AKOGAS configuration

The AKO-575xxx / AKO-575xxxN / AKO-575xxxV gas transmitters have a series of parameters to configure their operation according to requirements, these parameters can be modified through AKONET.cloud, by accessing the device details and by clicking on the "Parameters” tab.

Changes to the parameters associated with AKONET.cloud have immediate effect, while the parameters associated with the device generate a task that runs in the next transmission (variable depending on configuration). Refer to the device manual to force the transmission.

Narrow Band (nb) (Only AKO-575xxxN / AKO-575xxxV)

Initial transmission hour (GMT+0): Sets the time of day when the first transmission starts. The transmission interval is counted as from this point.

Datalogger (dlG) (Only AKO-575xxxN / AKO-575xxxV)

Data logger week initial day: Sets the day of the week on which a new log block is started.

Interval of the continuous log: Sets the frequency interval with which the device records gas concentration data, i.e. how often the device measures and saves the data.

• 5 minutes: Saves the gas concentration data every 5 minutes

• 15 minutes: Saves the gas concentration data every 15 minutes.

• 30 minutes: Saves the gas concentration data every 30 minutes

• 1 hour: Saves the gas concentration data every 60 minutes.

Alarm configuration (AL)

Early leak detection warning example

Parameters:

• Early detection warning (EDW): Enabled

• Level of early detection warning (EDW): 150 ppm

• Early detection warning (EDW) differential: 50 ppm

• Early detection warning (EDW) delay: 3 min

• Severity for EDW: Medium

• Rapid variation of concentration*: 30 ppm

• Delay of rapid variation of concentration: 10 min

At point 1, the concentration increases by 30 ppm in less than 10 minutes, but the warning is not activated as 150 ppm are not exceeded.

At point 2, the concentration increases by 30 ppm in less than 10 minutes and 150 ppm are exceeded, but the warning is not activated because there is a 3 minute delay.

At point 3, the warning is activated, once 3 minutes have elapsed from point 2.

Basic configuration (bcn)

Type of gas to be measured: Informs about the type of gas measured by the sensor (not configurable).

Visualization type: Defines what is shown on the transmitter's display:

• PPM: Shows the current gas concentration

• GAS: Shows the type of gas measured by the transmitter

Minimum value to be shown: Defines the minimum value that must be detected by the transmitter so as to be shown on the display. Lower values detected are shown as 0 ppm.

Measurement with Broadband sensor: Selects the refrigerant gas measured to be configured (Only in AKO-575400 / AKO-575400N transmitters).

Access code: Defines an access code to access certain functions of the transmitter from its keypad (See “Function of acces code”)

Function of access code : Defines the lock with access code function:

• Disabled: The access code function is disabled.

• Access to parameters disabled: The access code is requested when trying to access the parameter configuration.

• Keypad disabled: The access code is requested for any keypad function.

Acoustic alarm: Enables / Disables the transmitter's acoustic alarm.

Function of mute key: Defines the function of the Mute key:

• Disabled: The mute function is disabled.

• Only acoustic: If there is an alarm, the mute key only silences the acoustic alarm.

• Only relay: If there is an alarm, the mute key only deactivates the alarm relay.

• Acoustic and relay: If there is an alarm, the mute key silences the acoustic alarm and deactivates the alarm relay.

MODBUS address: Defines the transmitter's MODBUS address.

MODBUS speed: Defines the transmitter's MODBUS speed.

Inputs and outputs (InO)

Polarity of digital input 1 (Remote mute): Defines the polarity of digital input 1 (Remote mute function):

• Normaly closed: The function is activated when the contact opens.

• Normaly cpen: The function is activated when the contact closes.

Polarity of digital input 2 (Set Hold): Defines the polarity of digital input 2 (Set Hold function):

• Normaly closed: The function is activated when the contact opens.

• Normaly cpen: The function is activated when the contact closes.

Type of 4/20 mA output: Informs about the type of output configured on the transmitter:

• Tabulated: The output is calibrated to operate with AKOGAS and AKOALARM alarm stations.

