Ec / Tds; Preparation; Calibration - Milwaukee MW306 MAX Instruction Manual

Ec / tds / nacl / temperature portable meter

Table of Contents

8. EC / TDS

Pour small quantities of conductivity calibration solution into

clean beakers. To minimize cross-contamination, use two beakers:

one for rinsing the probe and the other for calibration.

Note: At power on the meter starts measuring with the

previously selected range (conductivity, TDS or salinity).

Note: A new EC calibration automatically clears the %NaCl

calibration . "NO CAL" message is displayed blinking.

General Guidelines

For better accuracy frequent calibration is recommended. The

probe should be calibrated:

y Whenever is replaced

y After testing aggressive samples

y When high accuracy is required

y If "NO CAL" is displayed on the third LCD line

y At least once a week

Before performing a calibration:

y Inspect the probe for debris or blockages.

y Always use an EC calibration standard that is close to the

sample. Selectable calibration points are 0.00 S for o set and

84 S/cm, 1413 S/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm,

111.8 mS/cm for slope.

To enter EC calibration:

1. Use the  keys to elect the EC range and press CAL/EDIT.

When the reading is stable and close to the selected

calibration standard, STD and ACCEPT tags are displayed

blinking.

2. Press GLP/ACCEPT key to confirm calibration. The instrument

displays "SAVING", stores calibration values and returns to

measurement mode.

EC / TDS 23

Table of Contents