KROHNE VFM 5090 EN - Manual (Page 34)

To reset totalizer - Select RESET then select RESET
YES as a double confirmation.
To set totalizer - Select SET then enter the value
LIMITS - Setting limits 0 to 1,000,000
APPEARS - Always.
Fct. 3.2.6 TOT. ON/OFF totalizer on/off
Select option TOT. ON to start/restart totalizer and
select option TOT. OFF to stop totalizer. Stopping
totalizer means flow will not be accumulated till the
time totalizer is turned on again.
LIMITS - Not applicable.
APPEARS - Always
Fct. 3.3.0 OPR.LIMITS
This submenu level has functions which allow user to
set process temperature and pressure limits. These
values should be within the physical limits of the
instrument itself. (Physical limits are programmed by
KHRONE MARSHALL and user has no access to
them. They depend on primary pressure rating and
standard or high temperature version). Programming
these values are important because it is possible to
ascertain whether any limit is being exceeded by the
process.
To check pressure limits pressure sensor should be
present in the primary. Temperature sensor is always
present in the primary.
APPEARS - Always.
Fct. 3.3.1 TEMP. LOW temperature low limit
Enter value for operating temperature lower limit. The
value can be entered in the following units -
l Deg. C l Deg. F l KELVIN
LIMITS - Temp_low_phy to temp_high_phy are the
physical limits which are preprogrammed by
KHRONE MARSHALL. Typically, the ranges are :-
20 to 180 Deg. C and -20 to 240 Deg. C for standard
and high temp. version respectively.
APPEARS - Always.
Fct. 3.3.2 TEMP. HIGH temperature high limit
Enter value for operating temperature higher limit.
The value is entered in the same units as in Fct. 3.3.1
above.
LIMITS - temp_low_opr to temp_high_phy.
temp_low_opr is temperature value entered in Fct.
3.3.1 TEMP.LOW.
APPEARS - Always.
Fct. 3.3.3 PRES. LOW pressure low limit
Enter value for operating pressure lower limit. The
value can be entered in the following units. Unit with
the _g suffix are gauge pressure units and those
without the same absolute pressure units.
l Pa l KPa l atm
l Bar l mBar l PSI
l Lbf/ft2 l Kg/cm2 l In. Hg
l mm Hg l mm Water l Pa_g
l KPa_g l atm_g l Bar_g
l mBar_g l PSI_g l Lbf/ft2_g
l Kg/cm2-g l In. Hg_g l mm Hg_g
l mm Water_g
LIMITS - Pres_low_phy to pres_high_phy
above are the physical limits which are
preprogrammed by KHRONE MARSHALL,
depending on the pressure rating of primary.
APPEARS - Always.
Fct. 3.3.4 PRES. HIGH pressure high limit
Enter value for operating pressure higher limit. The
value is entered in the same units as in Fct. 3.3.3
above.
LIMITS - Pres_low_opr to pres_high_phy
pres_low_opr is pressure value entered in Fct. 3.3.3
PRES.LOW.
APPEARS - Always.
Fct. 3.5.0 APPLICAT.
This submenu groups functions which allow to
view/enter the application data. These functions gives
the following information to the instrument.
- process medium
- operating temperature and pressure conditions.
- density of medium at operating conditions. Required
only if software within instrument do not support the
medium (Fct. 3.5.2 is selected as -NONE-).
- normal or reference P & T values required for
normalized flow measurements only (depending on
Fct. 1.1.1). Usual values are temp.norm=0 or 20
0 C
and pres.norm=1 atm.
- density at normal conditions. Required only for
normalized volumetric flow and if software within
instrument does not support the medium (Fct. 3.5.2 is
selected as -NONE-).
APPEARS - Always.
31