MIL-HDBK-740
(d) Wash solution pressure gage (Multiple). - A reading of 4 to 6 psi (measured at the wash manifold) on the gage dial indicates that the operating pressure is being achieved.
(e) Rinse water pressure gage (Multiple). - The operating pressure is a reading from 4 to 6 psi (measured at the work manifold) on the gage dial.
(f) Final rinse water pressure gage (Multiple). - The operating pressure should be maintained at 20 pounds per square inch. (A suitable readily accessible valve with a 1/4 inch IFS connection shall be provided immediately adjacent to the supply side of the control valve in the line carrying final rinse water to the dishwashing machine.)
(g) Detergent concentration meter (Single, Multiple). - Dishwashing machines may be equipped with a detergent concentration meter (Figure 8) which indicates but does not control the concentration of the dishwashing solution in the wash tank. The detergent concentration meter should conform to the requirements specified in MIL-M-11495, Meter, Detergent
Concentration, for Dishwashing Machine. The installation facilities engineer should be contacted to clean the electrodes of the detergent concentration meter when coated with lime deposits. The installation and adjustment of
the meter should be made by installation facilities engineer in accordance
with the instructions furnished with the meter. The meters should be adjusted so that the needle is in the middle of the green area when the detergent concentration of the wash solution is between 0.20 and 0.25
percent by weight.
Figure 8 - Detergent Concentration Meter
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