translation discussion
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For installations where the operating flow rate is below 15% of the rated flow rate, an additional flow transmitter for the low range is required. When the operating flow rate is 15% lower than the measured flow rate, a flow transmitter for the low range must also be installed in addition to the flow differential pressure generator. Please evaluate my translation of this sentence (as shown above)! A more authentic translation is welcome.
Installations where the operating flow is below 15% of the rated flow shall be equipped with an additional flow transmitter for the low range; if the operating flow is 15% lower than the measured flow, a flow transmitter for the low range must be added.
Installations whose operating flow is below 15% of the rated flow shall be equipped with an additional flow transmitter for the low range; if the operating flow is 15% lower than the specified value, a flow transmitter for this low-range condition must be installed.
So when installing a differential pressure transmitter once, it’s LZ who decides based on their own understanding. In my understanding, it involves installing an additional differential pressure transmitter with a lower range on top of the existing transmitter (a dual-range differential pressure flow meter), in order to address the accuracy issues that arise when measuring low flow rates with a differential pressure flow meter, as shown in the diagram
If the operating flow rate is 15% lower than the normal operating flow rate, a low-flow transmitter should be installed.
When the operating flow rate is below 15% of the rated flow rate, an additional flow transmitter needs to be installed within this low range.