Commands and Tips for Third-Party Devices
Varian CP-3800 GC: Troubleshooting

Problem:

The gas chromatograph does not start after reconfiguration has been performed in the Ethernet setup. This may be due to errors in the Ethernet configuration.

Solution:

Follow the steps below:

1. Uninstall the network card. Please note that the network card is located behind the EPROM card. Therefore, uninstall the EPROM card first.

2. Reinstall the EPROM card.

3. Start the gas chromatograph.

4. Reconfigure the gas chromatograph as follows:

• Set BOOTP to No.

• Enter the associated network address in the Network Address field. Verify that no other PC or device is already using this address.

• In addition, make sure that the subnet mask is identical to the subnet mask of the PC and that the gateway addresses and the IP addresses of the gas chromatograph and the PC are identical as well.

5. Restart the instrument via Save+Exit (without the network card) to check whether the instrument accepted the changes.

6. Turn the instrument off.

7. Reinstall the network card.

8. Reconnect and restart the instrument.

Problem:

It looks as if changes to different parameters, such as ConstFlowMode, ConstFlow, and Pulse are not transmitted to the instrument.

Solution:

The method that is displayed on the instrument is not the method that is actually used. Set Active Method on the instrument to display the currently used method.

 Tip:

In addition, set Edit Method to Method 8. This ensures that Method 8, which is used by Chromeleon, is displayed in any case.