APG MPX Series User manual

APG
R
Doc #9006029
Part #200503
Rev A, 01/2020
MPX Magnetostrictive Level Sensors
User Manual
For Custody Transfer API 18.2 Compliant Probes

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Table of Contents
Introduction ................................................................................................................ iii
Warranty and Warranty Restrictions.................................................................... iv
Chapter 1: Specications and Options..................................................................... 1
Dimensions ........................................................................................................................................1
Specications ................................................................................................................................... 2
Model Number Congurator...................................................................................................... 3-4
Modbus System Wiring Diagrams ............................................................................................... 5
Chapter 2: Installation and Removal Procedures and Notes..............................6
Tools Needed..................................................................................................................................... 6
Physical Installation Notes ........................................................................................................... 6
Physical Installation Instructions ............................................................................................... 7
Electrical Installation ..................................................................................................................... 7
Removal Instructions ..................................................................................................................... 8
Chapter 3: Programming ............................................................................................8
Modbus Programming .................................................................................................................... 8
Modbus Programming with RST-6001 and APG Modbus Software ...................................... 8
Modbus Register Lists for MPX Ouptut 5 ..............................................................................9-10
MPX Output 5 Modbus Sensor Parameters......................................................................... 11-15
MPX Application Type Parameters...................................................................................... 16-20
Chapter 4: Maintenance ...........................................................................................21
General Care.................................................................................................................................... 21
Repair and Returns........................................................................................................................ 21
Chapter 5: Hazardous Location Installation and Certication.........................22
Hazardous Location and Non-Incendive Wiring Diagrams............................................ 22-23
CSA Certicate of Compliance..............................................................................................24-26

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Introduction
Electrical ratings
Rated 12 - 24 VDC, 80 mA
Class I, Division 1 & 2, Groups C, and D T4 (Ta 85°C)
Ex d IIB T4 (Ta 85°C)
Ex nA IIB T4 (Ta 85°C)
Class I, Zone 1; AEx d IIB T4 (Ta 85°C)
Class I, Zone 2; AEx na IIB T4 (Ta 85°C)
Non-Incendive Wiring Requirements: Vmax Ui= 28VDC, Imax Ii = 200ma, Ci= 0nF, Li = 0μH
IMPORTANT: MPX level sensor MUST be installed according to drawing 9003468
(Hazardous Installation and Non-Incendive Wiring Drawing) on pages 22-23 to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.
Warning: -- The model MPX-T contains titanium in excess of 7.5% for Group II and care needs to be taken
to avoid an ignition hazards due to impact or friction;
AVERTISSEMENT -- Le MPX-T modèle contient du titane en excès de 7,5% pour le groupe II et les soins
doivent être prises pour viter une inammation des dangers dus à des chocs ou frottements.
DANGER: WARNING -- EXPLOSION HAZARD -- SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY
FOR CLASS I, DIVISION 2;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- LA SUBSTITIOND E COMPOSANTSP EUTR ENDRE CE MATERIEL
INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2.
DANGER: WARNING -- EXPLOSION HAZARD -- DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS
BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- AVANT DE DECONNECTER L’EQUIPEMENT, COUPER LE COURANT
OU S’ASSURER QUE L’EMPLACEMENT EST DESIGNE NON DANGEREUX.
US
C
237484
DANGER: OPEN CIRCUIT BEFORE REMOVING COVER or KEEP COVER TIGHT WHILE CIRCUITS ARE ALIVE;
AVERTISSEMENT -- OUVRIR LE CIRCUIT AVANT D’ENLEVER LE COUVERCLE, or GARDER LE COUVERCLE BIEN
FERME TANT QUE LES CIRCUITS SONT SOUS TENSION.
DANGER: WARNING -- POTENTIAL ELECTROSTATIC CHARGING HAZARD - CLEAN ONLY WITH A DAMP
CLOTH;
AVERTISSEMENT -- DANGER DE CHARGE ELECTROSTATIQUE POTENTIEL - NETTOYER SEULEMENT AVEC UN
CHIFFON HUMIDE.
Thank you for purchasing an MPX series magnetostrictive level sensor from APG. We appreciate your
business and your trust. Please take a few minutes to familiarize yourself with your MPX and this manual.
The MPX level sensor provides highly accurate and repeatable level readings in a wide variety of liquid level
measurement applications, including API 18.2 Custody Transfer. It is certied for installation in hazardous
areas in the US and Canada for Class I, Division 1 & 2 and Class I, Zones 1 and 2 environments. The MPX-R’s
large, robust oats allow it to be used in harsh applications where fouling or buildup might otherwise be of
concern, and the MPX-T’s 1” titanium stem provides compatibility in a wide range of corrosive media.
Reading your label
Every APG instrument comes with a label that includes the instrument’s model number, part number,
and serial number. Please ensure that the part number on your label matches your order. The following
electrical ratings and approvals are also listed on the label. Please refer to the CSA Certicate of Compliance
at the back of this manual for further details.

