Yes, that is the current limit. I can modify the configuration for higher pressure testing in the future, if required.
For my current UL shelter material testing, the critical range where I want the most measurement granularity is between 1,500mm H2O - 2,112mm H2O to test rainproofness. Per the International Standards Organization 811, materials require a MINIMUM hydrostatic head of 150 cm (1,500mm) to be designated, in general, as rainproof. For US weather, 2,112mm H2O is a prudent level to be rainproof. Some US storms will require more than 2,112mm H2O HH to be rainproof.
The term waterproof is frequently used as a marketing buzz word; it has no precise meaning without qualifying it in each context used. For example, water jets are routinely used to cut metal and so even metal is not waterproof without a precise qualification of the water pressure force.
Only if I were doing rainproof tests for UL shelters to be used in the Brazil and Marshall Islands areas would I have to configure my tester for measuring pressures higher than 3,515mm H2O. Also if was focusing on flooring material, would I have to configure my tester for measuring pressures higher than 3,515mm H2O.