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GENERAL INTRODUCTION
The model pH100A is one of three instruments in the EcoSense product line from YSI. The
pH100A is a precision tool that measures pH, mV 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 instrument is waterproof (IP67) when the connector cap is installed. The mechanical
touch keys are highly reliable with tactile and audio feedback. This meter uses one 9V battery.
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 "lock" the display to indicate the end point value of a measurement.
The pH100A can also be used in non-AUTOLOCK mode. AUTOLOCK and user prompts help
eliminate most errors in determining pH and mV values, resulting in precise, repeatable,
error-free measurements.
The model pH100A is available with pH, mV, ORP and ATC (Automatic Temperature
Compensation) probes. Other features include electrode offset recognition, electrode slope
recognition, electrode efficiency display, built-in buffer coefficients, automatic or manual
temperature compensation, long battery life, 50 data set memory and 50/60 Hz AC noise
rejection. This meter is universal, user-friendly, for field, industrial and laboratory applications.
INITIAL INSPECTION
Carefully unpack the unit and accessories, and inspect for shipping damages. Compare
received parts with materials listed on the packing list. Notify YSI immediately of any damage
or missing parts. Save all packing materials until satisfactory operation is confirmed.
THE INSTRUMENT
Though the instrument is housed in a water-proof IP67 case, DO NOT use it underwater. The
connector is not waterproof unless the cap cable is installed. In case of submersion without
the cap connected, follow these steps immediately:
1.
Rinse unit carefully with distilled water. After rinsing and drying, inspect and clean
connectors to remove all contaminants that may affect probe connections.
2.
Wait for the unit and probe to dry completely before resuming operation.
3.
If the unit does not function correctly after steps 1 and 2, call YSI for possible repair or
replacement (see Warranty).
BATTERY INSTALLATION
An initial display of “BAT” on the LCD indicates approximately one
hour of battery life for unit operation within specifications. Replace
battery when “BAT” appears on the LCD. (See Figure 1.)
To replace battery, remove the two battery cover screws and
battery cover and o-ring. Replace the 9V battery. Replace battery
cover and o-ring (align the o-ring properly to insure a good seal)
and fasten the two battery cover screws for the splash-resistant
feature.
Battery Disposal
This instrument is powered by a 9 volt battery, which the user must remove and dispose of
when the batteries no longer power the instrument. Disposal requirements vary by country
Figure 1.
Battery Installation
