5
Range
0 to 400 ppm of SO
2
Resolution
1 ppm
Accuracy
5% of reading
Method
Ripper titrimetric method
Principle
Equivalence point redox titration
Sample volume
50 mL
ORP Electrode
HI 3148B
(included)
Pump debit
0.5 mL/min
Stirring speed
1500 rpm
Environment
0 to 50 °C (32 to 122 °F); max 95% RH non-condensing
Power supply
220V/50Hz; 10VA
Dimensions
208 x 214 x 163 mm (8.2 x 8.4 x 6.4") (with beaker)
Weight
2200 g (77.6 oz.)
REQUIRED REAGENTS
Code
Description
Quantity/test
HI 84100-50
Titrant (for Free & Total SO
2
)
HI 84100-51
Alkaline Reagent (for Total SO
2
) 5 mL
HI 84100-52
Acid Reagent (for Total SO
2
)
5 mL
HI 84100-53
Acid Reagent (for Free SO
2
)
5 mL
HI 84100-54
Stabilizer (for Free & Total SO
2
) 1 packet
HI 84100-55
Standard (for Free & Total SO
2
) 50 mL
SPECIFICATIONS
16
PREPARATION PROCEDURE
Remove the protective cap of the ORP electrode (
HI 3148B
).
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes. They will
disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb affecting proper functioning of
the electrode. These bubbles can be removed by “shaking down” the electrode as you would do
with a glass thermometer.
If the bulb and/or junction is dry, soak the electrode in
HI 70300
Storage Solution for at least one hour.
If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add
HI 7082
3.5M
KCl Electrolyte Solution.
ELECTRODE CONDITIONING & MAINTENANCE
FUSE REPLACEMENT
To change the fuse follow next steps:
• Disconnect the power cord from the rear panel of
the instrument.
• Pull out the fuse holder located near the power cord
connector.
• Replace the fuse with a similar one.
• Push the fuse holder with the fuse in the appropriate
place.