After measurements – Hanna Instruments HI 8521 User Manual

Page 17

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For HI8417 and HI8521
• Connect the ORP electrode to the meter and submerge the tip (4

cm / 1½") into the sample to be tested.

Note: ORP measurements are taken without temperature compensa-

tion.

• Press the pH/mV key (HI8417) or

RANGE key (HI8521) once to enter
the mV mode.

• Allow a few minutes for the reading to

stabilize.

• The display will indicate the absolute

mV value (positive or negative).

• When values are less than ±400 mV, tenths of mV are dis-

played; for values greater than ±400 mV, the decimal digit
disappears. Note that the change in scale (from 0.1mV to 1mV
resolution) is automatic. "Err2" for HI8417 or "E3" for HI8521
appears if the value exceeds ±1999 mV (out of range).

AFTER MEASUREMENTS

• Press the ON/OFF key again to switch the instru-

ment OFF.

RANGE

OFF