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Warranty and Warranty Restrictions
This product is covered by APG’s warranty to be free from defects in material and workmanship under
normal use and service of the product for 24 months. For a full explanation of our Warranty, please visit
https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to receive a Return
Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.

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Chapter 1: Specications and Options
• Dimensions
MPX-R & MPX-T Sensor and Float Dimensions
5.00”
4.25”
5.71”
4.92”
4.88”
5.00”
5.88”4.98”
3.03”
3.00”
5.50”
3.07”
2.80”
3.08”
Float Ref.
S1=10.63”
S2=6”
Float Ref.
S1=12.25”
S2=4.25”
Float Ref.
S1=12.25”
S2=4.25”
Float Options
Y & Z / L & M
W & X
S & T
U & V / I & J
I & J U & V
4.21”
3.74”
7.32” - 7.44”
6.53” - 6.65”
S1
Dead-Band
(from Zero
Reference to
Float Ref.)
S2
Dead-Band
(from Float
Ref. to bottom
of stem)
Float
Ref.
S1=10”
S2=6.5”
3/4” NPT
1/2” NPT
1.90”
4.94”
4.15”
2.00”
Y & Z
L & M
U & V
I & J
Min. 120”
MPX-R Max. 378”
MPX-T Max. 300”
ZERO
REFERENCE
GROUND
SCREW
Ø 0.27”
3/4” NPT
1/2” NPT
Housing
Connection
Location
Note:
For dual dimensions, large
housing dimensions are
above small housing
dimensions.
Note: MPX-T uses only floats I & J.

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• Specications
Performance
Resolution 0.04 in. (1 mm)
Accuracy ±0.04 in. (±1 mm) over range
API 18.2 Temp Sensor Accuracy: ±0.25°C over -40° to 85° C
±0.13°C over +20° to 70° C
Environmental
Probe Operating Temperature -40° to 85° C (-40° to 185° F)
Storage Temperature -45° to 90° C (-49° to 194° F)
Enclosure Protection NEMA 4X, IP65
Electrical
Supply Voltage 12-24 VDC at sensor
Current Draw 25 mA (typical)
Protection Reverse Polarity
EMI per IEC 61000-4-5
Materials of Construction
Housing Cast aluminum, epoxy coated
Stem MPX-R: 1” Ø 316L SS
MPX-T: 1” Ø Titanium 2
Mounting 316L SS
Compression Fitting (slide) Aluminum with Neoprene bushing
Connectivity
Output Modbus RTU (RS-485) with temperature options
Programming
RS-485 Optional RST-6001 USB-to-RS-485 converter

