Flow vision FC 01- CA, User Manual

Page: 42 / 76

CONFIGURATION
42
Flow Meter | FC 01- CA
5 .4 Gas selection (
menu option:
GAS SELECT)
This menu option allows the selection of the following gases:
• AIR • NITROGEN N
2
• OXYGEN O
2
• CARBON DIOXIDE CO
2
• ARGON Ar • METHANE/NATURAL GAS CH
4
• HYDROGEN H
2
Caution!
Under unfavourable conditions ignitable gas mixtures may develop. The user has to clarify whether
Ex conditions are on hand and whether the corresponding requirements have to be observed.
It has to be ensured that no icing of the monitoring head occurs.
Individual gas density is taken into account when calculating the mass flow of these gases (see
DISPLAY SELECT).
Standard densities at 1.013 bar/14.7 PSI and 0 °C/32 °F:
air 1.293 kg/Nm
3
argon 1,784 kg/Nm
3
oxygen 1.429 kg/Nm
3
carbon dioxide 1,977 kg/Nm
3
nitrogen 1.250 kg/Nm
3
methane/natural gas 0,717 kg/Nm
3
hydrogen 0,0899 kg/Nm
3
For carbon dioxide (CO
2
) and argon (Ar) characteristic curves determined in our lab have been
stored, which have been released for the adapters TP-01 … TP-04 only.
This menu option allows the addition of other gases as required by customer.
5 .5 Limit switch combinations
(menu option:
LIMIT SWITCHES
)
The FC01-CA comprises two limit switches (LS1 and LS2) which are assigned to the physical
quantity/quantities to be monitored in submenu LIMIT SWITCHES.
The following combinations are available:
• LS1
→
F and LS2
→
F
limit switch 1
→
flow rate
limit switch 2
→
flow rate
• LS1
→
T and LS2
→
T
limit switch 1
→
medium temperature
limit switch 2
→
medium temperature
• LS1
→
F and LS2
→
T
limit switch 1
→
flow rate
limit switch 2
→
medium temperature
• LS1
→
T and LS2
→
F
limit switch 1
→
medium temperature
limit switch 2
→
flow rate
Mode of operation, limit value and hysteresis of the limit switches are set in menu “PARAMETER
SELECTION”.
Caution!
Menu option “LIMIT SWITCHES” may influence data in the parameter selection menu
(see para. 5.13, Quitting the configuration menu).