[1.4] Measuring Ranges; Overview Of Measuring Ranges - Siemens SIPROCESS GA700 Quick Start Manual

7.7.4

[1.4] Measuring ranges

7.7.4.1

Overview of measuring ranges

Note
Putting back into operation with disabled measuring ranges
The measuring ranges are activated in the factory. If you disable the measuring ranges
(setting: "Off"), all the setting options in other menus related to the measuring range are also
hidden. The measuring ranges can no longer be used.
If you put the device back into operation with fully deactivated measuring ranges, the status
bar of the display shows message 150 "Parameter value invalid". Before you continue to put
the device back into operation:
• Activate at least one measuring range
• Disable the autoranging function if it is enabled To use the automatic measuring range
switching, at least two measuring ranges must be active.
The device lets you set measuring ranges permanently or switch them over automatically.
Contrary to the permanent setting, the measuring range follows the current measured value
with automatic switchover. You can define up to four measuring ranges for each component.
The start-of-scale values and the end-of-scale values are assigned to the low or high value
of the analog output (scaling of the analog output). The following settings are available:
● NAMUR
– Current range as per NAMUR NE043: 4 to 20 mA
– Alarm at <3.6 mA and >21 mA
● 4 to 20 mA or 20 to 4 mA
● 0 to 20 mA or 20 to 0 mA
Autoranging
Setting requirements
To activate the autoranging, note the following:
● At least two measuring ranges are set and activated for a component.
● The measuring ranges border on each other or overlap.
● The spans of the set measuring ranges must increase (ms
Based on these requirements, the following two measuring range types described below are
derived for autoranging.
Quick Start
Compact Operating Instructions, 05/2018, A5E31805656-06
Commissioning
7.7 Commissioning the device
> ms )
i (i+1)
91