Operating instructions

Charged Aerosol Detectors
Corona Veo and Corona Veo RS
Operating Instructions Page 71
5.7.3 Gas Supply Pressure Relief Valve
A pressure relief valve is installed at the gas supply inlet to prevent damage to the detector in
the event of a gas overpressure. If the gas inlet pressure exceeds 620 kPa (90 psi), the valve
will open to relieve the pressure and create a loud hissing sound. If the detector is in Run
mode, the detector will fail to pressurize and an error code will appear on the detector display.
Warning: If during operation the pressure relief valve is leaking or releasing
gas, immediately
Avertissement: Si lors du fonctionnement, la soupape de décharge est une fuite où
libérant des gaz, arrêtez le détecteur
shut down the detector.
immédiatement
To remedy the situation:
.
1. Turn off gas flow.
2. Clear the error code on the detector display and return to the Main Menu.
3. Shut down the gas supply to the detector.
4. Check the gas pressure that is supplied to the detector display. Adjust the gas pressure
so that the inlet gas supply pressure is in the range of 480 – 550 kPa (70 – 80 psig).
5. Turn on the gas supply.
6. If the gas pressure has fallen within the specified range, the gas pressure relief valve
will remain closed.
7. On the Main Menu, select the Gas soft key to pressurize the detector.
8. On the Main Menu, select the System Menu soft key.
9. In the System Setup Menu, select the Gas soft key to display the current gas pressure
value from the gas regulator.
10. Verify that the gas pressure has returned to the default setting.
11. On the display, return to the Main Menu.