Alicat VC Series Volumetric Flow Controller - Manual (Page 43)

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Option: Totalizing Mode
16 Series Flow Meters and Controllers can be purchased with the Totalizing Mode option. This option
adds an additional mode screen that displays the total flow (normally in the units of the main flow
screen) that has passed through the meter or controller since the last time the totalizer was cleared.
The Totalizing Mode screen shown below is accessed by pushing the “MODE” button until the label
over it reads “Total”. If your meter or controller is ordered with Totalizing Mode option, pushing the
“Mode” button once will bring up the “Totalizing Mode” display. Pushing “Mode” a second time will bring
up the “Select Menu” display. Pushing it a third time will return you to the Main Mode Sreen.
Hours Mass Clear
0.3 0.00
Mass
SLtr
Air
+0.0 SCCM
Total
Counter – The counter can have as many as six digits. At the time of order, the customer must specify
the resolution of the count. This directly affects the maximum count. For instance, if a resolution of
1/100ths of a liter is specified on a meter which is totalizing in liters, the maximum count would be
9999.99 liters. If the same unit were specified with a 1 liter resolution, the maximum count would be
999999 liters.
Rollover – The customer can also specify at the time of order what the totalizer is to do when the
maximum count is reached. The following options may be specified:
No Rollover – When the counter reaches the maximum count it stops counting until the counter is
cleared.
Rollover – When the counter reaches the maximum count it automatically rolls over to zero and continues
counting until the counter is cleared.
Rollover with Notification – When the counter reaches the maximum count it automatically rolls over to
zero, displays an overflow error, and continues counting until the counter is cleared.
Hours.–.The display will show elapsed time since the last reset in 0.1 hour increments. The maximum
measurable elapsed time is 6553.5 hours (about nine months). The hours count resets when the “clear”
button is pushed, an RS-232 clear is executed or on loss of power
Clear – The counter can be reset to zero at any time by pushing the dynamically labeled “Clear” button
located above the upper right corner of the display. To clear the counter via RS-232, establish serial
communication with the meter or controller as described in the RS-232 section of the manual. To reset
the counter, enter the following commands:
In Streaming Mode: $$T
In Polling (addressable) Mode: Address$$T (e.g. B$$T )