halstrup-walcher EMA 200 Instruction Manual

Instruction Manual

EMA 200 Digital Pressure Gauge

halstrup-walcher GmbH
Stegener Straße 10

D-79199 Kirchzarten, Germany
Phone: [phone]

Fax: [phone]
E-Mail: [e-mail]

Internet: www.halstrup-walcher.com

Document 7100.004074 Version 3.2 07/2012

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Table of Contents

1 Purpose of instruction manual ................................................................................................ 3

2 Conformity .............................................................................................................................. 3

3 Safety precautions ................................................................................................................. 4

3.1 Appropriate use ...................................................................................................................... 4

3.2 Troubleshooting, maintenance, repairs, disposal ................................................................... 4

3.3 Symbols ................................................................................................................................. 5

4 Instrument description ............................................................................................................ 6

4.1 Functions ................................................................................................................................ 6

4.2 Instrument controls ................................................................................................................. 6

5 Start-up .................................................................................................................................. 7

5.1 Electrical connections ............................................................................................................ 7

5.2 Pneumatic connections .......................................................................................................... 7

6 Operating the instrument ........................................................................................................ 7

6.1 Switching the instrument on/off .............................................................................................. 7

6.2 Display modes: measurement, hold, max., min. .................................................................... 7

6.3 Changing pressure units ........................................................................................................ 8

6.4 Zeroing key ............................................................................................................................ 8

6.5 Analogue output ..................................................................................................................... 9

7 Configuration .......................................................................................................................... 9

7.1 Setting units of pressure ........................................................................................................ 9

7.2 Temperature display ............................................................................................................ 10

7.3 Flow-rate display(not available with 200kPa Range) ........................................................... 10

7.4 Media density(not available with 200kPa Range) ................................................................ 10

7.5 Pitot factor(not available with 200kPa Range) ..................................................................... 11

7.6 Setting the scale for the analogue output ............................................................................. 11

7.7 Analog offset for +/- measurement ....................................................................................... 11

7.8 Attenuation ........................................................................................................................... 11

7.9 Auto On/Off .......................................................................................................................... 12

7.10 Default settings .................................................................................................................... 13

8 Troubleshooting ................................................................................................................... 14

9 Technical data ...................................................................................................................... 15

10 Drawings .............................................................................................................................. 17

EMA 200 Instruction Manual

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1 Purpose of instruction manual

This instruction manual describes the features of the EMA 200 digital pressure gauge
and provides guidelines for its use.

Improper use of this instrument or failure to follow these instructions may cause injury
or equipment damage. All individuals responsible for operating this instrument must
therefore be properly trained and aware of the hazards, and must carefully follow
these operating instructions and the safety precautions detailed within. Contact the
manufacturer if you do not understand any part of this instruction manual.

Handle this manual with care:

 It must be readily available throughout the lifecycle of the instrument.
 It must be provided to any individuals who assume responsibility for operating the

instrument at a later date.

 It must include any supplementary materials provided by the manufacturer.
The manufacturer reserves the right to continue developing this instrument model

without documenting such development in each individual case. The manufacturer
will be happy to determine whether this manual is up-to-date.

2 Conformity

This instrument corresponds to the state of the art and meets all legal requirements
set forth in EC directives as evidenced by the CE label.

© 2006

The manufacturer owns the copyright to this instruction manual. This manual contains
data, instructions and drawings pertaining to the features and usage of this
instrument; copying this manual in part or in full or distributing it to third parties is
prohibited.

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3 Safety precautions

3.1 Appropriate use

The EMA 200 is a portable, battery-powered digital pressure gauge for measuring
positive and negative differential pressures. At the heart of this precision instrument is
a pressure measurement capsule containing a membrane spring; the deflection of
this spring is then ascertained via an inductive measurement principle. Because it is
durable and easy-to-use, the EMA 200 lends itself well to maintenance work and
customer servicing for heating, air-conditioning and ventilation units, where it can be
used for monitoring filters, measuring fireplace drafts and wind pressure, etc.Its
precision and reproducibility also make the EMA 200 is highly suitable for use in
laboratory applications.

Always observe the operating requirements—particularly the permissible supply
voltage—indicated on the rating plate and in the “Technical data” section of this
manual.

The instrument may only be handled as indicated in this manual. Modifications to the
instrument are prohibited. The manufacturer is not liable for damages caused by
improper use or failure to follow these instructions. Violations of this type render all
warranty claims null and void.

3.2 Troubleshooting, maintenance, repairs, disposal

The individual responsible for the electrical connections must be notified immediately
if the instrument is damaged or if errors occur.

This individual must take the instrument out of service until the error has been
corrected and ensure that it cannot be used unintentionally.

This instrument requires no maintenance.
Only the manufacturer may perform repairs that require the housing to be opened.
The electronic components of the instrument contain materials that can be reused.

For this reason the instrument must be recycled in accordance with the environmental
guidelines of the jurisdiction in question once it has been taken permanently out of
service.

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3.3 Symbols

The symbols given below are used throughout this manual to indicate instances when
improper operation could result in the following hazards:

WARNING! This warns you of a potential hazard that could lead to bodily injury up
to and including death if the corresponding instructions are not followed.

WARNING: This warns you of a potential hazard that could lead to significant
property damage if corresponding instructions are not followed.

INFORMATION: This indicates that the corresponding information is important

for operating the instrument properly.

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4 Instrument description

4.1 Functions

The EMA 200 is a battery-operated, digital pressure gauge for measuring
overpressure, vacuum and differential pressure of non-aggressive gases. Operating
range is 200 Pa to 200 kPa.

Because it is robust, easy-to-use and includes an analogue output, this instrument is
especially suitable for maintenance, customer service and record-keeping for heating,
ventilation and air-conditioning units.

At its heart is a pressure measurement capsule with a beryllium bronze membrane
spring, which is displaced by the pressure difference between the two chambers of
the measurement capsule. Measurement range is between 200 Pa and 20 kPa. A
distance measurement system converts this displacement into an electrical signal.
A semiconductor sensor is used for measuring pressures in the area of 200 kPa.

4.2 Instrument controls

The instrument control panel consists of a keypad with four buttons.

pressure display

flow-rate / temperature display

on/off

select key: pressure, min.,

max., hold

select key: pressure units

zero-point calibration /
configuration