![YOKOGAWA FLXA21 User Manual Download Page 45](http://html.mh-extra.com/html/yokogawa/flxa21/flxa21_user-manual_911262045.webp)
<6. Function block parameters and Methods>
6-19
IM 12A01A02-72E
3rd Edition : Oct. 01, 2015-00
Table 6.7 DEVICE_STATUS_5 (FLXA21-PH: Sensor Warning)
Error
Description and Remedy
NAMUR
NE107
category
DIAGNOSIS
(Classic)
DIAGNOSIS
(Condensed)
DIAGNOSIS
EXTENSION
pH too high
pH reading above the higher limit.
Check connections and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
pH too low
pH reading below the lower limit.
Check connection and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
Temperature too high Measured process temperature
exceeds the lower limit.
Check process temperature.
Check programmed sensor type.
Check connections and cable.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
Temperature too low Measured process temperature
exceeds the upper limit.
Check process temperature.
Check programmed sensor type.
Check connections and cable.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
Temp. comp.
error(pH)
Uncompensated value outside
matrix limits.
Check pH temp. compensation
configuration.
S
Failure in
measurement
Invalid
process
condition
Measurement
out of
Specification
ORP too high
ORP reading above 1500mV.
Check connections and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
ORP too low
ORP reading below -1500mV.
Check connections and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
rH too high
rH reading above 100rH.
Check connections and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
rH too low
rH reading below 0rH.
Check connections and cable.
Replace sensor.
S
Failure in
measurement
Invalid
process
condition
Sensor
Warning for
Measurement
Impedance 1 too
high
Sensor fouled. Liquid earth
disconnected. Sensor not
immersed. Insufficient electrolyte.
Clean or replace sensor. Check
sensor immersion. Check
electrolyte tank.
M
Failure in
measurement
Maintenance
demanded
Sensor
Warning for
Wellness
Impedance 1 too low Sensor broken. Damaged or
damp connections.
Check impedance settings.
Replace sensor.
M
Failure in
measurement
Maintenance
demanded
Sensor
Warning for
Wellness
Impedance 2 too
high
Sensor fouled. Liquid earth
disconnected. Sensor not
immersed. Insufficient electrolyte.
Clean or replace sensor. Check
sensor immersion. Check
electrolyte tank.
M
Failure in
measurement
Maintenance
demanded
Sensor
Warning for
Wellness
Impedance 2 too low Sensor broken. Damaged or
damp connections.
Check impedance settings.
Replace sensor.
M
Failure in
measurement
Maintenance
demanded
Sensor
Warning for
Wellness
SENCOM initializing SENCOM is being initialized.
Please wait.
C
—
Function
check
Warming up
SENCOM Logbook
(almost) full
Calibration logbook is more than
95% full.
Erase logbooks. Turn logbook
"full" warning off.
M
Maintenance
required
Maintenance
required
Warning for
Logbook
SENCOM sensor
changed
SENCOM sensor changed.
Go to "New sensor?" on the
display of FLXA21. Reset
wellness data by selecting 'Yes' or
only cancel warning by selecting
'No'.
—
—
—
—