Fluke DPM2 Plus Operator's Manual

DPM2 Plus

Digital Pressure Meter

PN 2572323
March 2006

© 2006 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.

Operators Manual

Warranty and Product Support

Fluke Biomedical warrants this instrument against defects in materials and
workmanship for one full year from the date of original purchase. During the
warranty period, we will repair or, at our option, replace at no charge a product
that proves to be defective, provided you return the product, shipping prepaid,
to Fluke Biomedical. This warranty does not apply if the product has been
damaged by accident or misuse or as the result of service or modification by
other than Fluke Biomedical. IN NO EVENT SHALL FLUKE BIOMEDICAL
BE LIABLE FOR CONSEQUENTIAL DAMAGES.

Only serialized products and their accessory items (those products and items
bearing a distinct serial number tag) are covered under this one–year warranty.
PHYSICAL DAMAGE CAUSED BY MISUSE OR PHYSICAL ABUSE IS
NOT COVERED UNDER THE WARRANTY. Items such as cables and non­serialized modules are not covered under this warranty.

Recalibration of instruments is not covered under the warranty.

This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state, province to province, or country to coun­try. This warranty is limited to repairing the instrument to Fluke Biomedical’s
specifications.

Warranty Disclaimer

Should you elect to have your instrument serviced and/or calibrated by some­one other than Fluke Biomedical, please be advised that the original warranty
covering your product becomes void when the tamper-resistant Quality Seal is
removed or broken without proper factory authorization. We strongly recom­mend, therefore, that you send your instrument to Fluke Biomedical for factory
service and calibration, especially during the original warranty period.

Notices

All Rights Reserved

 Copyright 2006, Fluke Biomedical. No part of this publication may be reproduced, transmit­ted, transcribed, stored in a retrieval system, or translated into any language without the written
permission of Fluke Biomedical.

Copyright Release

Fluke Biomedical agrees to a limited copyright release that allows you to reproduce manuals and
other printed materials for use in service training programs and other technical publications. If
you would like other reproductions or distributions, submit a written request to Fluke Biomedical.

Unpacking and Inspection

Follow standard receiving practices upon receipt of the instrument. Check the shipping carton for
damage. If damage is found, stop unpacking the instrument. Notify the carrier and ask for an
agent to be present while the instrument is unpacked. There are no special unpacking instructions,
but be careful not to damage the instrument when unpacking it. Inspect the instrument for physi­cal damage such as bent or broken parts, dents, or scratches.

Technical Support

For application support or answers to technical questions, either email

[e-mail]

or call 1-800- 648-7952 or 1-425-446-6945.

Claims

Our routine method of shipment is via common carrier, FOB origin. Upon delivery, if physical
damage is found, retain all packing materials in their original condition and contact the carrier
immediately to file a claim. If the instrument is delivered in good physical condition but does not
operate within specifications, or if there are any other problems not caused by shipping damage,
please contact Fluke Biomedical or your local sales representative.

Standard Terms and Conditions

Refunds and Credits

Please note that only serialized products and their accessory items (i.e., products and
items bearing a distinct serial number tag) are eligible for partial refund and/or credit.
Nonserialized parts and accessory items (e.g., cables, carrying cases, auxiliary modules,
etc.) are not eligible for return or refund. Only products returned within 90 days from the date
of original purchase are eligible for refund/credit. In order to receive a partial refund/credit of a
product purchase price on a serialized product, the product must not have been damaged by the
customer or by the carrier chosen by the customer to return the goods, and the product must be
returned complete (meaning with all manuals, cables, accessories, etc.) and in “as new” and re­salable condition. Products not returned within 90 days of purchase, or products which are not in
“as new” and resalable condition, are not eligible for credit return and will be returned to the cus­tomer. The Return Procedure (see below) must be followed to assure prompt refund/credit.

Restocking Charges

Products returned within 30 days of original purchase are subject to a minimum restock­ing fee of 15 %. Products returned in excess of 30 days after purchase, but prior to 90
days, are subject to a minimum restocking fee of 20 %. Additional charges for damage
and/or missing parts and accessories will be applied to all returns.

Return Procedure

All items being returned (including all warranty-claim shipments) must be sent freight-prepaid to
our factory location. When you return an instrument to Fluke Biomedical, we recommend using
United Parcel Service, Federal Express, or Air Parcel Post. We also recommend that you insure
your shipment for its actual replacement cost. Fluke Biomedical will not be responsible for lost
shipments or instruments that are received in damaged condition due to improper packaging or
handling.

Use the original carton and packaging material for shipment. If they are not available, we rec­ommend the following guide for repackaging:

 Use a double–walled carton of sufficient strength for the weight being shipped.
 Use heavy paper or cardboard to protect all instrument surfaces. Use nonabrasive

material around all projecting parts.

