PROCEDURE
1. Connect the Yokogawa EJA430 Smart Pressure Transmitter to the bench 24 volt power supply. Include in the loop a 250 ohm resistor (necessary for digital communication), Fluke DMM, and the BT200 Brain Terminal. Note that the BT200 can be connected at any termination point in the signal loop. Refer to the drawing shown below
2. Connect the output of one of the bench mounted pressure regulators to the transducer input of the Druck DPI 145 and to the input of the transmitter, making sure connections are tight
3. First turn on the 24 volt power supply for the transmitter, then turn on the BT200 Brain Terminal by pressing the [ON/OFF]key. The Brain Terminal runs through a self-test, and then comes up in the initial data panel. From the initial data panel, you can access the main menu panel by pressing the IF4] key. Please see pages 4-6 to 4- 12 of the BT200 Brain Terminal manual for the basic operations of the terminal
To become familiar with moving around the menu structure of the BT200, follow the procedure as outlined on pages 4-6 to 4-13 of the BT200 Brain Terminal manual, “BASIC OPERATIONS” Note that these pages are for connection to a DPharp transmitter the EJA430 is a DPharp transmitter.
4. Commission the transmitter and loop using the BT200.
(a) Confirm that the transmitter is operating properly by following the procedure on top of page 7-2 of the EJA manual, "Confirming that Transmitter is Operating Properly" and by following the procedure on page 8-25 and 8-26 of the EJA manual. "Self Diagnostics". Note that the diagnostics can be used to check four different areas please check all four!
(b) Test the accuracy of the analog output by following the procedure on page 8 of the manual, "Test output setup". Note, page 4-5 of the BT200 manual is also a useful reference. Note that Yokogawa has chosen not to give the user access to calibrating the D/A converter on it’s pressure DPharp pressure transmitters. Verify the accuracy of the analog output by completing table.1