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Appendix A: Technical Reference
Error Messages
The data analyzer indicates an error by displaying “E.” followed by a 2-digit
hexadecimal number. The first digit indicates the command that caused the
error, while the second digit indicates the parameter that caused the error
message (first parameter indicated by 1, second parameter by 2, and so on).
Sample Error Message
E.13 E. ... Error message
1 ..... Error in Command 1
3 ..... Error in third parameter.
When an error occurs, press the data analyzer’s [HALT] key to clear the error
condition and message. Note that error messages must be cleared from the
data analyzer before it can receive any other commands from a connected
graphic scientific calculator.
• Since hexadecimal numbers are used to indicate errors, letters may ap-
pear in the second digit if the command has more than nine parameters:
a = parameter 10, b = parameter 11, c = parameter 12.
Probes
This section provides technical information about the probes that come with
the data analyzer. It also includes general technical information about probes
that can be connected to the data analyzer.
Light Probe
The light probe that comes with the data analyzer uses a photosensitive ele-
ment called a Cds to measure brightness, which is then converted to a nu-
meric value. The value produced does not correspond to any standard unit of
measurement, but simply indicates a relative measure of brightness in the
range of 100 to 999.
Light Probe Specifications
Channels: CH1, CH2, CH3 (analog)
Range: 100 to 999
Chemical Tolerance: None
Pins: 2 Ground
3 Vres
4 Auto-ID resistance
6 Signal
1
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