Breather Clean

Breather Clean

To unblock the RPV if sample gets into the breather

VAC1 Breather

The blocked breather tube is shown on the diagram above. If the breather becomes slightly or totally blocked with sample, it will affect the viscosity measurements.

Find the external port labelled: VAC BREATHER – there is one for each measuring position.

To unblock:

Step 1 – carry out a user activated clean to ensure that the viscometer is empty.

Step 2 – attach the vacuum supply (from the waste position).

Step 3 – Using Engineer mode – select Breather Clean – or manually energise:

OPEN the AIR valve, then open the S1 valve for 2 seconds – watch to ensure solvent goes through the viscometer and out via the breather tube. Repeat several times.

Step 4 - Repeat step 3 using S2.

Step 5 – With the AIR valve OPEN and Solvent valves CLOSED allow air to be sucked through for 10 minutes to ensure the breather path is completely dry.

Step 6 – visibly inspect the breather tube to make sure it is clear of sample or solvent – all liquid must be removed.

Step 7 – disconnect the vacuum from the breather and re-connect to the waste port.

Step 8 – carry out a final normal clean of the viscometer – using a user activated clean.