User Guide

15
FOR HI8615L ONLY:
The HI 8615L is factory calibrated, and the
displayed values are referenced to the 4-20
mA loop current (e.g. LCD displays -1000
mV when loop current is 4.00 mA and dis-
plays +1000 mV when current is 20.00 mA).
Under normal application, adjustment on this
module may not be necessary. If routine
check is required, the following procedures
shall be performed.
• Follow the above procedure for HI8615
(see page 12).
• Simulate a 12.00 mA loop current for the
transmitter (i.e. 0 mV at Electrode input)
and check display reading.
• Simulate a 20.00 mA loop current for the
transmitter (e.g. +1000 mV at Electrode
input) and check display reading.
INPUT
-VE LO
O
P
+VE LO
O
P
HI931001
pH/mV
Calibrator
mV
INPUT
-VE LO
O
P
+VE LO
O
P
mV
HI931001
pH/mV
Calibrator