Graco PRECISION MIX 949-999 Manual page 17

Proportioning controller
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Setup Screens (Continued)
Minimum Flow Rate Limit
MINIMUM FLOW
LIMIT IS XXXX cc/M
NEW VALUE? XXXX
NO
QUIT
Press NO
Maximum Flow Rate Limit
MAXIMUM FLOW
LIMIT IS XXXX cc/M
NEW VALUE? XXXX
NO
QUIT
Press NO
Minimum and Maximum Flow Rate Limit
MIN-MAX FLOW LIMIT
STOPS SYSTEM
CHANGE?
NO
YES
QUIT
MIN-MAX FLOW LIMIT
SYSTEM CONTINUES
CHANGE?
NO
YES
QUIT
Press NO
684-015
Pendant Screens
or
With this screen, you set the minimum allowable flow
rate of the Precision Mix™.
calculated by measuring the total time of a cycle. If the
flow rate drops below the allowable setting, an alarm will
activate. If you do not want to use this feature, set the
value to 0000 cc/M. To enter a new value, key in a
number and press ENTER. The value can be set from 0
to 9999 cubic centimeters per minute. It will display on
line two.
NOTE:
The MINIMUM FLOW LIMIT letting uses the
information from the flow rate display and will not
activate the alarm if the spray device is turned off or the
flow rate drops below the setting for less than two flow
rate checks.
With this screen, you set the maximum allowable flow
rate of the Precision Mix™.
calculated by measuring the total time of a cycle. If the
flow rate exceeds the allowable setting, an alarm will
activate. If you do not want to use this feature, set the
value to 9999 cc/M. To enter a new value, key in a
number and press ENTER. The value can be set from 0
to 9999 cubic centimeters per minute. It will display on
line two.
(The standard Precision Mix™ is rated for
2000 cc/minute maximum fluid flow).
NOTE: The MAXIMUM FLOW LIMIT setting uses the
information from the flow rate display and will not
activate the alarm if the spray device is turned off or the
flow rate exceeds the setting for less than two flow rate
checks.
These screens allow you to either have the minimum or
maximum flow limit alarm stop the system or continue
operating.
This alarm occurs when the flow rate
exceeds the limits set by the MIN-MAX FLOW LIMIT
entries. In either case, the alarm light on the pendant
blinks, the alarm annunciator output goes on, and the
relevant alarm message is displayed on the pendant.
When the MIN-MAX FLOW LIMIT is reset by returning
within the limits set, the alarm light will go out, the alarm
output will go off, and the display will return to the
Target/Actual screen (on page 11).
Minimum flow rate is
Maximum flow rate is
17

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