Further Information On The Gas Connection; Electrical Connections; General Safety Instructions - Siemens SIPROCESS GA700 Compact Operating Instructions

Connecting

5.2 Electrical connections

5.1.7

Further information on the gas connection

It is essential that you observe the following points for trouble-free operation:
• When tightening the union nuts at the gas couplings, ensure that you counter properly in
order to achieve a tight gas path.
• When removing purging gas ensure that the pressure drop via the exhaust air line does not
result in the following components switching off:
- Ex p safety equipment during the pre-purging phase
To achieve this, the exhaust air line must be dimensioned accordingly (for example with an
inner diameter of G 1", the length of the exhaust air line may be about 20 m).
• Always adhere to the pre-purging time that can be set at the Ex p safety equipment!
The pre-purging time amounts to 10 minutes at a purging gas flow rate of 60 l/min.
• Do not supply sample gas to the analyzer until the pre-purging phase has ended.
• OXYMAT 7: Before sample gas is supplied, the microflow sensor must be reliably flushed by
reference gas.
The reference gas must therefore also be connected (pre-purging period = 10 min) when the
Ex p safety equipment is switched on.
Note that the reference gas pressure must always be 2 bar ± 0.1 bar above the sample gas
pressure.
5.2 Electrical connections
5.2.1

General safety instructions

Incorrect electrical connection
Danger of electrocution
• Connect the device to the power supply in accordance with the technical specifications.
• At the mounting location of the device observe the applicable directives and laws for
46
- Analyzer during the operating phase
WARNING
The information about proper electrical connection is available in section "Technical
specifications (Page 83)".
installation of electrical power installations with rated voltages below 1000 V.
Devices in explosion-proof design
Compact Operating Instructions, 01/2022, A5E35134047-11