Dwyer TTM User Manual

Bulletin F-41-TTM

Series TTM Totalizing Flowmeter

Specifications - Installation and Operating Instructions

Measure batch and cumulative totals in liquid transfer systems

with the Series TTM Electronic totalizing Meter. The meter is
designed for any pump, pressure, or gravity feed system with a 3
to 30 GPM (10 to 100 LPM) flow range. View batch and
cumulative totals on the large 4-digit LCD display . Batch totals can
be reset to measure flow during a single use. The cumulative total
will automatically reset to zero when a maximum reading of 9999
is obtained. Models designed for use in water applications are
constructed of Nylon and rated to 150 psig (10.3 bar). Aluminum
models are calibrated for fuels and rated to 300 psig (20.7 bar).

GENERAL INSTALLATION

Battery Connections

1. Remove the four Phillips-head scr ews and lift the faceplate from
meter.

2. Remove tape from the end of one battery.

3. Replace the battery. Make sure the positive post is in the
correct position.

4. Make sure the O-ring is fully seated and secure the faceplate
with the four screws.

Calibration

The meter is permanently factory calibrated for measuring water or
fuels depending on model. If installed and used correctly,
inaccuracies of no greater than ±5% will be obtained.

Installation

This meter may be installed in-line either vertically or horizontally or
at the end of a hose adjacent to a nozzle if present.

4-1/8

[104.78]

TOTALIZING METER

DISPLAY

DWYER INSTRUMENTS, INC.

MICHIGAN CITY, INDIANA 46360 U.S.A.

ELECTRONIC

1˝ NPT

TYP

2-1/2

[63.5]

2-9/64

[54.37]

SPECIFICATIONS
Service: Compatible liquids.
Flow Range: 3 to 30 GPM (10 to 100 LPM).
Wetted Materials: Bearings: Ceramic; Shaft: Tungsten Carbide;

Rotor: Nylon 6-6; Rings: 316 SS; Body: TTM10, 11: Nylon 6-6,
TTM20, 21: Aluminum; Other: TTM20, 21: Ceramic Magnet.

Accuracy: ±5%.
Batch Total Maximum: 9,999.
Cumulative Total Maximum: 9,999.
Temperature Limits: 14 to 130°F (-10 to 54°C).
Pressure Limits: Nylon models: 150 psig (10 bar); Aluminum

models: 300 psig (20 bar).

Pressure Drop: 2 psi (0.14 bar) @ 30 GPM (100 LPM).
Maximum Particulate Size: 350 microns.
Display: 4-digit LCD, 5/8˝ H.
Auto Shut-off: After 1 minute.
Connections: 1˝ female NPT.
Power: Two AAA alkaline batteries (included).
Battery Life: Approx. 9,000 hours.
Weight: Nylon models: 0.4 lb

(190 g); Aluminum models: 0.7 lb (340 g).

Agency Approvals: CE.

Model No. Application Body Material Units

TTM10 Water* Nylon Gallons
TTM11 Water* Nylon Liters

TTM20 Fuels
TTM21 Fuels

*Calibrated for use with water; †Calibrated for use with gasoline, diesel fuel and kerosene

†
†

Aluminum Gallons
Aluminum Liters

NOTE: If using the Nylon meter for measuring water, it is not
recommended to install with metal connection or fittings. Install as
follows:

1. If necessary, remove nozzle from hose.

2. Wrap all connections with 3 to 4 wraps of Pipe Thread Sealant
Tape. Ensure the tape does not intrude into the flow path.

3. Attach meter to hose or plumbing with the arrow on the outlet
port pointed in the direction of flow.

4. If necessary, attach nozzle to meter.

5. hand tighten the meter at the housing ends. Do not use a
wrench or similar tools to tighten the meter housing. The housing
may be damaged.

DWYER INSTRUMENTS, INC.

Phone: [phone] www.DWYER-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

OPERATION
Batch and Cumulative Totals

The meter maintains two totals. The batch total may be reset to
measure flow during a single use. The cumulative total provides
continuous measurement and my not be manually reset. The
batch total is labeled TTL 1. The cumulative total is labeled TTL2.

When the cumulative total reaches a maximum reading of 9999, it
will automatically reset to zero.

Press the DISPLAY button briefly to switch between the batch and
cumulative totals.

Activate the Meter

Turn the meter ON by starting flow or briefly pressing the DISPLAY
button. The meter will display the batch or cumulative total from
last use.

Press DISPLA Y briefly to display the batch total. Hold the DISPLAY
button down for three seconds to reset the batch total to zero.

Battery Replacement

The meter is powered by two AAA alkaline batteries which may be
replaced while the meter is installed. When batteries are removed
or lose power , the batch and cumulative totals reset to zer o but the
factor calibration is retained.

If the meter display becomes dim or blank, replace the batteries as
follows:

1. Remove the four Phillips-head scr ews and lift the faceplate from
meter.

2. Remove the old batteries and clean any corrosion from the
terminals.

3 Install new batteries. Make sure the positive post is in the

correct position.

4. When batteries are replaced, the faceplate will power ON.
Check the display to ensure normal functions have resumed
before assembling again.

The meter is programmed to turn off automatically if not used for
more than one minute.

MAINTENANCE

Proper handling and care will extend the life and service of the
meter.

Turbine Rotor

The meter is virtually maintenance-free. However, it is important
the rotor moves freely. Keep the meter clean and free of
contaminants.

If the rotor does not turn freely, apply a penetrating lubricant on the
rotor, shaft, and bearings. Remove any debris or deposits from the
rotor using a soft brush or small probe. Be careful not to damage
the turbine rotor or supports.

CAUTION: Blowing compressed air through the turbine
assembly could damage the rotor.

5. Reseat the batteries, if necessary , and position the faceplate on

the turbine housing. To avoid moisture damage, make sure the O­ring is fully seated. Tighten the four screws on the faceplate.

If the unit should need repairs, please contact Dwyer Instruments,
Inc. before returning unit to review information relative to your
application and obtain a return authorization number. When
returning a product to the factory, carefully package and ship
freight prepaid. Be sure to include a complete description of the
application and problem and identify any hazardous material used
with the product.

MAINTENANCE

Upon final installation of the Series TTM Totalizing Flowmeter, no
routine maintenance is required. A periodic check of the system
calibration is recommended. The Series TTM is not field
serviceable and should be returned if repair is needed (field repair
should not be attempted and may void warranty). Be sure to
include a brief description of the problem plus any relevant
application notes. Contact customer service to receive a return
goods authorization number before shipping.

©Copyright 2007 DYER Instruments, Inc. Printed in U.S.A. 2/07 FR# R2-443088-00 Rev 1

DWYER INSTRUMENTS, INC.

Phone: [phone] www.DWYER-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]