Nivus NivuLog Easy V3, Руководство пользователя

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Chapter 10 User interfaces
channel (see "Measurement channels" on page 75). If "Cnt.Inf." mode is active, the measurement value
contains the current counter reading of the infinite counter. In return, the measurement channel that is
assigned to the relevant universal input as standard is set to NaN.
Switching the measurement channels is necessary as the data type of the standard measurement channels is
f32 (32Bit floating point) and thus does not cover the necessary value range or provide the necessary level of
accuracy. However, the two measurement values detailed in this chapter are s64 (64Bit signed) types and
are thus perfectly suitable for saving infinite counter readings. It must be noted counter readings are always
saved internally as whole numbers. This means that if a floating-point number is specified for the "Pulse"
parameter, the server moves the comma accordingly and transmits an integer multiplication factor to the
NivuLog Easy V3 . This does not affect the visualisation and download of the data as the Device to Web
server takes the movement of the comma into consideration before displaying/issuing the number.
All of the necessary settings for both of the measurement channels are implemented by the "Measurement
channels" configuration section (see "Measurement channels" on page 75). This also applies to title of the
measurement channel. Although the "Cnt.Inf." label is added on so that it can be differentiated from the
relevant measurement channel assigned to the universal input as standard.
<Title of the universal input 1> Cnt.Inf.
Current counter reading of the infinite counter that is assigned to universal input 1
<Title of the universal input 2> Cnt.Inf.
Current counter reading of the infinite counter that is linked to universal input 2
Note:
Additional explanation on calculating the counter reading for an infinite counter:
Assumption: The counter returns one pulse per 5l. The counter reading should be displayed in [m³] on the
server interface. Eight pulses were registered by the universal input. The previous counter reading was 0.03m³.
Parameter Value
Pulse 5
Pulse unit l
Pulse factor 0.001
Unit m³
Configuration
Counter reading [m³] = previous counter r { ( registered pulses * pulse [l] ) * pulse factor }
Counter reading [m³] = 0.03 + { ( 8 * 5 ) * 0.001 } = 0.07
NivuLog Easy V3 - Rev. 03 as of 24.10.2018 109 of 141