ATI
Q46P pH System
Part 6 – Calibration
52
O&M Manual
Rev-F (8/17)
Faults are not stored and are immediately removed if power is cycled. If
the problem causing the faults still exists, however, faults will be
displayed again after power is re-applied and a period of time elapses
during which the diagnostic system re-detects them. The exception to
this rule is the calibration failure. When a calibration fails, no corrupt
data is stored. Therefore, the system continues to function normally on
the data that was present before the calibration was attempted.
After 30 minutes or if power to the transmitter is cycled, the failure for
calibration will be cleared until calibration is attempted again. If the
problem still exists, the calibration failure will re-occur. Press ENTER to
initiate view of the highest priority failure. The display will automatically
return to normal after a few seconds.
PID Timer
This function sets a timer to monitor the amount of time the PID
controller remains at 0% or 100%. This function only appears if the PID
controller is enabled. If the timer is set to 0000, the feature is effectively
disabled. If the timer value is set to any number other zero, a FAIL
condition will occur if the PID controller remains at 0% or 100% for the
timer value. If one of the relays is set to FAIL mode, this failure condition
can be signaled by a changing relay contact.
Press ENTER to initiate user entry mode, and the entire value will flash.
Use the UP arrow key to modify desired value; range of value is 0-9999
seconds. Press ENTER to store the new value.
Sim Out
The Sim Out function allows the user to simulate the pH level of the
instrument in the user selected display range. The user enters a pH
value directly onto the screen, and the output responds as if it were
actually receiving the signal from the sensor. This allows the user to
check the function of attached monitoring equipment during set-up or
troubleshooting. Escaping this screen returns the unit to normal
operation. Press ENTER to initiate the user entry mode, and the right-
most digit of the value will flash. Use arrow keys to modify desired value.
The starting display value will be the last read value of the input. The
output will be under control of the SIM screen until the ESC key is
pressed.
NOTE:
If the HOLD function is engaged before the Sim Output function is
engaged, the simulated output will remain the same even when the
ESC key is pressed. Disengage the HOLD function to return to
normal output.
Glass Diags
This function allows the user to shut off the glass breakage/leak
diagnostics. It does not affect the state of the remaining system
diagnostics. This capability is provided to eliminate nuisance trips in
electrically noisy applications, such as some plating operations. If ON,
Relay B is automatically configured as a fail alarm relay. The relay trips
on any fail condition. Therefore, the normal settings for control Relay B
will disappear from the CONFIG menu since they cannot be used. Note
that the probe timer function can also alter the operation of Relay B. If
the electrode diagnostic function is enabled, that function takes
precedence over the probe timer.
Note also that this function cannot