Hach DR/700 Procedures Manual page 702

PHOSPHORUS, REACTIVE,
16.
Place the
prepared sample into
the adapter with the
Hach logo facing the
front of the
instrument.
CALIBRATION PROCEDURE
1) If the DR/700 is on and in a pre-programmed method, proceed to Step
3. If it is off, press the
wavelength and the lower display will show the module installed and the
software version number. Verify that filter module 81.01 is installed.
2) After 2 seconds, the display will show a concentration format, a
program number and the ZERO prompt.
3) Press the
PROGRAM
ZERO annunciator will flash.
4) Press the
CAL
will flash
5) Press the UP ARROW
the
RIGHT ARROW
all four digits are set to 0.
6) Press the
RIGHT ARROW
key to move the decimal point so the display reads 0.000 for
UP ARROW
3-
PO .
4
7) Press the
RIGHT ARROW
until mg/L is displayed.
UP ARROW
8) Prepare a demineralized water blank in a sample vial. Cap the vial and
put it into the DR/700.
17.
Press:
The display will
count down to 0.
Then the display will
show the results in
3-
mg/L PO
4
key. The upper display will show the
I/O
key to obtain program number 81.000. The
key. The S1 annunciator and the first digit on the left
key to set the first digit to 0. When correct, press
key to select the next digit. Repeat this procedure until
key until the decimal point flashes. Press the
key. A units indicator will flash. Press the
81-28
continued
READ
.