Hanna Instruments Intercom System HI 982401 User Manual
1. M
OLDED
EYE
2. A
LARM
LED
3. BNC
CONNECTOR
4. HI 3214P/2
ORP
ELECTRODE
5. 12 V
DC
POWER
ADAPTER
6. P
ROTECTIVE
SHEATH
7. L
IQUID
C
RYSTAL
D
ISPLAY
P
FUNCTIONAL DESCRIPTION
The alarm setpoint is adjustable and if the ORP value is out
of range the user is alerted by a red light.
of range the user is alerted by a red light.
The meter is factory calibrated and does not need recalibration.
You no longer need to worry about battery changes: the unit
runs without interruption on 12 Vdc power supply.
runs without interruption on 12 Vdc power supply.
2
• With a small screwdriver ad-
just the setpoint trimmer to
display the desired value in
the 350 to 850 mV range (e.g.
680 mV).
display the desired value in
the 350 to 850 mV range (e.g.
680 mV).
• Moved back the switch to
the MEASURE position.
• Close the meter while mak-
ing sure the gasket is in
place before tightening the
screws.
place before tightening the
screws.
• Whenever the mV reading is
lower than the setpoint, the
red alarm LED blinks to warn
the user.
red alarm LED blinks to warn
the user.
Maintenance
To minimize clogging and provide longer life to the ORP
electrode, it si recommended to clean it monthly.
Immerse the tip of the electrode in HI 7061 cleaning solution
for at least one hour and then rinse it with tap water.
Check the meter accuracy by immersing the electrode in the
HI 7020 test solution. The reading should be between 200
and 275 mV at 20°C (68°F).
Otherwise clean the platinum tip of the electrode by rubbing it
with a soft cotton or lint-free cloth soaked with HI 7061 clean-
ing solution.
After cleaning, condition the ORP electrode by leaving it in a
pretreatment reducing (HI 7091) or oxidizing (HI 7092) solu-
tion for half an hour.
electrode, it si recommended to clean it monthly.
Immerse the tip of the electrode in HI 7061 cleaning solution
for at least one hour and then rinse it with tap water.
Check the meter accuracy by immersing the electrode in the
HI 7020 test solution. The reading should be between 200
and 275 mV at 20°C (68°F).
Otherwise clean the platinum tip of the electrode by rubbing it
with a soft cotton or lint-free cloth soaked with HI 7061 clean-
ing solution.
After cleaning, condition the ORP electrode by leaving it in a
pretreatment reducing (HI 7091) or oxidizing (HI 7092) solu-
tion for half an hour.
5