Hanna Instruments mV 602 Series, Instruction Manual

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ACCESSORIES
pH CALIBRATION SOLUTIONS
HI 7004M pH 4.01 buffer solution, 230 mL bottle
HI 7004L pH 4.01 buffer solution, 500 mL bottle
HI 7004/L pH 4.01 buffer solution, 1 L bottle
HI 7007M pH 7.01 buffer solution, 230 mL bottle
HI 7007L pH 7.01 buffer solution, 500 mL bottle
HI 7007/L pH 7.01 buffer solution, 1 L bottle
HI 7010M pH 10.01 buffer solution, 230 mL bottle
HI 7010L pH 10.01 buffer solution, 500 mL bottle
HI 7010/L pH 10.01 buffer solution, 1 L bottle
ORP SOLUTIONS
HI 7020M ORP test solution at 200-275 mV, 230 mL bottle
HI 7020L ORP test solution at 200-275, 500 mL bottle
HI 7091M Reducing pretreatment solution, 230 mL bottle
HI 7091L Reducing pretreatment solution, 500 mL bottle
HI 7092M Oxidizing pretreatment solution, 230 mL bottle
HI 7092L Oxidizing pretreatment solution, 500 mL bottle
ELECTRODE MAINTENANCE SOLUTIONS
HI 70300M Storage solution, 230 mL bottle
HI 70300L Storage solution, 500 mL bottle
HI 7061M General cleaning solution, 230 mL bottle
HI 7061L General cleaning solution, 500 mL bottle
HI 7073M Protein cleaning solution, 230 mL bottle
HI 7073L Protein cleaning solution, 500 mL bottle
HI 7074M Inorganic cleaning solution, 230 mL bottle
HI 7074L Inorganic cleaning solution, 500 mL bottle
HI 7077M Oil & Fat cleaning solution, 230 mL bottle
HI 7077L Oil & Fat cleaning solution, 500 mL bottle
HI 7071 3.5M KCl+AgCl electrolyte solution, 4x50 mL bottle, for single
junction electrodes
HI 7072 1M KNO
3
electrolyte solution, 4x50 mL bottle
HI 7082 3.5M KCl electrolyte solution, 4x50 mL bottle, for double junc-
tion electrodes
pH mV pH mV pH mV pH mV pH mV
0 990 1 920 2 860 3 800 4 740
5 680 6 640 7 580 8 520 9 460
10 400 11 340 12 280 13 220 14 160
Reducing pretreatment: immerse the electrode for a few min-
utes in
HI 7091 .
Oxidizing pretreatment: immerse the electrode for a few min-
utes in
HI 7092 .
If the pretreatment is not performed, the electrode will take
significantly longer to respond.
As with pH electrodes, gel-filled redox electrodes are more
suitable for industrial applications due to lesser mainte-
nance requirements. However, if working with refillable
electrodes, the electrolyte level should not fall more than
2½ cm (1") below the fill hole and topped up if necessary.
Use
HI 7071 refill solution for single junction and HI 7082
for double junction electrodes.
In the event that measurements are performed with solutions
containing sulfides or proteins, the cleaning of the diaphragm
of the reference electrode must be performed more often to
maintain the proper functioning of the ORP electrode. There-
fore, immerse it into
HI 7020 and measure the response; the
obtained value should be within 200 and 275 mV.
After this functional test, it is suggested to wash the electrode
thoroughly with water and proceed to the oxidizing or reduc-
ing pretreatment before taking measurements.
When not in use, the electrode tip should be kept moist and
far from any type of mechanical stress which might cause
damage. This can be achieved by installing the electrode in
such a way that it is constantly in a well filled with the sample
(stream or tank). When not in use, store the electrode with a
few drops of
HI 70300 storage solution in the protective
cap.
Note
With industrial applications, it is always recommended to
keep at least one spare electrode handy. When anomalies
are not resolved with a simple maintenance, change the elec-
trode to see if the problem is alleviated.