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April 2008
Setting Signal Limits
(cont.)
1-30
Note: If you enter a value of 0 for this command, you enable a
special mode of operation, ACTIVE SKAN T-OFFSET, that
dynamically calculates the offset.
[ENT]
13.Press
to accept the current % of Peak value or enter a new
[ENT]
value and press
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 1 to 100% are acceptable.
[F1]-[F4]
14.Use the [→] and
the XMIT Sample Size from the option bar.
IMPORTANT:
Consult the factory before performing this step.
Both the upstream and downstream transducers transmit ultrasonic
pulses in bursts, which consist of a series of transmit pulses.
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.
[ENT]
15.Press
to accept the current M>S_Switch value or enter a new
[ENT]
value and press
IMPORTANT:
Consult the factory before performing this step.
If the burst mode is set to Skan/Measure (S/M), the meter switches
from Skan to Measure Mode when Delta T is less than the
M>S_Switch
value. DO NOT change this value unless advised to do
so by the factory. The default value for this parameter is 50 μsec and
values from 0 to 250 μsec are acceptable.
[ENT]
16.Press
to accept the current # shifts value or enter a new value
[ENT]
and press
.
The number of shifts corresponds to the actual number of transmits
per cycle (number of signals added together in one direction to
produce an averaged signal for one interrogation of the fluid) and
need only be changed if the environment is very noisy or the acoustic
signal is weak. The default value for this parameter is 3 and values
from 0 to 10 are acceptable.
[ENT]
17.Press
to accept the current A Divisor value or enter a new
[ENT]
value and press
A Divisor
is used in the calculation of the Measure Mode integrated
threshold level and is not normally changed. The default value for this
parameter is 2.5 and values from 0.1 to 10 are acceptable.
.
keys to select one of the preset values for
.
.
Programming Site Data
XMIT
- Quick Links:
- Setting up Analog Outputs
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