GE DigitalFlow DF868 User Manual

Programming Site Data 1-27
March 2008
Transit-Time SIGNL Options
(cont.)
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.
9. Press
[ENT] to accept the current Amp. Discrim High 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 34 and values from 0 to 100 are acceptable. The
E5:
AMPLITUDE
error message appears when the amplitude discriminator
exceeds the programmed
AMP. DISCRIM HIGH value. See the Service
Manual for a discussion of error codes.
10.Press
[ENT] to accept the current Delta T Offset value or enter a
new value and press
[ENT].
An offset between the upstream and downstream transit times is
specified at this prompt. The default value for this parameter is 0 μsec
and values from –1000 to 1000 μsec are acceptable.
11. Press
[ENT] to accept the current % of Peak value or enter a new
value and press
[ENT].
The percentage of peak used to calculate the transit times and Delta T
is specified at this prompt. The default value for this parameter is
50% and values from -100% to 100% are acceptable.
12.Use the [→] and
[F1]-[F4] keys to select one of the preset values for
the XMIT Sample Size from the option bar.
Both the upstream and downstream transducers transmit ultrasonic
pulses in bursts, which consist of a series of transmit pulses.
XMIT
SAMPLE SIZE
determines how many bursts are sent in one direction
before sending in the other direction. The default value for this
parameter is 8 and values of 2, 4, 8, 16 and 32 are acceptable.
13.Press
[ENT] to accept the current # of Errors value or enter a new
value (0 to 16) and press
[ENT].
Use this prompt to enter the number of errors the DF868 can record
before it displays an error message. The default value is 6.
14.Press
[ENT] to accept the current Minimum Peak % Limit value or
enter a new value and press
[ENT].
Use this prompt to enter the minimum percent of peak that the DF868
can use to measure transit time. The DF868 accepts values from
-100 to +100.

GE DigitalFlow DF868 Specifications

General

Brand	GE
Model	DigitalFlow DF868
Category	Measuring Instruments
Language	English