ASCON TECNOLOGIC - TLI 40 - OPERATING INSTRUCTIONS -
PAG. 4
desired resolution on par.
“dP”
(0=1; 1=0,1; 2=0,01; 3=0,001) and
then, on par.
"SSC"
, the value that the instrument must visualise at
the beginning of the scale (0/4 mA, 0/12 mV, 0/1 V o 0/2 V) and, on
par.
"FSC",
the value that the instrument must visualise at the end
of the scale (20 mA, 50 mV, 60 mV, 5 V or 10 V).
Only for the instruments with potentiometer input, the parameters
"SSC" and "FSC" determines the measurement range and the
parameter
“0.Pot”
determines the zero value (inside the range
“SSC” ... “FSC”).
Always for the instruments with potentiometer input it is possible to
effect the input setting through auto-ranging (see functioning of key
“U”) in this case the values of the parameters "SSC", "FSC" and
"0.Pot" are automatically calculated by the instrument.
In the case of infrared sensors (TECNOLOGIC IRS-"A" range), by
programming the sensor as "Ir.J" or "Ir.CA", the par. "
rEFL
" is also
present and it allows the correction of possible measuring errors
caused by the environment lighting and by the reflectivity of the
material. This parameter should be programmed with a high value if
the material to be measured is particularly bright / reflective and
must be reduced if the surface is particularly dark / not reflective,
keeping in mind however that for most materials, the recommended
value is within 1.00 and 0.80.
The instrument allows for measuring calibration, which may be used
to recalibrate the instrument according to application needs, by
using par.
“OFSt”
and
“rot”.
Programming par. “rot”=1,000, in par. “OFSt” it is possible to set a
positive or negative offset that is simply added to the value read by
the probe before visualisation, which remains constant for all the
measurements.
If instead, it is desired that the offset set should not be constant for
all the measurements, it is possible to operate the calibration on
any two points.
In this case, in order to decide which values to program on par.
“OFSt” and “rot”, the following formulae must be applied :
“rot” = (D2-D1) / (M2-M1) “OFSt” = D2 - (“rot” x M2)
where:
M1 =measured value 1
D1 = visualisation value when the instrument measures M1
M2 =measured value 2
D2 = visualisation value when the instrument measures M2
It then follows that the instrument will visualise :
DV = MV x “rot” + “OFSt”
where: DV = visualised value
MV= measured value
Example 1: It is desired that the instrument visualises the value
effectively measured at 20° but that, at 200°, it visualises a value
lower than 10° (190°).
Therefore : M1=20 ; D1=20 ; M2=200 ; D2=190
“rot” = (190 - 20) / (200 - 20) = 0,944
“OFSt” = 190 - (0,944 x 200) = 1,2
Example 2: It is desired that the instrument visualises 10° whilst the
value actually measured is 0°, but, at 500° it visualises a 50° higher
value (550°).
Therefore : M1=0 ; D1=10 ; M2=500 ; D2=550
“rot” = (550 - 10) / (500 - 0) = 1,08
“OFSt” = 550 - (1,08 x 500) = 10
By using par.
“FiL”
it is possible to
program time constant of the
software filter for the input value measured, in order to reduce noise
sensitivity (increasing the time of reading).
Using par.
“diSP”,
located in the group
“
]
PAn”,
it is possible to set
normal visualization of the display which can be the measure (dEF)
or the alarm threshold AL1, 2, 3 or 4 (AL1, AL2, AL3 or AL4).
4.2 - PEAK VALUES MEMORIZATION AND HOLD FUNCTION
The instrument memorizes the highest and lowest peak
measurement values.
To visualize such values simply press the
UP
key to visualize the
highest peak or the
DOWN
key for the lowest peak during normal
operation of the instrument.
When the instrument is switched off, such values are always re-set.
However, it is also possible to re-set these values if the instrument
is switched on by using the U key that has been suitably
programmed (see par. U key with function "USrb" = r.Pic) or
through the suitably programmed digital input (see par. digital input
with function "dIF" = r.Pic).
Again, using the U key or the suitably programmed digital input, it is
possible to visualize the difference between the two peaks on the
display (see par. U key and digital input with function "USrb" = d.Pic
and "dIF" = d.Pic).
Besides the function of the peak values, the instrument also has a
HOLD function through which it is possible to lock the visualization
of the display on the measured value.
This function can be operated using the U key or the suitably
programmed digital input (see par. U key and digital input with
function "USrb" = Hold and "dIF" = Hold).
When the HOLD function is actived, the instrument works on the
alarms in operation depending on the memorized measurement.
4.3 - OUTPUT CONFIGURATION
The instrument’s outputs (if present) can be programmed by
entering the group of parameters
“
]
O1”, “
]
O2”, “
]
O3”, “
]
O4”
, where
different parameters (depending on the type of outputs –digital or
analogue- available on the instrument) are located.
Note:
In the following examples, the number of outputs is
generically indicated with
n
- DIGITAL OUTPUTS relay or SSR type :
Within the selected group only the par.
“OnF”
will be present
.
This parameter can be set for the following functions :
= ALno : Alarm output normally open
= ALnc : Alarm output normally closed
= OFF : Output deactivated
The coupling [outputs number – alarms number] can be effectuated
in the group relative to the alarm (“
]
AL1”,”
]
AL2”, “
]
AL3” or “
]
AL4”).
- ANALOGICAL OUTPUTS 0/4..20 mA or 0/2..10 V (only OUT1):
The parameter
“Aor1”
will present within the group “
]
O1”, with which
it is possible to set the beginning of the scale used for the output.
This parameter will therefore be set at:
= 0 : if one intends to use the beginning of the scale as equal to 0 (0
mA if the output is 0/4...20 mA, or 0 V if the output is 0/2...10 V)
= no_0 : if one intends to use the beginning of the scale other than 0
(4 mA if the output is 0/4...20 mA, or 2 V if the output is 0/2...10 V)
The parameter
“Ao1F”
will be present by which it is possible to
configure the function of the analogical output as:
= r.inP : measurement retransmission output
= r.SEr : output led by serial communication line of the instrument
= OFF : deactivated output
In the case that the analogical output function should be configured
for the retransmission of the signal, it is therefore necessary to
programme another two parameters which set the minimum and
maximum reference values.
Therefore, in these cases, set the parameter
"Ao1L"
with the value
that the instrument must provide the minimum value (0/4 mA or 0/2
V) in output and the value to which the instrument must provide the
maximum value (20 mA o 10 V) to the parameter
"Ao1H"
in output.
4.4 – ALARM FUNCTION (AL1, AL2, AL3, AL4)
4.4.1 – ALARM OUTPUT CONFIGURATION
The alarms depend on the measured value (AL1, AL2, AL3, AL4)
and before setting them to work, it is necessary to know which
output the alarm has to correspond to.
First of all it is necessary to configure in the groups of parameters
“
]
O ”,
the parameters relative to the outputs required as alarm
(“O1F” , “O2F” ,“O3F” ,“O4F”),
programming the parameter relating
to the desired output as follows :
= ALno
if the alarm output has to be ON when the alarm is active,
while it is OFF when the alarm is not active
= ALnc
if the alarm output has to be ON when the alarm is not
active, while it is OFF when the alarm is active
Note:
In the following examples the alarm’s number is generally
indicated as
n
Access the group
“
]
ALn”,
relating to the alarm to be set and
program which output the alarm signal must be sent to on par.
“OALn”
.
The alarm functioning is instead defined by parameters :
"ALnt "
– ALARM TYPE
