Fema LP4, Руководство пользователя

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F E MA · MANUFACTURING FOR INDUSTRIAL AUTOMATION 6
13. Configuration menu
13.1 Scaling
At the ‘ Scaling ’ ( ScAL ) menu entry, configure the display reading. See
section 8 for a detail on the 2 points associated to scaling.
• at the ‘ Decimal point ’ (‘ dP ’) parameter configure the position for the
decimal point. Use key ‘ LE ’ (
3
) to move the decimal point position.
Press key ‘ SQ ’ (
<
) to validate.
• at the ‘ Display low ’ (‘ d.Lo ’) parameter configure the reading
associated to an input signal low of 4 mA. Input signal low can be
modified by using the ‘ field correction ’ function (see section 13.2) or by
direct configuration of ‘ input low ’ parameter (see section 13.5).
• at the ‘ Display high ’ (‘ d.hI ’) parameter configure the reading
associated to an input signal high of 20 mA. Input signal high can be
modified by using the ‘ field correction ’ function (see section 13.2) or by
direct configuration of ‘ input high ’ parameter (see section 13.5).
0 to 100
Scaling Decimal point
Display low
Display high
Field correction Correction low
Correction high
Wait for 3 seconds
Wait for 3 seconds
13.2 Field correction
At the ‘ Field correction ’ ( F.cor ) menu entry, access the ‘ field correction ’
functions. Use the ‘ field correction ’ functions to associate the actual
input signal at terminals, to the ‘ display low ’ or ‘ display high ’ display
values. See section 8 for a detail on the 2 points associated to scaling.
• at ‘ Correction low ’ ( F.Lo ) press key ‘ SQ ’ (
<
) to activate the function.
The display reads ‘ wait ’ while performs the reading of the actual input
signal value and associates this value to the ‘ input low ’ parameter.
When finished, the instrument goes back to the ‘ Correction low ’ ( F.Lo )
menu entry.
• at ‘ Correction high ’ ( F.hI ) press key ‘ SQ ’ (
<
) to activate the function.
The display reads ‘ wait ’ while performs the reading of the actual input
signal value and associates this value to the ‘ input high ’ parameter.
When finished, the instrument goes back to the ‘ Correction high ’ ( F.hI )
menu entry.
Display Square root
Average filter
Steps
Left zeros
Memory of max.
Memory of min.
13.3 Display
The ‘ Display ’ ( dISP ) menu entry groups configuration parameters
associated to the display.
• activate the ‘ Square root ’ ( Sq.rt ) parameter to ‘ on ’ to apply a ‘ square
root ’ function to the reading. The instrument reads the input signal
value in milliamperes, and scales the reading as configured at the
‘ scaling ’ section. Then applies the ‘ square root ’ function to the scaled
value. The last action applies the filter values (‘ average ’, ‘ steps ’, etc)
and reads the final value on display. The ‘ square root ’ function is to be
applied when working with differential pressure flow meters.
• the ‘ Average filter ’ ( AVr ) applies a recursive filter upon the reading
values, in order to reduce oscillations due to noisy signals. Configure
the filter strength between ‘0’ and ‘100’. The filter is stronger with
higher values. Value ‘0’ disables the filter. Increasing the strength of
the filter slows the reading.
• the ‘ Steps ’ ( StEP ) function configures the reading to be done in steps
of 1, 2, 5, 10, 20 or 50 counts.
• the ‘ Left zeros ’ ( LZEr ) parameter activates the reading with active
left zeros.