4. Use included screws and washers to x pump to mounting frame.
6.16 Pressure gauge connectivity and automatic eco-mode
A Leybold active Pirani gauge, e.g. TTR 91, TTR 91 N, TTR 91 R, TTR 101,
TTR 911 N, or compatible can be connected to the connector labelled X101
on the back of the pump. Please use a screened Type A connecting cable
from the Leybold catalogue. Using a suitable T-piece the pressure gauge
can be connected to the ECODRY plus inlet. The measured inlet pressure
can be monitored using the software tool LEYASSIST or can be used to
enable automatic speed control of the ECODRY plus based on the actual
pressure for power consumption and noise reduction.
When a pressure gauge is detected, automatic eco-mode is automatically
activated in the default conguration. In this mode the ECODRY plus runs
with full speed for initial pumpdown of the system. Once the target ultimate
pressure is reached and for example the turbomolecular pump has reached
full speed resulting in a lower and stable gasload, the ECODRY plus is
reducing automatically the rotation speed to the congured standby speed
running with lower power consumption and lower noise. Only, if additional
gas load is created and the inlet pressure is increased above the congured
threshold pressure, full speed is activated again.
The corresponding threshold values can be congured using the LEYASSIST
software tool on a connected PC. LEYASSIST can be also used to monitor
the measured inlet pressure during the process and to deactivate this
operation mode.
Default parameters:
Lower Standby
Pressure Setpoint
When the pump is started at high pressure it’s
running at full speed. When the measured
pressure is falling below this setpoint, the speed is
reduced from full speed to standby speed.
0.1 mbar
Upper Standby
Pressure Setpoint
When the pressure is exceeding this value the
speed is switched back to full speed again.
0.5 mbar
LEYASSIST can be downloaded free of charge from the Leybold website
under www.leybold.com > Downloads > Download Software > Software for
ECODRY plus. A PC connection cable connected to the front USB
300902516_002 - 10/2020 - © Leybold
46
Operation
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