Figure 13 Turbo Setpoint Screen - Edwards T-Station 300 Instruction Manual

When the turbo setpoint screen is selected, the TSP LED is lit and the current setpoint is
displayed. The default is "OFF". The turbo setpoint menu is not available if the turbo
pump is running or the selected units are volts.
1. To change the turbo setpoint press the ENTER key, then use the NEXT key to
choose between off, time delay and pressure setpoint.
2. Press the ENTER key again to confirm the selection.
3. When time delay is selected the display will show the delay time in seconds. The
default time is 120 seconds. This means that the turbo pump will start after a delay
of 120 seconds from when the START key is pressed. To change the value of the
delay time press and hold the ENTER key to start number entry mode.
4. If an active gauge is connected to the system the pressure setpoint can be used to
start the turbo pump once the pressure has fallen below the setpoint value. When
pressure is selected the display shows the setpoint pressure. The default pressure
is 5.00 mbar shown as an exponential. To change the pressure setpoint, press and
hold the ENTER key to start number entry mode.
Note:
If the turbo setpoint is set to pressure but a gauge is not connected the turbo pump will
not start.

Figure 13 Turbo setpoint screen

Number entry mode
When the ENTER key is pressed and held on either the time or pressure option, number
entry mode is entered. The first digit starts flashing and the time or pressure can be
edited.
1. Press the NEXT key to adjust the value, then press the ENTER key to confirm the
digit and then move on to the second digit, which is adjusted similarly. The ENTER
key confirms the digit and then moves to the final digit of the time setpoint or the
exponent of the pressure setpoint. The exponent of the pressure setpoint is
adjusted as a single value in the range - 10 to + 6.
2. The final press of ENTER confirms the complete number and returns to showing
the setpoint value. The TSP is set after the complete number is entered.
D39595880_A
D39595880_A - Operation
Page 30 10/2020 - ©Edwards Limited