APG MPX-E Operating Manual

APG

MPX Magnetostrictive Level Sensors

User Manual

For The MPX-E, MPX-E Chemical, and MPX-R

R

Doc #9003761
Rev F, 06/2017

Table of Contents

Introduction ................................................................................................................ iii

Warranty and Warranty Restrictions .................................................................... iv

Chapter 1: Specications and Options.....................................................................1

Dimensions ....................................................................................................................................1-3

Specications ...................................................................................................................................4

Model Number Congurator .......................................................................................................5-7

Electrical Connections and System Wiring Diagrams ........................................................ 8-9

Chapter 2: Installation and Removal Procedures and Notes ............................ 10

Tools Needed ................................................................................................................................... 10

Physical Installation Notes ......................................................................................................... 10

Physical Installation Instructions ..............................................................................................11

Electrical Installation ....................................................................................................................11

Removal Instructions ................................................................................................................... 12

Chapter 3: Programming ..........................................................................................12

Modbus Programming .................................................................................................................. 12

Modbus Programming with RST-6001 and APG Modbus Software .................................... 13

4-20 mA Programming with RST-4100 and APG Modbus Software .................................... 13

Modbus Register Lists For MPX-E/R4 .................................................................................. 13-14

MPX-E/R4 Modbus Sensor Parameters ................................................................................ 15-19

APG Modbus Register Lists for MPX-E/R2 and MPX-E/R3 ............................................. 19-20

MPX-E/R2 and MPX-E/R3 APG Modbus Sensor Parameters ...........................................21-25

MPX-E/R Modbus Application Type Parameters .............................................................. 26-30

Chapter 4: Maintenance ........................................................................................... 31

General Care .................................................................................................................................... 31

Repair and Returns ........................................................................................................................ 31

Chapter 5: Hazardous Location Installation and Certication .........................32

Hazardous Location and Non-Incendive Wiring Diagram .................................................... 32

CSA Certicate of Compliance .............................................................................................. 33-36

ii

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Introduction

237484

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. It is certied for installation in hazardous areas in the US and Canada by CSA
for Class I, Division 1 & 2 and Class I, Zones 1 and 2 environments. The MPX-R’s large, buoyant, and robust
oats allow it to be used in harsh applications where fouling or buildup might otherwise be of concern.
The smaller, lighter weight oats of the MPX-E allow it to be used in applications where space is limited.

The MPX-E Chemical has a chemical resistant coating, allowing for use in corrosive, acidic, and marine

environments.

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 Certicate of Compliance at

the back of this manual for further details.

Electrical ratings

Rated 12 - 24 VDC, 4-20 mA, or 80 mA

Class I, Division 1 & 2, Groups C, and D

Ex d IIB
Ex nA IIB

C

Class I, Zone 1; AEx d IIB
Class I, Zone 2; AEx na IIB

Non-Incendive Wiring Requirements: Vmax Ui= 28VDC, Imax Ii = 200ma, Ci = 0nF, Li = 0μH

US

 IMPORTANT: MPX level sensor MUST be installed according to drawing 9003468 (Haz-

ardous Installation and Non-Incendive Wiring Drawing) on page 32 to meet listed approv­als. Faulty installation will invalidate all safety approvals and ratings.

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 -- 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.

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iii

Warranty and Warranty Restrictions

This product is covered by APG’s waranty 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 recieve 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.

iv

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Chapter 1: Specications and Options

• Dimensions

MPX-E Sensor and Float Dimensions

5.70”

3/4” NPT

5.00”

2.39”

S1

Dead-Band

(from Zero

Reference to

Float Ref.)

S2

Dead-Band

(from Float

Ref. to bottom

of stem)

4.25”

7.39”

Min. 12”

Max. 153”

ZERO
REFERENCE

GROUND
SCREW

2.00”

A & B

2.06”

E

5.00”

Float Options

1.38”

Float Ref.
S1=6”
S2=1.4”

Ø 0.27”

C & D

Float Ref.
S1=6”
S2=1.1”

1.63”

F

Float Ref.

1.87”

1.78”

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S1=6”
S2=2.27”

2.20”

Float Ref.
S1=6”
S2=1.5”

1.47”

1

MPX-E Chemical Sensor and Float Dimensions

5.70”

3/4” NPT

5.00”

2.13”

S1

Dead-Band

(from Zero

Reference to

Float Ref.)

4.25”

7.13”

5.00”

Ø 0.27”

ZERO
REFERENCE

Kynar Float

G

1.88”

Min. 12”

Max. 153”

1.91”

Float Ref.
S1=6”
S2=2.38”

S2

Dead-Band

(from Float

Ref. to bottom

of stem)

Note:

S2 increases to 2.88” if bottom float stop used.

