Calibrate Volume Scale

Calibrates the cell volume offset and expansion volume.

Although the instrument is calibrated prior to shipment, the pycnometer should be recalibrated to laboratory atmospheric and environmental conditions.

  1. Remove the chamber cap and place an empty cup into the sample chamber, then replace the cap. If an insert is being used, place the insert and its sample cup into the chamber.
 

Wear latex or nitrile, powder-free gloves to prevent transfer of oil from hands when handling sample cups, calibration standards, and inserts. See Handling System Components.

  1. Go to Unit [n] > Calibration > Calibrate Volume.

  1. Enter the volume of the calibration standard (located on the outside of the calibration standards case shipped with the instrument) in the Volume of Calibration Standard field.

The value recorded on the case for a 10 cm3 pycnometer is the sum of the two standards, and on a 350 cm3 pycnometer, the sum of the three standards.

  1. Select the Measured option.
  2. Click Analysis Conditions to specify calibration parameters. Click Replace and select the file Standard.anc. The values in the current file will be replaced with those contained in the selected file. Click OK, then click OK again to return to the Calibrate Volume Scale window.

  1. Click Start to begin the first phase of the calibration (volume offset). Status messages display until this phase is complete. When the phase has finished, a prompt display indicates to insert the calibration standard.
  2. Remove the sample chamber cap, then remove the sample cup from the chamber. Place the cap back onto the chamber while placing the standard into the cup.
  3. Tilt the sample cup and allow the standard to roll gently into the cup to prevent denting of the cup.

  • one standard is shipped with the 1-, 100-, and 2000 cm3 pycnometers
  • two are shipped with the 10 cm3 pycnometer
  • three are shipped with the 350 cm3 pycnometer
  1. Remove the sample chamber cap, place the sample cup back into the chamber, and replace the cap. Turn the cap clockwise to tighten.
  2. Allow the standards to reach thermal equilibrium with the pycnometer.
  • Wait 10 minutes for 1- and 10 cm3 pycnometer
  • Wait 15 minutes for the 100 cm3 pycnometer
  • Wait 20 minutes for the 350 cm3 pycnometer
  • 30 minutes for the 2000 cm3 pycnometer
  1. Click Continue to complete the second phase of the calibration (volume scale). Status messages display until the calibration is complete.
  2. Click Done to accept the new values, then click OK.
  3. Do not remove the standard from the sample chamber until the operation is verified. See Verify Operation.
Calibrate Volume Scale
Field or Button Description
Analysis Conditions

Specify conditions for the calibration.

Click Replace to replace the values with those from an existing Analysis Conditions file.

Cell Volume
Displays the current cell volume (without an insert), or the volume of the selected insert.
Continue [button] Place the standard into the sample cup and click Continue to complete the volume scale calibration.
Expansion Volume Displays the current expansion volume, and the date and time of calibration.
Insert
1 cm3 unit   None, 0.1 cm3
10 cm3 unit None, 3.5 cm3
1.0 cm3100 cm3 unit None, 35 cm3, 10 cm3
350 cm3 and 2000 cm3 units None, Large, Small

If None is selected, pace an empty sample cup in the chamber.

Previous / Entered / Measured
[check box]

Select the method for calibrating the cell and expansion volumes.

Previous. Uses the current values.

Entered. Enables the fields for the cell and expansion volumes.

Measured. Measure the cell and expansion volumes using a reference standard.

Start [button] Begins the first segment of the volume offset calibration.
Volume of Calibration Standard [text box] The volume of the standard used for the previous calibration.
  For fields and buttons not listed in this table, see Common Fields and Buttons.
 
Micromeritics Learning Center    Contact Us

Copyright © 2019. Micromeritics Instrument Corporation. All rights reserved.