The pressure switch and relief valve set point should be 2-3 bar gauge. The pressure switch
should be rated to withstand the full process pressure and temperature for a short time without
rupture.
CAUTION
Drain flow
Ensure the drain flow is safely contained away from personnel and other plant or equipment.
Mounting of pressure guard
CAUTION
Non-hazardous areas only
The mounting of a pressure guard is only permitted in non-hazardous areas.
CAUTION
Moisture, liquids or particles getting into the sensor enclosure
All sensors are filled with argon to avoid condensation. Ingress of moisture, liquids or particles
into the sensor may influence the measurement and in worst case inhibit the measuring
function.
• Avoid moisture, liquids or particles getting into the sensor enclosure
Install a pressure guard as follows:
1. Place the sensor in a dry, clean place and leave it to acclimatize until it reaches ambient
temperature, preferred 20°C (68°F) with low humidity (at least below 50% RH).
2. Orient the sensor with the purge ports uppermost to minimize loss of the argon gas filling.
3. Carefully disconnect the nipple (see
①
in graphic below) and mount the pressure guard. Use
the enclosed spare part sealing ring for proper sealing.
Make sure that the pressure guard does NOT touch any of the parts inside the sensor.
Maximum of 20 mm (0.79") insertion can be accommodated.
Installing/mounting
4.2 Installation instructions
SITRANS MASS 2100 & FC300 (FCT010/DSL)
38
Operating Instructions, 06/2020, A5E39788682-AB