English
- 24 -
CHRONOS RF Radiofrequency digital chronothermostat User Manual
REGULATION TYPE
The Chronos has got two types of regulation:
• ON/OFF regulation
During
ON/OFF
regulation the chronothermostat measures once a minute the
environment temperature and it carries out the regulation on the basis of the
following logic:
relay ON
SET-DIFF
SET
relay OFF
Temperature
increasing
relay ON
SET+DIFF
SET
relay OFF
Temperature
increasing
heating mode
cooling mode
where SET represents the setpoint and DIFF the hysteresis (useful to avoid
continuous switches on/switches off dangerous for the system in proximity to the
reaching of the setpoint).
• Proportional regulation (only in heating)
In heating mode, the on/off regulation is available and also the
proportional
regulation which in some systems allows a more precise regulation to obtain a
constant temperature.
This regulation requires to specify two parameters:
- the band, which represents the temperature values with whom to perform the
proportional regulation. The band is centered on the setpoint and it can have
values between 0.5°C and 5°C; outside these values the heating will be always
on (if setpoint-band > environment temperature) or always off (if se band
< environment temperature).
- The regulation period which represents the duration of the regulation cycle
(activation time + deactivation time of heating) and it can have values of 10, 20
or 30 minutes.
During the operating, at the beginning of the regulation period, the instrument
measures the environment temperature and it compares it with the programmed
setpoint; on the basis of this difference the activation time is calculated (and
consequently the deactivation time). The more the measured temperature is next
Summary of Contents for Chronos RF Bianco
Page 33: ......
