Bluelab ppm Pen - Manual (Page 5)

5.0 Error messages
The following error messages appear for the following reasons.
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 check mark will appear on the screen to indicate that
the calibration was successful. The check mark 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.
Temperature
over range
ppm over range
Temperature error
Hardware error
Temperature
under range
English
5
1
2
3
4
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