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Part II - Adjustments
Models 126, 134, S126B, S134B: 3/16" & 1/4" open-end wrenches
Models 136-160, S136B, S160B, 680: 5/8" open-end wrench
Models 258-274, 354-364: 11/16" open-end wrench
Pressure Models
For set point adjustment, connect unit to a calibrated
pressure source. Remove cover and gasketing. The
adjusting screw, labeled "A" in Figures 1 & 2, is located
beneath the switch and is turned to adjust the set point.
Using the appropriately sized open-end wrench (see Tools
Needed above), turn the adjustment screw towards the
left (clockwise) to increase set point or towards the right
(counter-clockwise) to decrease set point.
Vacuum Models
For set point adjustment, connect unit to a calibrated
source. Remove cover and gasketing. The adjusting
screw, labeled "A" in Figures 1 & 2, is located beneath the
switch and is turned to adjust the set point. Using a 1/4"
open-end wrench, turn the adjustment screw towards the
right (counter-clockwise) to increase set point (towards full
vacuum) or towards the left (clockwise) to decrease set
point (towards 0 psig).
NOTE: For models 126-134 & S126B-S134B, use 3/16" open-end
wrench to keep item B (Figure 2) from turning.
Figure 1: Models 136-160, S136B-S160B, 258-274, and 354-364
Tools Needed
Models 218-230: 1/4" open-end wrench
Models 610-614: 3/16" open-end wrench
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Figure 2: Models 126, 134, S126B, S134B, 218-230,
610-614, 680
NOTE: Picture shows adjustable deadband switch option
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Adjustable Deadband Switch,
J6D Models and Option 1520
Units with this option are equipped with a special snap
switch that allows the deadband to be manually adjusted.
To adjust the deadband, turn the adjustment wheel on the
underside of the switch (item C in Figure 2), using the switch
mounting screw on the right as an index. As the letters
advance, the deadband widens.
Manual Reset Switches, 1530 Option
Units with this option incorporate a snap switch that, when
activated, remains tripped until the pressure drops and the
reset button (located on top of the enclosure) is manually
depressed to reset the switch.
Replace cover when all operations are complete and
before using.
IM6-02
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