Chapter 3. Operation
48 DigitalFlow™ XGM868i Startup Guide
3.5.1 Programming the LCD (cont.)
8. Scroll to the desired Channel option, as listed in Table 11.
9. For each channel, select the desired Measurement Parameter, as shown in Table 12.
Table 11: Channel Options
Option Description
CH1 Channel 1
CH2 Channel 2
SUM CH1+CH2
DIF CH1-CH2
AVE (CH1+CH2)/2
Table 12: Available Measurement Parameters
Option Bar Description Good Bad
VEL Displays the flow velocity. N.A. N.A.
VOLUM Displays the volumetric flow. N.A. N.A.
+TOTL Displays the forward totalized volume flow. N.A. N.A.
-TOTL Displays the reverse totalized volume flow. N.A. N.A.
TIMER Displays the total flow measurement time. N.A. N.A.
MDOT Displays the mass flow. N.A. N.A.
+MASS Displays the forward totalized mass flow. N.A. N.A.
-MASS Displays the reverse totalized mass flow. N.A. N.A.
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 K factor. 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.
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