Interested to Buy Any Domain ? << Click Here >> for more details...
Why any transmitter signal is 4-20 mA only
Why is started from lower range 4 mA and upper range is
20mA.
- 5 Answers
- 12672 Views
- Edac, I also Faced
- E-Mail Answers
Answer Posted / p.v.srikumar
because if use 0 -20 mA as 0-100% there is any signal cable
damage or cable open it will show only 0%. if use 4-20mA as
0-100% it will show bad process value(live zero).
| Is This Answer Correct ? | 13 Yes | 9 No |
Post New Answer View All Answers
Why upper weighing limit of electronics balance is 90% of the total weighing capacity?
for oil & gas industries which zone is normally preferred? why? give its example?
Pl send the model question paper of mahagenco account officer post
What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.
In which principles tx ,pressure gauge,Temp gauge,control valve works?
why we take %i0.0 as input for twido plc
What is voltage regulator?
how works encoder in plc
all types instrumentation questions want
Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?
tell me the field & lab calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter, temperature transmitter, temperature indicator, flow indicator, level indicator, control valve, thermocouple, pressure indicator (digital & analogue),
Explain the difference between mmwc and mmwg?
What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.
in which principle pressure tx,level tx ,flow tx,temp tx ,control valve works?
Name different parts of a pressure gauge. Explain the use of hair spring in the pressure gauge.
