34
5 DIAGNOSTICS
The diagnostics screens are designed to provide the user with current data on the performance of
the instrument and information that is useful during the operation, servicing, and maintenance of
the analyser. Under the diagnostic screens, the user is also able to adjust the alarm relay contacts
and mA output signals for verification of terminal operation with an external device such as an
ammeter. The following table summarises the diagnostic options and the location of the screens
for these adjustments:
Screen Name
Screen Function
Notes
Monitor Status
Provides current data on the monitor operation,
including current residual value, cell temperature,
and mA output A and B values, buffered sample
pH
Error/Events Log
This screen provides information on the last 50
events, including calibrations, errors and alarms
that have occurred. Data on the date and time of
the event is included on this screen.
Pressing the
[
Clear
]
button will
erase all events on the screen.
Calibration Status
This screen provides data on the last residual
calibration cycle, including the high and low
residual calibration date, value, and mA
calibration value.
Raw
Measurement
Status
This screen provides data on the raw instrument
electrode, RTD input, pH electrode input and flow
input to the electronics module, along with the
equivalent mA, temperature value and flow value.
Alarm Relay Test
From this screen, the alarm relay activation can
be checked. The User moves through the relay
options, presses the
[
Select
]
key to change the
relay status, and verifies the relay contact closure
with an ohm meter connected to the relay
terminals.
1.The relay configuration is
temporarily overridden when
the user accesses this screen.
All relays will return to
operational status once this
screen is exited.
2. All six relays may be tested
from this screen (note
continuation arrows for
additional options).
Milliamp Test
Under this screen, the User can test and adjust or
trim both of the mA output signals.
Milliamp Output A
Test Data
Under this screen, the user tests mA output A
signal. Data on the current mA value and
equivalent residual set points are displayed on
this screen.
Milliamp Output A
Test Screen
From this screen, the User can increase or
decrease the mA output A signal and verify the
reading with an ammeter connected to the mA
Output A terminals.
The mA output signal is
temporarily overridden when
the user accesses this screen.
The output signal will return to
operational status once this
screen is exited