 Use at least four inches of tightly packed, industry-approved, shock-absorbent

material around the instrument.

Returns for partial refund/credit:

Every product returned for refund/credit must be accompanied by a Return Material Authoriza­tion (RMA) number, obtained from our Order Entry Group at 1-800-648-7952 or 1-425-446-

6945.

Repair and calibration:

To find the nearest service center, goto www.flukebiomedical.com/service

In the U.S.A.:
Cleveland Calibration Lab
Tel: [phone]
Email: [e-mail]

Everett Calibration Lab
Tel: [phone]
Email: [e-mail]

In Europe, Middle East, and Africa:
Eindhoven Calibration Lab
Tel: [phone]
Email: [e-mail]

In Asia:
Everett Calibration Lab
Tel: [phone]
Email: [e-mail]

or

Certification

This instrument was thoroughly tested and inspected. It was found to meet Fluke Biomedical’s
manufacturing specifications when it was shipped from the factory. Calibration measurements
are traceable to the National Institute of Standards and Technology (NIST). Devices for which
there are no NIST calibration standards are measured against in-house performance standards us­ing accepted test procedures.

WARNING

Unauthorized user modifications or application beyond the published specifications may result in
electrical shock hazards or improper operation. Fluke Biomedical will not be responsible for any
injuries sustained due to unauthorized equipment modifications.

Restrictions and Liabilities

Information in this document is subject to change and does not represent a commitment
by Fluke Biomedical. Changes made to the information in this document will be incorpo­rated in new editions of the publication. No responsibility is assumed by Fluke Biomedi­cal for the use or reliability of software or equipment that is not supplied by Fluke Bio­medical, or by its affiliated dealers.

Manufacturing Location

The DPM2 Plus Digital Pressure Meter is manufactured in Everett, WA, U.S.A.

Table of Contents

Title Page

Abbreviations........................................................................................iii

Introduction ..........................................................................................1

Safety Information................................................................................2

General Specifications ..........................................................................2

Service Information ..............................................................................3

Part Numbers ....................................................................................3

Meter Features ......................................................................................4

Making Measurements..........................................................................5

Zeroing..............................................................................................5

Connecting the Equipment under Test..............................................6

Pressure Measurements.....................................................................6

Measuring Gas and Gaseous Mixtures..............................................6

Measuring Liquid Mediums..............................................................6

Voltage Output Jack..........................................................................7

Battery Replacement.............................................................................8

Compatible Agents ...............................................................................8

Pressure Conversion .............................................................................10

i

List of Tables

Table Title Page

1. Switch Positions.............................................................. 5

2. Compatible Agents ......................................................... 8

3. Pressure Conversion Chart.............................................. 10

List of Figures

Figure Title Page

1. Front panel controls and indicators................................. 4

2. Setup for Measuring Liquid Medium ............................. 7

ii

Abbreviations

atm atmosphere

c centi– (10–2)

cm centimeter

cm H

0 centimeters of water

2

H

0 water

2

Hg mercury

in inch

lb pound

LCD liquid crystal display

m –meter

m milli– (10

–3

)

mm millimeter

mmHg millimeters of mercury

psi pounds per square inch

iii

V volt

DPM2 Plus Digital Pressure Meter

Introduction

W Warning

Read “Safety Information” before you use the Meter

Many healthcare devices used in hospitals incorporate positive and negative
pressures that may range from one atmosphere or greater (negative or positive)
in either liquid or gaseous form. The DPM2 Plus Digital Pressure Meter
(hereafter “the Meter”) is designed to measure these pressures to assist in
repair and quality control of medical instrumentation.

Specific applications include dialysis equipment, ophthalmic lasers, automatic
tourniquets, surgical suction, ventilators, and others.

The Meter can be used to measure and verify the positive or negative pressures
from pneumatic as well as hydraulic sources. Some of the Meter applications
are:

• Checking static cuff pressure and cuff pressure variations of pneumatic

tourniquets, noninvasive blood pressure monitors, sphygmomanometers, etc.

• Measuring positive pressures of compressor outputs in ventilators,

respirators, compressor pumps, etc.

• Checking occlusion, operating, and purge pressures in volumetric infusion

pumps.

• Verifying negative pressures in diagnostic and surgical suction equipment

such as thermotic drainage.

• Verifying vacuum levels in eye surgery equipment such as extraction and

irrigation systems.

• Checking dialysate pressure in kidney dialysis machines.

• Sending output to a strip chart recorder to keep long-term records of applied

pressure as a function of voltage.

1

DPM2 Plus

Operators Manual

Safety Information

W Caution

To avoid personal injury and possible damage to the
Meter:

• Use the Meter only with gases and liquids found in Table 2

of this manual.

