SPH
Temp.
r.Hd
time
Pr1
r.tC
SP
r.d
SPE
r.Ed
r.tC
"Turbo"
"Norm."
"ECO"
i.Et (1)
i.tt (2)
"Turbo"
(1) - The time i.Et is reset every time the door is opened and in the
case shown the door is always closed.
(2) – The time i.tt stops when the door is opened and the
instrument immediately switches to "Turbo" mode. In the case
shown, the door is always closed.
When switched on, the instrument starts in the mode it was in
when it was switched off ("Normal" or “Eco”) unless the
temperature at switch-on is > SPE+r.Ed. In this case (see fig.) a
"Turbo" cycle is automatically initiated.
After time “r.tC” the instrument automatically enters "Normal"
mode.
If the door is opened frequently the instrument stays in "Normal"
mode. If however it is not opened for time “i.Et” it automatically
switches to "Eco" mode.
The instrument remains in "Eco" mode until the door is opened
again or, if set, until the time-out “i.tt”.
On leaving "Eco" mode the instrument therefore runs a "Turbo"
cycle to allow product temperature to be restored, after which it
reverts to "Normal" mode and so on.
When “turbo” mode is on, this is indicated by the characters
“trb”
shown on the display, alternating with the normal display.
The Set point "SP" can be set with a value between the
programmed value in parameter.
“S.LS”
and the programmed
value in parameter
“S.HS”.
The Set point "SPE" can be set with a value between the
programmed value in parameter.
“SP”
and the programmed value
in parameter
“S.HS”.
The Set point "SPH" can be set with a value between the
programmed value in parameter.
“S.LS”
and the programmed
value in parameter
“SP”.
Note:
in the examples that follow, the Set point is generally
indicated as "SP" and the histeresis as “r.d”, how when operating
the instrument will work according to the Set point and histeresis
selected as actives.
4.3 - MEASURING AND DISPLAY
Via the parameter
“i.SE”
it is possible to select the type of probes
that one wishes to use and which can be: thermistores PTC
KTY81-121 (
Pt
), NTC 103AT-2 (
nt
) or Pt1000 (
P1
).
Via the parameter
“i.uP”,
it is possible to select the temperature
unit of measurement the desired measurement resolution (
C0
=°C /
1° ;
C1
=°C / 0.1° ;
F0
= °F / 1°;
F1
= °F / 0.1°).
The instrument allows the measuring to be calibrated, that can be
used for re-calibrating the instrument according to application
needs, through the parameters
“i.C1”
(for the input Pr1),
“i.C2”
(for the input Pr2) and
“i.C3”
(for the input Pr3).
The functions carried out by Pr2 and Pr3 probes is defined by the
parameters
“i.P2”
and
“i.P3”
This parameters can be configured for the following functions:
= EP
- Evaporator probe: used to managing the defrost and the
evaporator fans (see relative functions)
= Au
- Auxiliary probe
= dG
- Digital input (see Digital input functions)
If probe Pr2 and/or Pr3 is/are not used, set the relative parameter
“i.P2”
and/or
“i.P3”
= oF.
It is not possible to program the two parameters for the same func-
tion. (priority goes to i.P2)
Using the parameter
“i.Ft”,
it is possible to set the time constant
for the software filter for measuring the input values to be able to
reduce the sensitivity to measurement disturbances (increasing the
time).
Through the parameter
“i.dS”,
it is possible to fix the normal
visualisation on the display that can be the measurement of the
probe Pr1 (P1), the measurement of the probe Pr2 (P2), the
measurement of the probe Pr3 (P3), the active set point value (SP),
the label “Eco” when the instrument is in Eco mode (Ec) or it can
have the numerical display switched off (oF).
Through the parameter
“i.CU”,
it is possible to program an measu-
re offset that will be applied to the temperature show on the display
(only if i.dS”= P1, P2, P3, Ec).
The normal visualisation on the display is established by par.
“i.dS”, but it is possible to visualise all the variables and the highest
and lowest Pr1 peak measurement values in rotation by quickly
pressing and releasing key
U
.
The display will alternately show the code that identifies the
variable and its value.
The variable are:
“Pr1”
- Pr1 temperature
“Pr2”
- Pr2 temperature
“Pr3”
- Pr3 temperature ( on/oF state if is progr. as digital input )
“
Lt”
and the lowest Pr1 peak temperature
“Ht
” and the highest Pr1 peak temperature
When the instrument is switched off, peak values are always
re-set. However, it is also possible to reset these values if the
instrument is switched on by using the DOWN key hold for 3 sec.
during peak visualization.
The display will show “---” and peak memory will be reset.
The exit of this visualisation mode occurs automatically 15 seconds
after the last pressing on the key U.
Please remember that visualisation of the Pr1 probe can be
changed by the defrosting display lock function, by using the
parameter
“d.dL”
(see defrost function).
4.4 - DIGITAL INPUT
The digital input present on the instrument, alternative to Pr2 or Pr3
probe, accepts free voltage contacts, the function carried out is
defined by the parameter
“i.Fi”
and the action can be delayed for
the time set in parameter
“i.ti”.
If digital input is used, set the input relative parameter “i.P2” or
“i.P3” = dG.
The parameter “i.Fi” can be configured for the following functions:
= 0
- No function
= 1
-Cell door opening by contact normally open: on closing the
digital input the instrument visualises
oP
and the variable set in
parameter “i.dS” alternately on the display. With this function mode,
the action of the digital input also activates the time that can be set
in parameter "A.oA" after which the alarm is activated to signal that
the door has been left open.
= 2
-Cell door opening with fan stop by contact normally open: on
closing the digital input the fans are stopped and the instrument
visualises
oP
and the variable set in parameter “i.dS” alternately on
the display. With this function mode, the action of the digital input
also activates the time that can be set in parameter "A.oA" after
which the alarm is activated to signal that the door has been left
open and the fan restart.
= 3
- Cell door opening with compressor and fan stop by contact
normally open: similar to “i.Fi” = 5 but with fan and compressor
stop. At the intervention of the door open alarm alarm compressor
and fan restarts.
= 4
- External alarm signal by contact normally open: on closing
the digital input the alarm is activated and the instrument visualises
AL
and the variable set in parameter “i.dS” alternately on the
display.
= 5
- Signalling of external alarm with disablement of all the control
outputs by contact normally open: on closing the digital input all
the control outputs are disabled, the alarm is activated and the
instrument visualises
AL
and the variable set in parameter “i.dS”
alternately on the display.
ASCON TECNOLOGIC - Y33
- OPERATING INSTRUCTIONS - Vr. 01 - 04/16 - ISTR-MY33-ENG01 - PAG. 5