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4. SLOPE - this is part 2 of the pH calibration process, this line will
display the buffer to be used for SLOPE calibration, depending on
the choice you made on BUFFER 2. (See Step by step pH
Calibration.)
EFFICIENCY -After saving the SLOPE a new efficiency will be
displayed for about 4 seconds and then will move to the next page.
Efficiency = (new slope/ ideal slope) x 100%
We recommend that you use a new electrode, if the electrode
efficiency is lower than 80%.
Step by step pH calibration
1. Press the [CAL/VIEW] key to go to pH Calibration page. If the unit
is password locked, remove the password lock first.
2. Select buffer 1 (7.00 or 6.86), by using the [
] or [
/pH-Recal.]
keys, then press the [
] key to save your selection.
3. Select buffer 2 (4.00,4.01,9.18 or 10.01), by using the [
] or
[
/pH-Recal.] keys, then press the [
] key to save your selection.
4. Clean the pH electrode and temperature probe with de-ionized or
distilled water.
5. Place the pH electrode and Temperature probe into buffer 1.
6. Press the [
] key. A "WAIT" message will blink indicating that the
instrument is waiting for a stable reading. The display will be locked
to the buffer value corresponding to the temperature of buffer 1 (See
IX. pH Buffers). When a stable reading is reached, the unit will blink
a "SAVE" message.
7. Press the [
] key to save the STAND calibration and prepare to
do a SLOPE calibration or press the [
/pH-Recal.] key to
recalibrate buffer 1 and repeat from step 6.
If
"OVER" or "UNDER" (See VIII. ERROR DISPLAYS AND
TROUBLESHOOTING) is displayed or a blinking "SAVE" does not
show after more than few minutes then something is wrong with
your buffer 1 or electrode. Be sure your buffer 1 is correct or change
a new electrode and repeat from step 4.
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