 NOTE: For MPX-E Chemical with E4 output option, there is no ground screw on cou-

pler/NPT. Internal housing ground must be used for lightning protection.

2

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MPX-R Sensor and Float Dimensions

5.70”

3/4” NPT

5.00”

1.65”

S1

Dead-Band

(from Zero

Reference to

Float Ref.)

4.25”

6.65”

ZERO
REFERENCE

GROUND
SCREW

5.90”

U & V

5.00”

Float Options

Float Ref.
S1=10.63”
S2=6”

2.80”

Ø 0.27”

S & T

Float Ref.
S1=12.25”
S2=4.25”

3.07”

S2

Dead-Band

(from Float

Ref. to bottom

of stem)

Min. 48”

Max. 378”

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5.00”

3.03”

W & X

5.10”

Y & Z / P & R / L & M

5.50”

Float Ref.
S1=12.25”
S2=4.25”

3.08”

2.80”

2.00”

Float
Ref.
S1=10”
S2=6.5”

Y & Z
P & R
L & M

3

• Specications

Performance

Resolution 4-20 mA: 14 bit DAC
Modbus: 0.04 in. (1 mm)
Accuracy ±0.05% of Full Scale or 1 mm (whichever is larger)

Environmental

Operating Temperature -40° to 185° F (-40° to 85° C)
Enclosure Protection NEMA 4X, IP65
Maximum Operating Pressure MPX-E Chem: 30 PSIA @ 70° F (21° C)

Electrical

Supply Voltage 12-24 VDC on sensor
Current Draw Modbus (RS-485): 25 mA (MPX-E)
28 mA (MPX-R)
4-20 mA: 22 mA single / 44 mA dual (Max)

Materials of Construction

Housing Cast aluminum, epoxy coated
Stem MPX-E: 0.5” Ø 316L SS

MPX-E Chemical: 0.5” Ø 316L SS with chemical

resistant coating

MPX-R: 1” Ø 316L SS
Mounting (slide) 316L SS
Compression Fitting (slide) Aluminum with Neoprene bushing

Connectivity

Output Modbus RTU (RS-485)
2 wire, loop-powered 4-20 mA
3 wire, loop-powered dual 4-20 mA

Programming

RS-485 Optional RST-6001 USB-to-RS-485 converter
4-20 mA Optional RST-4100 programming module

4

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• Model Number Congurator

Model Number: MPX - _E_ _____ _____ - _____ _____ - _____ _____ _____ _____ - _____ - _____ _____ - ______
A B C D E F G H I J K L N

A. Stem Type

□ E 0.5 in. diameter 316L SS

B. Output

2 Single oat, 4-20 mA (loop powered, 2 wire)

□
□ 3 Dual oat, 4-20 mA (loop powered, 3 wire)
□ 4 Modbus RTU, surge/lightning protection

C. Housing Type

All Housing Die-cast Aluminum, NEMA 4X, IP68, Blue

▲

□ __

Large Housing

□ A Small Housing
□ B Large Housing with window
□ C Small Housing with window

D. Float 1 (Top Float)

□ A 316L SS Round (0.65 SG)
□ B 316L SS Round (0.92 SG)
□ C 316L SS Cylindrical (0.65 SG)
□ D 316L SS Cylindrical (0.92 SG)
□ E Buna-N (0.5 SG)
□ F 316 SS 3A Cylindrical (0.5 SG)

E. Float 2 (optional)

□ N None
□ B 316L SS Round (0.92 SG)

G. Mounting Size

□ __ See Mounting Type for available sizes

H. Mounting Connection

□ W Welded (xed)
□ S Slide with Compression Fitting (adjustable)

I. Stem Material

□ B 316L SS

J. Total Stem Length in Inches

□ __ Min. 12 in. - Max. 153 in.

