User Guide

20
FUNCTIONAL DESCRIPTION HI 8720
ORP CONTROLLER
Keypad
SET To set the working point of ORP
dosage
MEASURE To set HI 8720 on measurement
mode and to enable the diag-
nostic tests
∆∆
∆∆
∆Al To display and to set the toler-
ance of the alarm points
0 mV TEST To verify the instrument calibra-
tion at point 0
500 mV TEST To verify the slope at point
500 mV
FRONT PANEL
SLOPEDOSAGE
OXID. REDUC.
∆AL
COARSE
SET
FINE
∆AL
MEA
SURE
SET
0 mV
TEST
500 mV
TEST
mV
HI 8720E
ORP