TECNOLOGIC spa - TLK 43
- OPERATING INSTRUCTIONS - Vr.02 - ISTR 06267 - PAG. 5
Tecnologic S.p.A. and its legal representatives do not assume
any responsibility for any damage to people, things or animals
deriving from violation, wrong or improper use or in any case
not in compliance with the instrument’s features.
3.4 - ELECTRICAL WIRING DIAGRAM
4 - FUNCTIONS
4.1 – MEASURING AND VISUALIZATION
All the parameters referring measurements are contained in the
group
“
]
InP”.
By using par.
“HCFG”,
it is possible to select the input signal type
which may come: from a thermocouple (tc), a thermo-resistance or
a thermistor (rtd), from a transducer with normalised analogue
signal in current (I) or tension (UoLt) or also from a signal coming
from the communication serial line of the instrument (SEr).
Once the signal type has been selected, it is necessary to set the
type of input probe on par.
“SEnS”,
which can be :
- for thermocouples J (J), K (CrAL), S (S), B (b), C (C), E (E), L (L),
N (n), R (r), T (t) or for infrared sensors serie TECNOLOGIC IRS – A
range - with linearization J (Ir.J) or K (Ir.CA)
- for thermoresistances Pt100 IEC (Pt1) or thermistors PTC KTY81-
121 (Ptc) or NTC 103AT-2 (ntc)
- for normalised signals in current 0..20 mA (0.20) or 4..20 mA
(4.20)
- for normalised signals in tension 0..50 mV (0.50), 0..60 mV (0.60),
12..60 mV (12.60), 0..5 V (0.5), 1..5 V (1.5), 0..10 V (0.10) or 2..10 V
(2.10).
We recommend that the instrument be switched on and off
whenever these parameters are modified, in order to obtain a
correct measurement.
For the instruments with input for temperature probes (tc, rtd) it is
possible to select the unit of measurement (°C, °F) through par.
“Unit”,
and the desired resolution (0=1°; 1=0,1°) through par.
“dP”
.
Instead, with regards to the instruments with normalised analogue
input signals, it is first necessary to program the 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).
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).
In case of measurement error, the instrument supplies the power as
programmed on par.
“OPE”.
This power will be calculated according to cycle time programmed
for the PID controller, while for the ON/OFF controllers the cycle
time is automatically considered to be equal to 20 sec. (e.g. In the
event of probe error with ON/OFF control and “OPE”=50, the control
output will be activated for 10 sec., then it will be deactivated for 10
sec. and so on until the measurement error remains.).
By using par.
“InE”
it is also possible to decide the conditions of the
input error, allowing the instrument to give the power programmed
on par. “OPE” as output.
The possibilities of par. “InE” are :
= Or : the condition occurs in case of over-range or probe breakage
= Ur : the condition occurs in case of under-range or probe
breakage
= Our : the condition occurs in case of over-range or under-range or
probe breakage
Using par.
“diSP”,
located in the group
“
]
PAn”,
it is possible to set
normal visualization of the SV display which can be the active Set
Point (SP.F), the control power (Pou), the Set Point operating when
there are active ramps (SP.o) or alarm threshold AL1, 2 or 3 (AL1,
AL2 or AL3).
4.2 - OUTPUT CONFIGURATION
The instrument’s outputs 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 :
= 1.rEG : Main control output
