Hanna Instruments HI 98150N - Manual (Page 17)

17
To enter Rel mV operation press 2nd and Mode from mV measurement.
• Place the ORP electrode into solution or
standard.
• Wait for a stable mV to be displayed.
• Press
CAL when the instrument is in
RELATIVE mV measurement mode. The
relative mV value is displayed on the
primary LCD and the absolute mV value
on the secondary LCD.
• Use the ARROW keys to change the displayed relative mV value.
• When the reading is stable, in mV range and the Relative mV offset
is inside the offset window (±2000 mV), “ CFM” tag blinks.
• Press CFM to confirm the relative mV calibration. The instrument will
return to measurement mode.
• If the absolute mV reading is out of range or the Relative mV offset
is out of the offset window, “ WRONG” tag will blink. Verify sensor tip
is fully submersed in solution and electrode is fully plugged in.
RELATIVE RELATIVE RELATIVE RELATIVE RELATIVE m m m m mV CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION V CALIBRATION
(HI 981 (HI 981 (HI 981 (HI 981 (HI 98150 50 50 50 50 & HI 981 & HI 981 & HI 981 & HI 981 & HI 98160 60 60 60 60)))))
However, temperature correction during pH measurements provides
values at the temperature of measurement. Actual pH values may differ
if measured at two different temperatures.