[ENG] 4.5. [DKSF 54.3 IU] Configuring Top and Bottom Margin of a Safe Range of a Temperature Sensor
To configure a top and a bottom thresholds of a safe range of a temperature sensor, there is a need to go to the page «TEMPERATURE» of a device web interface:
Top Margin of Safe Range, °C – is a field for setting a top threshold of a temperature range for each temperature sensor. A temperature range is used to indicate Температурный диапазон используется для указания условий отправки SNMP TRAP сообщений, SYSLOG сообщений и сообщений, отправляемых в системный журнал устройства, а также e-mail и SMS-уведомлений в устройствах со встроенным GSM модемом. По умолчанию: 60.
Bottom Margin of Safe Range, °C – is a field for setting a bottom margin of a safe temperature range for every temperature sensor. A temperature range is used for indicating conditions of sending SNMP TRAP notifications, SYSLOG notifications and messages that are sent to a system log of a device, as well as e-mail and SMS notifications in devices with a built-in GSM modem. On default: 10.
To prevent frequent triggering of a top and bottom margins of a safe range, a switching hysteresis of 1°C is used.
A hysteresis sets a «corridor» near the specified temperature, within the limits of which top and bottom margins of a safe range do not react to temperature fluctuations. This function allows avoiding frequent accidental notifications from a temperature sensor that are caused by natural spontaneous fluctuations of a temperature measured by a sensor. If a current status of a temperature sensor is «above safe», then the threshold for switching a status is a specified temperature decreased on a hysteresis value. And, vice versa, if a current status is «below safe», a threshold for switching is a specified temperature increased for a hysteresis value. As soon as a temperature reaches the threshold value (considering a hysteresis value) in its rising or falling thus leaving the margins of a «corridor», a status of a temperature sensor is changed. Operation logic is explained in the picture below.
Status – represents a current status of a temperature sensor. Possible values are:
- Fail – a temperature sensor is not connected or does not respond;
- Normal – a temperature sensor responds, and a temperature value is within the margins of a specified range for this temperature sensor;
- Above Safe – a temperature sensor responds, and a temperature value exceeded a value of a specified range for this temperature sensor;
- Below Safe – a temperature sensor responds, and a temperature value is below the specified range for this temperature sensor
After saving the settings, there is a need to save parameters by clicking the button «Apply changes».