ETC-1-AL-DLW is an electronic digital thermometer with a large, easy to read LED display used to control and measure temperature in buildings. Communication between the thermometer and TEMP-201 sensors is digital and bidirectional what enables continuous control of its operation correctness. The ETC-1-AL-DLW thermometer activates alarms in case of exceeded limit values of temperature (temperature too low/too high) and in case of detecting any irregularities in the thermometer’s operation that might cause its incorrect operation. In order to activate an alarm a relay alarm output with three brought out contacts is used: normally open (NO), normally closed (NC) and common (C). A relay coil is not supplied at alarm condition and, as a result, it enables to generate an alarm in case of thermometer’s power supply failure.

An alarm is activated in the following situations:

• exceeding the set limit values of temperature (temperature too low/too high),

• detection of temperature measurement line damage,

• halting the process of temperature monitoring,

• detection of irregularities in thermometer’s operation (e.g. an internal memory failure),

• a failure in the thermometer’s power supply.

Characteristics:

• temperature measurement is made by means of digital sensors; the possibility of connection of up to 4 TEMP-201 sensors, one sensor is included in the set,

• the possibility of control of average temperature value or min/max value from each of temperature sensors,

• an option of automatic switch off of alarm signalling after disappearing of its reason.

The device is designed for mains 230V, 50Hz or with 12 V DC (e.g. from alarm installation in the building). It is possible to connect it to both voltage sources at the same time.