Hanna Instruments HI 943500A - Manual (Page 4)

7 6
Unplug the instrument from power supply before
replacing the fuse.
REAR PANEL OF HI 8931 SERIES
1. POWER OUTPUT terminals (+20 V and COM) for connec-
tion to a conductivity transmitter (HI 8936)
2. mA INPUT from a conductivity transmitter
3. mA OUTPUT terminals for connection to a recorder
4. SET SELECT terminals for reverse control operation
5. SET terminals for connection to a dosing pump
6. ALARM terminals for connection to an external alarm device
7. Power supply terminals
8. Fuse holder
FUNCTIONAL DESCRIPTION
HI 8931 & HI 943500
KEYPAD
MEASURE
To read measurements and enable diagnostic tests
ΔAL
To display set tolerance of the alarm
SET To set working point
TEST SLOPE Diagnostic function
TEST OFFSET Diagnostic function
When a key is pressed, the corresponding LED lights up to indicate that
the function is active.
TRIMMERS
OFFSET For offset calibration
SLOPE For slope calibration
ΔAL
To set the alarm tolerance
COARSE To coarsely adjust the set point
SET FINE To finely adjust the set point
LEDS
SET ON To indicate that the dosage is active
ALARM To indicate an alarm condition