There is no difference between HMI and MMI.
MMI stands for Man Machine interface.
HMI stands for Human Machine Interface.
Then there will rise a question why there are two terms.
In the ewarlier days only men used to work in any control
room. But now a days womwn are also working in all Controll
rooms.Hence the word HMI has been ome in usage.Just to
avoid any doubt that in control both men and women can work.
Answer no 5 seems to be correct with answer no 3. Intially
the machine interfaces are having limited capabilities and
then enhanced to higher levels. So answwer no 3 may be
taken as correct and while renaming while tech advancing
Answer no 5 must have been considered.
There was an another term calleed GUS: Global User Staion
But HMI stands dominating. MMI (favour towards men), GUs
(not specific for machine interface)
a pressure transmitter with a range of 0 to 2500kpag has a specified accuracy of
0.5 % of span.It is to be calibrated using a comparison gauge to have an accuracy
of 0.1% of span.The comparison gauge has a range of 0 to 3000kpag What is the
accuracy ratio? is this ratio acceptable?
if we open the inlet of an air regulator ,how it will affect
the out put of regulator? (out put of regulator is using to
operate an on-off valve.it is an air to open valve,and valve
is in open position.my doubt is air regulator will hold the
valve in open or not,if there is no consumption or leak in
regulator out put side ,we only loose the input pressure.)