Hach DR/700 Procedures Manual page 677

COPPER, AUTOCATALYTIC,
10.
Press:
ZERO
The display will
count down from 0.
Then the display will
show 0.00 g/L and the
zero and S1 prompts
will turn off.
CALIBRATION
Perform a calibration for each bath formulation.
1) Prepare a "known sample" using the plating bath of a known, full-
strength copper concentration or titrate a sample of the bath to determine
its concentration.
2) Perform Steps 1 through 6 of the Autocatalytic Copper test procedure.
In Step 2 use the known standard as the bath sample.
3) Perform the Operator Program: Calibrating Procedure Using Two
Standards (paragraph 3.2.4.1 in the Instrument Manual). Use the
processed demineralized water (the blank) as Standard 1. Make the
display read 00.00 of whatever concentration units you would like to use
(i.e., g/L, %, mg/L).
4) Use the prepared known sample as Standard 2. Make the display
show the known copper concentration.
This procedure provides good readability on baths up to 3 g/L. If the
bath in use is more concentrated, dilute the sample and apply an
appropriate correction factor; see Sample Dilution Techniques
(Section I) for more information.
11.
Place the
prepared sample into
the adapter with the
Hach logo facing the
front of the
instrument.
Note: Save the blank for
future determinations.
81-3
continued
12.
Press:
READ
The display will
count down to 0.
Then the display will
show the results in
g/L copper (Cu).