Hach-Lange SI794 P User Manual - Manual (Page 68)

68
Display Action Remark
If the zero offset of
the electrode is too
large (> ± 200 mV),
the CAL ERR error
message is generat-
ed. In that case the
electrode cannot be
calibrated.
Zero adjustment (ISFET)
Allows use of electrodes with differing nominal zero (pH only)
Press cal, enter code: 1001
Select position using ,
edit number using ,
press enter to proceed.
Immerse electrode in a
pH 7.00 buffer. Enter the tem-
perature-corrected pH value in
the range 6.50 to 7.50 using the
arrow keys (see buffer table).
Press enter to confirm.
The transmitter is in
the Hold mode.
If an invalid code is
entered, the
transmitter returns
to measuring mode.
Ready for calibration
“CAL” and “enter” are blinking.
Display (3 sec)
Stability check.
The measured value [mV] is
displayed.
The “hourglass” icon is blinking.
Note:
Stability check can
be stopped (by
pressing cal).
However, this
reduces calibration
accuracy.