Edwards iH Dry Pumping Systems, iH80, iH600, iH1000

5.4.2Change the display units
If required, you can change the Pump Display Terminal display units:
• Pressures shown on the Pump Display Terminal can be displayed in either kPa or psi. Use the
Setup/Units/Pressure menu to change the pressure display units.
• Temperatures shown on the Pump Display Terminal can be displayed in either o Cor o F. Use
the Setup/Units/Temperature menu to change the temperature display units.
• Pressures measured by an optional Active Gauge connected to the iH system, can be shown on
the Pump Display Terminal in either mbar, kPa or Torr. Use the Setup/Units/AG menu to
change the Active Gauge pressure display units.
5.5 Take and release control
To use the Pump Display Terminal to control the operation of the iH system, the Local control
LED on the Pump Display Terminal (Figure 1-8, item 9) must be on. If the LED is not on, use
the Control menu to take control. You cannot take control with the PDT if another module
already has control.
If you need to use another module (for example, the iH Interface Module) to operate the iH
system, the Local control LED on the Pump Display Terminal (Figure 4-1, item 9) must be off.
If the LED is on, use the Control menu to release control.
If you use the Pump Display Terminal to start up the iH system and you then disconnect the
Terminal from the iH for 150 seconds or more, the iH system will automatically assume that
the Pump Display Terminal has released control; you will then have to use one of the
following methods to shut down the iH system:
• Take control with the Pump Display Terminal again, then shut down the iH system as
described in Section 5.10.
• Take control with another module and use that module to shut down the iH system.
• Use the emergency stop switch, as described in Section 5.12.
iH Dry Pumping Systems 5-5