Advanced Instruments 3300, User Manual

Page: 39 / 77

3
Calibration
This chapter describes the procedure for calibrating your
instrument. If you have questions or problems regarding the
calibration procedure, please consult
Chapter 4 —
Troubleshooting & Service .
Calibration procedure
Calibration of the Model 3300 is a simple procedure that
requires no adjustment of the instrument by the user. Simply
run the menu-driven calibration program requiring the testing
of standards at each of two calibration points. If the repeata-
bility is acceptable on these calibration points, the instrument
automatically performs internal calibration.
The calibration procedure is as follows. Note that maintaining
and loading accurate, uncontaminated standard samples is
extremely important.
1. At
“
Osmometer Ready ,
”
press the left soft key, labeled
[CALIB] to initiate the calibration process. The calibration
program will prompt you to run a sample of the 50 mOsm
calibration standard.
2. Run the 50 mOsm calibration standard as you would an
actual sample (see Chapter 2 — Operation). When the
instrument completes each test and reports the results (not
necessarily the exact standard value), raise the operating
cradle, remove the sampler, and clean the chamber as rec-
ommended in Chapter 2.
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