Basic Operations; Adjusting The Desired Temperature; Functions Lock; Control Functions Shutdown - Full Gauge Controls MT-543e plus Instruction Manual

6.3 Basic operations

6.3.1 Adjusting the desired temperature

To enter the setpoint adjustment menu, press
easy access key (item 6.1). The message [Sp1,] and then the value to adjust the setpoint of stage 1
< >
will be displayed in sequence. Use the or
- If stage 2 is configured to operate as refrigeration controlled by SP2 (F08=0) or heating controlled by
SP2 (F08=1), the message [Sp2,] will be displayed afterwards. Use the
/
change the value and press to confirm.
- If stage 3 is configured to operate as refrigeration controlled by SP3 (F13=0) or heating controlled by
SP3 (F13=1), the message[SP3,]will be displayed afterwards. Use the
/
change the value and press to confirm.
- If stage 4 is configured to operate as refrigeration controlled by SP4 (F30=0) or heating controlled by
SP4 (F30=1), the message[SP4,]will be displayed afterwards. Use the
/
change the value and press to confirm.
If the 3rd stage is configured as a cyclical timer (F13 = 2) or minimum ventilation (F13 = 3), the
adjustment of the time of the cyclical timer of the 3rd stage on ([Con,]) and the time of the cyclical
timer of the 3rd stage off ([Coff]). will be possible. The adjustment of alarm on ([tOn,]) and off
([tOff])times will be allowed if stage 4 is configured as alarm (F30 = 2, 3, or 4).
Finally the indication [----]is signaled concluding the configuration.

6.3.2 Functions Lock

The use of the functions lock brings greater security to the operation of the instrument. The setpoint and
other parameters can be visible to the user when active, but they are protected against undue changes
(F42=2) or only block changes to the control functions and leave the adjustment of the setpoint enabled
(F42=1). To activate the functions lock, access[LOC,]in the quick access menu. The message
[no,,](lock must be enabled and deactivated) will be displayed. When the message is being display
>
press and hold for the time configured in (F43) for the functions to be locked. The activation will be
indicated by the message [LOC,][On,,]. To enable the use of this function, F42 must be configured
with 1 or 2.
When trying to change the parameters, the [LOC,] message shown in the display indicates that the
functions lock is active, to deactivate it, turn the controller off and then turn it on again with the
held down. Keep the key held down until the [LOC,][OFF,] message indicates the unlocking (10
seconds).

