Red Seal Measurement neptune MP Operating instructions

M-150
Rev. D
MP Oscillating Piston Flowmeters:
1/2” Type MP
1” Type MP
2” Type MP
3” Type MP
Operating and Maintenance Manual for
MP Oscillating Piston Flowmeter
Sold & Serviced By:
Don Johns, Inc.
701 N. Raddant Rd.
Batavia, IL 60510
Ph: [phone]
www.donjohns.com

TABLE OF CONTENTS
DESCRIPTION PAGE
General Information .....................................................................................1
Installation ....................................................................................................1
Calibration .......................................................................................................2
Register Maintenance......................................................................................3
Pulsmate Electronic Register ..........................................................................3
800 Series Register.........................................................................................4
1” MP w/Double Trip Auto-Stop Valve .............................................................5
2” MP w/Single Trip & Double Trip Auto-Stop Valve .................................... 6-8
3” MP......................................................................................................... 9-13
600 Series Register.......................................................................................14
Operational Checks.......................................................................................15
Gear Train Maintenance ................................................................................15
Cleaning the Flowmeter.................................................................................16
General Maintenance ....................................................................................17
Troubleshooting.............................................................................................18

GENERAL INFORMATION
This manual is intended to be a guide for the proper operation and maintenance
of the 1/2”, 1”, 2” and 3” MP Flowmeters and accessories, as described in Form
TS-150.
The MP Flowmeter is a carefully designed owmeter based on the tried and
true oscillating piston principle and incorporates the very best materials and
design features available. In the MP Flowmeter, an oscillating piston is contained
within a rugged main housing which also serves as the measuring chamber. This
approach simplies the design and minimizes owmeter maintenance.
The oscillatory motion of the piston rotates a drive arm which is part of a
magnetic drive assembly contained within the cover of the owmeter. The rotation
of the magnet in this assembly causes rotation of a similar magnet in either an
external gear train or in a totalizer register.
Various readout options and accessories are available.
INSTALLATION
Please review the following installation guidelines carefully before installing
your owmeter. Afterwards, if you have questions or concerns, please contact
your local RSM distributor for assistance.
STRAINER
Plan the installation in such a way as to allow a strainer to be coupled directly
to the inlet of the owmeter. Where this is not possible, any piping before the
owmeter should be thoroughly cleaned out. The use of at least a 40 mesh
strainer is required to validate the warranty.
Be careful to allow room for easy removal of the strainer basket.
AIR/AIR RELEASE
The presence of air in the system can cause overspeeding and damage to the
owmeter. Air will also cause the register to over record. The use of an air release
will assist in preventing these problems. Also, the use of a venting valve will aid in
preventing air related problems during start-up of ow.
Air releases cannot be supplied for all liquids, but where an air release valve
is used, it should be installed in a position as close as possible to the inlet of the
owmeter. This will insure the removal of the greatest amount of air from the liquid
before metering.
VALVES
The metering system should be furnished with and controlled by a shut-off
valve on the downstream side of the owmeter to insure that the piping and
the owmeter are lled at all times. A valve is needed to operate ow to avoid
overspeeding in most installations.
CONNECTIONS/PIPING
Use pipe compound sparingly on male threads only.
A bypass connection installed around the owmeter should be monitored
frequently since the valve in such a bypass may eventually leak, work open, or
be left open.
GENERAL MAINTENANCE
INSTALLATION
Before Installing the Flowmeter
Piping
1/2”, 1”, 2” AND 3” MP FLOWMETERS
Page 1

When Installing
Cleaning the Strainer
CALIBRATION
Erratic Registration
Consistent Over- or
Under-Registration
Secure the connecting piping rmly to prevent strain on the owmeter casing. Use
self-aligning couplings and expansion joints in long piping runs to allow for expansion
and contraction caused by temperature changes.
Provide the metering system with means for pressure and relief or escape of
trapped liquid caused by temperature expansion. Pressure build-up can be eliminated
by the use of valves equipped with pressure relief at selected sections of line that
may be blocked between valves. If the owmeter is to be operated under extremes of
environment (dirt, dust, water, freezing, etc.) an enclosure or other protection should
be provided.
Thoroughly clean system and all piping, especially on the inlet side of the owmeter.
When possible, install a length of pipe (spool-piece) in place of the owmeter and ush
out the piping thoroughly before the owmeter is installed. The majority of service calls
on new installations are eliminated if these directions are followed.
Connect the owmeter so that its inlet and outlet are correctly located. (These are
clearly marked.) Do not install the owmeter backwards. Should it be necessary to
change the direction in which the register will face, turn it as described under “Register
Maintenance.”
When the installation is still new, clean the strainer frequently. After the system has
had a chance to be thoroughly ushed out, only periodic cleaning is necessary.
CALIBRATION
When checking the calibration of the owmeter, use a calibrated test measure of
sufcient size that the owmeter will operate at a normal ow rate for at least one
(1) minute. For checking this owmeter, use a 10 gallon volumetric test measure of
approved design (for 1/2” meter) or use a 100 or 300 gallon volumetric test measure of
approved design (a container with a conical upper portion terminating in a long narrow
neck that is tted with a sight gauge.)
Erratic registration is an indication of trouble in the system, and is usually caused
by air or dirt in the measuring chamber. Do not try to correct this by recalibrating the
owmeter, but rst check for the presence of air in the line; then, if the trouble has not
been found, clean the owmeter as directed.
Over-registration is an indication of air, whereas under-registration is generally
caused by dirt or pipe scale in the measuring chamber, by the liquid bypassing the
owmeter in some manner, or by a damaged or worn internal mechanism.
Consistent over-registration or under-registration indicates need for recalibration.
See Form TSG-310 for recalibration procedures. These forms can be obtained from
your nearest RSM distributor, or contact RSM, Inc., 1310 Emerald Road, Greenwood,
SC 29646.
Page 2

