APT3100 Smart Pressure Transmitter
Operation Manual M3100-E01B
37 DUON System Co., Ltd.
of English/number. This message is saved in EEPROM of transmitter.
5.8 Configuration of Breakdown Diagnostic Function
5.8.1 Loop Test
The Loop Test verifies the output of the transmitter, the integrity of the loop, and the operations
of any recorders or similar devices installed loop. Perform the following procedure for a loop test.
①
Connect a reference meter to the transmitter.
②
Select the Loop Test of HHT and operate the Loop Test.
③
Select output current ( 4mA/20mA/etc )
④
If the readings match, then the transmitter and the loop are configured and functioning
properly. If the readings do not match, then you may have the current meter attached to the
wrong loop, there maybe a fault in the wiring, the transmitter may require an output trim, or the
electrical current meter may be malfunctioning.
5.9 Calibration
Scaled system implement by calibrating the transmitter. Trim function have several function for the
calibration. Smart transmitters operate differently than analog transmitter. A Smart transmitter uses
a microprocessor that contains information about the sensor's specific characteristics in response to
pressure and temperature inputs for calculating Process Variable. The trim and rerange functions
also differ. Reranging sets the transmitter analog output to the selected upper and lower range
points and can be done with or without an applied pressure. Reranging does not change the factory
characterization curve stored in the microprocessor. Sensor trimming requires an accurate pressure
input and adds additional compensation that adjusts the position of the factory characterization
curve to optimize transmitter performance over a specific pressure range. Rerange functions
provides ability to readjust the 4~20mA points sensor inputs.
5.9.1 Sensor Trim
The Sensor Trim the transmitter sensor input signal convert A/D to lead and how it interprets the
values which it inputs with digital the contents of such interpretation and it is regarding to change
is connected actually in the sensor which in order to correspond.
5.9.2 DA (Digital to Analog) Trim
When the D/A trim convert sensor input signal to 4~20mA output, this ouput value scale
minuteness. Cyclic you recommend to scale analog output for maintain scale.
