
DigitalFlow™ XGM868i Service Manual
19
Chapter 3. Diagnostics
3.2 Displaying Diagnostic Parameters (cont.)
Table 3: Available Diagnostic Parameters
Option Bar
Description
Good
Bad
SS up
Displays the signal strength for the upstream transducer.
50–75
<50 or >75
SS do
Displays the signal strength for the downstream transducer.
50–75
<50 or >75
SNDSP
Displays the measured speed of sound in the gas.
N.A.
N.A.
Tup
Displays the upstream ultrasonic signal transit time.
N.A.
N.A.
Tdown
Displays the downstream ultrasonic signal transit time.
N.A.
N.A.
DELTA
Displays the transit time difference between the upstream and
downstream signals.
N.A.
N.A.
Tot K
Displays the total number of K factors.
N.A.
N.A.
PEAK%
Displays the percentage of peak (set to +50 by default).
N.A.
N.A.
Qup
Displays the signal quality for the upstream transducer.
>1200
–400 to +400
Qdown
Displays the signal quality for the downstream transducer.
>1200
–400 to +400
AMPup
Displays the value for the signal amplitude of the upstream
transducer.
24 ± 5
<19 or >29
AMPdn
Displays the value for the signal amplitude of the downstream
transducer.
24 ± 5
<19 or >29
CNTup
Displays the AGC DAC count for the upstream gain setting.
N.A.
N.A.
CNTdn
Displays the AGC DAC count for the downstream gain setting.
N.A.
N.A.
P#up
Displays signal peaks for the upstream transducer.
100-2300
<100 or >2300
P#dn
Displays signal peaks for the downstream transducer.
100-2300
<100 or >2300
TEMP
Displays the gas temperature (from 0/4-20 mA input).
N.A.
N.A.
PRESR
Displays the gas pressure (from 0/4-20 mA input).
N.A.
N.A.
AcVOL
Displays actual volumetric flow.
N.A.
N.A.
StVOL
Displays standard volumetric flow.
N.A.
N.A.
Tu S
1
Displays Skan transit time upstream.
N.A.
N.A.
Td S
1
Displays Skan transit time downstream.
N.A.
N.A.
DT S
1
Displays Skan Delta T.
N.A.
N.A.
Tu M
1
Displays Measure transit time upstream.
N.A.
N.A.
Td M
1
Displays Measure transit time downstream.
N.A.
N.A.
DT M
1
Displays Measure Delta T.
N.A.
N.A.
Vinst
Displays the instantaneous velocity.
N.A.
N.A.
1
available only if Burst Mode = S/M
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