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• Model Number Congurator
Model Number: MPX - _R_ _5_ _____ - _____ _____ - _____ _____ _____ _B_ - _____ - _AP_
A B C D E F G H I J K
A. Stem Type
□R 1 in. diameter 316L SS
B. Output
□5 Modbus RTU, surge protection, Digital Temp Sensors
C. Housing Type
All Housing Die-cast Aluminum, NEMA 4X, IP65, Blue
□__▲ Large Housing (3/4” conduit connections)
□A Small Housing (1/2” conduit connections)
D. Float 1 (Top Float)
□Z/Y 5.5h x 3d in. Red Polyurethane (0.65/0.94 SG)
□X/W 5 in. Round 316L SS (0.52/0.92 SG)
□V/U 6h x 3d in. Oval 316L SS (0.58/0.94 SG)
□T/S 3 in. Round 316L SS (0.60/0.94 SG)
□M/L 5.5h x 2d in. Red Polyurethane (0.57/0.94 SG)
□J/I 5h x 3d in. Oval Titanium (0.60/0.94 SG)
□N None
E. Float 2 (optional)
□N None
□Y 5.5h x 3d in. Blue Polyurethane (0.94 SG)
□W 5 in. Round 316L SS (0.92 SG)
□U 6h x 3d in. Oval 316L SS (0.94 SG)
□S 3 in. Round 316L SS (0.94 SG)
□L 5.5h x 2d in. Blue Polyurethane (0.94 SG)
□I 5h x 3d in. Oval Titanium (0.94 SG)
F. Mounting Type
□F Flat Face ANSI Flange 150# (Sizes: 2, 2.5, 3, 4, 5, 6)
□R Raised Face ANSI Flange 150# (Sizes: 2, 2.5, 3, 4, 5, 6)
□S Tri Clamp (Sizes: 2, 2.5, 3)
□P NPT Plug 150# (Sizes: 2, 2.5, 3, 4)
□N None
□O Other
▲Note: This option is standard
G. Mounting Size
□__ See Mounting Type for available sizes
H. Mounting Connection
□W Welded (xed)
□S Slide with Compression Fitting (adjustable)
I. Stem/Finish Material
□B316L SS
J. Total Stem Length in Inches
□__ Min. 120 in. - Max. 378 in.
K. Temperature Sensors
□AP Sensor Quantity and Placement per API 18.2 Standard

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Model Number: MPX - _T_ _5_ _____ - _____ _____ - _____ _____ _S_ _C_ - _____ - _AP_
A B C D E F G H I J K
A. Stem Type
□T 1 in. diameter Titanium 2
B. Output
□5 Modbus RTU, surge protection, Digital Temp Sensors
C. Housing Type
All Housing Die-cast Aluminum, NEMA 4X, IP65, Blue
□__▲ Large Housing (3/4” conduit connections)
□A Small Housing (1/2” conduit connections)
D. Float 1 (Top Float)
□J 5h x 3d in. Oval Titanium 2 (0.60 SG)
□I 5h x 3d in. Oval Titanium 2 (0.94 SG)
□N None
E. Float 2 (optional)
□N None
□I 5h x 3d in. Oval Titanium 2 (0.94 SG)
F. Mounting Type†
□F Flat Face ANSI Flange 150# (Sizes: 2, 2.5, 3, 4, 5, 6)
□R Raised Face ANSI Flange 150# (Sizes: 2, 2.5, 3, 4, 5, 6)
□S Tri Clamp (Sizes: 2, 2.5, 3)
□P NPT Plug 150# (Sizes: 2, 2.5, 3, 4)
□N None
□O Other
▲Note: This option is standard
†Note: All listed Mounting Types are 316L stainless steel. Con-
sult factory regarding additional options.
G. Mounting Size
□__ See Mounting Type for available sizes
H. Mounting Connection
□S Slide with Compression Fitting (adjustable)
I. Stem Material
□CTitanium 2
J. Total Stem Length in Inches
□__ Min. 120 in. - Max. 300 in.
K. Temperature Sensors
□AP Sensor Quantity and Placement per API 18.2 Standard

