LSI LASTEM E-Log – User’s manual
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1)
Measurement of the electrical signal based on its type (voltage, resistance, frequency, etc.)
and its digital conversion into a 16-bit numeric value; the physical type of the sensor is
programmed through parameter
Electrical measure type
;
2)
Data validation: during this operation the value is limited within the scale values allowed by
the physical type of measure;
3)
Possible thermocouple value correction through the measure of the cold junction
temperature (internal temperature of the instrument);
4)
Linearization of non linear signals based on the setting of parameter
Linearization type
; the
linearization may also take place through the setting of a polynominal function whose
factors are specified until 10° degree (section
Linear parameter
of
3DOM
);
5)
Recalculation of the value according to numeric parameters defined in section
Parameters:
Computation of the measured quantity through the defined initial and final scale values;
Application of the calibration factor of the specific used sensor (radiometers, rain
gauges, etc.);
Selection of the logical state with reference to the analogue signal thresholds;
Measure validation after processing accompanied by error indication if greater (by 0.5%)
than the limits set in output; wind direction and relative humidity are excluded;
Linearized quantity control: the instrument produces null output when receiving null
input.
All above parameters are indicated in section
Measure properties
in the measure modification
window of program
3DOM
.
5.2.4.
Acquisition from status signals
E-Log is able to acquire different types of digital status; they have to be configured for their
connection to 9, 10, 11 and 12 inputs.
Ther are 3 different signal types: frequency signals, digital status and counters.
The default configuration of acquirer has been made for:
give logical status = 1 In case of short circuit or 0 V
give logical status = 0 In case of opened contact or 3 V
Furthermore if one configuration for low power consumption is selected:
For signals with frequencies over 1000 Hz it’s better the input 9;
For signals with frequencies under 1000 Hz, for counters and logical status they’re better
the inputs 11 and 12;
Do not configure the input 10 because it doesn’t reduce the instrument’s low power
consumption.
If it’s been selected one configuration with no attention to power consumption:
For signals with frequencies over 1000 Hz use the inputs 9 and 10;
For signals with frequencies under 1000 Hz and for logical status use any inputs among the
available ones.
The sensors with status output that produce voltage (i.e. they aren’t pure contacts “open/closed”)
but with variable voltage according to measured status, can be connected to E-Log through one
Summary of Contents for E-Log
Page 1: ...Cod INSTUM_00351_en E Log User s manual Updated on 09 18 2017...
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Page 60: ...LSI LASTEM E Log User s manual 60 6 6 Mask of terminal board...
Page 61: ...LSI LASTEM E Log User s manual 61 6 7 Connection cables...
Page 62: ...LSI LASTEM E Log User s manual 62 6 8 Declaration of Conformity...
