User Guide

Instruction Manual CON 510
6
Normalization Temperature: The factory default value for normalization temperature is 25 °C. If you need to normalize
to a value other than 25 °C, see SETUP sub-menu P4.2.
4.2 Preparing the Meter for Calibration
Before starting calibration, make sure you are in the correct measurement mode. Otherwise press MODE key to toggle
between measurement modes. When you switch on the meter, it starts up in the last unit of measure when you last shut
off the meter.
DO NOT reuse calibration solutions after each calibration has been performed. Contaminants in the solution can affect
the calibration, and eventually the accuracy of the measurements. Use fresh calibration solution each time you calibrate
your meter. Always remember to rinse thoroughly with de-ionized water or a rinse solution after each calibration to
prevent any carry-over.
NOTE: When entering calibration mode, the meter will display the uncalibrated value.
To abort or exit from any calibration mode or SETUP options without confirming any set values, DO NOT press
the ENTER key. Press CAL/MEAS instead. This will retain the meter’s old calibration data in the specific measurement
range or previous SETUP options.
4.3 Calibration with Conductivity Standards and TDS factor
The concentration of salts dissolved in solution increases the conductivity of that solution. This relationship varies from
salt to salt and is roughly linear over a given range for a given salt. The TDS conversion factor is the number used by the
meter to convert from conductivity to TDS. Default is 0.50; allowed window is 0.40 to 1.00.
Instead of calibrating for TDS directly, you can calibrate the CON 510 bench meter by:
1. calibrating to conductivity standards and then
2. entering the appropriate TDS conversion factor into the meter.
To determine the conductivity to TDS conversion factor for your solution:
Addendum 2 lists some commonly used conversion factors.
Addendum 3 describes how to calculate the TDS conversion factor for other solutions.
Enter the TDS conversion factor into your meter as described under SETUP sub-menu P3.4.
4.4 Calibration for TDS Standards Directly
The factory default setting for TDS conversion factor is 0.50. If your solution has a different TDS factor, you can improve
the calibration accuracy by setting the correct TDS factor (0.40 to 1.00) prior to calibration in SETUP sub-menu P3.4.
4.5 Selection of Automatic or Manual Calibration
This meter is capable of performing either automatic for Conductivity measurement mode or manual calibration method
for both Conductivity and TDS measurement modes. In the automatic calibration mode, the meter automatically detects
and verifies the appropriate known calibration standards solutions being calibrated before accepting these particular
calibration standards as one of its calibration values in a specific measurement range. This automatic calibration mode
frees you from cumbersome calibration procedure. While in the manual calibration, non-standards calibration values can
be used for calibration, in which you can manually input the appropriate values as your desired calibration standards in
each specific range.
Proceed to SETUP main-menu P5.0 to select the type of calibration method before performing calibration.