Ametek DM330 Series User manual

Leader in
Level Measurement
Technical Assistance: 1-800-527-6297
Outside North America: [phone]
Installation and
Operating Instructions
DM330 Series
Magnetostrictive Level System
U.S. and Canada: 1-800-553-9092
24-Hour Service: 1-800-527-6297
International: [phone]
Fax: [phone]
E-mail: drexelbrook.ser[email protected]
Website: www.drexelbrook.com

AMETEKDrexelbrookmakesnowarrantyofanykindwithregardtothematerial contained
in this manual, including, but not limited to, implied warranties or fitness for a particular
purpose. Drexelbrook shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the performance or use of material.
Copyright 2007 AMETEK Drexelbrook

DM330 Series
Magnetostrictive Level System
EDO #01-07-123
DM33X-LM
IssuE #8
205 Keith Valley Road, Horsham, PA 19044
U.S. and Canada: 1-800-553-9092
24-Hour Service: 1-800-527-6297
International: [phone]
Fax: [phone]
E-mail: drexelbrook.inf[email protected]
Website: www.drexelbrook.com
An ISO 9001 Certified Company

Contents
Section 1: Introduction................................................................................................1
1.1 Product Description......................................................................................1
1.2 Terminology..................................................................................................1
1.3 Technology...................................................................................................2
1.4 Model Numbering - Explosion-Proof............................................................3
1.5 Model Numbering - Intrinsically Safe...........................................................4
1.6 Probe Dimensions - Inches (mm) ................................................................5
1.7 Sanitary Probe Dimensions - Inches (mm)..................................................5
1.8 Float Dimensions & Types - Inches (mm) ....................................................5
Section 2: Installation..................................................................................................7
2.1 Unpacking....................................................................................................7
2.2 Mounting Conditions...................................................................................9
2.3 Mounting Considerations.............................................................................11
2.4 Stainless Steel Probe Mounting...................................................................11
2.5 Flexible Polyvinylidene Fluoride (PVDF) Probe Mounting............................14
2.6 Mounting Optional Housing .........................................................................19
2.7 Wiring...........................................................................................................20
2.8 Loop Configuration of 4mA & 20mA Control Points.....................................23
2.9 Correlating Level..........................................................................................25
Section 3: Operation....................................................................................................27
Section 4: Troubleshooting.........................................................................................29
4.1 Symptom Chart............................................................................................29
4.2 Internal Diagnostics.....................................................................................29
4.3 Automatic Gain Control (AGC).....................................................................30
4.4 Factory Assistance.......................................................................................31
4.5 Field Service................................................................................................31
4.6 Customer Training........................................................................................31
4.7 Equipment Return........................................................................................32
Section 5: Specifications.............................................................................................33
Section 6: Approvals....................................................................................................35
Section 7: Control Drawings.......................................................................................37

Section 1

Introduction
1
Section 1: Introduction
1.1 Product Description
The AMETEK Drexelbrook DM330 Series Magnetostrictive
Level System is an integral assembly that measures linear
motion or liquid level using magnetostrictive technology. A
single level output is provided with congurable 4 and 20mA
points in an intrinsically safe, standard two wired loop-powered
conguration.
Unlike conventional level instruments the electronics are
incorporated into the measuring probe and there is no external
electronic housing. This design utilizes sophisticated Surface
Mount Technology (SMT) integrated into a 5/8” diameter tube,
reducing user's cost and offers greater options for insertion
and mounting. The self-contained unit provides IP68 or Nema
4X protection in either rigid 316 stainless steel or exible
Polyvinylidene Fluoride (PVDF).
There are several reasons for using a exible PVDF probe
instead of a rigid stainless steel probe:
Limited Headroom: There may be limited space available above
a tank, making it impossible to install a rigid probe without
damaging the probe.
Chemical Compatibility: When an application is not compatible
with 316 SS, then PVDF may be a good alternative.
Large Tanks: Since the 316 SS probe maximum length is 24
feet, PVDF can be substituted for larger tanks. PVDF probes
are available in lengths up to 40 feet. Consult factory for longer
lengths
Other standard options include a quick disconnect mini-
connector or ¾” NPT conduit connection. An optional housing
is available which includes terminal connectors and adjustors
for zero & span.
A variety of oats and mounting accessories are available to
t nearly all applications. The sanitary stainless steel version
features all welded and polished construction with 180 grit for
food service or 240 grit, ground, and Polished nish for more
stringent sanitary applications.
1.2 Terminology
Magnetostriction: A magnetic eld produces small change in
the physical dimension of ferromagnetic materials on the order
of several parts per million in carbon steel and conversely, a
physical deformation or stain (torsion) produces a change of
magnetization in the material.

