CPS BlackMax MD100HE Kullanıcı El Kitabı - Sayfa 8
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Sayfayı YazdırSETTING TO ZERO PRESSURE
1. It is recommended the manifold be opened to
the atmosphere before every working session.
If display reads other than zero in the selected
pressure units, zero can be re-set by pressing
[CLRJ
and holding
[FIG.
Zero Screen
return user to Main Screen
both Pressure Displays should now read zero.
This operation should be performed especially
if manifold has been dropped or pressurized
beyond 800 PSIG (55 bar) full scale.
PRESSURE HOLD OR VACUUM HOLD TESTING
The BLACKMAX MD100 and MD50 series manifold can perform
Vacuum Hold tests. Test pressures and durations are fully settable by the user. Any
test can be aborted at any time by pressing
PRESSURE HOLD TEST
A pressure hold test should be used to determine if a
if no leak or small leaks exist). Electronic Leak Detectors are the only instrument to
determine leak rates less than 1 oz./year. In practice there should be no pressure hold
detected if the system is deemed leak proof enough to add refrigerant. Large leaks
should be found before adding refrigerant. Low cost tracer gas mixtures such as 95%
N2 and 5% H2 are popular and can be sensed by a CPS E_MOS leak detector.
Main Screen [FIG .1
1. At
[FIG.SJ. [Note:
at this time].
2. Press [SET] to advance to Test Time (Pressure) Set Screen
◄-:
APO
I iii
CCJC
Test Pressure Set Screen
8
at main screen. The Pressure
7] appears and will then
[FIG.1],
where
[TEST].
J press
MDXVG
The
Vacuum Gauge accessory
n ;
rrc
SH:
◄-:
n
rr
2Er0
Pressure Zero Screen
[CLRJ.
large
leak exists (not to determine
Test Pressure Set
The
should not be plugged in
◄-
■:
APO
n 5 . n n
U lJU
hh:mm
Test Time Pressure Set Screen
APO
,r n
ecru
Pressure
Hold and
Screen will appear
[FIG.9].
Adjust Test
Duration In 5
Minute Increments