CTT8 instruction manual IM302-U v2.3 pag. 4 / 8
PROGRAMMING OF THE DEVICE
When the device is switched on, on the display will flash the index of the internal software: later the device starts to
display the temperature read on the measure input.
To enter in the programming phase press the button SET for some second up to light the relative LED of signalling SET.
The settings are indicated in sequence like showed after; to go out of the programming phase without to modify the
values it’s necessary to press SET without to confirm with the ENTER key the data modified.
To modify the value or the status it’s necessary to use and keys and the ENTER key to store the modification.
The pressure of the ENTER key move automatically the programming at the successive function or value.
Selection of the HOLD function
This is the first function to set in the menu programming (SET): in this phase of programming the HOLD led switch on.
The Hold function allows to store the alarm condition that can be rearmed only manually with the RESET button when the
temperature are lower than the threshold set.
If this function is disabled it’s possible to rearm the ALARM with the RESET button even if the temperature is higher than
the threshold set, while the value of temperature come back under the threshold set the alarm will be automatically
deleted.
To set the Hold function it’s necessary to use the and keys:
OFF function disabled
ON function enabled
Press the ENTER key to confirm the operation.
Selection of the threshold of switch on and switch off ventilation
To program the threshold of enable and disable ventilation it’s necessary to select the modality of functioning ventilation.
Selection threshold of disable ventilation
The FAN led on, with fixed light indicates this phase of programming.
With and keys to select the value of temperature indicated on display.
Interval of programming: from -25°C up to the threshold of enable ventilation -1°C.
Confirm with ENTER.
Selection threshold of enable ventilation:
The fan led on, with flashing light indicates this phase of programming.
With and keys to select the value of temperature indicated on display.
Interval of programming: from disabling threshold +1°C up to 200 °C.
Confirm with ENTER.
Selection of the alarm and tripped threshold
The set phase of the alarm thresholds start from the programming for the measure channel number 1.
The ALARM led on indicates the programming of the alarm:
With and keys to select the value of temperature
Interval of programming: from -25°C up to the tripping threshold -1°C
Confirm with ENTER.
The TRIP led on indicates the programming phase of the tripping threshold.
With and keys to select the value of temperature
Interval of programming: from alarm threshold + 1°C up to 200°C.
Confirm with ENTER.
Selection of address network identification for the communication of the serial port (MODBUS-RTU protocol)
Note: This setting is not significant for the models without the serial interface installed.
This phase is indicated on displays where there is
value in definition on displays T1-T2-T3-T4,
ID on displays T5-T6-T7-T8
With and keys to select the number choice.
The range for value accepted is from 1 to 247.
Confirm with ENTER.
Selection of the baud rate
Note: This setting is not significant for the models without the serial interface installed.
This phase is indicated on displays where there is
BDR on displays T1-T2-T3-T4,
and the value to set on displays T5-T6-T7-T8.
With and keys to select the baud rate.
It’ possible to set the following values: 2,4 - 4,8 - 9,6 - 19,2 kbps.
Confirm with ENTER.
Set HOLD modality T1-T2-T3-T4 T5-T6-T7-T8
HOLD mode disabled
HLD Off
HOLD mode enabled
HlD ON
Set T1-T2-T3-T4 T5-T6-T7-T8
Set address network
001 ID
Set T1-T2-T3-T4 T5-T6-T7-T8
Baud rate: 19200
BDR 19.2
Baud rate: 9600
BDR 9.6
Baud rate: 4800
BDR 4.8
Baud rate: 2400
BDR 2.4
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