The following procedure describes process of
setting, reserve low pressure switch. This
procedure should only need to be performed if
reserve low switch setting was not within
acceptable limits during performance verification
procedure. Refer to Figure 19 and 20 for location
of components called out in this procedure.
1. Verify at least one high-pressure cylinder is
open on high-pressure reserve header.
2. Verify red “RESERVE LOW” light on power
supply is not illuminated.
3. Close liquid containers and high-pressure
cylinders on both banks of manifold.
4. Slightly open vent valve to create a small flow
of gas through manifold. Flow gas through
manifold until pressure on both manifold
banks has been depleted and red “RESERVE
IN USE” light on power supply illuminates.
5. Close high-pressure cylinder on reserve
header and adjust vent valve so that high-
pressure gauge on reserve header regulator
drops very slowly.
6. Note high-pressure gauge reading when red
“RESERVE LOW” light on power supply
illuminates. Recommended settings are listed
in Table 1, page 27 (Reserve Low Switch).
7. Close vent valve.
8. If switch adjustment is necessary, slide collar
of switch toward wires to access internal
adjustment barrel. Insert tip of small
screwdriver into adjustment barrel and rotate
barrel (Figure 26).
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Part No. 6-847703-00 Rev. C00
9. Slowly open one high-pressure on reserve
header.
10. Repeat steps 4 through 9 until pressure switch
has been set within acceptable limits.
11. Slide pressure switch collar back to original
position.
NOTE:
When viewing switch from wire end, rotating
barrel clockwise will raise switch setting. A
counterclockwise rotation will lower switch
setting. Make small adjustments and retest as
follows:
Reserve Low Switch Adjustment
Testing and Adjustments
