7. Pressure measurement configuration
F500
Page 18
7.a - Pressure measurement integration
The pressure measurement element is very sensitive and reacts to pressure changes. When making
measurements in unstable air movement conditions, the pressure measurement may fluctuate. The integration
coefficient (from 0 to 9) makes an average of the measurements ; this helps to avoid any excessive variations and
guarantees a stable measurement.
+/- (
Example : CP201 (0-1000 Pa) - First measurement: 120 Pa - New measurement : 125 Pa
The pressure source is stable, the user applied a low integration. Integration : 1, maximum variation allowed +/-10 Pa. Since the variation is
less than 10 Pa, we apply the integration calculation formula. Next measurement displayed ((9 * 125) + (1 *120 ))/10 = 124.5 soit 124 Pa. If
the new value had been 131 Pa, the next value displayed would have been 100% of the new value, i.e 131 Pa.
This value is applicable when the variation is less than Coef. x 10 Pa)
1
> F 100
Step
Go into configuration mode (see page 2). The folder number displayed
corresponds to the last configuration folder used.
2
> F 500
Step
Select the folder “500” and validate with .
09
3
F 500
Step
>
4
Step
With and keys, you can set the integration value: from 00 to 09.
Validate with .
Coefficient 0 : no integration, large variation of the measurement
displayed.
Coefficient 9 : maximum integration, more stable measurement display.
09
F 500
>
5
Step
Select the sub-folder “500” and validate with .
The cursor > returns to available choices.
!
Function only available on pressure transmitters:
CP 201, CP 202, CP 203 and CP 204
F 500
>
The cursor > returns to sub-folder selection
• press once to return to reading mode
• or choose another folder to access other functions.
Class 200 transmitter configuration via keypad
7.b - Autozero
Thanks to the temperature compensation of the gain (from 0 to 50°C) and to the manual auto-zero, Class 200
transmitters guarantee an excellent long-term stability, along with great measurement accuracy (in low and high
ranges). The autozero compensates for any long-term drifts of the sensitive element, with the manual adjusting of
the zero.
To autozero, unplug the 2 pressure connections tubes, and press on the AUTOZERO key (see “connection”).
If the pressure transmitter has a display screen, it’s possible to autozero by pressing the Esc button for 5
seconds.
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