®
Oxidation Reduction Potential Probe
Technical Support
2
012-15717A
(**SE-7287 100 ml or SE-7288 1000 ml Beakers)
Preparation of the Electrode
1. Combination ORP electrodes are shipped with a
storage bottle with storage solution. Keep the
solution bottle and solution for future use.
2. Remove the storage bottle from the electrode and
thoroughly rinse the electrode with distilled water.
Wipe carefully with a clean lab wipe.
Software Help
See the SPARKvue Help or PASCO Capstone Help for
information about collecting, displaying, and analyzing
data.
•
In SPARKvue, select the HELP button in any screen
including the Home Screen.
•
In PASCO Capstone, select PASCO Capstone Help
from the Help menu, or press F1.
Checking Electrode Operation
1. Connect your ORP electrode to the input connector
on the Wireless pH /ISE/ORP Sensor (or other pH
measuring device). Ensure that the electrode
connection is secure.
2. Place the electrode into a beaker containing
quinhydrone saturated pH 7.00 buffer. Stir gently.
The mV reading E1 should be 86 ± 20 mV.
3. Remove the electrode from the buffer. Rinse with
distilled water and blot with a lab wipe.
4. Place the electrode into a beaker containing
quinhydrone saturated pH 4.01 buffer. Stir gently.
Record the mV reading E2. The difference between
E2 and E1, (E2-E1), should be 175 ± 20 mV.
Reading a Sample with the Electrode
1. Rinse the electrode with distilled water and blot with
a lab wipe. Place the electrode in a beaker
containing the sample and a stir bar. Stir as before.
Record the mV when the reading is sta-ble.
2. Remove the electrode from the sample, rinse the
electrode with distilled water over the "waste"
beaker. Blot the electrode dry with a lab wipe. The
electrode is now ready to read the ORP readings of
other samples.
Storing the Electrode
Short Term
Between measurements, immerse the ORP electrode in
the storage solution.
Long Term
When storing for long periods, store the ORP electrode
in the storage bottle which came with the electrode.
Electrode Cleaning
Contamination of the sensing element often results in
slow response and inaccurate readings. Clean the
element by one of the following procedures:
1. Inorganic Deposits: Immerse electrode tip in 0.1 N
HC1 for 10 minutes. Wash the tip with distilled
water.
2. Organic Oil and Grease Films: Wash electrode tip in
a liquid detergent and water.
3. After above treatment, soak the electrode tip in
alcohol for 5 minutes and wipe dry, then, soak in
quinhydrone saturated pH 4.01 for 15 minutes; rinse
with distilled water afterwards.
NOTE: DO NOT ATTEMPT TO SAND OR POLISH THE
SENSING ELE-MENT WITH SAND PAPER OR OTHER
POLISHING MATERIAL!
Technical Support
For assistance with any PASCO product, contact
PASCO at:
Limited Warranty
For a description of the product warranty, see the PASCO catalog.
Copyright
This PASCO scientific instruction sheet is copyrighted with all rights
reserved. Permission is granted to non-profit educational institutions for
reproduction of any part of this manual, providing the reproductions are
used only in their laboratories and classrooms, and are not sold for profit.
Reproduction under any other circumstances, without the written consent
of PASCO scientific, is prohibited. Rev: 10/17
Address:
PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone:
916-462-8384 (worldwide)
800-772-8700 (U.S)
Email:
