Hanna Instruments HI 8510 - Manual (Page 7)

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FUNCTIONAL DESCRIPTION HI 8710
Keypad
SET
To set the pH dosage limit
MEASURE To enter measurement mode
and to enable diagnostic tests
SENSOR TEST To display electrode mV reading
and verify its working condition
ΔΔΔΔΔ AL To display & set alarm tolerance
pH 7 TEST To verify Offset compensation
pH 4 TEST To verify amplifier circuit
Trimmers
ΔΔΔΔΔ O For Offset calibration
SLOPE For Slope calibration
ΔΔΔΔΔ AL To set the alarm tolerance
SET/COARSE To coarsely adjust the setpoint
SET/FINE To finely adjust the setpoint
LEDs
ACID
Show that acid dosage is active
BASE Show that basic dosage is active
ΔΔΔΔΔ AL (blinking) Indicate an active alarm
FRONT PANEL
SLOPE
ACID BASE
Δ AL
0 Δ
COARSE
SET
FINE
SENSOR
TEST
MEA
SURE
Δ AL
SET
pH 7
TEST
pH 4
TEST
pH
HI 8710E pH
1. Fuse holder
2. Power supply terminals
3. Recorder output terminals
4. Connections to the transmitter
REAR PANEL HI 8512T
Unplug the instrument from the power
supply before replacing the fuse.