User Guide

19
• When the reading becomes stable, if the ORP value is
close to the calibration point, the “CFM” indicator starts
blinking; otherwise the “WRONG” indicator blinks and
the “CAL” is fixed on.
• In the first case press CFM to confirm calibration. The
meter will proceed showing the scrolling message “Press
CFM again to confirm the current buffer or right to es-
cape” (to prevent from confirming the calibration point
inadvertently). Pressing again CFM the secondary LCD will
display the second calibration point.
• In the second case (blinking “WRONG”) the meter will
remain in the WRONG state until the reading becomes
unstable or the calibration mode is exited by pressing the
CAL key.
• For the second calibration point it is possible to choose
between 350 mV or 1900 mV. Pressing the  or  key the
value on the secondary LCD will switch between the two
possibilities.
• Once selected the second calibration point, set the HI
931001 (350 mV) or HI 8427 (350 or 1900 mV) simula-
tor to the same value and the calibration proceeds as for
the first point.
Note In ORP calibration there is no time-out.
ANALOG OUTPUT CALIBRATION
The instrument can be provided with one or two analog out-
puts, each of them can be calibrated.
• Connect an Ammeter or the HI 931002 calibrator to the
analog output to measure the current erogated by the meter.
• Enter the calibration mode and move through the menu
using the  or  key until “Out 1” or “Out 2” message
appears on the primary LCD.