CMM USER'S MANUAL (E2.51)
38
4.2.8 Automatic adjustments and starting of a continuous measurement
When the Measure button in the main program view is clicked, the program measures in continuous
mode. In continuous mode, in addition to measuring the concentration of mercury, the software can
perform automatic zero and span adjustments, span checks and blowbacks of the probe filter
depending on which options are activated in the settings of the software. See the flowchart in Figure
20
Once continuous measuring is started, the
Measure
button text indicates what type of operation is
being performed and how much time it will take for the operation to complete. Clicking the
Measure
button during a measurement will immediately cancel continuous measuring and the software will
revert back to the idle state.
4.2.9 Manual mode operation
Manual operation mode can be entered by pressing the
Manual
button at the bottom of the screen as
shown in Figure
21
.
The program remains in manual mode even when the manual mode panel is
closed until continuous measuring is resumed by pressing the
Measure
button. Manual mode is used
mainly be service personnel to debug hardware operation and run manual measurements and
calibrations. Please note that some of the functions in the panel activate other functions in the panel
as well while others cannot be activated without disabling another previously activated function.
Automatic functions like calibrations or span checks are disabled if any manual function is active. The
functions of the manual mode panel are discussed in the following table (Table
10
).
Function
Description
Measure Zero
Measures Zero gas.
Measure Hg
0
Span
Measures Hg
0
Span gas.
Blowback
Performs probe filter cleaning.
Zero Check
Performs zero adjustment routine.
Hg
0
Span Adjustment
Performs normal Hg
0
adjustment routine and defines new adjustment factors.
Hg
0
Linearity Check
Performs Hg
0
linearity check routine.
HgCl
2
Span Check
Performs normal HgCl
2
span check routine.
Measure HgCl2 span
Measures HgCl2 span gas.
HgCl2 Solution Refill
Perform refilling HgCl2 routine, this operation takes 2 minutes.
Exit
Hide manual use window.
Table 10. Manual mode operation
4.2.9.1 HgCl2 span check (CMM AutoQAL)
HgCl
2
span check can be started from the manual operations menu, which can be followed in the
main screen (
Figure 26. On-going HgCl2 span check)
. In the HgCl
2
span check display there is an
accept button that stays grey until flushes have been performed and the average of last five values
is calculated. After that the button will turn red or green, depending if the result is within allowed error
limits or not. When the button is red or green, the result can be accepted and passed (green) or
failed (red) result is saved and the check is ended. It can take a while for result to settle, so if the
button is red user should wait for longer time to see final result before accepting it. In manual mode
the test runs until result is accepted by pressing the accept button or cancelled by pressing the
measure button. In scheduled checks the system waits until result is within limits or up to 40 minutes
before saving the final result.
