Calibrating With Other Buffers - Hach sension 4 Instruction Manual

SECTION 3,
continued

3.2.2 Calibrating With Other Buffers

accept the reading. This lets the operator control the acceptance
point of the buffer.
7. When the reading has been accepted, the standard number
will change to
2
8. Remove the probe from the first buffer and rinse with
deionized water. Place the probe in the second buffer.
9. Press
READ/ENTER
updated until a stable reading is reached.
10. When the reading has been accepted, the standard number
will change to
3
11. Repeat steps 8 and 9 for the third, fourth, or fifth buffer or
press . The slope value and the
EXIT
appear. Verify the slope value is within the ranges specified in
the electrode manual.
12. To save the calibration and return to the reading mode, press
. To exit the calibration without saving it and return to
ENTER
the reading mode, press
1. Select the desired channel. If using a probe without a
temperature sensor, see Sections 2.3.2 on page 22 and 2.6 on
page 23 for information about obtaining and using a
default temperature.
2. Prepare two pH buffers that bracket the sample according to
the electrode instruction manual.
3. Turn the instrument on. Select the desired channel. If
necessary, press the
mode ( will be displayed).
pH
4. From the reading mode, press
appear in the lower left part of the display.
appear in the upper display area, along with
The numeric keypad will become active.
32
.
. The temperature and pH values will be
.
Store
.
EXIT
key to get into the pH reading
H/mV
P
. Functional keys will
CAL
and icons will
?
and will
CAL ?
and .
Standard 1