Fluke RUSKA 2417, RUSKA 2416, RUSKA 2413 User Manual

RUSKA 2413, 2417 &

2416

Differential Pressure Null Indicator

Users Manual

PN 3966494
November 2010
© 2010 Fluke Corporation. All rights reserved. Printed in USA. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance
with its functional specifications for 90 days and that it has been properly recorded on non-defective media.
Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is
available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the
applicable international price. Fluke reserves the right to invoice Buyer for importation costs of
repair/replacement parts when product purchased in one country is submitted for repair in another country.

Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

11/99

To register your product online, visit register.fluke.com

Table of Contents

Chapter Title Page

1 Description and Specifications.......................................................... 1-1

Introduction........................................................................................................ 1-1

How to Contact Fluke ........................................................................................ 1-1

Safety Information ............................................................................................. 1-1

Symbols Used in this Manual ............................................................................ 1-1

General Description ........................................................................................... 1-2

Specifications..................................................................................................... 1-2

2 Applications......................................................................................... 2-1

Introduction........................................................................................................ 2-1

Gas-to-Gas..................................................................................................... 2-1

Liquid-to-Gas ................................................................................................ 2-1

Liquid-to-Liquid............................................................................................ 2-1

3 Preparation for Use ............................................................................. 3-1

Preparation for Use ............................................................................................ 3-1

Bleeding Lower Chamber in a Liquid-To-Liquid System................................. 3-2

4 Operation ............................................................................................. 4-1

Operating Instructions........................................................................................ 4-1

5 Performance Observations ................................................................ 5-1

Actual Sensitivity versus Apparent Sensitivity.................................................. 5-1

Calibration ......................................................................................................... 5-1

Detecting Leaks ................................................................................................. 5-2

6 Maintenance......................................................................................... 6-1

Servicing the Instrument.................................................................................... 6-1

Diaphragm ......................................................................................................... 6-1

RUSKA 2413 Differential Pressure Null Indicator —Replacement of

Differential Transformer.................................................................................... 6-2

Failure Diagnoses .......................................................................................... 6-2

i

RUSKA 2413, 2417 & 2416

Users Manual

RUSKA 2413 — Replacement of Transformer................................................. 6-2

7 Parts List .............................................................................................. 7-1

RUSKA 2413 Differential Pressure Null Indicator — Parts List ...................... 7-1

RUSKA 2417 Differential Pressure Transducer — Parts List........................... 7-5

RUSKA 2417-706 Differential Pressure Cell 40,000 PSI — Parts List ............ 7-5

8 General Information ............................................................................ 8-1

Introduction........................................................................................................ 8-1

9 Functional Circuit Description ........................................................... 9-1

Introduction........................................................................................................ 9-1

0Test Procedure .................................................................................... 1

Introduction........................................................................................................ 1

Setup Procedure ................................................................................................. 1

RUSKA 2417 Transducer — Replacement of Differential Transformer ...... 6-3

Failure Diagnoses .......................................................................................... 6-4

Appendices

A Explanation of Test Report.......................................................................... A-1

ii

List of Tables

Table Title Page

1-1. Symbols.................................................................................................................. 1-2

6-1. Failure Diagnosis ................................................................................................... 6-2

6-2. Resistance Measurements for the Windings .......................................................... 6-4

7-1. RUSKA 2413 Differential Pressure Cell - Parts List ............................................. 7-4

7-2. RUSKA 2417 Differential Pressure Cell - Parts List ............................................. 7-5

iii

RUSKA 2413, 2417 & 2416

Users Manual

iv

List of Figures

Figure Title Page

7-1. RUSKA 2413-711 Differential Pressure Null Indicator - Side View .................... 7-2

7-2. RUSKA 2413-711 Differential Pressure Null Indicator - Top View ..................... 7-3

v

RUSKA 2413, 2417 & 2416

Users Manual

vi

Description and Specifications

Introduction

This manual covers the operation and maintenance of the RUSKA 2413, RUSKA 2416
and RUSKA 2417.

How to Contact Fluke

To order accessories, receive operating assistance, or get the location of the nearest Fluke
distributor or Service Center, call:

• Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)

• Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: [phone]

• China: [phone]

• Japan: [phone]

• Singapore: [phone]

• Anywhere in the world: [phone]

Chapter 1

Or, visit Fluke's website at www.fluke.com

To register your product, visit http://register.fluke.com

To view, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals

.

.

.

Safety Information

W Warning

The control box/null indicator must be set for the proper line
voltage prior to connection to a power source.

Symbols Used in this Manual

In this manual, a Warning identifies conditions and actions that pose a hazard to the
user. A Caution identifies conditions and actions that may damage the Differential
Pressure Null Indicator.

Symbols used on the Differential Pressure Null Indicator and in this manual are explained in
Table 1-1.

1-1

RUSKA 2413, 2417 & 2416

Users Manual

General Description

The Differential Pressure Null Detector, composed of a Differential Pressure Transducer
(RUSKA 2413 or RUSKA 2417) and Electronic Null Indicator (RUSKA 2416), is
designed to sense small pressure differences in both low and high pressure systems.

