Ransburg DynaFlow User Manual - Manual (Page 44)

LN-9400-00.9
- Open-Loop or Manual Calibration Mode
This mode attempts to flow material at the highest
flow rate possible by setting the output to the E/P
transducer at the MVR HIGH parameter, located
in the JOB table, for the selected CHANNEL. No
less than 200 cc of material should be dispensed
during calibration. Otherwise, the error in cali-
bration will be too large. With 200 cc of material
dispensed into a beaker, the error in calibration
will be limited to+/- 0.5%, since the measured
volume can be determined to only the nearest cc.
The operator must open and close the calibration
valve, or supply a GUN TRIGGER. The material
volume is entered by the operator and a new
Pulses/Liter is calculated.
- Closed-Loop or Automatic Calibration Mode
This mode sets the flow rate set point for the se-
lected CHANNEL based on the Total Flow Rate
and Ratio for the selected GUN, as stored in the
JOB, since calibration should always be performed
at the normal flow rate for the CHANNEL. The
Calibration Time is also set based on the flow rate
so that no less than 200 cc of material will be dis-
pensed during calibration. Otherwise, the error in
calibration will be too large. With 200 cc of material
dispensed into a beaker, the error in calibration will
be limited to +/- 0.5%, since the measured volume
can be determined to only the nearest cc. The
operator may override both the Calibration Time
and Calibration Set Point, if desired. The opera-
tor must open and close the calibration valve, or
supply a GUN TRIGGER. The material volume
that passed through the GUN is recorded. The
measured volume is entered by the operator and
a new Pulses/Liter value is calculated.
Automatic calibration mode may not be selected
for the Master channel of a Manual Gun since it
normally has no MVR to control flow rate.
Calibration Time
Sets the time duration for calibration.
Flow Rate Set Point
Sets to actual flow rate during calibration. This
value is based on the Current Pulses/Liter pa-
rameter, so it will be inaccurate if that parameter
is inaccurate.
Actual Flow Rate
Displays the actual flow rate during calibration.
This value is based on the Current Pulses/Liter
parameter, so it will be inaccurate if that parameter
is inaccurate.
Number of Pulses
Displays the actual number of pulses received
from the flow meter during calibration.
Calculated Volume
Displays the calculated volume of material that
should be in the beaker when the calibration
is stopped. This value is based on the Current
Pulses/Liter parameter and the Number of Pulses
received, so it will be inaccurate if the Current
Pulses/Liter parameter is inaccurate.
Measured Volume
The measured volume (cc’s) of material in the
calibration beaker. This value is entered by the
operator. Once a non-zero value is entered, the
operator may not enter a Measured Weight and
Specific Gravity.
Measured Weight
The measured weight of material (grams) in the
calibration beaker (less the tare weight of the
beaker). This value is entered by the operator.
The scales used should be accurate to 0.10 gram.
This value is entered by the operator. The Mea-
sured Weight, along with the Specific Gravity, is
used to calculated the Measured Volume. Once
a non-zero value is entered, the operator may not
enter a Measured Volume.
Specific Gravity
Specific gravity is the ratio of a material’s density
to the density of water. This can be obtained from
the material safety data sheet (MSDS), or directly
from the material supplier. This value is entered
by the operator. The Specific Gravity, along with
the Measured Weight, is used to calculated the
Measured Volume. Once a non-zero value is
entered, the operator may not enter a Measured
Volume.
DynaFlow TM User Manual - Operation
40