Malvern MPT-2, User Manual, Page: 53 / 85

MPT-2 & Degasser Page 4-1
4
Vacuum Degasser
- Operational guide
Degasser specific Health and safety
Warning!
Use appropriate care when handling flammable solvents. Make sure that
there are no leaks in the titrant lines - refer to
General Operation - Ini-
tial pump-down
. Ensure that hazardous exhaust gases are properly
vented.
General Operation
Powering up the Vacuum degasser
With the Vacuum degasser plumbed into the system and the power lead installed,
as described in the, turn on the rear panel power switch. The green Power LED
should illuminate.
Immediately upon turning on the instrument, the microprocessor examines the
vacuum sensor signal to confirm that it is within an expected range. Following the
start-up test, the microprocessor ramps the vacuum pump to high RPM, to quickly
exhaust atmosphere from the vacuum chamber. As the vacuum level approaches
the preset control value, the pump RPM will slowly ramp down to a low speed
(typically 40 to 60 RPM) and will vary slightly as needed under the changing degas-
sing load to maintain a virtually constant vacuum level.
Initial pump-down
During initial pump-down, the yellow Status LED will be lit. Once the vacuum has
reached normal operating level, the yellow LED will extinguish and the green vac-
uum LED will illuminate. As well as checking the front panel LEDs, the running of
the vacuum pump can be checked by placing a hand onto the instrument and
checking for vibration
Start the titrant flow through the system and check for leaks around the connectors.
MAN0318-4.0 - MPT-2 Autotitrator-Degasser.book Page 1 Tuesday, September 4, 2012 12:15 PM