• Use appropriate safety precautions when working with

hazardous liquids and gases.

• Be aware of the direction of gas flow to avoid hazardous

conditions during bleed-off procedure.

• For pressures above 5 psi and vacuum pressures of -5 psi,

use only securely clamped reinforced tubing.

General Specifications

Power Requirements............................................ One 9-volt battery, NEDA 6LR61,

IEC 1604A

Battery Life ............................................................ 60 hours of continuous use

Operating Temperature ........................................ 0 °C to 30 °C (32 °F to 86 °F)

Overpressure ........................................................ Not to exceed 110 psi

Pressure Connection ........................................... Male Luer–Lok

Ranges................................................................... -698 to +802 mmHg

-949 to +1090 cm H

-374 to +429 in H

-13.50 to +15.50 psi

-13.5 to +100.0 psi

Accuracy ............................................................... ±1 % of full scale at all ranges

Voltage Output ...................................................... 0.1 V/psi on all ranges except 100 psi,

which is 0.01 V/psi

Voltage Output Accuracy..................................... 5 % of range

Display................................................................... 0.5–in LCD with

Negative polarity indication

Dimensions ........................................................... 14.61 × 9.14 × 4.83 cm

(5.75 × 3.6 × 1.9 in)

O

2

O

2

LO BATT

2

DPM2 Plus Digital Pressure Meter
Service Information

Service Information

The Meter should be returned to the factory yearly for calibration. For return
instructions, see the section titled Returns for service/repair/calibration.

Part Numbers

Standard Fluke Part #

• Operators Manual 2572323

• Catheter Adapter 2242653

• Battery, 9-volt alkaline (NEDA 6LR61, IEC 1604A) 614487

Optional

• Calibration Manual 2577835

3

DPM2 Plus

Operators Manual

Meter Features

Liquid Crystal

(LCD)

Pressure Connector

(male Luer-Lok)

Connects to stopcoks

or pressure fittings

Potentiometer

(display zero adjust)
Use a screwdriver to
adjust if display is
not reading zero when
vented to atmosphere

Power/Selector

Switch

Turn to select range

Battery Compartment

(on bottom of case)

DPM2Plus

0

cmH

2

mmHg

OFF

VOLTAGE OUTPUT

0.01 V/psi 100 psi RANGE

0.1 V/psi ON OTHER RANGE

PRESSURE
METER

Ranges

-13.50 to +100.0 psi

-13.50 to +15.50 psi

-374 to +429 in H

-949 to +1090 cm H20

inH20

-13.5~15psi

-13.5~100psi

0

2

Figure 1. Front panel controls and indicators

4

-698 to +802 mmHg

ehg1.eps

DPM2 Plus Digital Pressure Meter
Making Measurements

Table 1. Switch Positions

Switch Position Function

Off Turn off power to the Meter

mmHg Pressure from -698 to +802 millimeters of mercury

cmH2O Pressure from -949 to +1090 centimeters of water

inH2O Pressure from -374 to +429 inches of water

-13.5~15 psi Pressure from -13.5 to +15.50 pounds per square inch

-13.5 ~ 100 psi Pressure from -13.5 to +100 pounds per square inch

Making Measurements

The Meter has a large 0.5–inch liquid crystal display (LCD) to indicate the
pressure at the Luer-Lok input. This male Luer-Lok provides the external
connection for stopcocks or pressure fittings.

Note

It may take a few seconds for the display to settle to zero when the
Meter is initially turned on and vented to atmosphere.

The Meter has five different range measurement units as indicated on the front
panel overlay in Figure 1. Two of the ranges measure psi, one of which allows
measurements of up to 100 psi. This selection option allows the operator
greater accuracy at lower psi ranges while maintaining the option to read
higher psi levels.

Zeroing

Select the desired range for the pressure measurements to be taken.

For best accuracy, make sure the pressure meter reads zero when vented to
atmosphere. Allow the Meter display to settle (due to changes in environment
it may take a few seconds for the display to read zero).

If the display will not read zero, use a small screwdriver to adjust the
potentiometer located on the side of the Meter until the display reads zero.

5

DPM2 Plus

Operators Manual

Connecting the Equipment under Test

The Meter has a male Luer-Lok fitting that serves as the pressure sensing input
port. For connecting different diameter tubing, use a stopcock or a male-to­female Luer-Lok fitting.

Note

Normally, you can use hospital grade tubing for all connections
between the pressure source and the Meter. However, rigid tubing
should be used for negative(vacuum) pressure measurements.

Pressure Measurements

Connect the source of pressure to the Luer-Lok input of the Meter. This may
require a stopcock or a male-to-female Luer-Lok connector.

Once the connection is made, the display indicates the pressure being
measured.

