Panametrics DigitalFlow XMT868i, Service Manual

Page: 28 / 74

Chapter 3. Diagnostics
4 DigitalFlow™ XMT868i Service Manual
Table 3: Available Diagnostic Parameters
Keypad
Parameter
Choice
PanaView
Parameter Choice Description Good Bad
SS up UP Sig Strength Signal strength for the upstream transducer. 50–75 <50 or >75
SS do DN Sig Strength Signal strength for the downstream transducer. 50–75 <50 or >75
Soundspeed Soundspeed Measured speed of sound in the fluid. N.A. N.A.
DAC up UP DAC AGC DAC count for upstream gain setting. N.A. N.A.
DAC do DN DAC AGC DAC count for downstream gain setting. N.A. N.A.
T up UP Transit Upstream ultrasonic signal transit time. N.A. N.A.
Tdown DN Transit Downstream ultrasonic signal transit time. N.A. N.A.
DELTA DeltaT Transit time difference between upstream and
downstream signals.
 1 µsec >1 µsec
(depends on
application)
REYN# Reynolds number Current velocity/reynolds number. N.A. N.A.
K (RE) K (RE) K factor, based on the Reynolds number. N.A. N.A.
PEAK% PEAK% Percentage of peak (set to +50 by default). N.A. N.A.
THETA Theta 3 Theta 3 is the angle between the ultrasonic beam
and the normal to the pipe wall. It is calculated from
the measured transit time and the clamp-on
parameters (clamp-ons only).
N.A. N.A.
Qup UP Signal Q Displays the signal quality for the upstream
transducer.

|1200| –1200 to +1200
Qdown DN Signal Q Displays the signal quality for the downstream
transducer.
 |1200| –1200 to +1200
AMPup UP Amp Discrim Displays value for signal amplitude of the upstream
transducer.
24 ± 5 <19 or >29
AMPdn DN Amp Discrim Displays value for signal amplitude of the
downstream transducer.
24 ± 5 <19 or >29
P#up UP +- Peak Displays signal peaks for the upstream transducer. 100-900 <100 or >900
P#dn DN +- Peak Displays signal peaks for the downstream
transducer.
100-900 <100 or >900
NFup UP Norm Factor Displays the normalization factor for the upstream
transducer.
0.85-1.0 <0.85
NFdn DN Norm Factor Displays the normalization factor for the
downstream transducer.
0.85-1.0 <0.85
Cxdcr CEE1 Displays the speed of sound in the transducer
(clamp-on only).
N.A. N.A.
TEMPs Supply Temp Displays the temperature for the supply input
(energy measurement).
N.A. N.A.
TEMPr Return Temp Displays the temperature for the return input (energy
measurement).
N.A. N.A.
Ts-Tr Supply-Rtn Difference between supply input and return input
measurement (energy measurement).
N.A. N.A.
DENSs Supply Dens Displays the density for the supply input (energy
measurement).
N.A. N.A.