Hanna Instruments HI 98160 - 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.