
24
Micro Motion
®
Model 2400S Transmitters with Analog Outputs
Flowmeter Startup
5.2
Applying power
Before you apply power to the flowmeter, close and tighten all covers.
Turn on the electrical power at the power supply. The flowmeter will automatically perform
diagnostic routines. When the flowmeter has completed its power-up sequence, the status LED will
turn green. If the status LED exhibits different behavior, an alarm condition is present or transmitter
calibration is in progress. See Section 7.4.
5.3
Performing a loop test
A
loop test
is a means to:
•
Verify that analog outputs (mA and frequency) are being sent by the transmitter and received
accurately by the receiving devices
•
Determine whether or not you need to trim the mA output
•
Select and verify the discrete output voltage
•
Read the discrete input
Perform a loop test on all inputs and outputs available on your transmitter. Before performing the loop
tests, ensure that your transmitter terminals are configured for the input/outputs that will be used in
your application (see Section 6.3).
To perform a loop test:
•
Using the display, see Figure 5-2. While the output is fixed, dots traverse the top line of the
display and the status LED is yellow. When the output is unfixed, the dots disappear and the
status LED returns to its previous state.
•
Using ProLink II, see Figure 5-3.
•
Using the Communicator, see Figure 5-4.
WARNING
Operating the flowmeter without covers in place creates electrical hazards
that can cause death, injury, or property damage.
To avoid electrical hazards, ensure that the warning flap and transmitter housing
cover are in place before applying power to the transmitter.
WARNING
Using the service port or HART clips to communicate with a Model 2400S AN
transmitter in a hazardous area can cause an explosion.
Before using the service port or HART clips to communicate with the transmitter in
a hazardous area, make sure the atmosphere is free of explosive gases.
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