Remove a Penetrometer from a Low Pressure Port
- Ensure the low pressure ports have returned to near atmospheric pressure and the Hg Drained indicator on the front analyzer panel is illuminated.
Removing penetrometers when the Hg Drained indicator is not illuminated may allow mercury to spill from the port. See Drain the Low Pressure System. |
- Hold the retaining knob to prevent rotation, then turn the capacitance detector counter-clockwise to loosen and remove it.
- Turn the plastic cap counter-clockwise and remove.
- Turn the retaining knob counter-clockwise, then carefully withdraw the penetrometer assembly. Do not pull on the penetrometer cap.
As the penetrometer is withdrawn, tilt the bulb end down and the stem end up, so mercury does not spill from the open stem end. |
- Remove the penetrometer spacer if used.
If the assembly is not to be placed immediately in the high pressure chamber, store it with the stem upward so that none of the mercury will be spilled. The rack for full penetrometers (part number 962-25827-00) can be used for this purpose. |
- Weigh the penetrometer assembly (remove the spacer first) if density calculations are to be made or blank correction by formula is used. Record this mass on the Sample Data Worksheet.
Do not wait an extended period of time before performing the high pressure run. Mercury remaining in contact with the sample for long periods of time after the low pressure analysis may oxidize and reduce the reproducibility of results. |
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