Alicat MC Series Mass Flow Controller User Manual

Page 43

Opti on: Totalizing Mode - Controllers

Controllers can be purchased with the Totalizing Mode opti on. This opti on adds

an additi onal mode screen that displays the total fl ow (normally in the units of

the main fl ow screen) that has passed through the device since the last ti me the

totalizer was cleared. The Totalizing Mode screen is accessed by pushing the

TOTAL butt on on the MAIN display.

TOTAL/TIMER: Pushing the TOTAL/TIMER butt on

will cycle the large numbers on the display

between total mass and ti me elapsed.
Rollover – The customer can also specify at the

ti me of order what the totalizer is to do when

the maximum count is reached. The following

opti ons may be specifi ed:
No Rollover – When the counter reaches the

maximum count it stops counti ng unti l the

counter is cleared.
Rollover – When the counter reaches the

maximum count it automati cally rolls over to

zero and conti nues counti ng unti l the counter is cleared.
Rollover with Noti fi cati on – When the counter reaches the maximum count

it automati cally rolls over to zero, displays an overfl ow error, and conti nues

counti ng unti l the counter is cleared.

TOTAL MASS: The counter can have as many as seven digits. At the ti me of order,

the customer must specify the range. This directly aff ects the maximum count. For

instance, if a range of 1/100ths of a liter is specifi ed on a meter which is totalizing in

liters, the maximum count would be 99999.99 liters. If the same unit were specifi ed

with a 1 liter range, the maximum count would be 9999999 liters.
ELAPSED TIME: The small numbers below the mass total show the elapsed ti me

since the last reset in hours, minutes and seconds. The maximum measurable

elapsed ti me is 9999 hours 59 minutes 59 seconds. The hours count resets when

RESET is pushed, an RS-232 or RS-485 clear is executed or on loss of power. Press

ELAPSED TIME to show this as the primary display.
SETPT: Pushing SETPT will allow you to change the controller's set-point.
RESET – The counter can be reset to zero at any ti me by pushing the RESET

butt on. To clear the counter via RS-232 or RS-485, establish serial communicati on

with the meter or controller as described in the RS-232 or RS-485 secti on of the

manual. To reset the counter, enter the following commands:

In Polling (addressable) Mode: Address$$T (e.g. B$$T )

SETPT

+123.4

SCCM

+123.4

TOTAL/

TIMER

BATCH

RESET

0000:09:59 SCC

00123.45

00123.45 Batch Done

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