Select via „Modify“ the menu item „Switch point clock (Update)“.
A second switch point clock can be defined in the meter (with FW 5.10 of A1350, FW 7.00 of A220 and the FW of AS220/AS253/AS1253/A1440.). At a predefined date the second tariff table will be activated and valid for the rest of the time. All data have to be defined in the same way as the first switch timetable.
7.4.1 Day type
Select via „Modify“ the menu item „Switch point clock (Update)“ -> „day type”.
Image 7.4-1: Second tariff table
Date of update
7.5 Times
Select via „Modify“ the menu item “Times”. Different possibilities to change the time base or
communication timeout are offered: 7.5.1 Source of Times
Select via „Modify“ the menu item „Times” -> „Source of time”.
Image 7.5-1: Real time clock
In this menu the user can define whether the network frequency or the quartz frequency is supposed to be used for the time of the internal real time clock of the meter.
Notes:
• In general, the setting „quartz“ is to be recommended because the quartz inserted are highly exact and temperature stable (< 5 ppm).
• Especially in use of a DCF-synchronization of the measuring period is it recommended to select the setting „quartz“. This is because the network frequency can vary and it can lead therefore to undesirable „time set“ (in synchronization) with corresponding entries in the load profile.
• It is recommended to use „line“ for meters that are not synchronized, because the temporal deviations are countervailed with the time. Therewith, the time doesn’t “run away”.
• Whether these parameters are set parameters or parameterisation parameters depends on the firmware version of the meter which works at the moment with the alphaSET: Until including FW version 3.05 these are parameterisation parameters, from FW version 4.00 these are set parameters.
By clicking on the button „OK“ appears the security query „Do you want to transfer the modified data to the meter?”. "Yes" writes the changes into the meter, "no" breaks off the menu.
„Cancel" causes the leaving of the window.
7.5.2 Display Timeouts
Select via „Modify“ the menu item „Times” -> „Display Times”.
Image 7.5-2: Display timeouts
In this menu the user can define the display scroll time and the timeout for the alternate mode. After the alternate time out exceeds the limit, the meter goes back automatically in the scroll mode.
7.5.3 Communication Timeouts
Select via „Modify“ the menu item „Times” -> „Communication Times”.
Image 7.5-3: GPRS communication timeout
Notes:
• According the IEC1107 standard the maximum communication timeout between 2 characters is 1,5s.
• For GPRS application the maximum timeout between 2 characters has to be increased. The suggestion is to use in that case a timeout of 6s.
7.6 Demand reset
Select via „Modify“ the menu item „demand reset“.
Image 7.6-1: Demand reset
In this menu, the possible sources for the triggering of a maximum demand reset can be released or blocked. Settings, which are not selectable, have a grey background. The day within a month, at which the maxima demand reset should take place, can be defined with the button „every month on the... at 0.00 PM“. Moreover the duration of the reset lock time can be adjusted. The reset lock time is only active by activation over the same reset lock source. By clicking on the button „OK“ appears the security query „Do you want to transfer the modified data to the meter?”. "Yes" writes the changes into the meter, "no" breaks off the menu. „Cancel" causes the leaving of the window.
7.7 Demand overload
Select via „Modify“ the menu item „Demand overload“.
Depending on the meter firmware-version you will have up to three tabs to parametrize: • Load limitation
• Demand overload • Threshold value tan(phi) 7.7.1 Load limitation
IImage 7.7-1: Control of disconnect relay
Since firmware version 8.00 it is possible, to insert a disconnect relay. On the tab you can set the measuring value, that is responsible for the disconnection – or “<none>”. If a value is selected, the threshold value, that causes the disconnection, can be set. With the scroll bar the delay time can be set, the measuring value can be larger than the threshold value with “impunity”.
7.7.2 Demand overload
IImage 7.7-2: Demand overload
The user has the possibility to configure one or two outputs of the meter, so that by exceeding of a specific demand threshold an output contact is opened and/or closed (NOT the diosconnect relay!). The overload threshold 1 refers always to the measuring channel 1 of the meter. The overload 2 can be set on every defined measuring channel of the meter. At the start of a demand period, the output contact is either opened or closed (if it is parameterised). By exceeding the threshold the output contact is closed (opened).
Starting with the FW version 4.40 it is additionally possible to enter a threshold value for the tan(phi).
Note: The format of the overload threshold is the same as for the demand values. Up to FW
version 4.00 only one overload threshold can be parameterised, since then two. Only since firmware 4.20 is it possible to configure overload threshold 2 freely.
7.7.3 Threshold value tan(phi)
IImage 7.7-3: Threshold value tan(phi)
In this tab (available for the firmware-versions ≥ 5.31 and 9.xx) a threshold value for the tan(phi) Q1 or Q4 can be set. If exceeded, a warning can be set onto an output.