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

Introduction
5
1.6 Probe Dimensions - Inches (mm)
1.7 Sanitary Probe Dimensions - Inches (mm)
1.8 Float Dimensions &Types - Inches (mm)
V STYLE CONNECTOR [PVDF VERSION]
DEAD
BAND
ACTIVE RANGE
12.00
(304.8)
NULL ZONE
3/4 NPT
OVERALL LENGTH (O.A.L.)
2.06
(52.32)
3/4 NPT
7/8-16 UNS-2A 1.00
(25.4)
OVERALL LENGTH (O.A.L.)
ACTIVE RANGE DEAD
BAND
M STYLE CONNECTOR
0.625
(15.88)
0.625
(15.88)
2.00
(50.8)
8.00
(203.2)
NULL ZONE
See Specifications for PVDF
[ INCHES (MM) ]
1.83
(46)
0.625
(16)
1.00
(25)
SPAN
OVERALL LENGTH
DEAD BAND
8.00
(203)
NULL ZONE
1.75
(44) 2.00
(51)
(POLISHED AREA)
FLOAT
TRI-CLAMP FITTING
2.00
(51)
7/8-16 UNS 2A
3.20
(81)
2.94
(75)
FIXED END
All dimensions in inches (mm).
2.05 (52) Maximum
Diameter
.70 (18)
I.D.
1.35 (34)
2.69 (68)
Denotes magnet location within float
Float
Spacer keeps float in
active area of probe
Retaining Ring
Style X - 316SS Probe
Float
Style V - PVDF Probe
Retaining Pin
nests in recess
of weight, holding
it onto probe
Weight "hangs" on
bottom of probe

Section 2

Installation
7
Section 2: Installation
IMPORTANT
Be sure to read & understand all of the Installation
Instructions before beginning the procedure!
2.1 Unpacking
Carefully remove the contents of the shipping carton and check
each item against the packing list before destroying any packing
materials. If there is any shortage or damage, report to the
factory at 1-215-674-1234.
2.1.1 Storage
DM330 systems should be stored in their original shipping
containers until ready for installation.
Special Caution:
DM330V – Flexible PVDF systems are shipped in a wooden crate
approx. 4' x 4' (approx. 1m x 1m). The shipping crate protects
the PVDF tubing from bending or damage. After inspection, this
crate should be stored lying at until ready for installation.
Do not remove the supporting tie wrap fasteners until ready for
installation at the vessel top. Tie wraps should only be removed
in the order indicated on the tie wrap tags.

DM330 Series - Magnetostrictive Level System User's Manual
8
DO NOT remove from crate and store as shown below, the
PDVF tubing may bend and become damaged under is own
weight.
Damage that occurs in storage is not covered under
manufacturers system warranty.
2.1.1 Storage (Continued)
Please see section 2.5.3 for additional handling instructions.
SYSTEM DAMAGE DUE TO BENDING!!
Note: Numberedsupportingtiewrapfasteners
have also been removed.

Installation
9
2.2 Mounting Conditions
CAUTION
• When installing probes, do not bend rigid probes,
permanent damage may result.
Flexible PVDF probes are intended for coiling into
a 40" (1m) loop. Bending beyond that diameter or
repeated bending can cause permanent damage. Do
NOT unwind until actually feeding into vessel!
Longer rigid probes need to be supported at both ends
while handling.
Probes are sealed at the factory and have electronic
circuits inside. Do not attempt to open probe or weld
the tube.
•DM330 Series level system is designed for industrial
applications, but should be mounted in a location as free
as possible from vibration, corrosive atmospheres, or any
possibility of mechanical damage.
•Place the level gauge in a reasonably accessible location.
Ambient temperature should be between -20°F and 158°F
(-4°C to 70°C).
• Mount the probe perpendicular with gravity. See Figure
2-1.
•Float should have free movement along probe. Float
dimensions are shown in Section 1.5.
• Float Retention Clip should be in place at base of probe.

DM330 Series - Magnetostrictive Level System User's Manual
10
2.2 Mounting Conditions (Continued)
A
Range
Probe
3/4" NPT Adjustable
Compression Fitting
Reducing
Bushing
Optional
Flange
5/8 " Tube
Float
Product Level
Magnet Position
Marked on Float
(Weld Seam)
E-Clip Retaining
Ring & Spacer
on 316SS version;
may rest on bottom of vessel
Bottom of Vessel
On PVDF version: Allow for vessel
expansion or contraction prior to
tightening tube coupling
Clearance Variable See Chart
B
7/8" - 16 UNS-2A
Mini-connector
on 316SS version
3/4" NPT
3/4" NPT
5/8 Flexible
PVDF Tubing
ProbeType A B Span Range
316SS 8 in. 2 in. 6 to 278 in.
(203) (51) (152 to 7061)
With Compression Fitting Span Range 6 to 272 in.
(152 to 6908)
PVDF 12 in. Variable 48 to 480in.
(305) See Chart (1220 to 12192)
inches
(mm)
Required
PVDF Bottom Clearance
Probe Length Clearance "B"
to 144 in. (3658) 1 in.(25) 6 in. (152)
to 288 in. (7315) 2 in.(50) 8 in. (203)
to 432 in. (10973) 3 in. (76) 12 in. (305)
to 480 in. (12192) 4 in. (102) 14 in. (356)
inches
(mm)
Figure 2-1
Installation Diagram

