A546–00–880 Issue E
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Installation
Figure 14 - Flow tube (4 slm)
If a different nitrogen flow rate is required please contact Edwards for further advice.
8. After commissioning the iGX system:
Refer to Section 4.1, step 4 for continued operation the iGX system.
Otherwise, shut-down the system: refer to Section 4.3.
3.13 Install additional safety equipment
If the sensors or microprocessors fail, the total flow rate of nitrogen displayed or output by the iGX system may be
incorrect. If the total flow rate of nitrogen to the dry pump for safety reasons needs to be known, fit suitable
measurement equipment in the nitrogen supply pipeline. If a rotameter is fitted, ensure that it is suitable for use
with nitrogen and that it is correctly calibrated.
If the nitrogen supply to the iGX system fails, a warning message will be shown on the Pump Display Terminal (if
fitted) and will be sent to the Interface Module(s) connected to the iGX system. Ensure that the installation is
configured so that it remains safe if there is a failure of the nitrogen supply to the iGX system.
If an alarm condition is detected (and the iGX system is not configured to ’run til crash’ refer to Section 4.4) the iGX
system will shut down automatically. Ensure that the installation remains safe if the iGX system shuts down
automatically.
If the Process Tool/control system needs to know the total flow rate of nitrogen to the system for
safety reasons, install suitable measurement equipment in the nitrogen supply pipeline.
If using the nitrogen purges to dilute dangerous gases to a safe level, ensure that the system shuts
down if the nitrogen supply to the system fails.
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