• Linear: The output is linear, 4 mA= 0 ppm, 20 mA= Full scale.

Cloud alarms (c-AL)

Calculate LCI & LPI: Enables / Disables the calculation of the LCI (leak charge index) and LPI (leak potential index).

Transmitter location: Defines the installation location of the transmitter, and the zone volume. If the most suitable option cannot be found, select the option “customised volume” and introduce the value in the “Volume of the location customized” parameter.

Volume of the location customized: Allows for the volume (in m3) of the zone where the transmitter is installed to be customised (See previous parameter).

Gas charge: Defines the gas charge of the facility in kg.

Refrigerant: Defines the type of refrigerant present in the facility. If the refrigerant used is not on the list, please contact AKO customer service.

Severity for communication error: Defines the severity of the communication error:

• Unassigned: Severity unassigned, the communication error is displayed in grey.

• Low: Low severity, the communication error is displayed in yellow.

• Medium: Medium severity, the communication error is displayed in orange.

• High: High severity, the communication error is displayed in red.

LCI Alarm: Defines what percentage of leaking gas charge (% of the total per year) activates the LCI alarm.

LCI hysteresis: Defines the hysteresis for the LCI alarm.

Severity of LCI alarm: Defines the severity of the LCI alarm:

• Unassigned: Severity unassigned, the Pre-Alarm is displayed in grey.

• Low: Low severity, the Pre-Alarm is displayed in yellow.

• Medium: Medium severity, the Pre-Alarm is displayed in orange.

• High: High severity, the Pre-Alarm is displayed in red.

LPI Alarm: Defines what annual quantity (kg) of leaked refrigerant gas activates the LPI alarm.

LPI hysteresis: Defines the hysteresis for the LPI alarm.

Severity of LPI alarm: Defines the severity of the LPI alarm:

• Unassigned: Severity unassigned, the Pre-Alarm is displayed in grey.

• Low: Low severity, the Pre-Alarm is displayed in yellow.

• Medium: Medium severity, the Pre-Alarm is displayed in orange.

• High: High severity, the Pre-Alarm is displayed in red.

Leak potential index (LPI)

Taking into account a detected leak, the LPI it estimates the projection, in kg, of gas charge that would be lost in the period of one year (if no action is taken).

The LPI (Leakage Potential Index) is an indicator calculated on akonet.cloud that, in the event of a leak, enables the estimation of the severity thereof (measured in kg of refrigerant gas per year). This calculation is necessary given that the correlation between the severity or strength of the leak (in kg/year) and the level of gas concentration (as a consequence of the leak) is not linear, and it depends on several factors; mainly on the expansion space of the refrigerant gas (size of the transmitter's location), use of the expansion space (quality of closures, transit, etc.) and density of the refrigerant gas, among others. For calculation, it is necessary to activate the function in the Cloud Alarms tab and fill out the “Transmitter location”, “refrigerant” and “gas charge” parameters if it is necessary to calculate the LCI as explained below. The LPI estimates the projection of the leak (in kg/year of refrigerant gas) detected in real time by the AKOGAS system. That is, assuming that the leak is continuous during the following year and is not repaired. This value provides an indication as to the significance thereof and enables decisions to be made with regards to its repair: whether it is necessary, its urgency and its economic and operative impact, regardless of the level of concentration observed by the transmitter of the AKOGAS system.

Leakage charge index (LCI)

Taking into account a detected leak, it estimates the projection, as a percentage of the gas charge of the whole facility, that would be lost in the period of one year (if no action is taken).

The LCI (Leakage charge Index) is to measure the % of the facility's total refrigerant gas charge that represents the calculated LPI, that is, the relative significance of the leak on the refrigeration system. When LCI is 100%, it indicates that as a result of the detected leak all of the refrigerant at the facility will escape in the following year.

Alarms can be set based on both indices (LPI and LCI), to generate notifications in the event that the leak detected exceeds a limit value of (kg/year) or of (% of total charge/year), respectively.