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XT220C – XT221C
Two Stages Digital Controllers
with Multi Probe Input
1.
GENERAL WARNING
1.1
PLEASE READ BEFORE USING THIS
MANUAL
•
This manual is part of the product and should be kept near the
instrument for easy and quick reference.
•
The instrument shall not be used for purposes different from those
described hereunder. It cannot be used as a safety device.
•
Check the application limits before proceeding.
1.2
SAFETY PRECAUTIONS
•
Check the supply voltage is correct before connecting the
instrument.
•
Do not expose to water or moisture: use the controller only within
the operating limits avoiding sudden temperature changes with
high atmospheric humidity to prevent formation of condensation
•
Warning: disconnect all electrical connections before any kind of
maintenance.
•
The instrument must not be opened.
•
In case of failure or faulty operation send the instrument back to the
distributor or to “DIXELL s.r.l.” (see address) with a detailed
description of the fault.
•
Consider the maximum current which can be applied to each relay
(see Technical Data).
•
Ensure that the wires for probes, loads and the power supply are
separated and far enough from each other, without crossing or
intertwining.
•
In case of applications in industrial environments, the use of mains
filters (our mod. FT1) in parallel with inductive loads could be
useful.
2.
GENERAL DESCRIPTION
The XT220C and XT221C are two-stage ON/OFF controllers
for temperature, humidity and pressure applications with direct
or inverse action, user-selectable. The analogue input type can
be set by parameter between the following, according to the
model:
-
PTC, NTC;
-
PTC, NTC, Pt100, Thermocouple J, K, S;
-
4÷20mA, 0÷1V, 0÷10V.
3.
FIRST INSTALLATION
3.1
PROBE SETTING
The pre-set probe type is
written on the label of the
instrument, see picture. If it is
different from the probe that
has be used, set the probe following procedure below
3.1.1 How to set the probe.
1.
Enter the programming menu by pressing the SET+
8
8
for 3s.
2.
Select the Pbc (Probe configuration) parameter and
push the SET key.
3.
Set the kind of probe:
a.
Controller for temperature: Pt= Pt100, J = J
thermocouple, c = K thermocouple, S = S
thermocouple; Ptc = PTC; ntc = ntc.
b.
Controller with current or voltage inputs:
cur=4÷20mA, 0-1= 0÷1V, 10= 0÷10V
4.
Push the SET key to confirm it.
5.
Switch the controller off and on again.
NOTE: Before proceeding check and, if necessary; set with
appropriate values the Minimum Set Points (LS1 e LS2) and
Maximum Set Points (US1 e US2). See also the paragraphs
concerning the programming.
4.
REGULATIONS
4.1
2 INDEPENDENT OUTPUTS (OUC=IND)
Two independent control stages (ouC=ind): output #1 at direct
(S1C=dir) or inverse (S1C=
in
) action; output #2 at (S2C = dir)
direct or inverse (S2C =in) action.
E.I. with OUC = ind, S1C = dir (cooling), S2C = dir (cooling).
4.2
2 DEPENDENT OUTPUTS (OUC=DIP)
With dependent control stages (ouC=diP) SET2 is related to
SET1:
therefore SET2 is: SET1+SET2
output #1 with direct or inverse action according to the S1C
parameter; output #2 with direct or inverse action according to
the S2C.
E.I. with ouC=diP (dependent), S1C = dir (cooling), S2C =
dir (cooling).
5.
FRONT PANEL COMMANDS
SET: To display and modify target set point1 and 2; in
programming mode it selects a parameter or confirm an
operation.
TO SWITCH THE INSTRUMENT ON/OFF: If the function
is enabled (par. onF=yES), by pressing the SET key for
more than 4s the controller is switched OFF. To switch the
instrument on again press the SET key.
9
9
UP: in programming mode it browses the parameter codes
or increases the displayed value. Hold it pressed for a
faster change
8
8
DOWN: in programming mode it browses the parameter
codes or decreases the displayed value. Hold it pressed
for a faster change
/
/
CLOCK To set the timer and to start/stop a cycle
KEY COMBINATIONS:
9
9
+
8
8
To lock & unlock the keyboard.
SET +
8
8
To enter in programming mode.
SET +
9
9
To return to the room temperature display.
5.1
USE OF LEDS
A series of light points on the front panels is used to monitor
the loads controlled by the instrument. Each LED function is
described in the following table.
LED
MODE
FUNCTION
ON
Output 1 enabled
ON
Output 2 enabled
LED1 Flashing - Programming Phase (flashing with LED2)
LED2 Flashing - Programming Phase (flashing with LED1)
LED3 Flashing - The cycle is running
ON
- ALARM signal
- In “Pr2” indicates the parameter is also
present in “Pr1”
5.2
TO SEE AND MODIFY THE SETPOINT1 (OR
SETPOINT2)
1.
Push and release the SET key, the
St1 label is displayed, push again the
SET key to see the value.
2.
To change the Set1 value push the
9
9
or
8
8
arrows
within 10s and confirm it with SET key.
3.
The St2 label is displayed, push the SET key to see the
value and use the
9
9
or
8
8
arrows within 10s to modify it.
EXIT: push the SET +
9
9
keys or wait for 15s without pushing
any keys.
5.3
HOW TO SET THE TIMER
Hold pressed the CLOCK key for 3s.
The duration (hh:mm) will be displayed.
Use the UP and DOWN keys to adjust it.
Confirm the value pushing again the SET key or waiting 10s.
5.4
HOW TO START A CYCLE
Push and release the CLOCK key.
The remaining time of the cycle will be displayed and the timer
is started.
5.5
CYCLE END
The end of the cycle is signalled by the “End” message on the
display and by the activation of the buzzer.
The buzzer go on noising till a key is pressed..
5.6
HOW TO MANUALLY STOP A CYCLE.
When a cycle is in progress push and release the CLOCK key.
The controller come back to display the temperature and the
timer is erased.
5.7
HOW TO CHANGE THE TIMER WHEN A CYCLE
IS RUNNING.
Hold pressed the CLOCK key for 3s, the remaining time starts
blinking.
Use the UP and DOWN keys to adjust it.
Confirm the value pushing again the SET key or waiting 10s.
5.8
HOW TO SEE THE TEMPERATURE DURING A
CYCLE
When the cycle is running, the controller displays the remaining
time to the end of the cycle.
Push the DOWN key, the temperature will be displayed for 5s.
5.9
POSSIBILITY OF SELECTING THE KIND OF
REGULATION: CONTINUOS OR ONLY DURING THE
CYCLE.
By means of the trM parameter the kind of regulations is set::
With trM = oFF the regulation is enabled only during the cycle.
With trM = on the regulation is always active, the cycle
consists of starting the timer and signalling when this is
expired.
5.10
TO ENTER THE PARAMETERS LIST “PR1
To enter the parameter list “Pr1” (user accessible parameters)
operate as follows:
1.
Push for 3s the SET +
8
8
keys (LED1 &
2 start blinking).
2.
The controller will display the first
parameter present in the Pr1 menu..
5.11
TO ENTER THE PARAMETERS LIST “PR2”
The “Pr2” parameter list contains the configuration parameters.
A security code is required to enter it.
1.
Enter the “Pr1” level, see above paragraph.
2.
Select “Pr2” parameter and press the “SET” key.
3.
The “PAS” flashing message is displayed, shortly followed
by “0 - -” with a flashing zero.
4.
Use
9
9
or
8
8
to input the security code in the flashing
digit; confirm the figure by pressing “SET”.
