Bluelab EC Pen - Manual (Page 3)

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4.0 Calibration
Calibration of conductivity is not required for this unit as it is factory calibrated.
However; if you wish to calibrate the unit follow the instructions below.
YOU MUST CLEAN THE PROBE BEFORE CALIBRATING.
See section 2.0.
Rinse probe in fresh water and place it in a known
standard solution. See chart below for the correct
solution.
Wait for reading to stabilize.
Hold down the cal button for 3 seconds until CAL
appears.
Release button and CAL P should be displayed. If Err is
displayed check the probe is clean and that the calibration
solution is fresh and uncontaminated.
A tick will appear on the screen to indicate that the calibration
was successful. The tick will disappear after 30 days. To reset
back to factory default remove/replace battery.
NOTE: If you need to test or calibrate in a 1500 ppm
solution, you MUST set the pen to EC, then multiply your
result by 540. If calibrating, multiply 2.8 by 540
(2.8 x 540 = 1512).
This unit DOES NOT measure in the 540 ppm scale.
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EC ppm 500
(TDS)
ppm 700
(EC x 700)
Solution value 2.77 1385 1940
Displayed value 2.8 1390 1940
1385
ppm
Hold for 3
seconds
5.0 Error messages
The following error messages appear for the following reasons.
Temperature
over range
Hardware
error
EC over range
Temperature
under range
Temperature
error
2.0 Cleaning and maintenance
Cleaning the EC pen probe periodically ensures accurate readings. The probe is
cleaned using the Bluelab Conductivity Probe Cleaner, or “Jif” a trade name for a liquid
scourer cream used in home bathrooms and kitchens. Similar products are called
“Liquid Vim”, “Soft Scrub”, “Cif cream”, or “Viss”. Never use scented varieties as they
contain oils that contaminate the probe. Follow the steps below to clean the probe.
Remove shroud
Hold the body and pull the shroud off. Holding your
hand around the shroud for a few seconds will help
with removal.
Clean probe face
Place one or two drops of probe cleaner onto the probe
face and rub with your finger or Bluelab Chamois firmly
and vigorously, to clean the probe face.
If a heavy build up occurs around the temperature sensor
clean with a soft toothbrush to remove contamination.
Rinse probe
Rinse off all traces of cleaner under running water using
the same finger or other side of Bluelab Chamois.
Check that the water forms a film on the probe face with
no “beads” of water. If beading is present repeat the
cleaning process.
Replace shroud and test in a known solution to
ensure the unit has been adequately cleaned.
3.0 Battery replacement
The EC pen is powered with 1 x AAA alkaline battery. Do not use rechargeable
batteries. A low battery warning is indicated by a battery symbol appearing on the
screen. Only remove the battery cap when the batteries require changing. Battery
life is expected to be 350 hours. Follow these steps to replace the battery.
Remove old battery
Undo battery cap fasteners. Remove battery cap and tip out
the old battery.
Check for corrosion
Flat batteries may leak and cause corrosion. Check battery
contacts and the battery for any sign of corrosion. Battery
contacts should be cleaned first if corrosion is found before
proceeding to step 3.
Fit new battery
Insert the new batteries positive (+) end down into the body.
Ensure waterproof battery cap seal is clean
Waterproof seal will fail if any dirt is around the seal and
body where the cap seals.
Replace battery cap
Tighten fasteners on battery cap until there is no space
left between the cap and body. This ensures the unit
remains 100% waterproof.
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Pull
Waterproof seal