Observation port

Wrap a coil of Primacord explosive, sometimes covered with black grease, around the camera observation port window safety glass outside the instrument shelter. Detonation of the explosive coil creates a dense black smoke cloud. This method is usually called a smoke shutter... 

Typically, the new pump oil is poured into the exhaust port, but check with your manual to verify this for your pump. The amount of oil required is dependent on the individual pump and should be stated in the pump manual. If you cannot find the manual and have to wing it, pour slowly and allow ample time for the oil to show up in the observation port. 

Filter Stick. A typical filter stick for solution filtration is shown in Figure 4. A section of teflon tubing (2-3 ft) is pushed over the Luer fitting of an observation port (Popper Sons), and conventional filter paper is then attached to the end of the observation port as shown. Half inch teflon sealing tape (Aldrich - this may also be available from a local plumbers supplier as pipe dope) is first wrapped around the base of the observation port, filter paper is then wrapped around the outside of the teflon tape, and one or two loops of nichrome wire (20 gauge, 32 thou) are used to secure the filter paper in place. The teflon tape provides a bed into which the wire can bite and seal the system. Any filter paper may be used, but we have found water resistant fine filter papers such as Whatman s 50 to be most satisfactory, except for gummy solids which may require a faster paper. 

Figure 4. Conversion of an observation port into a filter stick. The luggs can be sawed off the Luer fitting on the observation tube to make a more streamlined apparatus. A second loop of nichrome wire may be convenient to prevent leakage.

Fig. 340. Preparation of active metal oxides by oxidation of metal vapor, a funnel for addition of metal b observation port c side port d circular nozzle for air intake e first chamber with lateral observation ports (these are not shown) f illuminating device g glass tubes (the remaining parts of the apparatus are made from sheet iron) h carbon electrodes i flow meter activated by differential pressure n precipitation cell s movable carbon electrode.

WHEN FURNACE IS NOT IS USE, remove this observation port and tie it to this tag. O CLEAN OUT hole through wall very well. 

Clean glass (both sides), leave tag attached, and REPLACE OBSERVATION PORT, hand tight. 

Doors should be checked often and repaired promptly because hot gas leaks can lead to mnaway ruin quickly. Seals around doors and car hearths need frequent repair or replacement. Doors should be checked for warpage and loss of refractory. Doors that are not used should be bricked up, but with addition of an observation port (with closure on a chain) and closure for monitoring furnace conditions during firing. If there are any gaps between doors and stationary furnace elements exceeding in. (3 mm), they should be adjusted for less leak. 

Wherever possible, ultraviolet radiation should be contained . If visual observation of any process is required, this should be through special observation ports transparent to light but adequately opaque to ultraviolet radiation. Where the removal of covers could result in accidental injurious exposures, interlocks should be fitted which either cut the power supply or shutter the source. Protection is also achieved by increasing the distance between source and person, covering the skin and protecting the eyes with goggles, spectacles or face shields. 

Direct measurement of foam volumes in typical dishwashing machines is usually not possible because of the absence of an observation port. Effectiveness of foam control is therefore inferred from either measurement of the pump pressure or the speed of rotation of the spray arms. The latter can be measured using, for example, magnet and inductive sensors at the extremities of the spray arms [106]. 

Figure 1. Schematic diagram of the oxygen side blow furnace 1. Groundsill, 2. crucible, 3. nozzle, 4. first floor water jacket, 5. second flow water jacket, 6. third flow water jacket, 7. top water jacket, 8. feed inlet, 9. flue, 10. forth floor water jacket, 11. crucible water jacket, 12. observation port, 13. brick, 14. wall water jacket, 15. slag tap, 16. overflow, 17. siphon well cover, 18. safety port...

The trials have been done in a stainless steel chamber, or cell, of 32 cubic metres (see figure 1). equipped with two observation ports, and a cutting bench motorized on the X and Y axes (see figure 2). 

The ovens in a slot-type byproduct coke oven battery are separated by the heating walls. The heating walls consist of a series of vertical and separate chambers called flues. A single heating wall can have from 24 to 34 flues. A mixture of preheated air and a fuel gas is introduced into the bottom of these flues. The combustion of this mixture inside the flue heats the wall from the inside, thereby heating the ovens separated by the walls. Each flue on each wall is equipped with an observation port or inspection hole on the battery top. Through these inspection holes, the conditions inside the flue can be observed and/or measured, for example, flue temperature. A battery can have nearly any number of ovens, from as few as 30 or 40, to as many as 70 or 80. There is always one more heating wall in a battery than there are ovens in a battery. 

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