Siemens MicroSAM, Руководство по эксплуатации, Страница: 89 / 138

Service and maintenance
6.2 Replacing the carrier gas cylinders
MicroSAM
Operating Instructions, 06/2012, C79000-G5376-C560-07
87
6.2 Replacing the carrier gas cylinders
Procedure
1. Save the operating data before switching off;
refer to the software description "Maxum System Manager".
2. Switch the MicroSAM off.
3. Switch off the 24 V DC power supply.
4. Close the main cylinder valve.
5. Replace the cylinder.
6. Purge the pressure reducer several times.
7. Open the main cylinder valve.
8. Switch on the 24 V DC power supply.
9. Carry out the calibration.
6.3 Installing and removing electronic components
WARNING
Observe waiting time
Observe the regulations for explosion protection if the chromatograph is installed in a
hazardous area.
Before opening the housing in the hazardous area, switch off the power supply and then
always wait for at least 65 minutes.
Following this time, the surface temperatures within the chromatograph have cooled down
to a temperature corresponding to temperature class T4, and the electric charge of internal
components has dropped to a noncritical value.
CAUTION
Electrostatic-sensitive device
Before touching such components or devices:

Switch the chromatograph off.

Remove all static from yourself by touching an earthed object or by using an ESD
bracelet.
 Only use tools free of static charges.

Do not touch pins or printed conductors. Hold modules only by their edges.