Table of Contents
Advertisement
Operation
The current loop transports power to and output sig-
nals from the Transmitter. The current is controlled
by the process variable selected in the configuration.
The current characteristic can be configured as lin-
ear or logarithmic curve for conductivity and resistiv-
ity.
The current beginning and end can be set to repre-
sent any desired value.
If LIN (linear characteristic) is chosen, the minimum
span is 5% of the selected process variable / mea-
surement range. If LOG (logarithmic characteristic) is
chosen, the minimum span is one decade within the
chosen range.
To check connected peripherals (e.g. limit switches,
controllers), the loop current can be manually speci-
fied (see Pg. 28).
The APT2000TC-H-.. Transmitter can be remote
controlled via HART communication. It can be con-
figured using a handheld terminal or from the control
room. Measured values, messages and instrument
identification can be downloaded at any time. This
allows easy integration also in fully automatic pro-
cess sequences.
For more detailed information, refer to the HART
Command Specification.
18
During an error message the alarm LED flashes.
Alarm response time is permanently set to 10 sec.
Error messages can also be signaled with a 22 mA
signal via the loop current (see Configuration,
Pg. 20).
Hide quick links:
Advertisement
Table of Contents