6.3.3 Control Functions Shutdown

Turning the control functions off allows for the controller to operate just as an indicator of temperature,
keeping the control outputs and the alarms disconnected. Use of this feature is enabled or disabled by
the control functions shutdown (F44) function. When enabled, the control and alarms functions are
turned off ([CTRL][OFF,]) or on ([CTRL][ON,,]) through the quick access menu in the option
[CTRL]. When the control functions are off the message [OFF,]will then be displayed alternately
with the temperature and the other messages.
6.3.4 Minimum and maximum temperature record
The display of minimum and maximum temperature records can be checked through the quick access
<
menu or by pressing the key. The minimum and maximum temperatures recorded will be displayed
in sequence. To erase the minimum and maximum values recorded, keep the
seconds while the records are being displayed or use the option [Creg] in the quick access menu.
The message [rset] indicates that the records were erased.
6.3.5 Selection of units
To select the units the system will use to operate, press
temperature is being displayed, enter the function [,F01] using the access code [,231] and then
/
. Then select the desired unit [,=C,] or [,=F,] using the
press
Whenever the units are changed, the functions' configuration assumes the factory default, so they need
to be configured again.
6.3.6 Selection of the type of sensor
It is required when you want to change the type of sensor connected to the controller. You can choose
the NTC thermistor or PT-100.
To select the type of sensor that the system will use to operate, press
touch) while the temperature is being displayed, enter the function [,F01] using the access code
/
[,312] and then press . The message [Sens]will be displayed, then select the desired sensor
type[,ntc] (thermistor NTC) ou [pt01](thermistor PT-100*) using the
/
press to confirm. Whenever the type of sensor is changed, the configuration of the functions
assumes the factory default, so they need to be configured again.
6.3.7 Sensor Connection
The NTC or PT100* sensors must be connected according to the picture below.
5 6 7 8
1 2 3 4
NTC
PT-100*
* This sensor is sold separately.
6.3.8 Audible alarm and alarm output inhibitor
To inhibit the alarm output OUT4 and / or the audible alarm (buzzer), when they are active, press
2 seconds. In this case, if OUT4 and buzzer are active, they will both be inhibited.
It is also possible to inhibit the alarm or buzzer through the option [inib] in the quick access
where it is possible to choose the individual alarm to be inhibited ([Out4] or [bu22]) using the
> /
keys and pressing .
6.3.9 Stages
e
MT-543 plus
controller has four stages.
Stages 1 and 2 work only as refrigeration or heating.
/
for 2 seconds until [Set,]is displayed or use the
/
keys to change the value and press to confirm.
< >
or keys again to
< >
or keys again to
< >
or keys again to
<
key pressed for 2
< >
and simultaneously while the
< >
or keys, and press
< >
and simultaneously (quick
< >
or
Table of wire gauge / distance ratio.
Diameter Máx. dist.
(AWG) (mm) (metros)
14 1.63 18.1
16 1.29 11.4
18 1.02 7.2
20 0.81 3.0
22 0.64 1.9
24 0.51 1.8
26 0.40 1.1
Besides operating as refrigeration or heating, Stage 3 can act as a cyclical timer or minimum ventilation.
It has five operating modes when configured as cyclical timer:
- Independent (F22=0): the timer cycles are according to the times configured in F20 ([COn,]) and
F21 ([COff]).
- Timer triggered by SP1 (F22=1): the timer is triggered whenever the temperature reaches the value
configured for SP1. The timer switches off when the temperature reaches SP1 + F06 (if stage 1 is
configured as refrigeration) or SP1 - F06 (if stage 1 is configured as heating), as shown in Figure 1.
- Stage 1 linked to the cyclical timer (timer switches on upon power up) (F22=2): in this
configuration, the timer cycles according to the times configured in F20 ([COn,]) and F21 ([COff]) .
The Stage 1 starts to cycle when the temperature reaches SP1 + F06 (if stage 1 is configured as
refrigeration) or SP1 - F06 (if stage 1 is configured as heating), as shown in Figure 1.
- Stage 1 linked to the cyclical timer (timer off upon power up) (F22=3): The operation is similar to
the previous configuration. The difference in this configuration is that the timer starts off.
- Cyclical timer output is on whenever stage 1 output is on (F22=4): in this operating mode timer
cycles according to the times configured in F20 ([COn,]) and F21 ([Coff]) and stage 3 stops
cycling and keeps the output switched on, whenever stage 1 output switches on, as shown in Figure 3.
- Cyclical timer output cycles whenever stage 1 output is on (F22=5): stage 3 will cycle only when
stage 1 output is on, observing the times configured in F20 ([COn,]) and F21 ([COff]), as shown in
Figure 4.
Cooling
Temperature [°C]
OUT1
>
key
Cyclical
timer
Cooling
Temperature [°C]
OUT1
Cyclical
timer
Stage 3 configured as minimum ventilation; it will act together with stage 1 (configured for heating) in
systems that require minimum ventilation. Functioning as follows: when the temperature is between
SP1 and SP1-F06 or between SP1 and SP1+F16, stage 3 will cycle according to the times configured in
F20 ([COn,]) e F21 ([Coff]). If the temperature is below SP1-F06, the ventilation is switched off,
and if the temperature is higher than SP1+F16, the ventilation remains on, and stays in this condition
until it reaches the setpoint again, as shown in Figure 5.
/
.
Heating
Temperature [°C]
keys, and
OUT1
Ventilation
Like in the previous stages, stage 4 can also be configured as refrigeration or heating. It can also
operate as an in-range alarm, relative out-of-range (F30 = 2, 3, and 4).
6.3.10 Soak Function
In the soak function mode (F45=1) up to five different setpoints can be configured to act for different
times in output OUT1. The first desired setpoint (SSP1) is configured in function F46 and the time in
minutes the controller must remain in this setpoint (F47), as well as the sequential setpoints (SPS2,
SPS3, SPS4, and SPS5) in functions (F48, F50, F52 e F54), and respective permanence times (F49,
F51, F53 e F55).
Temperature
>
for
SSP3
;
,
SSP2
<
or
SSP1
Buzzer
Cooling
Temperature [°C]
Setpoint + Hysteresis
Setpoint
Setpoint - Hysteresis
Time [S]
OUT1
Cyclical
timer
Figure 1
Cooling
Temperature [°C]
Setpoint + Hysteresis
Setpoint
Setpoint - Hysteresis
Time [S]
OUT1
Cyclical
timer
Figure 3
Time in SSP3
Time
in SSP2
Time in SSP1
Setpoint + Hysteresis
Setpoint
Setpoint - Hysteresis
Time [S]
Figure 2
Setpoint + Hysteresis
Setpoint
Setpoint - Hysteresis
Time [S]
Figure 4
SP1 + F16
Temperature
SP1
SP1 - F06
Figure 5
Time [min]