Universal Enterprise EM201 Installation Manual

EM151/EM201

PSI

EM201

- +

Electronic
Manometer

INSTRUCTION MANUAL

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®

TABLE OF CONTENTS

Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

EM151/EM201 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Pressure Conversion Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

INTRODUCTION

The EM151 and EM201 provide a simple, time­saving alternative to U-tube pressure measurements.
Use the UEi EM151 & EM201 to measure gas supply
and draft pressures in residential or light commercial
properties. The EM201 differential mode provides a
convenient method to measure pressure drops.

SAFETY RULES

WARNING!

Before every use, check to be sure the meter and its
tubing are free from breaks or blockage. While using
the meter, if you suspect gas is leaking, or if you can
smell gas, close off the gas supply and ventilate the
occupied space. Identify and repair the source of the
leak before continuing with the test.

In the interest of safety, this instrument should only
be used by trained, competent professionals who
know the hazards and consider the risks of working
on and with industrial equipment.

These meters do not measure water pressures;
under these conditions they will fail. Do not exceed
10 PSI input pressure

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FEATURES

EM151

• Single input to measure positive and negative pressure to
±20" wg

• Ruggedized, including rubber boot with integral magnet

• Simple two-button operation

• Measures in inches water gauge

• Auto power-off after 20 minutes

• 1 year limited warranty

EM201

• Dual input differential measurement to ±40" wg or

±100 mBar

• Ruggedized, including rubber boot with integral magnet

• Measures in inches water gauge and mBar

• Auto power-off after 20 minutes

• Min/Max value capture

• Data Hold

• Back-lit display

• 1 year limited warranty

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OPERATING INSTRUCTIONS

1. Zero the meter

Prior to use, the meter must be zeroed. To do this, ensure the
meter is in a non-pressurized area, and press and hold the
‘ZERO’ button for approximately four seconds. The display will
show ‘888’ to indicate that the zero function has occurred.

2. Measure Pressure

Connect the flexible tube between the meter and the
pressure source.

The EM201’s positive input is to the right when looking at the
front of the instrument. Applying a positive pressure to this port
will display a positive reading. The input to the left is the
negative port. (Applying a positive pressure here will display a
positive reading). Use either input to measure a single source
by venting the unused input to atmosphere. The instrument will
continually provide a differential reading of the two inputs.

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3. SCALE

To select mBar press the "SCALE" button on the EM201. Press
"Scale" again to return to inches of water gauge. To select scale
on the EM151briefly press the green button.

4. MIN/MAX (EM201 Only)

The EM201 will capture values for both the minimum and
maximum values read. To reset zero the instrument or simply
power the meter off, then back on. Captured values can be
displayed in either inches water gauge or mBar.

5. HOLD (EM201 only)

The EM201 has a display hold feature. Press this during
reading to freeze the display. Press again to return to
actual measurement.

6. BACKLIGHT (EM201 only)

The EM201 has a backlit display. Press to turn on or off the
back light feature.

7. Over-range

If the input exceeds the meter range "OL" will be displayed.
Immediately disconnect from the pressure supply safely to
reduce chances of damage to the instrument.

5

SPECIFICATIONS

EM151

Measurement range: -20" to +20" WG
Minimum pressure displayed: 0.01” WG
Accuracy: ±0.02” < 2”

±1%rdg > 2”

Resolution: 0.01" -9.99" to +9.99" WG

0.1" < -10", > +10" wg

Operating range: 0 - 40˚C, 10 - 90% RH

non condensing

Battery life: 50 hours min with

alkaline battery

EM201

Measurement range: -40 to +40" WG
Minimum pressure displayed: 0.01” WG
Accuracy: ±0.02” < 2”WG

±1%rdg > 2”WG

Resolution: 0.001" -9.999" to +9.999"WG

0.01" < -10", > +10" wg

Operating range: 0 - 40˚C, 10 - 90% RH

non condensing

Battery life: 40 hours min with

alkaline battery

6

PRESSURE CONVERSIONS

Multiply By To Get

In. of H2O 1.868 mmHG
In. of H2O 0.074 in HG
In. of H2O 0.249 kPa
In. of H2O 249.1 Pascals
In. of H2O 2.491 mBar
In. of H2O 0.036 PSI
In. of H2O 25.40 mmH2O

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WARRANTY

The EM151 or EM201 are warranted to be free from defects in materials and workmanship for
a period of three years from the date of purchase. If within the warranty period your instrument
should become inoperative from such defects, the unit will be repaired or replaced at UEi’s
option. This warranty covers normal use and does not cover damage which occurs in shipment
or failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. Batteries and consequential damage resulting from failed batteries are not
covered by warranty.

Any implied warranties, including but not limited to implied warranties of merchantability
and fitness for a particular purpose, are limited to the express warranty. UEi shall not be
liable for loss of use of the instrument or other incidental or consequential damages,
expenses, or economic loss, or for any claim or claims for such damage, expenses or
economic loss.

A purchase receipt or other proof of original purchase date will be required before warranty
repairs will be rendered. Instruments out of warranty will be repaired (when repairable) for a
service charge. Return the unit postage paid and insured to:

UEi Service Department

8030 SW Nimbus, Beaverton, OR 97008

[phone] • FAX: [phone] • Email: [e-mail]
This warranty gives you specific legal rights. You may also have other rights which vary
from state to state.

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Copyright © 2009 Universal Enterprises, Inc. Printed in Taiwan EM151/201-MAN 1/09