Troubleshooting; Battery Replacement And Disposal - Extech Instruments EC150 User Manual

Troubleshooting

Power ON is attempted but there is no display
 Be sure to press the ON-OFF but for at least 100mS to switch the meter ON.
 Check that batteries are positioned correctly, making good contact, and follow correct polarity.
 Replace the batteries if necessary.
 Remove and replace the existing batteries.
Display switches OFF
 This is normal when Auto Power OFF is activated.
 Replace the batteries if necessary.
Air Bubbles adhered to Electrode
 Stir the electrode completely and be sure to dip the electrode into a solution at an oblique angle.
Vertical dipping can cause many air bubbles to adhere.
 Gently tap the bottom of the solution container while stirring the electrode in the solution.
 Air can be blown across the electrode before dipping it into the solution.
Error Codes
 Refer to the Table below for details on Error Codes displayed by the meter.
Code Description
CONDUCTIVITY ERRORS
----- Measurement outside of range
E03 Conductivity is over-range
E04 Temperature error
TDS ERRORS
----- Measurement outside of range
E04 Temperature error
TEMPERATURE ERRORS
E01 Temperature circuit damaged
E02 Temperature value is below allowable
range or Temperature circuit damage
E03 Temperature value is above allowable
range or Temperature circuit damage

Battery Replacement and Disposal

When the low battery icon
accurate readings are still possible in this condition; however batteries should be replaced as soon as
possible:
1. Remove the two (2) Phillips screws from the rear of the meter (directly above the top of the
tilt stand).
2. Remove and safely place the battery compartment and screws where they will not be
damaged or lost.
3. Replace the six (6) 1.5V 'AA' batteries, observing polarity.
4. Replace the battery compartment cover with the two (2) Phillips screws.
All EU users are legally bound by the battery ordinance to return all used batteries to
collection points in your community or wherever batteries / accumulators are sold!
Disposal in the household garbage is prohibited!
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Suggestions
In Manual Range mode, press and hold the up arrow for 2 seconds to
change range or use the Auto Range mode.
Check with a standard buffer solution. If problem persists, repair meter.
In Manual Range mode, press and hold the up arrow for 2 seconds to
change range or use the Auto Range mode.
Repair meter.
Check again at room temperature. If error persists, repair meter.
Check again at room temperature. If error persists, repair meter.
appears on the LCD, the batteries must be replaced. Several hours of
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EC150-EU-EN-V2.0-9/11