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M400E Ozone Analyzer Operator’s Manual Advanced FEATURES of the M400E analyzer
7.1.5.3. Editing iDAS Parameters
Data parameters are types of data that may be measured and stored by the iDAS. For each Teledyne
Instruments analyzer model, the list of available data parameters is different, fully defined and not customizable.
Appendix A-5 lists firmware specific data parameters for the M400E. iDAS parameters include things like O
3
concentration measurements, temperatures of the various heaters placed around the analyzer, pressures and
flows of the pneumatic subsystem and other diagnostic measurements as well as calibration data such as slope
and offset.
Most data parameters have associated measurement units, such as mV, ppb, cm³/min, etc., although some
parameters have no units. With the exception of concentration readings, none of these units of measure can be
changed. To change the units of measure for concentration readings See Section 6.8.6.
Note
iDAS does not keep track of the units (i.e. PPM or PPB) of each concentration value and iDAS data files
may contain concentrations in multiple units if the unit was changed during data acquisition.
Each data parameter has user-configurable functions that define how the data are recorded:
Table 7-3: iDAS Data Parameter Functions
FUNCTION EFFECT
PARAMETER
Instrument-specific parameter name.
SAMPLE MODE
INST: Records instantaneous reading.
AVG: Records average reading during reporting interval.
MIN: Records minimum (instantaneous) reading during reporting interval.
MAX: Records maximum (instantaneous) reading during reporting interval.
SDEV: Records the standard deviation of the data points recorded during the reporting interval.
PRECISION
Decimal precision of parameter value (0-4).
STORE NUM.
SAMPLES
OFF: Stores only the average (default).
ON: Stores the average and the number of samples in each average for a parameter. This
property is only useful when the AVG sample mode is used. Note that the number of samples
is the same for all parameters in one channel and needs to be specified only for one of the
parameters in that channel.
Users can specify up to 50 parameters per data channel (the M400E provides about 40 parameters). However,
the number of parameters and channels is ultimately limited by available memory.
Data channels can be edited individually from the front panel without affecting other data channels. However,
when editing a data channel, such as during adding, deleting or editing parameters, all data for that particular
channel will be lost, because the iDAS can store only data of one format (number of parameter columns etc.) for
any given channel. In addition, an iDAS configuration can only be uploaded remotely as an entire set of
channels. Hence, remote update of the iDAS will always delete all current channels and stored data.
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