The transducer consists of two pressure chambers, separated by a thin diaphragm. A
difference in pressure in the two chambers causes a deflection of the diaphragm and a
resultant signal to the electronic circuit. The signal is obtained as the output of a
differential transformer whose movable core is attached to the diaphragm. The signal is
not a linear function of the difference in pressure; therefore, use of the instrument for
accurate evaluation of pressure differences is limited to small deflections of the
diaphragm. The principle use of the instrument is intended as a null sensor/indicator with
which the pressure of one medium may be precisely adjusted to that of another. Some of
the advantages of the instrument are its high sensitivity, high working pressure
(15,000 psi for RUSKA 2413 Series cells and 40,000 psi for RUSKA 2417 Series), and
its ability to withstand the full working pressure across the diaphragm without injury
(15,000 psi maximum over-range pressure both series).

Table 1-1. Symbols

Symbol Description

B AC (Alternating Current)

J Earth Ground

W Important Information: refer to manual

Do not dispose of this product as unsorted

~

municipal waste. Go to Fluke’s website for
recycling information.

Specifications

Inaccuracy Inaccuracy is defined as the error in the null indication. It is

expressed as the ratio of ΔP actually existing when the meter
indicates a null, to the total cell pressure, in parts per million,
or as constant ΔP — whichever is greater.

PPM ΔP PSI

Error with calibration

corrections

Error without calibration

corrections

Sensitivity The sensitivity is continuously variable from 2* 10-4 psi ΔP

per meter division to 0.01 psi ΔP per meter division. The
maximum value may exceed 2 *10-4 psi/div. because of
variations in diaphragm characteristics and circuit parameters.

Operating Pressure 15,000 psi liquid or gas for RUSKA 2413 Series cells; 40,000

psi for RUSKA 2417 Series cells (See pressure media for
limitations).

Static Test Pressure 22,000 psi for five minutes with nitrogen. The ungasketed

5 0.01

20 0.1

1-2

Description and Specifications

Specifications 1

metal seals act as relief valves when pressures exceed 22,000
psi. The bolts yield to the increased lead and permit the
excess pressure to escape. All attempts at destructive testing
of these units have failed. 50,000 psi for RUSKA 2417 Series
cells.

Over-Range Pressure 15,000 psi ΔP either side of diaphragm for both RUSKA

2413 and RUSKA 2417.

Construction Material Basic material of the transducer is one of the 400 Series

Stainless Steels.

Pressure Media Lower Chamber of pressure cell — Dry air, nitrogen,

mercury, or any fluid inert to 400- or 300-Series Stainless
Steels.

Upper Chamber — Dry air, nitrogen, or any fluid inert to

400- or 300-Series Steels, low-carbon iron, brass, copper,
PVC, cadmium-plated steel or soft solder. Electrolytes may
not be used in the upper chamber.

It is not recommended to use fluids in either cavity

containing free hydrogen. The use of such fluids is
hazardous because of possible hydrogen embrittlement of
the cell body. (Consult the manufacturer for cells of special
materials.)

Temperature Range 40º F to 160º F

Construction Details and Parameters:*

Note

Replacing diaphragm or transformer voids calibration.

Change in Null with Working

See Specifications

Pressure

The stress from the applied pressure produces a

displacement of the core within the transformer even though
the pressure across the diaphragm may be zero. The
displacement results in a shift of the apparent null with the
true null and is approximately a linear function of the
pressure. A calibration curve is supplied with each
instrument to indicate the magnitude of the null shift.

Change in Null

<0.05 psi

with Over-Range Pressure

The null change with over-range pressure arises from

dimensional variations within the cell body. The value
shown represents the maximum expected change when the
cell is over-ranges from alternate sides of the diaphragm. In
practice, a procedure is used that permits intentional over­ranging, from only one side. After several such applications
of over-range pressure from the same side, null indication
becomes stable. If the cell is accidentally over-ranged from
the *opposite side, there is no harm except for a temporary
loss of the original null setting. The cell must be over-ranged
from the original side to reestablish the true null.

1-3

RUSKA 2413, 2417 & 2416

Users Manual

Approximate Range of ΔP: +/-2 psi

Volumes of Cavities: Upper — 29.5 cc

Lower — 0.6 cc

Effective Diameter

1.9 inches

of Diaphragm:

Thickness of Diaphragm: 0.001 inch

Types of Fittings: For RUSKA 2413 Series, RUSKA 60 degree cone with

3/8 24 straight thread male cone on fitting, female cone in
body of cell. Adapters are provided to go to DH500
(equivalent to AE F250C, HIP HF4). For RUSKA 2417
Series, DH500 (equivalent to AE F250C, HIP HF4).

*Values shown under this heading are nominal at time of this publication and are not to be

considered as binding specifications. They are subject to change with improvements in design
and technology.

1-4