Operation Manual

6-1

IM 1F5B2-01E

6. PREPARING FOR OPERATION

6.1 Checking the Flowrate Range

■ If your ULTRA YEWFLO is new, it is already calibrated to the specified range for

the flow rate.

■ When changing the range, determine the required range for the flow rate using the

following procedure.

Table 6.1 Measuring Ranges

Measurable Range of Flow Velocity (range including flow velocities with non-

guaranteed accuracy)

yticoleVwolFmuminiMyticoleVwolFmumixaM

ARTLU,s/m3.0(s/m2.0,regralsirevehcihW

ehtro)mm51siretemaidlanimons'OLFWEY

000,5rebmunsdlonyeRybnevigyticolevwolf

s/m6

Range of Flow Velocity with Guaranteed Accuracy (range for accuracy within

±1.0%)

yticoleVwolFmuminiMyticoleVwolFmumixaM

ehtfi,s/m3.0(s/m2.0,regralsirevehcihW

,51siretemaidlanimons'OLFWEYARTLU

sdlonyeRybnevigyticolevwolfehtro)mm52

000,02rebmun

s/m6

Range of Flow Velocity with Guaranteed Accuracy (range for accuracy within

±0.5%)–applies only to models with suffix code /HAC, but except for size 25mm,

150mm and 200mm.

yticoleVwolFmuminiMyticoleVwolFmumixaM

yticolevwolfehtros/m2.0,regralsirevehcihW

sadetaluclacrebmunsdlonyeRehtybnevig

retemaidlanimon

000,1

wolfehtros/m6,rellamssirevehcihW

rebmunsdlonyeRehtybnevigyticolev

sadetaluclac retemaidlanimon

000,4

nahtiwylpmoc1.6elbaTninwohssegnarehtnidedulcnitonseiticolevwolF:ETON

fognitarycarucca ± .%0.1

■ Equation for determining the Reynolds number:

Re=

354 × 10

× Qf

ν × D

■ Equation for determining the kinematic viscosity:

ν=

ρ f

× 10