6
Sentry Equipment Corp
General Description
Read these instructions completely before proceeding to assemble, install or operate this machine . This machine should
be installed, operated and serviced by qualified individuals . All drive guards and doors must be secured in place when
this machine is being operated . Follow proper local, state and federal regulations for proper installation and operational
requirements .
The Sentry® ISOLOK® MSA sampler is designed for sampling sanitary products such as Grade A or industrial grade raw
or processed milk . The ISOLOK MSA sampler can be used in a process line or on the wall of a vessel or reactor . It can
also be installed on road tankers transporting liquid milk . See the Appendix of this manual for information specific to
milk truck applications .
Other applications of this sampler include low volume chemical sampling or biofuel/hydrocarbon sampling .
The sampler is powered by compressed air and operated by an electrical cycle controller that provides adjustable,
time-based sampling rates . The controller circuit has been designed to provide an adjustable time delay before the
sampler begins operation . Delay before the first cycle adjustment range is approximately one-tenth of a second
to 10 seconds . The objective is to allow product trapped in a hose or piping to pass the sampler before operation
begins . During initial delay, the controller solenoid valve is energized, causing the sampler plunger to extend into the
mounting tee, where it can be flushed by product flow .
The ATEX Temperature Class rating is dependent upon process fluid temperature . Reference the following chart:
TX
maximum
temperature
T2
572°F (300°C)
T3
392°F (200°C)
T4
275°F (135°C)
T5
212°F (100°C)
T6
185°F (85°C)
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NOTE
The working pressure of the air cylinder is 120 psig with a max cycle rate of 240 cycles/min on a continuous duty cycle .
Additionally, actuating gas needs to be a non-combustible neutral gas and the working temperature must be between -4
0
F
to 149
0
F (-20
0
C to 65
0
C) .
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NOTE
Figures in this manual may differ from actual purchased equipment . Please refer to the drawings in the appendices of this
document .
The sampler is powered by compressed air and is typically operated by an electrical cycle control that provides an
adjustable time or flow-based sampling rate . Other operating mediums are available .
The sampler normally connects to the sampler controller by two 16-foot lengths of flexible tubing . It mounts onto a
1-1/2 inch Tri-Clamp ferrule that is specially close-coupled to the line, usually by adding a specialized line-mounting
adapter tee into the piping .
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NOTE
Figures in this manual may differ from actual purchased equipment . Please refer to the drawings in the appendices of this
document .
ATEX Ratings:
Ex h IIB T5…T2 Gb
Ex h IIIC T83°C…T300°C Db
-20°C ≤ Ta ≤ +65°C
