ISOLOK MSA Sampler 11
Air Supply Pressure
The sampler is designed to operate best at a regulated pressure of 40 psi (275 KPa) . The regulator inside the controller
has been factory set to provide 40 psi to the sampler and should not require field adjustment . However, if problems
occur and are attributable to variation in the air pressure to the sampler, regulated pressure can be checked and
readjusted as follows:
1.
Remove the 1/8 in plug from the side of the regulator body . Install an accurate pressure gauge on this port .
2.
With the air supply ON and sampler cycling every 2 seconds, the gauge should read 40 psi between cycles .
3.
If the gauge does NOT read 40 psi, open the controller enclosure and readjust as follows:
a.
Pull the adjusting knob upward to release the setting .
b.
Turn the knob while the sampler is cycling until the gauge reads 40 psi between cycles . Clockwise [+] rotation
increases, and counter-clockwise [-] rotation decreases the system pressure .
c.
Push the adjusting knob downward to lock the pressure setting .
d.
Turn the sampler controller OFF and disconnect the electrical power supply . Shut off the air supply . Remove
the gauge, replace the plug and close the controller cover .
Inspection
After installation, the sampler periodically should be checked for proper operation and to ensure that any wear is
detected so proper preventive maintenance can be performed . The Maintenance section of this manual describes
recommended procedures fo daily, weekly and other cleaning and maintenance .
Start-up Inspection
With electrical power and compressed air ON, set the dial pointer to approximately 40 percent of the maximum rate
(in the 10 o’clock position) . Remove the sampler from the line . Turn the controller switch to ON for a few seconds and
observe sampler operations .
Each time the sampler cycles, the plunger will extend out of the body approximately 7/8 in” (22 mm), then withdraw .
Each time the plunger moves in or out, you should hear a firm “click” as the piston bottoms at each end . The plunger
dwells inside the sampler body between cycles .
A complete plunger stroke occurs in about 1/5 (0 .2) second . If plunger seals are dry, a sluggish or incomplete stroke
may occur . See the Maintenance section of this manual for service information
Operation
Initial Cleaning
1.
Remove the sampler body .
2.
Using approved sanitary methods, clean the parts that have contact with product (i .e ., plunger rod, front face,
interior and discharge ports of the sampler body) .
3.
Wipe a very thin film of approved dairy lube (white grease, CIP lube or Vaseline) on the four plunger O-ring seals,
plus the rod and piston O-rings .