REGISTER MAINTENANCE
PULSMATE ELECTRONIC
REGISTER
Removing the Pulsmate from the
Meter
MAINTENANCE
REGISTER MAINTENANCE
Register parts are such that only minor eld repairs are advisable. When
a register is in need of extensive service or repair other than that for which
instruction is given here, it is recommended that the register be returned to the
nearest RSM distributor for repair. If a replacement register is needed, be sure to
specify the exact model of the register replaced as well as the change gears in
the register. See parts lists, forms: P-390 and P-300.
PULSMATE ELECTRONIC REGISTER
1/2” MP METER:
Remove the set screw from the Pulsmate and twist the register 1/8“ turn counter
clockwise to release the retaining spring. The Pulsmate is now free and can be
withdrawn from the meter cover. The Pulsmate can be remounted in any one of 4
positions at 90º intervals on the meter cover.
1”-3” MP METER:
The Pulsmate is xed to the meter cover by 2 clamp rings secured by 4 bolts. To
remove the register from the meter, loosen the screws and disengage the clamp
rings from the groove in the Pulsmate body. The Pulsmate can be positioned at
any angle prior to clamping to the meter cover.
PULSMATE MAINTENANCE
The only scheduled maintenance for the PULSMATE register is periodic
replacement of the battery.
Battery Replacement:
The PULSMATE has a battery monitor feature that illuminates when the lithium
battery voltage approaches its end of life. A descriptor “BAT”, illuminates when
the battery voltage falls below this predetermined value. The low battery detector
operates correctly with all power options.
The battery should be replaced within several weeks of the rst occurrence
of low battery warning, “BAT”. Left unattended, the unit may become
inaccurate, cease to operate or loose setup information or malfunction.
For additional Pulsmate Electronic Register information, see form M-302. This
form can be obtained from your nearest RSM distributor, or by contacting RSM,
Inc.
Page 3

800 SERIES REGISTER
To Remove Register From
Flowmeter
To Clean Register Masks
TO ROTATE THE REGISTER
Figure 1
800 SERIES REGISTER
Loosen the two clamp screws on lower front of the register. Lift the register off. On
Auto-Stop models the valve linkage must rst be disconnected. (Remove cotter pin
and washer at valve end.)
When one register is removed and another substituted, (1) Check the number of
teeth on the change gears. They must be the same as the gears on the old register
and on the same respective spindles. The number of teeth is stamped on each
gear. To remove these gears, close the split end of the spindle with a pair of pliers and
pull off the gear. After putting on a gear, spread the end of the spindle slightly. (2) If a
gear shifter ins installed, make sure that the position is the same on the new register
as on the old one. Each hole is lettered for convenience.
Register masks are made of plastic and require special treatment. Instructions for
cleaning are given below:
If the mask becomes soiled with grease and oil, solvents for these substances,
such as kerosene or naphtha, may be used to remove dirt. However, sprays that are
commonly employed in cleaning glass windshields must not be used as cleaners.
A water solution of nonabrasive soap is recommended for washing grease, oil or
dirt from the mask. It is then cleaned by rubbing gently with a soft cloth, in a manner
similar to cleaning window glass, rinsing the mask in clean water, and nally drying.
Scouring cleanser and similar material must not be used in cleaning the mask, since
they contain abrasives that scratch the surface.
The use of solvents, such as acetone, ethyl acetate, benzene and ethylene
dichloride to brighten the surface of the mask is never recommended since these
substances soften the surface of the plastic.
Note: Large magnetic drive assembly accompanies 800 series register.
TO ROTATE REGISTER (1” & 2” MP)
When the owmeter is assembled as a Left Hand assembly and it is desired to
change it to a Right Hand assembly, or vice versa, proceed as follows:
Page 4

