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Establish a known flow rate through the meter corresponding to approximately 90% of full
scale and observe the meter indication. Move the cam follower up to decrease the pointer
indication or down to increase the pointer indication.
To move the cam follower up, rest a screwdriver on the cell block with the blade between
the cell block and the center shaft. Pry gently up on the cam follower. To move the cam
follower down, place a screwdriver on the top of the cam follower. With the blade resting
against the case press gently down. Take care not to put excessive forward pressure on
the cam follower to prevent the "C" clip on the pivot shaft from coming off. Rezero the meter
using the cam nut.
Cam Follower Adjustment
Figure 7
Check meter indication at 50% of full scale. Meter should indicate actual flow rate within
3% of full scale. If meter does not indicate actual flow, consult factory.
4.7
Cleaning of Pressure Ports
Remove the meter housing from the body by removing 4 screws. Remove the pulsation
snubbers from the body by inserting a small wood screw into the hole in the pulsation
snubbers and gently pull them out. Clean passages in body and snubbers and reassemble.
If you are unable to clean without further disassembly, the meter should be returned to the
factory for service.
Reassemble the meter housing to the body in the desired viewing position. Take care to
properly seat the inner and outer o-rings before tightening screws.
4.8
Adjustment of Reed Switches
Check the meter zero and correct if necessary using the coarse or fine zero procedure
before proceeding. Connect continuity tester to N.O. contact. Loosen the switch clamp.
Establish the desired flow rate for switch tripping. Slide switch to left most position.
Range window should show a partial or complete green mark.Slowly slide to right while
monitoring N.O. contact. Switch will close. Continue to slide to right. Switch will open
(false trigger). Continue to slide to right until switch closes again. Adjust by sliding to
right to raise setpoint, left to lower. Tighten clamp. Note: Tiny adjustments may be re-
quired to reach the desired set point.
4.
Operation
and
Mainte-
nance
(Continued)
INCREASE
INDICATION
DECREASE
INDICATION
CAM
FOLLOWER
Reed Switch Adjustment
Figure 8
adjustment clamp screws
terminal strip
set point range windows
