Code 17x: How To Set Up the MFC
Chapter Seven: Operation in Setup Mode
244
1. Repeatedly press the [
DISPLAY MODE
] key until the 146 unit is in Setup Mode.
The system responds by scrolling through modes.
2. Use the arrow keys to scroll to the
CODE
legend.
The system responds by causing the left display to blink.
3. Enter the number 17x (where x represents an MFC channel number), and press the
[
ENTER
] key.
The system responds by displaying the appropriate parameters for code 17x, and causing
the main display to blink.
4. Enter the set point flow rate (the range is ± 10% of the MFC range) if using Set Point or
Totaling mode, or enter the ratio set point percent (0 to 200%) if using Ratio mode.
A. If the display is correct, press the [
ENTER
] key.
B. If the display is not correct, enter the correct set point, then press the [
ENTER
] key.
The system responds by accepting the set point value and causing the right display to
blink.
5. Use the arrow keys to scroll through the modes of operation ( SP for Set Point, to for
Totaling, and rA for Ratio)
A. If the display is correct, press the [
ENTER
] key.
B. If the display is not correct, press an arrow key and then press the [
ENTER
] key.
If Set Point (SP) is selected, no more input is required for code 17x. When the selected
MFC is controlling, it controls according to the new set point.
If Totaling (to) is selected, the system responds by displaying a blinking channel number
in the center display.
If Ratio (rA) is selected, no additional input is required. The MFC will control to a flow
rate equal to the PID output signal times the ratio selected the main display.
6. If Totaling mode (to) was selected, enter the channel number for the co-channel (it must
be an MFC).
A. If the display is correct, press the [
ENTER
] key.
B. If the display is not correct, enter the correct co-channel number, and press the
[
ENTER
] key.
The system responds by accepting the co-channel number. When the totaling MFC
is controlling, its output voltage is adjusted in order to accommodate the output of
the co-channel MFC, and to control with a total flow rate equal to the user-defined
set point.
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