2 308847
Installation
Install the pulse meter as instructed in your system
manual.
RC Filter
An RC Filter (Graco Part No. 113837) is sent with the
pulse meter.
If the meter is used with the Horizon
t
system,
the RC
Filter must be installed as shown in the Horizon system
manual 308607.
If the meter is used with the Modular Fluid Commander
system,
the RC Filter can be discarded.
Service
To Inspect, Adjust, or Service Fluid Meter
Remove cover and proceed as follows:
To inspect or replace cam wheel,
pull up on cam to see
if it is loose; tighten both setscrews, if necessary.
Inspect cam for damage or wear. Loosen setscrews
and remove cam from shaft if damaged or worn. Install
new cam on shaft, then adjust micro-switch (see Fig. 1)
and install cover.
Fig. 1
TI1934A
Switch
Open
Switch
Closed
Micro Switch
Between Pins
On Top of Pin
Roller Arm
TI1933A
Switch
Setscrews
Cam Wheel
Mounting Screws
NOTE:
The normally open micro-switch must close
each time its roller rides over cam wheel lobes. A quart
meter has five lobes and a liter meter has ten lobes. To
find out if micro-switch is faulty or needs adjustment,
see below:
To check for a faulty micro-switch,
push switch roller
arm in all the way and use an ohmmeter or other
suitable instrument on soldered terminals of switch to
see if switch is closed. If not closed, remove switch,
install new switch, and adjust.
To adjust micro-switch,
loosen both cam wheel set-
screws. Rotate cam until switch roller rests on top of a
lobe, and use an ohmmeter or other suitable instru-
ment to see if switch is closed. If it is not closed, loosen
both switch mounting screws, move switch in until it
closes, rotate cam wheel until roller rests on cam
between two lobes, and check with ohmmeter to see if
switch is open. Tighten mounting screws where switch
opens and closes properly and install cover.
NOTE:
Do not bend micro-switch roller arm. If switch
cannot be adjusted properly, replace switch.
