Setup Mode - Extech Instruments EC150 User Manual

TDS (Total Dissolved Solids) and Conductivity Measurements
1. Read the Measurement Preparation section above before continuing.
2. Use the MODE button to switch between the TDS and the Conductivity measurement modes.
In TDS mode the unit of measure is ppt (parts per thousand) or ppm (parts per million). In
Conductivity mode the units of measure are µS or mS (micro- or milli-Siemens).
3. The TDS conversion factor is set to 0.50 at the factory. To change the setting, refer to the
Setup section. Also refer to Appendix B (Conductivity-to-TDS Conversion Factors) and
Appendix C (Calculating TDS Conversion Factors) for more information.
4. To switch from Auto Range mode (default) to Manual Range mode press and hold the up
arrow button for at least two seconds as described previously.
Finishing a Measurement Session
After a measurement session:

Rinse the electrode in de-ionized water and store dry.

Affix the protective cap over the electrode when storing.

If the unit is to be left un-unused for a month or more, remove and store the batteries
separately.
Automatic Power OFF (Sleep mode)
The meter will automatically switch OFF after 20 minutes of inactivity. To disable the Sleep Mode:
With the instrument switched off, press and hold the SET and HLD/CAL buttons simultaneously until
the 'n' icon appears on the display. Release the buttons and the meter will power up. The meter will
now stay switched ON until the user manually switches it OFF. The meter reverts to the Sleep Mode
Active state each time it is powered down.

Setup Mode

Parameter P1: Temperature Units, Ambient Temperature, and Temperature Coefficient settings
1. From the normal operating mode, press and hold the SET button for at least 2 seconds until the
'Px' icon appears on the meter display (x = setup parameter number).
2. Use the arrow buttons to scroll to the P1 icon if necessary.
3. Press the SET button momentarily, the 'C' or 'F' icon should now be flashing and the 't.ut' icon
(abbreviation for temperature units) will be visible above the flashing unit.
4. Use the arrow keys to select the desired unit of measure.
5. Press the SET button momentarily to confirm the selection.
6. A temperature value will be flashing at the bottom of the display and the 't.nr' icon
(normalization temperature i.e., reference temperature) will be visible above the flashing
temperature. See Appendix D (Temperature Effects) for more information on reference
temperature.
7. Use the up arrow button to toggle between 68°F and 77°F (default is 77°F).
8. Press the SET button to confirm the setting.
9. The temperature coefficient value should now be flashing on the bottom of the display with the
't.Co' icon visible above it.
10. Use the arrow buttons to select the coefficient temperature (default is 23.1°C).
11. Press the SET button momentarily to confirm the selection.
12. The meter display should be back to the P1 level starting point.
13. Press and hold the SET button for at least 2 seconds to return to the normal operation mode or
press the SET button momentarily to move to Parameter P2 (see below).
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EC150-EU-EN-V2.0-9/11