Abstract
Operation of an optical particle counter with microprocessor control of particle size calibration and data recording is described. Sensors are available to measure particles O.1 μm and larger. A system with a range from 2 μm to 125 μm will be described. Calibration data based on response to monosized particles are stored in the system memory, along with sensor resolution information and system changes since the last calibration. The instrument adjusts the particle size channels internally for the selected calibration base particles. Once calibrated, the instrument can be set to report data in operator selectable sizes or any of four default particle size groups. Three default groups are based on pharmaceutical and hydraulic fluid power industry standards and one is set in a logarithmic spread of 16 particle sizes that covers the system dynamic range. A front-panel keyboard and CRT display allow selection and control of all operating parameters. These include reported size ranges, liquid sample size, number of sample replications (including suspect sample rejection), data averaging, and comparison of data from two sensors. Differential or cumulative data can be reported in tabular or histogram format. Data can be sent to an internal thermal printer or to an RS-232C output.
- Received July 31, 1989.
- Accepted December 13, 1989.
- Copyright © Parenteral Drug Association. All rights reserved.
PDA members receive access to all articles published in the current year and previous volume year. Institutional subscribers received access to all content. Log in below to receive access to this article if you are either of these.
If you are neither or you are a PDA member trying to access an article outside of your membership license, then you must purchase access to this article (below). If you do not have a username or password for JPST, you will be required to create an account prior to purchasing.
Full issue PDFs are for PDA members only.
Note to pda.org users
The PDA and PDA bookstore websites (www.pda.org and www.pda.org/bookstore) are separate websites from the PDA JPST website. When you first join PDA, your initial UserID and Password are sent to HighWirePress to create your PDA JPST account. Subsequent UserrID and Password changes required at the PDA websites will not pass on to PDA JPST and vice versa. If you forget your PDA JPST UserID and/or Password, you can request help to retrieve UserID and reset Password below.
Log in using your username and password
Log in through your institution
Purchase access
patientACCESS
In This Issue
Jump to section
Related Articles
Cited By...
- No citing articles found.