Table of Contents
Advertisement
3.2
MAIN RUN SCREEN
The molbox RFM MAIN run screen is its home display that is reached upon power up and
from which other functions and menus are accessed. It is the top level of all menu structures.
It indicates the current measured flow as well as a variety of additional information, if desired.
The appearance of the MAIN run screen differs depending on whether the active molbloc is a
molbloc-L or a molbloc-S.
3.2.1
molbloc-L OPERATION
Some items in the molbloc-L MAIN run screen may change or flash at times, to indicate that
certain limits are exceeded, as described in the text accompanying the following screen display:
1.
<*> Ready/Not Ready indication: <*> when Ready (flashes if
Reynolds number of the flow exceeds 1 300 or if flow was not
ready for a full averaging period in AVERAGE display), <↑>
(increasing) or <↓> (decreasing) indicating direction of flow
rate evolution when Not Ready (see Section 3.1.3).
2.
<FLOWWW>:
measured by molbox RFM.
cycle if in AVERAGE display (see Section 3.4.6.2). Flashes if
Reynolds number of the flow exceeds 1 300.
3.
<UNIT>: Current flow unit of measure (see Section 3.4.3).
4.
<k>: Indicates whether a gas correction factor (K factor) is currently being applied to the measured flow (see
Section 3.4.1). <k> if a factor is being applied, blank if no factor is being applied.
5. <m>: M i c r o r a n g e o p t i o n i n d i c a t o r ( s e e S e c t i o n s 3.4.7 a n d 3.6.7) . Possible indications include:
Blank, NO character: The microrange option is currently OFF or the molbox RFM is not equipped with
the microrange option.
<m>: Automatic microrange is ON (see Section 3.4.7).
<d>: Manual microrange is ON and the differential pressure reading being used to calculate flow is
coming from the microrange differential RPT (see Section 3.6.7).
<a> (flashing): Manual microrange is ON and the differential pressure reading being used to calculate
flow is NOT coming from the microrange low differential RPT. It is the difference between the upstream
and downstream absolute RPTs (see Section 3.6.7).
6.
<GGGG>: Indicates the current molbox gas selection (see Section 3.4.2). This should be the gas that is
flowing through the molbloc.
7.
<D>: Indication of what is being displayed on the bottom line of the display as set by the DEVIATION function
(see Section 3.4.6.6). Possible indications include:
<R>: Current DISPLAY mode is RATE (see Section 3.4.6.1); or if <n avg> is in the bottom right hand
corner of the display, current DISPLAY mode is "average" and this is the instantaneous reading
AVERAGE screen (see Section 3.4.6.2).
σ
<
> Current DISPLAY mode is AVERAGE (see Section 3.4.6.2).
<H> Current DISPLAY mode is HI/LO (see Section 3.4.6.3).
<∑> Current DISPLAY mode is TOTAL (see Section 3.4.6.4).
<=>
<D> Current DISPLAY mode is DEVIATION (see Section 3.4.6.6).
<F> Current DISPLAY mode is FREEZE (see Section 3.4.6.7).
Blank, No character Current DISPLAY mode is CLEAN (see Section 3.4.6.8).
8.
<DISPLAY MODE DATA>: Information displayed depends on current display mode (see Section 3.4.6).
When a number is too large to show in the allocated display space, molbox RFM
displays <********>.
Numerical value and sign of the flow
Result of last flow averaging
Current DISPLAY mode is UNIT (see Section 3.4.6.5).
Page 25
3. OPERATION
*FLOWWW unitkm
GGGG
D DISPLAY MODE DATA
© 1998-2007 DH Instruments, a Fluke Company
Advertisement
Table of Contents
