Sentry Cobra M Sampler 7
7.
Turn sample valve clockwise to close when 75% of bottle is full
8.
When sample valve is closed remove bottle from shroud
9.
Place new bottle in shroud
Maintenance
Routine Inspection
The sampler should be checked periodically for proper operation and to ensure that any wear is detected for
preventive maintenance. A definite schedule of inspection should be established to ensure safe and accurate sampling
operation. Such inspection should include:
checking fittings for leaks
checking for signs of corrosion
performing a sample to ensure moving parts remain operable (this is particularly important in cases where the
station is not used frequently)
Needle Valve
Any blockages normally can be cleared by fully opening the valve. Care must be taken to ensure that temperature and
pressure limits are not exceeded during this process.
Valve Packing
Occasionally during initial startup or restart of the sample panel, the low pressure/high pressure inlet isolation valve
packing may leak. If this occurs, tighten the packing nut. If the packing continues to leak or other valves or o-rings
require maintenance, please see the Parts & Accessories list in this manual.
Sample Cooler
For installation and operating instructions for the sample cooler, please see the Installation, Operation & Maintenance
manual for Sentry sample coolers.
Carbon Canister
An optional Sentry carbon canister is available. The carbon canister assembly is designed to absorb hydrocarbon gases
vented from Sentry manual low-emission samplers.
The gas vent of the sampler panel is connected to the inlet of the carbon canister assembly. The gases then pass
through a volume of activated carbon, where hydrocarbons, such as benzene, are absorbed. Often, there are specific
gases, such as H
2
S – hydrogen sulfide – that also are carried in the vented gas. To remove these, specially designed
products such as impregnated activated carbon are used. In these instances, the carbon canister assembly is filled with
impregnated activated carbon.
Both activated carbon and impregnated activated carbon have a finite ability to remove hydrocarbons and other
gases. The life of the product is dependent on concentrations and volumetric flow of the gas. An optional “tell tale”
assembly can be provided with the carbon canister assembly to provide a visual indication of when the carbon
canister assembly requires recharging. The carbon canister assembly is designed for easy recharging. Instructions are
below.
