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ORP Calibration Kit: solutions and powders for 80, 260, 470mV
(Example Photo)


 

ORP Calibration Kit: solutions and powders for 80, 260, 470mV

Accurately calibrate your instruments with Myron L Company Standard Solutions. All solutions have an accuracy of +/-1% based on values published in the International Critical Tables and traceable to the National Institute of Standards and Technology.






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Description Technical Specs
 
All Myron L handheld instruments are factory calibrated with NIST traceable Standard Solutions having specific conductivity/ppm values. MyronL Company Standard Solutions are made under strictly controlled conditions using reagent grade salts. These salts are mixed with deionized water having a resistivity of at least 5 megohms-cm purity.

Myron L Company Standard Solutions have an accuracy of +/-1% based on values published in the International Critical Tables and traceable to the National Institute of Standards and Technology.

ORP Calibration Kit: solutions and powders for 80, 260, 470mV

If you need Material Safety Data Sheets (MSDS), please click "Manuals & Literature" at the top of the website.

Steps to use the ORP Calibration Kit

1. Fill a beaker with de-ionized or distilled water to use for rinsing the electrode.

2. Fill a second beaker to the 1/2 oz mark with pH 7 buffer.
a) To this buffer add the amount of quinhydrone that stays on about 1/4 inch (6 mm) of the wood applicator (see sketch).
b) Use the wood applicator to stir the quinhydrone into the buffer.
c) A small amount of quinhydrone MUST remain undissolved; if all the quinhydrone dissolves add a small amount and stir. Repeat as necessary until a small amount of quinhydrone remains un-dissolved.

3. Fill a third beaker to the 1/2 oz mark with pH 4 buffer.
a) To this buffer add the amount of quinhydrone that stays on about 1/4 inch (6 mm) of the wood applicator (SEE FIG 1).
b) Use the wood applicator to stir the quinhydrone into the buffer (SEE FIG 2).
c) A small amount of quinhydrone MUST remain undissolved; See FIG 3 if all thequinhydrone dissolves add a small amount and stir. Repeat as necessary until a small amount of quinhydrone remains un-dissolved.

4. Rinse the ORP electrode and pat it dry with a soft tissue as shown in FIG 5.
a) Put it in the beaker filled with the seven buffer/quinhydrone mixture, stir the electrode gently and let it rest against the side of the beaker.
b) Allow the reading to stabilize for about 30 to 60 seconds and then not the reading.
c) The reading should be within about plus or minus 15 mv from the values in FIG 4.

5. Rinse the ORP electrode and pat it dry with a soft tissue
a) Put it in the beaker filled with the 4 buffer/quinhydrone mixture, stir the electrode gently and let it rest against the side of the beaker.
b) Allow the reading to stabilize for about 30 to 60 seconds and then note the reading (SEE FIG 6).
c) The reading should be between +170 mV and +185 mV above the reading in the 7 buffer mixture (step 4). For Example, if the reading from step 4 is +90 mV then the reading from this step should be between +260 mV (90 + 170) and+275 mV (90+185).
d) With time and/or use, the value in the 7 buffer (step 4) may change. However, the +170 mV to +185 mV change in reading between 7 and 4 buffers (steps 4 and 5) should remain the same. Obtaining this reading means that the electrode has good span and should be able to be calibrated along with the meter to reflect the proper ORP(REDOX) potential

6. If a short span is found—less than a +170 mV change between the 7 and 4 buffers (steps 4 and 5)—the platinum measuring surface may be coated. Remove the coating by one of the following means:
a) Wipe the surface clean with a soft cloth or tissue.
b) Soak the electrode in a chemical known to dissolve the suspected coating material.
c) As a last resort, very gently polish the surface with 600 grade wet silicone carbide paper.
d) After cleaning, let the electrode soak in one of the calibration solution for about five minutes before re-calibrating

7. The buffer/quinhydrone mixture should be freshly made each time the ORP electrodes are calibrated. Do not store the mixture or use after two hours as their values change with time (SEE FIG 7).





What's Included
  • ORP Calibration Kit includes:
  • All required solutions and powders for 80, 260, 470mV
  • Solution Instructions (Directions, Storage, etc)

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