Maintenance; Troubleshooting - Extech Instruments EC170 User Manual

Maintenance
 Keep the meter's measurement electrode clean. Between measurements, rinse the electrode
with deionized or distilled water. If the electrode has been exposed to a solvent immiscible in
water, clean it with a solvent miscible in water, e.g. Ethanol, and then rinse carefully with
water.
 Store the electrode carefully. Before storing, rinse carefully in deionized or distilled water and
store dry.
Troubleshooting
Power ON is attempted but there is no display
 Be sure to press the ON‐OFF button for at least 100mS to switch the meter ON.
 Check that batteries are positioned correctly, making good contact, and 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
SALINITY ERRORS
‐‐‐‐‐
E03
E04
TEMPERATURE ERRORS
E01
E02
E03
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Measurement outside of
range
Salinity is over‐range
Temperature error
Temperature circuit
damaged
Temperature value is below
allowable range or
Temperature circuit damage
Temperature value is above
allowable range or
Temperature circuit damage
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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 against a standard buffer solution. If
problem persists, repair meter
Repair meter
Repair meter
Check again at room temperature. If error
persists, repair meter
Check again at room temperature. If error
persists, repair meter
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