Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 104 / 132

IM-P198-05 MI Issue 2 104
6.2 Level one hidden diagnostics values
f Turbine frequency (Hz).
fi
Adaptive filter - should be approximately 25% higher than the
turbine frequency, this is a low-pass filter. If the meter is using the
Filter Control (see below) in the manual mode, fi will be displayed
as fm.
G
Gain (applied to turbine signal amplitude). Gain defaults to 1.0 and
can be changed using the Gain Control (see below).
A Amplitude of turbine signal in Volts rms.
A1, A2, A3, A4
A/D counts representing the turbine signal amplitude. Each stage
(A1-A4) cannot exceed 512. Beginning with stage A1, the A/D
counts increase as the flow increases.
When stage A1 reaches 512, it will shift to stage A2. This will
continue as the flowrate increases until all 4 stages read 512 at
high flowrates. Higher flowrates (stronger signal strength) will result
in more stages reading 512.
V Calculated average pipe velocity (ft/sec).
Re Calculated Reynolds number.
Profile Factor Factory use only.
Obscuration Factor Factory use only.
RTD1 Resistance value of integral RTD in ohms.
RTD2
Optional RTD resistance value in ohms.
Pe(v) Pressure transducer excitation voltage
Pv(v) Pressure transducer sense voltage.
Stnd Density of fluid at standard conditions.
Nrml Density of fluid at normal conditions.
Viscosity Calculated viscosity of flowing fluid.
x Cnts A/D counts from the external 4-20 mA input.
Ext x.xxx mA Calculated external 4-20 mA input from the digital counts.
Ck
Calculated Ck at current operating conditions. Ck is a variable
in the equation that relates signal strength, density, and velocity
for a given application. It is used for noise rejection purposes.
Ck directly controls the fi value (see above). If the Ck is set too
low (in the calibration menu), then the fi value will be too low and
the turbine signal will be rejected resulting in zero flowrate being
displayed. The calculated Ck value in this menu can be compared
to the actual Ck setting in the calibration menu to help determine
if the Ck setting is correct.