Calibration; Calibrate Using The Front Panel; Input Calibration - Omni 4000 Series Installation Manual

5. Calibration

After configuring the flow computer, calibrate the analog inputs and outputs using either the front
panel or the Diagnostics and Calibration menu in OMNICONNECT.
Follow the temperature stability requirements of electrical equipment (such as current generators,
voltage generators, digital voltmeters) used during the calibration process.
To help ensure accurate calibration measurements, follow these guidelines:
•
Keep the flow computer closed to retain internal heat when calibrating the standard panel
mount models.
•
Verify that the flow computer is not in a high air draft area (for example, in the path of a fan or
AC duct) and allow enough time for the temperature to stabilize.
•
If it is necessary to replace a hardware module, allow 20 minutes for the temperature
to stabilize.
5.1

Calibrate Using the Front Panel

Access the calibration tools through the front panel of the OMNI 4000/7000 flow computer.
For initial calibration, the Input Verification and Output Verification menu selections
are not used.

5.1.1 Input Calibration

The options to calibrate by variable name (for example, 'Temperature'), will not be
selectable under the six individual meters or the two stations or the prover until input
channels have been assigned to them in OMNICONNECT.
To calibrate the input channels, follow these instructions:
1. a. From the Home screen on the
front panel display, use the arrow keys
to navigate to and select Utilities.
b. Press the OK key or the Enter key
on the front panel.
2. a. On the Utilities screen, use the
arrow keys to navigate to the
Calibration menu selection.
b. Press OK or Enter.
5-1
OMNI 4000/7000 Installation Guide – Rev H
Calibration