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2. Design and function
All manuals and user guides at all-guides.com
2.2 Description
Data processing and data storage
The analytic instrument model GA11 is a multi-sensor system for examining the quality
of N
/ CleanAir / DryAir, e.g. in switchgear. The basic instrument consists of a built-in
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EN
computer with touchscreen for processing and storage of up to 500 data records. The
data records can be exported via the integrated USB interface.
Extendable sensor system
The sensor system of GA11 is module-based and can be extended. In addition, there
is the possibility of storing measuring gas internally as well as pumping it back into the
original gas compartment without losses after the measurement.
Automatic adjustment of the gas quality
After the measurement, the results will be compared with customer-specifically
adjustable limit values according to e.g. CIGRE B3.02.01 or IEC 60480 standards. The
operator thus obtains a reliable statement on whether the insulating gas is suitable for
the given application or not, or whether it is necessary to perform a gas processing or
a gas exchange. For gas mixtures based on N
/ CleanAir / DryAir, there might not yet
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be any standards or limit values available. It is recommended that, before measuring
the gas quality, the requirements and the limit values are verified with the respective
manufacturer.
Battery life
If the lithium-ion rechargeable battery is fully charged, the analytic instrument can
perform at least 5 measurements with the "pumping back" function. The number of the
battery-powered pump-back cycles is largely dependent on the container pressure of the
gas to be measured.
The GA11 sends a warning message on the display when battery is low.
If the instrument is not connected to the mains in time, it will shut down automatically in
order to prevent damages and data loss. In the mains operation, the battery is charged
and the instrument can be switched on again at the same time and operate without
restrictions.
Power and charging indicators
The front control panel has two LEDs which indicate the charging status (red) or mains
operation (green).
If an error occurs during the charge cycle, the charging indicator flashes (red).
WIKA operating instructions analytic instrument, model GA11
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