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• Modbus System Wiring Diagrams
IMPORTANT: Refer to Chapter 5 for Hazardous Location and Non-Incendive Wiring
diagram.
Modbus System Wiring
Modbus System Wiring with RST-6001
Power
Supply
+12-24 Vdc
GND Use Shielded Cable
120 Ω
terminating
resistor
120 Ω
terminating
resistor at
last sensor
V+
B
A
Sensor 1
GND
V+
B
A
Sensor 2
GND
V+
B
A
Sensor 3
GND
Master
Device
RS-485 A
RS-485 B
MPX Modbus
series sensor
MPX Modbus
series sensor
MPX Modbus
series sensor
EARTH
GND
Note: Earth Ground terminal is factory
connected to internal housing ground
lug. EARTH
GND
EARTH
GND
Power
Supply
+12-24 Vdc
GND Use Shielded Cable
Equivalent 120 Ω
terminating resistor
internal to RST-6001
120 Ω
terminating
resistor at
last sensor
USB to computer
with APG Modbus
software
RST-6001
Modbus
Controller
V+
B
A
Sensor 1
GND
V+
B
A
Sensor 2
GND
V+
B
A
Sensor 3
GND
A
B
-5V
MPX Modbus
series sensor
+5V
MPX Modbus
series sensor
MPX Modbus
series sensor
Note: An independent +12-24 Vdc
power supply is required when
using an RST-6001 Modbus Controller.
The RST-6001 can only supply ±5 Vdc,
not the +12-24 Vdc required by the MPX.
EARTH
GND
EARTH
GND
EARTH
GND
Note: Earth Ground terminal is factory
connected to internal housing ground lug.
IMPORTANT: For EMI protection on an MPX, either connect the grounding screw (see
page 1) to an earth ground, or ensure that tank mounting of the MPX is grounded.

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Chapter 2: Installation and Removal Procedures and Notes
You will need the following tools to install your MPX level sensor:
• Wrench sized appropriately for MPX mounting
• Wrench sized appropriately for conduit connections
• Flat-head screwdriver for wire terminals
• Channel lock pliers for tightening compression tting
• 1/8” hex Allen wrench for 1-piece MPX-R oat stops
• 3/16” hex Allen wrench for 2-piece MPX-R oat stops
• 1/8” hex Allen wrench for screws on MPX-T oat stops
• Tools Needed
The MPX should be installed in an area--indoors or outdoors--which meets the following conditions:
• Ambient temperature between -40°C and 85°C (-40°F to +185°F)
• Relative humidity up to 100%
• Altitude up to 2000 meters (6560 feet)
• IEC-664-1 Conductive Pollution Degree 1 or 2
• IEC 61010-1 Measurement Category II
• No chemicals corrosive to stainless steel (such as NH3, SO2, Cl2etc.) for MPX-R
• No chemicals incompatible with Titanium Grade 2 for MPX-T
• Ample space for maintenance and inspection
Additional care must be taken to ensure:
• The probe is located away from strong magnetic elds, such as those produced by motors, transform-
ers, solenoid valves, etc.
• The medium is free from metallic substances and other foreign matter.
• No ignition hazards exist due to impact or friction with the titanium stem for MPX-T.
• The probe is not exposed to excessive vibration.
• The oat(s) t through the mounting hole. If the oat(s) does/do not t, it/they must be mounted on
the stem from inside the vessel being monitored.
• The oat(s) is/are oriented properly on the stem (See Figure 2.1). MPX-R and MPX-T oats are typically
installed by customer.
• Physical Installation Notes
DANGER: WARNING -- POTENTIAL ELECTROSTATIC CHARGING HAZARD - CLEAN ONLY WITH A DAMP
CLOTH;
AVERTISSEMENT -- DANGER DE CHARGE ELECTROSTATIQUE POTENTIEL - NETTOYER SEULEMENT AVEC UN
CHIFFON HUMIDE.
Warning: -- The model MPX-T contains titanium in excess of 7.5% for Group II and care needs to be taken
to avoid an ignition hazards due to impact or friction;
AVERTISSEMENT -- Le MPX-T modèle contient du titane en excès de 7,5% pour le groupe II et les soins
doivent être prises pour viter une inammation des dangers dus à des chocs ou frottements.