Met One Instruments C-12, Руководство по эксплуатации, Страница: 27 / 41

C-12-9800 Rev A Page 27
6.7 The CALIBRATE MENU
The C-12 CALIBRATE menu provides access to a system of calibration menus which allow the
operator to audit or calibrate various system parameters for optimal performance. This menu
provides a means to calibrate the Barometric Pressure (BP) and sample flow rate (FLOW). The
CALIBRATE AUDIT menu allows verification of the optical system calibration.
Figure 6-13 The C-12 Calibrate Menu
6.7.1 The CALIBRATE FLOW Screens
The CALIBRATE FLOW screen is used for field audits and calibrations of the sample flow
measurement of the C-12.
In Figure 6-14, the first screen allows for verifying and then setting the zero flow condition, if
needed. The second screen is used for verification and calibration of the actual sample flow rate.
Press the CONTINUE button on the zero flow screen to advance to the sample flow rate screen.
Figure 6-14 C-12 Calibrate Flow Screens
The SET POINT field is the target flow rate the monitor should be maintaining. The FLOW field
indicates the current flow rate being measured by the internal flow sensor. The STANDARD field
is where the value from the traceable flow standard is entered, if necessary. See Section 7.4.1 for
details on using this screen for performing periodic flow audits and calibrations
6.7.2 The CALIBRATE AUDIT Screens
This series of screens is used to verify the optical measurement system of the C-12 monitor. A
neutral density filter calibration tool is used in conjunction with these screens to perform the
calibration audit. See Section 7.4.3 for full details on using these screens and verifying the
monitor’s calibration.