User Guide

14
• Set the simulator to 350 mV and adjust
the slope trimmer to read 14.8 mA on
the ammeter or 350 mV on the HI 8615L
display (HI 8615L only).
• Connect the ORP electrode to the mod-
ule and immerse the tip of the electrode
into the beaker of HI 7020 ORP solution
and check that the ammeter reading lies
between 13.6 and 14.2 mA or the instru-
ment reading is between 200 and 275mV
at 25°C (HI 8615L only).
• Only if the reading lies out-
side this range, adjust the
slope adjustment trimmer
on the transmitter to reflect
a reading within this range.
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT
mA
mA
HI 7020
INPUT
-VE LO
O
P
+VE LO
O
P
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT