OPERATIONAL GUIDE
ORP electrode CONNECTION
The BNC connector is protected
against vapors and humidity by a wa-
terproof sheath.
• Slide the protective sheath down.
Connect the HI 3214P/2 ORP elec-
trode to the BNC connector and
then slide up. Make sure the con-
nector is completely covered.
• Do not be alarmed if white crystals appear around the
electrode protective cap. This is normal with ORP elec-
trodes and they dissolve when rinsed with water.
HI 982401 ORP
Range
±999 mV
Resolution
1 mV
Accuracy (@20°C/68°F)
±5 mV
Typical EMC Deviation
±5 mV
Setpoint
Selectable from 350 to 850 mV
Alarm
LED blinks when the measured
ORP value is lower than the setpoint
Calibration
Factory calibrated
Probe
HI 3214P/2 interchangeable ORP electrode
(optional)
Casing
IP54
Power Supply
12 Vdc adapter (included)
Dimensions
86 x 110 x 43 mm (3.4 x 4.3 x 1.7”)
Weight
150 g (5.3 oz.)
SPECIFICATIONS
3
P
R
• When not in use, rinse the electrode with water and store
it with the protective cap.
• If the electrode has been left dry, soak the tip in HI 70300
storage solution for at least one hour to reactivate it.
Taking ORP Measurements
• Turn the meter on.
• Remove the protective cap from the
ORP electrode and immerse the tip
(4 cm/1½”) in the sample.
• The LCD will show the ORP value
measured in mV unit. Allow the read-
ing to stabilize and HI 982401 will
start continuous monitoring.
Note: to prevent damages to the meter,
remove the ORP electrode from
the sample before turning the
meter off.
Adjusting the Setpoint
• To access the MEASURE/SET switch
and the setpoint adjustment trimmer,
unscrew the 4 screws on the meter
back and remove the rear panel.
• Move the switch to the SET position
(left).
4
