TPI 623 Instruction Manual

623

Digital Manometer

Instruction Manual

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Table of Contents

Page 3 Introduction & Product Description

Page 4 Safety Considerations

Page 5 Technical Data & International Symbols

Page 6 Features & Benefits

Page 7 Pressure Conversion Table

Page 8 Step by Step Procedures

Page 10 Accessories & Specifications

Page 11 Maintenance

Page 12 Trouble shooting guide

Page 13 EC declaration of conformity

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Introduction

Congratulations

Thank you for purchasing TPI brand products. This
meter is easy to use and is built to last. It is backed
by a 2 year limited warranty. Please remember to
return your product warranty registration card.

Product Description

The TPI 623 is a hand held pressure meter with supe­rior resolution .

Auto Range -100.0 to -100.0 mbar

-40.0 to 40.0 inH2O
Resolution 0.001 inH2O / 0.01 inH2O
Accuracy < +/-2 inH2O: ±(0.02 inH2O)

> +/- 2 inH2O: ±(1% of reading)
Over Pressure Protected to 50 inH2O
Power Supply 9V

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Safety Considerations

WARNING: Please follow the manufacturer's test
procedure whenever possible. Make sure the
pressure to be measured is not outside the range
of the TPI 623 meter.

AL

WAYS

• Test the pressure meter before use to ensure it
is operating properly

• Ensure that the connecting hose you are using
is free from kinks or splits

• Double check all connections before testing

NEVER

• Connect the Instrument to an unknown pres-

sure source if the source is twice the working
pressure of the instrument the sensor will be
damaged and may cause injury to the user

• Tamper with the instrument or attempt to

modify it in any way. Otherwise, accident and
injury may occur and the warranty becomes
void.

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Technical Data

Controls

Turns the 623 on. Hold down to turn unit
off.

ZERO Momentarily press the button to

“ZERO” the dispaly (“ZERO” will temporari­ly display in the lower left of the LCD)

= Smoothing function to stabilize rapidly

changing pressure readings

UNITS Selects 7 units of pressure kPa, PSI, inHg,

mmHg, inH2O, mmH2O, mbar

Turns the back light on (automatically turns
off after 30 seconds)

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Features & Benefits

Autoranging - Provides high resolution &

accuracy at low

Auto Power Off - Powers off after 40 minutes to

conserve battery life.

Trim Mode - Smoothing function to stabilize

erratic readings. It displays the
average value of 4 values
previously measured.

Zero Function - Provides immediate push button

zeroing for Speed and accuracy.

Units - Change the display value in any

one of the following engineering
units. kPa, PSI, inHg, mmHg,
inH20, mmH20 and mbar.

Back Light - Provides easy reading of LCD in

low light areas.

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Atmos bar inHg

inH2O

PSI mmHg

mmH20

Pascals

Atmos 1

9.86923
x 10

-1

3.34207
x 10

-2

2.458
x 10

-3

6.8046
x 10

-2

1.316
x 10

-3

0.9677
x 10

-4

9.869
x 10

-6

bar

1.01325

1

3.3864
x 10

-2

2.491
x 10

-3

6.8948
x 10

-2

1.333
x 10

-3

0.9807
x 10

-4

1.000
x 10

-5

inHg

29.9213 29.53

1

7.355
x 10

-2

2.036

3.937
x 10

-2

2.89567
x 10

-3

2.953
x 10

-4

inH2O

406.8 401.48 13.60

1

27.68 0.5354

3.937
x 10

-2

4.014
x 10

-3

PSI

14.6955 14.504 0.4912

3.6127
x 10

-2

1

1.934
x 10

-2

1.422323
x 10

-3

1.4503
x 10

-3

mmHg

760 750.06 25.400 1.868 51.715

1

7.35433
x 10

-2

7.502
x 10

-3

mmH2O

10.3327
x 10

3

10.1976
x 10

3

3.4544
x 10

2

25.400 703.07 13.599

1

.101972

Pascals

1.01325
x 10

5

1.000
x 10

5

3.386
x 10

3

2.491
x 10

2

6.8948
x 10

3

1.333
x 10

2

9.8071

1

Pressure Coverstion Table

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Step by Step Procedures

Note:

The 623 incorporates a differential manometer.
This means when a single hose is connected to
the (+) port and pressure is applied, the 623 will
read positive pressure. If a single hose is con­nected to the (-) port and pressure is applied,
the 623 will read a negative pressure. If both
ports are connected to a pressure, the 623 will
read the difference (P1 - P2) between the two.

When performing single pressure measurments
(non-differential) use the positive port and leave
the negative port open.

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Step by Step Procedures (continued)

1. Press the 'ON' key and the LCD display will be
activated and automatically zeroed (if it does not
read 0.00 proceed as follows

2. Momentarily Press the key and the display
should zero within +/- 0.01 if not repeat until it
does

3. Connect pressure meter to installation or
equipment to be tested using appropriate hose
connection in accordance with the manufacturers
instructions

4. The pressure reading will appear on the display.
To activate the backlight in poor light conditions
press the key at any time

5. If the reading is erratic or changing activate the
smoothing function by pressing the '=' key

6. To convert the displayed pressure reading to
another engineering unit depress the 'UNIT' key
anytime and scroll through to the desired units of
pressure.

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Accessories & Specifications

Standard accessories

9V battery . . . . . . . . . . . . . . . . . . . . . .A009

Soft Pouch . . . . . . . . . . . . . . . . . . . . . .A600

Protective boot with magnets . . . . . . . A6XX

Silicone tubing w/ 1/4” barbed

1/8” NPT fitting. . . . . . . . . . . . . . . . . . A603

Specifications

Auto Range -100.0 to -100.0 mbar

-40.0 to 40.0 inH2O
Resolution 0.001 inH2O / 0.01 inH2O
Accuracy < +/-2 inH2O: ±(0.02 inH2O)

> +/- 2 inH2O: ±(1% of reading)

Over Pressure Protected to 50 inH

2

O

Power Supply 9V
Relative Humidity 0% to 80%
Operating Temp. 0ºC to +40ºC
Storage Temp. -10ºC to +50ºC
Auto Power Off 20 Minutes
Input Type Differential

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Maintenance

Battery Replacement:

The 623 will display a battery symbol when the
internal 9V battery needs replacement.
Replace battery as follows:

1. Ensure instrument is switched off

2. Loosen the six cross head screws on the back
of the instrument

3. Remove the back cover

4. Remove old battery

5. Replace with new battery 9V NEDA 1604 or
equivalent

6. Reassemble the instrument in reverse order
from above being sure not to trap any wires
between the two halves of the case

7. Re-fit the six cross head screws being sure not
to over tighten

Cleaning: Use a mild detergent and a slightly damp
cloth to clean the surfaces of the instrument.

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Trouble Shooting Guide

Problem Probable Cause

Unit does not zero Zero button has not been

pushed.

Unit still does not zero If reading is greater than

0.05 and constantly
fluctuates return to local
Service Centre.

'Bat' appears on display Replace battery

immediately 9V NEDA
1505 or equivalent

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EC Declaration of Conformity

This is to certify that model 623 conforms to the pro­tection requirements of the council directive
89/336/EEC, in the approximation of laws of the
member states relating to Electromagnetic compati­bility by application of the following standards
EN50081-1 1992 Emissions Standard
EN50082-1 1992 Immunity Standard

To ensure conformity with these standards, this
instrument must be operated in accordance with the
instructions and specifications given in this manual.

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