Electro-Chemical Devices (ECD) L20 - Manual (Page 3)

General Introduction
Thank you for selecting the Model L20 pH meter. The Model L20 is
a precision tool that measures pH, mV, ORP and temperature. A
built-in microprocessor stores, calculates and compensates for all
parameters related to pH determinations including pH electrode
temperature characteristics, electrode slope deviations and buffer
solutions.
This meter has a waterproof IP54 case. The mechanical keys are
highly reliable with tactile and audio feedback. This meter is
powered by six AAA size alkaline batteries or with a UL approved
AC adapter (Output 9VDC). The meter also displays a “BAT”
message when the batteries are in need of replacement. Re-
calibration is not required when power is restored.
The front of the meter has a large LCD that displays pH or mV and
temperature simultaneously along with user prompts and mode
indicators. The unit prompts the user through calibration and
measurement procedures.
An AUTOLOCK feature for both pH and mV measurements
enables the unit to automatically sense the end point and “HOLD”
the display to indicate the end point value of a measurement.
AUTOLOCK and user prompts help eliminate most errors in
determining pH and mV values, resulting in precise, repeatable
and error-free measurements. The Model L20 can also be used in
non-AUTOLOCK mode.
The Model L20 is available with pH, ORP and ATC (Automatic
Temperature Compensation) probes. Other features include
single, dual or three point calibration, electrode offset
recognition, electrode slope recognition; electrode efficiency
display, built-in buffer coefficients, automatic or manual
temperature compensation, long battery life, and 50/60Hz AC
noise rejection. This meter is user-friendly, for field, industrial and
laboratory applications.
Initial Inspection
Carefully unpack the unit and accessories. Inspect for damages
made in shipment. If any damage is found, notify your ECD
representative immediately. All packing materials should be saved
until satisfactory operation is confirmed.
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