Installation
11
2.3 Mounting Considerations
Mounting considerations may vary (Flanges, Compression
Fitting, etc.) depending on the application. For underground
tanks, the probe is generally mounted in the riser, resting on
the bottom of the tank. Spacers are used to hold the sensor in
the riser and a cable is suspended from the tank cap.
While most underground tanks are horizontal and fairly
standard in design, above ground tanks vary considerably. The
requirements for mounting these probes are fairly simple.
Since the sensor requires a oat to provide level position, there
is a minimum size required for insertion of the oat into the
tank. It is recommended that a minimum of 2” diameter be
used for the most reliable system.
The size and material of the oat being used will have a slight
impact on the overall accuracy of the measuring system. In
general, the larger the oat the easier it is to provide a high
accuracy measurement.
2.4 Stainless Steel Probe Mounting
2”
8”
Active
Span
Overall
Length
Deadband
Null Zone
Figure 2-2
SS Probe up to 288" (7315mm)

DM330 Series - Magnetostrictive Level System User's Manual
12
2.4.1 Sizing of Stainless Steel Probe
Insertion Length is: Actual length from mounting point to
bottom of tank.
Overall length of probe is: Insertion Length plus 2 inches
(51mm) for Flange mounted probe, and Insertion Length plus
6 inches (152mm) for Compression Fitting mounted probe.
If the probe rests on the bottom of the tank, then the Active
Range of the probe is the Overall Length minus 10 inches
(254mm) [2” (51mm) Dead Band at bottom of the probe and
8” (203mm) for the Null Zone at the top of the probe].
The amount of Active Range in a tank will vary,
depending on the mounting style.
Stainless Steel probes are available in lengths up to 24 feet
(7.3m). Due to difculty with shipping and installation on site,
it is recommend 16 to 18 feet (4.9 to 5.4m) as maximum length
for this style probe, if practical.
Most of the SS Probes are mounted with probe end resting
on bottom of the tank (for non pressurized tanks) or about
½” (12.7mm) from bottom (for pressurized tanks) and held in
position with compression tting at top of tank. A 5/8” x ¾”
adjustable tting is used to mount probe to a ange or adapter.
Minimum process connection depends on the diameter of oat,
but it is suggested to use 2” NPT or larger.
If this compression tting is used, tting should be should be
positioned below “crimp” in tube or a minimum of 4 inches
(102mm) from the top of probe. Hand tighten tting in a non-
pressurized tank. This will allow for a slight movement of probe
when tank expands or contracts. If tank is pressurized, tting
must be tightened.
If a ange is being used, a “D” style connector can be specied to
thread probe directly into ange. This requires more accuracy
in specifying overall length of probe, but eliminates need for
compression tting or adapter bushing. Contact factory if
Welded Flange connection is required.

Installation
13
2.4.2 Assembly of Stainless Steel Probe
1. Standard SS Float Kit should contain a 2 inch 316 stainless
steel oat, spacer and retainer to hold oat on to probe. The
standard retainer is a 316 SS "E-Clip". Optionally, if the
probe is to rest on the bottom of a metal tank, an ECTFE
End-Cap may be supplied With either, a spacer is required
to insure SS oat is positioned in active area of span.
2. Two people are recommended for assembly of probe, one to
hold the probe and the other to assemble components.
3. Slide compression tting if it is being used on probe.
4. Slide reducing bushing or ange on to probe.
5. Slide oat onto probe. Magnet is located in middle of the
oat, so orientation of oat does not make any difference.
6. Slide spacer onto probe.
7. Capture all of these parts with E-Clip or ECTFE foot.
At this point, if probe span is to be set outside the
vessel, then go to Section 2-9 Setting Span before
continuing.
8.0 "Span 2.0"
1.0"
ECTFE foot
or E-Clip
5/8” x ¾” fitting
3/4” x 2” bushing
Mini
Connector
Spacer
Float
Figure 2-3
Stainless Steel Probe Assembly Sequence

DM330 Series - Magnetostrictive Level System User's Manual
14
2.4.3 Insertion of Stainless Steel Probe
CAUTION:
Do not allow oat to drop suddenly since it can
damage retainer at end of probe.
1. Insert bottom end of probe into tank.
2. Thread bushing into tank or flange. Bolt flange into
position.
3. Thread compression tting into bushing or ange.
4. Hand tighten. To insure compression tting is sealed, turn
tting 1 ¼ turns after hand tightening.
5. Make nal check to see that all of bolts and screws are in
proper position and probe is securely tightened.
2.5 Flexible Polyvinylidene Fluoride (PVDF) Probe Mounting
6+”
12”
Active
Span
Overall
Length
1-4”
Deadband
Null Zone
Clearance
Figure 2-4
PVDF Probe up to 480" (12.2 m)
Figure 2-5
PVDF Probe version for Limited
Temperature Range "C" Version
3”
12”
Active
Span
Overall
Length
1”
Less PVDF
expansion
Deadband
Null Zone
Clearance