
5
3
5
2
5
3
6
7
5
3
8
2
5
3
9
7
5
4
1
2
5
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