GE DigitalFlow DF868 Service Manual

DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Service Manual 23
Chapter 3. Diagnostics
3.3 Diagnostic Record
Upon leaving the Diagnostic Menu via the [EXIT] key or the EXIT option on the option bar, the display screen will
continue to show the last diagnostic parameter that was selected. To return to normal measurement mode, select a
channel to display (for a 2-Channel meter only) and then select the desired display parameter. See Chapter 3,
Operation, of the Startup Guide for detailed instructions.
The values for the diagnostic parameters immediately after initial installation of the meter and verification of proper
operation should be entered in Table 7 on page 39. These values can then be compared to future values to help diagnose
any future malfunction of the system.
CNTdn Counts down Displays automatic gain control setting for the
downstream signal.
N.A. N.A.
P#up UP +- Peak Displays signal peaks for the upstream transducer. 100-2300 <100 or
>2300
P#dn DN +- Peak Displays signal peaks for the downstream transducer. 100-2300 <100 or
>2300
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 deg F Displays the temperature for the supply input (energy
measurement).
N.A. N.A.
TEMPr Return Temp deg F 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
management)
N.A. N.A.
DENSr Return Dens Displays the density for the return input (energy
management)
N.A. N.A.
DELTh Delta h Displays the delta enthalpy, which is the difference
between the supply and return. Enthalpy is a measure
of energy contained in the fluid (energy measurement).
N.A. N.A.
TW Transmit Wedge Displays the current adjustment in transit time
measurements due to signal delay in transducers.
N.A. N.A.
Table 3: Available Diagnostic Parameters (cont.)
Option Bar Screen Display Description Good Bad

GE DigitalFlow DF868 Specifications

General

Brand	GE
Model	DigitalFlow DF868
Category	Measuring Instruments
Language	English