4
For Electric Signalling
meter. As the magnet moves with the piston, its field
trips the proximity switch. An adjustment screw
changes the actuation point by moving the switch.
8 Watts @ 120 VAC/100 VDC. DO NOT EXCEED
300 MILLIAMPS BELOW 26 VAC/26VDC. Switch
has three wires: Black for normally open, blue for
normally closed, and white for common.
NOTE: Switch has a 25% of full scale operating
band. Within the band, the switch activates. Above
and below the band, the switch deactivates. Thus,
one switch can be used as a deviation alarm.
Model FL-505, FL-510, and FL-515 flow meters can be
equipped with one or two electric switches so that any flow
rate within the range of the
meter can be made to
trigger a signal (or signals).
Switch settings are easily
adjusted. They are
supplied in kit form for
installation in the field.
Order No. FL-500-R
I
.
Model FL-530, FL-540 and
FL-550 require switch kit
#FL-500-R2.
Each switch kit consists of a
ring shaped ceramic
magnet that fits around the
flow meter
piston, and a
proximity switch in a
housing that clamps to
the body of the flow
Step 1. Install the magnet. You must disassemble the flow
meter to do this. Follow instructions found under the
heading “Maintenance” on page 3. Remove piston from the
shaft and place the magnet between piston and spring.
Be sure that the piston is installed as in the drawing,
and the spring is seated on the magnet and piston.
Insert into tube and replace outlet end fittings.
Step 2. Install the foam gasket. It has an adhesive on one
side, covered with a protective paper. Peel off and press
the gasket firmly into place on the switch housing.
Step 3. Install the switch housing on the flow meter body.
(A) If you are installing only one switch, push the
capscrews through the switch housing tabs, and thread
them into the half-collars, as shown. Use the washers
provided. The nuts may be discarded.
(B) If you are installing two switches, match up the tabs on
the two switch housings and push the capscrews through
both collar tabs. Put the nuts on the threaded ends of the
capscrews and tighten. Use the washers provided. (The
half-collars and extra magnet may be discarded.)
SWITCH INSTALLATION
NOTE: There is no “wrong orientation” of the switch
housing. If you are installing two switch housings, they can
both be oriented the same way, as in the photo, or one “up”
and the other “down”. Install to suit your needs in wiring
and switch adjustment.
SETTING THE SWITCH POINTS
With flow meter installed:
Simply adjust the amount of flow to move the piston to the
level on the indicator where a switch signal is desired, then
turn the switch adjustment screw until switch actuates.
(Switch moves toward the adjustment screw head as you
turn it clockwise. Use an ohmmeter to determine actua-
tion.) Repeat for second switch, if you are using two
switches.
With flow meter NOT installed:
Simulate flow by pushing the eraser-end of a pencil (or a
similar tool) through the inlet end of the tube, contacting the
float, and moving it against the spring pressure until the
knife edge of the float is at the desired reading on the
scale. (If your unit has a 1/2 in. pipe fitting, remove it to
gain better access.) Then, turn the switch adjustment
screw till the switch actuates. (Switch moves toward the
adjustment screw head as you turn it clockwise. Use an
ohmmeter to determine actuation.) Repeat for a second
switch, if you are using two switches.
When connecting the switch wires, leave enough lead
length (as a pigtail) to allow full travel of the switch.
11
10
1
12
4
6
3
2
7
8
9
5
Insite Switch
Parts Description
1. Housing
2. Gasket
3. Magnet
4. Half-collars (2)
5. Capscrews (4)
6. Capscrew nuts (4)
7. Switch
8. Switch carrier
9. Adjustment screw
10. O-ring (2)
11. Retainer clip
12. Lockwashers (4)
INSITE Switch
Replacement Parts
MAGNET (ONLY)
Part # 1122
SWITCH (ONLY)
Part # 1127
SWITCH PARTS
DESCRIPTION
FL-500 SERIES SWITCH
REPLACEMENT PARTS
