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IOM Single Case BiRotor Plus R06
9.2 Higher Temperature Start Up
On higher temperature start up above 212°F (100°C),
based on an ambient temperature of 70°F (21°C),
special start up procedures are required to prevent
damage to the fl ow meter components. A similar
procedure should be followed on any thermal shock
in excess of 176°F (80°C). The following equation may
be used to determine the approximate fl ow meter
warm up time.
t
h
= [(C
nom
)· (OT
°f
- 212)]/100
t
h
= Warm Up Time in Hours
C
nom
= Nominal Connection Size
OT
°f
= Operating Temperature in °F
During this warm up time the meter should be operat-
ed at approximately 5% of maximum fl ow to allow the
temperature to stabilize.
9.3 Custody Transfer
A meter factor will need to be established under actu-
al operating conditions if the instrument is to be used
in custody transfer applications. This inital proving
run should be carried out following the completion of
the meter start up procedure, and in accordance with
local regulations.
NOTE:
There are no user adjustable parts in these instru-
ments, however, the instrument housing is provid-
ed with two cross-drilled bolts and drain plugs to
facilitate sealing if required by the local weights and
measurements regulations.
Typical Horizontal Installation with Associated Accessories
Model 200
F/A Converter
Electronic Register
Batch Controller
Pressure
Guage
Strainer
Pressure
Guage
Upstream
Digital Control Valve
Electronic Preset
BiRotor Plus
Figure 8-3 Horizontal Installation