DM330 Series - Magnetostrictive Level System User's Manual
2
1.3 Technology
In a magnetostrictive level sensor a current pulse is sent down a
wave guide made of a special nickel alloy wire designed to enhance
magnetostrictive properties. A permanent magnet within a oat
is used to indicate the position or level being measured. The
interaction of the current pulse with the magnetic eld created by a
oat (with magnet) produces a torsional strain pulse that travels at
approximately the speed of sound along the wire. A small induction
pickup coil senses the strain pulse. The position of the oat is
determined with high precision by measuring the time between the
launching of the current pulse and the arrival of the torsional strain
pulse.
The magnetostrictive wire is linearized during manufacture and
the speed of the torsional pulse is determined for the specic sensor.
Inherently, magnetostrictive sensors have very high resolution and
repeatability.
Magnetostrictive technology is excellent as well for applications where
the dielectric constant is very low or is changing. The technology has
been used quite successfully for the detection of leaks in underground
storage tanks, for example. The measurement of a 0.1 gallon leak
out of a 10,000 gallon tank over a period of one hour is the standard
for EPA mandated leak detection.
A Current Interrogation Pulse creates an
electromagnetic field along the Magnetostrictive wire.
Strikes field of permanent magnet & creates a torsional strain pulse
or wave guide twist.
...causing two torsional strain pulses to travel in each direction along
wire (the wave guide) at approximately the speed of sound.
Time between initial pulset
1
and secondt
2
reflected return pulse
is used to determine float position & level.
t 1
t 2
t 2
Magnetostrictive wire within tube...
Reflector
Permanent Magnet in Float
t 1 -t 2
t1t2
Permanent Magnet in Float Reflector
Magnetostrictive wire within tube...
pulse
reaction pulses
Figure 1-1
Magnetostrictive Theory

Introduction
3
1.4 Model Numbering - Explosion-Proof
Special Mounting (does not affect agency certification)
Magnetostrictive Level Measurement system
DM330
Probe Style / Material
X 316SS
Connector Style
D Dual 3/4" NPT - for both housing and vessel mounting
S Single 3/4" NPT - for housing mounting, vessel mtg. via compression fitting, flange or triclamp
Thread Mounting
E English Units - 3/4" NPT with Connector Style D or S
Overall Length
XXX (in inches only)
Output Signal
F1 1 Signal Output
Float 1 Type
XXX -- See Float in Chart below
Housing option
H Condulet with Zero & Span push-buttons
Special Mounting
Y
Explosion proof Class I Div. 1, (FM & CSA)
Z Flame proof for Zone 1 (ATEX pending)
XX None
CF Adjustable Compression Fitting
(5/8” tube fitting to 3/4” NPT)
Float Kits
Float Type selection includes Float, spacer and retaining clip
Material Shape Diameter Hight S.G. Max. Press.
PU0 Ureth. Cylind 3.85" 2.75" 0.52 50psi
PN0 Nitrophyl Round 2.02" 1.38" 0.4 300psi
PK0 PVDF Oval 2.05" 2.40" 0.7 100psi
PE0 316SS Oval 2.05" 2.7" 0.54 350psi
XXX None
YYY - Special Float / Float Kit ordered as a separate line item
See section 6 for Explosion-Proof Approval Information

DM330 Series - Magnetostrictive Level System User's Manual
4
1.5 Model Numbering - Intrinsically Safe
Magnetostrictive Level Measurement system
DM330
Probe Style / Material
X 316SS
V PVDF (Polyvinylidene Fluoride)
S 316SS 3A Sanitary 240 grit electropolished
F 316SS Food Grade 180 grit
Connector Style
M Mini connector
D Dual 3/4" NPT - for both housing and vessel mounting
S Single 3/4" NPT - for housing mounting, vessel mtg. via compression fitting, flange or triclamp
R Right Angle Connection - (1/2" NPT Electrical Connection)
Thread Mounting
E English Units - 3/4" NPT with Connector Style D or S
Overall Length
XXX (in inches only, not to exceed 480 inches)
Output Signal
F1 1 Signal Output
Float 1 Type
XXX -- see Float/Weight Kits in Chart below
Housing option
H Condulet with Zero & Span push-buttons
X None
Special Mounting
C C version [limited temp. range]
T TriClamp with E-clip retainer
P Triclamp with CIP perm. end plug
[float non-removable]
W Welded Flange Fitting
X None
Mounting Size
20 2" Tri-clamp
25 2 1/2" Tri-clamp
30 3" Tri-clamp
40 4" Tri-clamp
CF Adjustable Compression Fitting
XX None
X* =Weight Kit
Material Shape Diameter Hight
0 None No weight kit on Stainless Steel probes (X, S, F, or H)
1 316SS Round 2" 5" For PVDF Probe up to 144" long
2 316SS Round 2" 7" For PVDF Probe from 145" to 288" long
3 316SS Round 2" 11" For PVDF probe from 289" to 432" long
4 316SS Round 2" 13" For PVDF probe from 433" to 600" long
Float Kits and Float /Weight Kits Float Type selection includes Float, spacer and retaining clip
Material Shape Diameter Hight S.G. Max. Press.
PS0 316SS Oval 1.83" 2.94" 0.61 350psi (3A Approved)
PUX* Ureth. Cylind 3.85" 2.75" 0.52 50psi
PNX* Nitrophyl Round 2.02" 1.38" 0.4 300psi
PKX* PVDF Oval 2.05" 2.40" 0.7 100psi
PEX* 316SS Oval 2.05" 2.7" 0.54 350psi
XXX None
YYY - Special Float / Float Kit ordered as a separate line item
See section 6 for Intrinsically Safe Approval Information