DIGGSml
Unit of Measure - resistance and conductance
We have an enumeration for a uomType of resistance, conductance and radioactivity, but there are no units specified for these.
We need to add the following at least:
resistance - ohm conductance - siemens per metre (S/m), micro siemen per cm μS/cm radioactivity - count/second (counts/s)
We need an enumeration for pressure per time (stressRate). An example is MPa/sec. This is used in something like the Unconfined Compression test for rock.
The Energistics units library DIGGS uses has the following unit symbols for pressure/time:
atm/h | standard atmosphere per hour bar/h | bar per hour kPa/h | kilopascal per hour kPa/min | kilopascal per min MPa/h | megapascal per hour Pa/h | pascal per hour Pa/s | pascal per second psi/h psi per hour psi/min | psi per minute
We can extend the measure types to include units that are not included in the Energistics library. Besides megaPascal per second, what other units are in common usage that we need to add
The Energistics units library includes the following for electrical resistance:
cohm | centiohm dohm | deciohm Eohm | exaohm fohm | femtoohm Gohm | gigaohm kohm | kilohm Mohm | milliohm mohm | milliohm nohm | nanoohm ohm | ohm pohm | picoohm Tohm | |teraohm uohm | microohm
ohm exists in the current library. Do you need any others?
For conductance, the following are available:
cS | centisiemens
dS | decisiemens ES | exasiemens fS | femtosiemens GS | gigasiemens kS | kilosiemens MS | millisiemens mS | |millisiemens nS | nanosiemens pS | picosiemens S | siemens TS | terasiemens uS | microsiemens
The unit types you specified, microsiemens per meter, etc. are units of electric conductivity, of which the following are available: S/m | kilosiemens per metre mS/cm | millisiemens per centimetre mS/m | millisiemens per metre S/m | siemens per metre
We can add uS/cm. Any others needed?
For radioactivity, the Energistics library does not include counts per second, which is instrument dependent (they do have gAPI for API gamma ray counts) If cps is commonly reported, we can add it. Any others?
With all of the above, I'll check to make sure that the quantity class types are included in the AllUnits type so that they are available for the uom property for measurement properties.