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CORN I NG ASCENT FBR PD SYSTEM
Figure 7-15.
Probe Calibration.
7.8 Equipment Control Faceplates
Process controls for mass flow controllers, pinch valves, and pumps can be manually manipulated by accessing the faceplates. The listed
steps below describe how to change setpoints on a pump faceplate. The steps correspond with numbers in Figure 7-16.
1. Select the pump icon.
2. The pump faceplate will pop-up.
3. On the pump faceplate, press Program/Operator.
4. The pump mode pop-up faceplate will open.
5. On the pump mode faceplate, press the Operator icon.
6. A white flag will appear next to the pump.
7. The setpoint field on the pump faceplate will turn white. This is an active field. In Operator Mode, the pump setpoints are entered in
mL/min.
8. The pump controls will become active to allow control.
9. Once setpoint is changed, press the Program icon to put the pump back under program control.
NOTE 1:
If the stop square is not selected after selecting the continuous run arrow, when the pump is returned to Program mode, the
pump will either stay at the operator-selected run speed or revert to the active phase-controlled Program setpoint.
NOTE 2:
If the user returns to program mode and the loop controlling the pump is still active (e.g., base pump controlled by pH loop), the
setpoint will revert to the program mode setpoint.
Likewise, in-line sensor probes can be calibrated via Probe Calibration (Figure 7-15). DO and pH probe values are bar coded into the
system. The user either verifies the bar coded values or manually enters values from the data sheet during Media Conditioning (see
Section 8.2.3.1. Temperature offsets can be determined offline in manual operation on a non-sterile system Defaults were determined
in a 22°C ambient condition with MCV and FBR temperatures at 38°C and 37°C, respectively. Large deviations from these conditions may
require the user to recalibrate under targeted use conditions.
Set Span is used when the user inputs a new desired span to calculate and apply the new correction factor. This function allows users to
set the sensor span which adjusts the slope of the MCV DO and FBR DO inputs, and apply an offset to the MCV pH input.
Use Raw removes the reference value from the selected parameter and uses the raw, uncompensated value from the input (can be seen
under the Raw Value label for the DO and pH inputs.
Value in Use displays the raw or referenced input value currently in use by the system for the DO and pH values.
NOTE:
If the entered span and calculated correction factor changes the raw DO value by ± 25% or more, or the raw pH value by ± 1 pH or
more, the system will notify the user, and the span must be changed to a value that corrects the raw value by less than the specified limit
to continue. This system check indicates when a sensor is behaving outside the normal range of variability.