Ransburg MMA-303 Direct_Ind Test Stand - Manual (Page 16)

Ransburg MMA-303 Test Station - Installation
13
13. If no leak is found, turn the “Fluid” switch to
“Air”. Open the Dump to purge out the water.
14. When all water has been evacuated, close
the dump, turn off all switches and turn the “Fluid”
to “Off”.
Air Test
1. Turn the “Fluid” switch to “Air” then “Off” to
pressurize the system.
2. Observe the leak test gauge. The pressure
must not drop more than 2 psi in 10 seconds.
3. Open the “Dump” to de-pressurize the system
and turn off all of the trigger valves. Switch the
“Dump” to “Off”
4. Turn the “Fluid Air” regulator to 0 psig. Open
the manual relief valve on the pressure pot. Turn
all switches off. Ensure “Fluid Enable” switches
are all off.
TURBINE TEST
The purpose of this test is to verify the applica-
tor rotates properly and sprays reasonably well.
With de-ionized or distilled water as the test fluid
it is difficult to accurately assess the spray per-
formance characteristics. However, it can give a
relative indication of how well the bell will spray
in production.
N O T E
† Bell cup and shroud must be attached
to end of turbine.
Bearing Air/Drive Air Test
This test is to verify the applicator responds to
changes in set points in the speed selector.
1. Raise the safety spin guard and lock it in place
with the pin.
2. Adjust the air regulator for bearing air to 90
psig minimum.
3. The turbine shaft must rotate freely with bear-
ing air supplied.
4. Set the atomizer speed select to 30,000 rpm.
5. Toggle Enable 1 “on” or in the “up” position on
the Atomizer Speed Select card. Then press the
“Speed Enter” button. The turbine should now
begin spinning. This should be audible.
6. Adjust the speed select to 50,000 rpm. Press
the “Speed Enter” button to enter the new speed.
An audible difference in speed should be de-
tected. Adjust the speed again to 70,000 rpm
and press “Speed Enter” to enter the new speed.
7. Observe the Atomizing Air gauge. At 70,000
rpm the air consumption should not exceed 17.0
SCFM.
Fiber Optic Transceiver Test
1. While the turbine is spinning observe the “Fiber
Optic Transceiver Voltage” display. The voltage
must be greater than .75mV.
2. If the voltage is out of range, there are several
possible causes. The most likely are:
a. Transmitter inside the bell is bad or is po-
sitioned incorrectly. Refer to the MMA-303
service manual for instructions to correct the
problem.
b.Transmitter (75911) or cable (SMC-424-XX)
is not properly connected or may be broken.
LN-9255-06.2