If the display shows a
means the limits of the selected range have been exceeded.

1 in the far left position with all other digits blank, this

Measuring Gas and Gaseous Mixtures

No special procedures are necessary when using the Meter to measure air
pressure. However, when measuring gases other than air, you must purge all
air from the tube connecting the source to the Meter. Let the gas bleed from the
end of the tubing before connecting to the Meter to remove atmosphere. This
ensures a homogenous medium for pressure measurements.

Measuring Liquid Mediums

The pressure sensor in the Meter has a thermoplastic polyester (GE-Valox)
housing. Therefore you can measure water or other liquid (solvent) pressure,
provided the pH of the liquid is between 6.5 and 7.5.

When measuring a gas pressure, errors can result if there
is liquid in contact with the pressure sensor.

6

W Caution

DPM2 Plus Digital Pressure Meter
Making Measurements

To avoid getting liquids in direct contact with the pressure
sensor, place the Meter above the liquid and allow a short
column of air between the liquid and the sensor input. See
Figure 2-2.

Should the Meter pressure chamber come into contact with
a liquid that may contain corrosive solutes (salts), the
Meter pressure chamber should be flushed with water. Use
an ordinary syringe to flush the chamber.

Up

Air

Liquid

PRESSURE

DPM2Plus

METER

cmH

0

2

mmHg

OFF

VOLTAGE OUTPUT

0.01 V/psi 100 psi RANGE

0.1 V/psi ON OTHER RANGE

inH20

-13.5~15psi

-13.5~100psi

ehg2.eps

Figure 2. Setup for Measuring Liquid Medium

Voltage Output Jack

The voltage output jack is located on the right side of the Meter case. The
Meter generates a DC voltage directly proportional to the pressure or vacuum
applied at its input port. This DC voltage is 0.1 volt/psi on all ranges except the
100 psi selection which is 0.01 volt/psi.

You can connect a data-logging device (strip chart recorder) to this voltage
output and graph profiles from a wide range of pressure or vacuum sources.
For example, you can measure peak pressures and cycling intervals generated
by rotating tourniquets.

7

DPM2 Plus

Operators Manual

Battery Replacement

When the LCD display reads LO BATT, replace the battery with an equivalent
9-volt alkaline battery located in the battery compartment on the back of the
Meter.

Compatible Agents

Table 2. Compatible Agents

Agent Temperature/Concentration

Acetic Acid Room temperature

5 %

Acetone Room temperature

100 %

Ammonia Room temperature

30 % – 35 %

Benzaldehyde Room temperature

100 %

Benzyl Alcohol Room temperature

100 %

Water 60 °C

100 %

Ethyl Alcohol Room temperature

100%

Ethylene Glycol Room temperature

100 %

Ethylene Oxide Room temperature

88 % Freon 12, 12 % Eto

Formaldehyde 60 °C

37 %

Formalin Room temperature

8

15 % methyl alcohol,
37 % formaldehyde

DPM2 Plus Digital Pressure Meter
Compatible Agents

Table 2. Compatible Agents (cont)

Agent Temperature/Concentration

Hydrochloric Acid Room temperature

10 %

Hydrogen Peroxide Room temperature

10 %, 30 %

Methanol Vapor Room temperature

100 %

Methyl Alcohol Room temperature

100 %

Oleic Acid Room temperature

100 %

Potassium
Permanganate

Sodium Hydroxide Room temperature

Sodium Hypochlorite Room temperature

Steam 300 °F, dry heat

Room temperature
25 %

10 %

10 %

9

DPM2 Plus

Operators Manual

Pressure Conversion

Table 3. Pressure Conversion Chart

from

PSI

lb/in2

in Hg

@0 °C

in H20

@20 °C

mmHg

@0 °C

PSI

lb/in2

1

2.0359

27.73

51.714 25.401

in Hg

@0 °C

0.49118 3.6062

1

13.620

in H20

@20 °C

–2

×10

7.3419

–2

×10

1

1.8649

mmHg

@0 °C

1.9337

–2

×10

3.9368

–2

×10

0.53622

1

mm H20

@4 °C

1.4223

–3

×10

2.8959

–3

×10

3.9440

–2

×10

7.3558

–2

×10

ATM

14.696

29.920

407.52 0.53622

760.00

TORR

1.9337

–2

×10

3.9368

–2

×10

1

mm H20

@4 °C

ATM

TORR

703.05 345.32

6.8045

–2

×10

51.714 25.401

3.3422

×10–2

25.353

2.4538

×10–3

1.8649

13.595

1.3158

×10–3

1

1

9.6788

×10–5

7.3558

–2

×10

1.0332

4

×10

1

760.00

13.595

1.3158

×10–3

1

10