Panametrics DigitalFlow DF868 - Page 31

DigitalFlow™ DF868 Multipurpose Ultrasonic Liquid Flowmeter Programming Manual (2-Channel) 21
Chapter 1. Programming Site Data
Transit-Time SIGNL Options
2. Press [ENT] to accept the current Signal Low Limit value or enter a new value and press [ENT].
The default value for this parameter is 40 and values from –20 to 100 are acceptable. The E1: LOW SIGNAL error
message appears when the signal strength falls below the programmed Signal Low Limit value. See the Service
Manual for a discussion of error codes.
3. Press [ENT] to accept the current Cor. Peak Limit value or enter a new value and press [ENT].
The default value for this parameter is 100 and values from 0 to 500 are acceptable. The E4: SIGNAL QUALITY error
message appears when the signal quality falls below the programmed COR. PEAK LIMIT value. See the Service
Manual for a discussion of error codes.
4. Press [ENT] to accept the current Soundspeed +– Limit value or enter a new value and press [ENT].
The default value for this parameter is 20% and values from 1% to 50% are acceptable. The E2: SOUNDSPEED error
message appears when the calculated fluid soundspeed differs from the fluid soundspeed entered in the SYSTEM
menu by more than the programmed Soundspeed +– Limit value. See the Service Manual for a discussion of error
codes.
5. Press [ENT] to accept the current Velocity Low Limit value or enter a new value and press [ENT].
The default value for this parameter is –40.0 ft/sec (–12.142 m/sec) and values from –100 to 100 ft/sec (–30.48 to
30.48 m/sec) are acceptable. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity is
less than the programmed VELOCITY LOW LIMIT value. See the Service Manual for a discussion of error codes.)
6. Press [ENT] to accept the current Velocity High Limit value or enter a new value and press [ENT].
The default value for this parameter is –40.0 ft/sec (–12.142 m/sec) and values from –100 to 100 ft/sec (–30.48 to
30.48 m/sec) are acceptable. The E3: VELOCITY RANGE error message appears when the calculated fluid velocity
exceeds the programmed VELOCITY HIGH LIMIT value. See the Service Manual for a discussion of error codes.
7. Press [ENT] to accept the current Acceleration value or enter a new value and press [ENT].
The default value for this parameter is 15.0 ft/sec
2
(4.6 m/sec
2
) and values from 0 to 100 ft/sec
2
(0 to 30 m/sec
2
) are
acceptable. The E6: CYCLE SKIP error message appears when the calculated fluid velocity changes by more than the
programmed ACCELERATION LIMIT value from one reading to the next. See the Service Manual for a discussion of
error codes.
8. Press [ENT] to accept the current Amp. Discrim Low value or enter a new value and press [ENT].
The amplitude discriminator measures the size of the transducer signal received by the Model DF868. The default
value for this parameter is 14 and values from 0 to 100 are acceptable. The E5: AMPLITUDE error message appears
when the amplitude discriminator falls below the programmed AMP. DISCRIM LOW value. See the Service Manual for
a discussion of error codes.