SIKA TD 32500 Operating Manual
5.2.1.7 Programming gate time
Proceed as follows to program a new gate time (sampling time):
• The message „SET GATE TIME – NO“ appears.
• Switch with the ▲ key to „YES“ and confirm with the
key.
• Select with the ▲ key one of the following measuring rates:
• Confirm the currently displayed sampling rates by pressing the
key.
• Quit the configuration menu, return to the menu start or continue to
c
onfigure the successive parameters.
Note: Gate time is the period which the instrument TD 32500
needs to measure the flow.
With long gate times is the calculated flow signal very precise but
flow changes prolong response time.
With short gate time is the calculated flow signal more imprecise,
but with flow changes the response is shortened.
Note: If the frequency generated by the flow sensor is below
20 Hz, TD 32500 switches automatically from gate time measuring
process to a pulse-length measuring process. This improves
measuring precision with low frequencies.
The duration of one oscillation period is measured by the
TD 32500 in a pulse-length measuring process. Thus the
response time for flow changes is equal to the duration of one
oscillation.
This is calculated by: t
R
= 1/f
S
:
Sensor-Frequency
Response Time
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