Custody Transfer / Flow Calibration; Remote Operation; Remote Interface - Ecom CP 400 Operating Instructions Manual

Setup 5: The upper display is set to [P], the middle display is set to [P2] and the lower
display is set to RTD.

10. Custody Transfer / Flow Calibration

The CP 400/420 is ideal for flow computer calibration. Every manufacturer of flow
computers has a different calibration procedure, but most call for calibration of three
parameters: static pressure, differential pressure and temperature. To facilitate these
measurements recall setup #5 on the CP 400/420.
Note: The pressures in the UPPER, and MIDDLE displays can be changed to [P],
[P2], and EXT.
. Connect the calibrator to your static and differential pressures. ([P], [P2], EXT) Then
connect the RTD sensor to the calibrator.
2. Using the reading of your RTD, static, and differential pressures make sure the flow
computer has the correct reading. If not, adjust the flow computer as necessary.

11. Remote Operation

11.1 Remote Interface

The calibrator can be remotely controlled using a PC terminal, or by a computer program
running the calibrator in an automated system. It uses an RS-232 serial port connection
for remote operation. NOTE: To use the remote control option a custom RS-232
cable must be purchased from ecom (LEM232).
With this connection the user can write programs on the PC, with Windows languages like
Visual Basic to operate the calibrator, or use a Windows terminal, such as Hyper Terminal,
to enter single commands. Typical RS-232 remote configurations are shown in Figure 3.
Figure 13. Calibrator-to-Computer Connection
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