GE PT878 User Manual

Page of 297
Chapter 9. Diagnostics and Troubleshooting
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
207
Xmit Corr 
Up
Displays raw upstream signal correlated 
with transmit signal.
N/A
N/A
Xmit Corr 
Dn
Displays raw downstream signal correlated 
with transmit signal.
N/A
N/A
Cross Corr
Displays transmit upstream signal corre-
lated with transmit downstream signal.
N/A
N/A
SS up
Displays the signal strength for the 
upstream transducer.
50-80
<50
SS do
Displays the signal strength for the 
downstream transducer.
50-80
<50
PEAK%
Displays the Percent of Peak. Set to -40 by 
default. To change see page 182.
N/A
N/A
Qup
Displays the signal quality for the upstream 
transducer. 
±300 or 
higher
 between 
±100
Qdown
Displays the signal quality for the down-
stream transducer.
±300 or 
higher
between 
±100
NFup
Displays the normalization factor for the 
upstream transducer.
 0.85 -   1.0
<0.85
NFdn
Displays the normalization factor for the 
downstream transducer.
0.85 - 1.0
<0.85
TEMPs
Displays the temperature for the supply 
input (energy measurement).
N/A
N/A
TEMPr
Displays the temperature for the return 
input (energy measurement).
N/A
N/A
Ts - Tr
Displays the difference between the tem-
perature for supply input and the tempera-
ture for return input (energy measurement).
N/A
N/A
DENSs
Displays the density for the supply input. 
(Energy measurement.)
N/A
N/A
DENSr
Displays the density for the return input. 
(Energy measurement.)
N/A
N/A
DELTh
Displays the delta enthalpy, or difference 
between the supply and return enthalpy 
(enthalpy is a measure of energy contained 
in the fluid.) (Energy measurement.)
N/A
N/A
Table 8:  Diagnostic Parameters (cont.)
Diagnostic
Parameter
 Displays
Good
Bad