2. Use of the GP 500
2.1. Turn on the device
To turn on the GP500 :
➢ Connect the GP500.
It is not compulsory to connect the GP500. Its internal battery has 8 hours of autonomy. However, in case of
extended use, it is recommended to connect it on the mains power source.
➢ Press on “On/OFF” at the top right of the user interface.
2.2. Configure the device before a measurement or a generation
2.2.1 Activate or deactivate the automatic autozero
➢ Press on “Param.”.
➢ Go to the line “AutoZ” and press on OK.
➢ With the arrows select “ON” to activate the automatic autozero or “OFF” to deactivate the automatic autozero.
This autozero will perform every 20 seconds for a measurement lower than 100 Pa, every minutes for
measurement lower than 1000 Pa and every 5 minutes for a measurement higher than 1000 Pa.
➢ Press on OK to validate.
➢ Press on ESC to return to the measurement display.
2.2.2 Set the integration
The GP500 pressure measurement element is very sensitive and very reactive to pressure changes. During measurements
on an unstable aeraulic network, the pressure measurement becomes illegible. The integration coefficient (from 0 to 9) then
allows to smooth the pressure measurement in order to avoid the untimely variations and allow the exploitation of a more
stable measurement.
➢ Press on “Param.”.
➢ Go to the line “Integration” then press on OK.
➢ With the arrows select the desired integration between 0 and 9.
➢ Press on OK to validate.
➢ Press on ESC to return to the measurement display.
2.2.3 Select the unit
➢ Press on “Unit” .
The unit currently used displays at the top of the screen.
➢ With the arrows select the desired unit : Pa, daPa, hPa, mmH
2
O, mmHg, mbar and inWg.
➢ Press on OK to validate.
2.2.4 Perform a manual autozero
➢ Press on to trigger the autozero.
2.3. Set the customers corrections
The customers corrections allow to check that the GP500 measures and generates correct values. The values measured
and generated by the GP500 are compared with a standard, and then can be corrected on the GP500.
Two types of generations can be performed :
● Internal generation : the device generates a pressure on the standard. The number of generated points and their
setpoints are not modifiable.
● External generation : the device generates a pressure on the standard. The number of generated points and their
setpoints are defined by the user.
➢ Press on “Param.”.
➢ Go to the line “Customer corrections” then press on OK.
➢ A frame displays on screen, with the keys enter the code 0101 then press on OK.
The menu “Customer corrections” displays on screen.
8 Use of the GP 500
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