1. Remove cotter pins (E) from valve linkage.
2. Unscrew the outside register link lock nut (P) and remove connecting rod
(G).
3. Remove register link (N), rotate 1/2 turn and reassemble onto register as
described in appropriate valve adjustment instructions (Page 6).
4. Loosen two clamp screws on lower front of register up and turn register
180º.
5. Remove four handle housing assembly hex screws (C) and remove
handle housing assembly from valve.
6. Remove valve handle set screw (B) and slide handle off bushing.
Remove two cam retaining screws (not shown). Remove shaft seal
plug (D). Disassemble valve operating shaft and valve operating cam.
Reassemble valve operating shaft and install valve operating cam in
the reverse direction. Reinstall two cam retaining screws and shaft seal
plug. Reinstall housing assembly with valve operating cam acting on pilot
rod. Secure with four hex screws (C). Reassemble valve handle (A) on
knurled knob in position as shown for specic assembly.
After completing the above instructions, the valve linkage must be adjusted
in accordance with the procedure for the specic type valve as outlined on the
following pages.
1” MP FLOWMETER WITH SINGLE TRIP AND DOUBLE
TRIP AUTO-STOP VALVE
Note: Before any adjustment of the Double Trip or Single Trip Auto-Stop Valve
is made, be sure that the Auto-Stop setting wheels indicate a quantity, other than
zero, to insure that the trip mechanism of the register is in proper position.
To Adjust Double Trip Valve Linkage With Valve At Outlet of Flowmeter
(See Figure 2)
1. Depress the emergency stop button on the register and turn the shaft (O)
clockwise (as viewed from rear of register.)
2. Assemble register link (N) on knurled knob in position as shown for
specic assembly. (See Figure 2). Arm should move an equal distance
each side of vertical center line (M) (Angle x=x).
3. Assemble one nut (P) on connecting rod (G) and the other end of the
connecting rod to the center hole in handle (A) using washers and cotter
pins (E).
4. Open valve all the way. Turn shaft (O) counter clockwise to latch up
mechanism. With valve held open, tighten nut (P) against register arm
link. Then assemble and tighten second nut at (P).
5. Depress the emergency stop button and allow the valve to close. At this
point the linkage between the valve and the register must be free. If it is
not, the above adjustments must be rechecked.
6. Set the register to deliver the minimum quantity and open the valve to run
product through the owmeter.
7. After the initial trip occurs the valve should close to the intermediate ow
position. This rate will vary depending on product metered. If the valve
closes too far, or all the way, adjust nuts (P) to provide additional rod
length.
1” MP FLOWMETER WITH
SINGLE TRIP AND DOUBLE TRIP
AUTO-STOP VALVE
Adjustment of 1” Double Trip
Auto-Stop Valve
Page 5

8. It is sometimes necessary to change the position of the handle. This can be
done by loosening handle screw (B) and repositioning the handle as follows:
If the register mechanism will not latch up, position the handle further toward
the register. If the valve will not close, the handle may be positioned away
from the register. Fine adjustments may be made by changing the effective
length of connecting rod (G) utilizing nuts (P). The rod length (G) may also be
varied by positioning the end of the rod in the upper or lower holes in the valve
handle.
9. The Auto-Stop strip adjusting screw should be near its mid-position. (Also see
page 14 “To Adjust the Tripping Point,”)
2” MP FLOWMETERS WITH SINGLE TRIP
AND DOUBLE TRIP AUTO-STOP VALVES
In determining whether the metering unit is a Right Hand or Left Hand Assembly, the
position of the outlet of the owmeter as the operator faces the front of the register, is
the governing factor.
When the owmeter is assembled as a Left Hand Assembly and it is desired to
change it to a Right Hand assembly, or vice versa, proceed as follows:
1. Remove clevis pin (E) from valve linkage.
2. Unscrew the outside register link lock nut
(P) and remove connecting rod (G) and
clevis (F) as a unit.
3. Remove register link (N), rotate 1/2
turn and reassemble onto register as
described in appropriate valve adjustment
instructions. (Pages 7 & 8.)
4. Loosen two clamp screws on lower front
of register, lift register up and turn register
180º.
5. Remove operating shaft cap screw (C) on
both sides.
6. Interchange connecting rod arm (H)
and valve operating handle (A). The connecting rod arm must be assembled
with notches (J and K) in specic relationship. (See item 3 of valve adjustment
instructions for details regarding position of notches.)
7. Reassemble operating shaft cap screws (C).
Figure 2
2” MP FLOWMETERS WITH
SINGLE TRIP AND DOUBLE
TRIP AUTO-STOP VALVES
To Rotate the Register
Figure 3
Page 6