The Calibration Menu; Zero Set Calibration - Thermo Scientific DCT6088 User Manual

The Calibration

Zero Set Calibration

Thermo Fisher Scientific
Within the Calibration menu is the Calibration Group menu (50). This
menu contains four setup menus: Zero Set, Scale, SS Comp, and Date
Menu
(menus 51 through 54).
Figure 5–37. Calibr menu
An important step in assuring accurate flow measurement is the proper
calibration of the instrument and the installation. The calibration methods
must be performed for the particular pipe that is to be metered. The
following table provides guidelines for selecting a calibration method.
Table 5–2. Calibration methods
Calibration Method
Zero flow set (zero set
calibration)
Manual zero set (zero
set calibration)
Scale Factor
After installing the meter, you may find that a small adjustment to the zero
point (zero set calibration) is required. Zero set calibration enables the
meter to read very close to zero under zero flow conditions. There are two
zero set calibration methods: the zero flow set method and the manual zero
set method. View the zero point used by the flowmeter in either of these
methods by selecting Manual in menu 51.
After the instrument is properly zeroed, it should display a stable reading
well below 0.05 ft/s (0.015 m/s) under zero flow conditions with the low
flow cutoff disabled.
Prior to performing a zero set calibration, verify the following:
Transducers are connected to the pipe.
●
Instrument is reading flow.
●
Low flow cutoff is disabled to allow verification of calibration.
●
Function
Zeroes the instrument for an
actual no flow condition.
Applies a manually entered
offset to all flow readings.
Compensates for manufacturing
variations in the transducers.
Primary Displays & Menus

The Calibration Menu

Application
Installations where flow can be
stopped.
Where an offset is required.
Set by the factory to the value
imprinted on the transducers.
DCT6088 User Guide 5-13