GE DigitalFlo XGM868i Service Manual page 27

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