K. End Plug Options

▲

□ __

0.5 in. Stem, Standard

□ 1 0.5 in. Stem, Keyhole for Cotter Pin

L. Float Stop Options

▲

□ __

0.5 in. Stem, 316L SS, 1 piece, 0.75 in. OD

□ A 0.5 in. Stem, 316L SS, 1 piece, 1.5 in. OD

N. Optional Temperature Sensor

MPX-E4

□ T__ RTD in stem, with location in inches from bottom of

probe (default is 6”)

F. Mounting Type

□ F Flat 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

▲

This option is standard

N. 4-20 Output Set Points

MPX-E2/E3

□ A__ 4mA set point location, in inches from bottom of probe
□ B__ 20mA set point location, in inches from top of probe

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5

Model Number: MPX - _E_ _____ _____ - __G__ __N__ - __P__ __2__ __W__ __D__ - _____ - __4__ _____ - ______
A B C D E F G H I J K L N

A. Stem Type

□ E 0.5 in. diameter 316L SS

B. Output

2 Single oat, 4-20 mA (loop powered, 2 wire)

□
□ 4 Modbus RTU, surge/lightning protection

C. Housing Type

All Housing Die-cast Aluminum, NEMA 4X, IP68, Blue

▲

□ __

Large Housing

□ A Small Housing
□ B Large Housing with window
□ C Small Housing with window

D. Float 1

□ G Kynar Cylindrical (0.66 SG)

E. Float 2

□ N None

F. Mounting Type

□ P NPT Plug 150#

H. Mounting Connection

□ W Welded (xed)

I. Stem Material

□ D 316L SS with chemical resistant coating

J. Total Stem Length in Inches

□ __ Min. 12 in. - Max. 153 in.

K. End Plug Options

□ 4 0.5 in. Stem, chemical resistant coating on 316L SS

L. Float Stop Options

▲

□ F

Top Stop only, 1 piece, 0.5 in. Stem, Kynar

□ G Bottom Stop only, 1 piece, 0.5 in. Stem, Kynar
□ H Top & Bottom Stops, (2) 1 piece, 0.5 in. Stem, Kynar
□ N No Float Stops

N. Optional Temperature Sensor

MPX-E4

□ T__ RTD in stem, with location in inches from bottom of

probe (default is 6”)

G. Mounting Size

□ 2 Size 2

▲

This option is standard

N. 4-20 Output Set Points

MPX-E2

□ A__ 4mA set point location, in inches from bottom of probe
□ B__ 20mA set point location, in inches from top of probe

6

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Model Number: MPX - _R_ _____ _____ - _____ _____ - _____ _____ _____ _B_ - _____ - _____ _____ - ______
A B C D E F G H I J K L N

A. Stem Type

□ R 1 in. diameter 316L SS

B. Output

2 Single oat, 4-20 mA (loop powered, 2 wire)

□
□ 3 Dual oat, 4-20 mA (loop powered, 3 wire)
□ 4 Modbus RTU, surge/lightning protection, stem RTD

temperature sensor

Note: stem RTD is located 6” from bottom of probe

C. Housing Type

All Housing Die-cast Aluminum, NEMA 4X, IP68, Blue

▲

□ __

Large Housing

□ B Large Housing with window

D. Float 1 (Top Float)

□ Z 5.5h x 3d in. Red Polyurethane (0.65 SG)
□ Y 5.5h x 3d in. Blue Polyurethane (0.94 SG)
□ X 5 in. Round 316L SS (0.52 SG)
□ W 5 in. Round 316L SS (0.92 SG)
□ V 6h x 3d in. Oval 316L SS (0.58 SG)
□ U 6h x 3d in. Oval 316L SS (0.94 SG)
□ T 3 in. Round 316L SS (0.60 SG)
□ S 3 in. Round 316L SS (0.94 SG)
□ R 5.5h x 2.8d in. Red Polyurethane (0.59 SG)
□ P 5.5h x 2.8d in. Blue Polyurethane (0.94 SG)
□ M 5.5h x 2d in. Red Polyurethane (0.57 SG)
□ L 5.5h x 2d in. Blue Polyurethane (0.94 SG)
□ N None
□ O Other

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)
□ P 5.5h x 2.8d in. Blue Polyurethane (0.94 SG)
□ L 5.5h x 2d in. Blue Polyurethane (0.94 SG)
□ O Other

F. Mounting Type

□ F Flat 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

G. Mounting Size

□ __ See Mounting Type for available sizes

H. Mounting Connection

□ W Welded (xed)
□ S Slide with Compression Fitting (adjustable)

I. Stem Material

□ B 316L SS

J. Total Stem Length in Inches

□ __ Min. 48 in. - Max. 378 in.

K. End Plug Options

▲

□ __

1 in. Stem, Standard

□ 2 1 in. Stem, Keyhole for Cotter Pin
□ 3 1 in. Stem, 3/8-16 x .6” L Threads

L. Float Stop Options

▲

□ __

1 in. Stem, 316L SS, 1 piece, 1.5 in. OD

□ C 1 in. Stem, 316L SS, 2 piece, 1.75 in. OD
□ D 1 in. Stem, Titanium 2, 1 piece, 1.5 in. OD

N. 4-20 Output Set Points

MPX-R2/R3

□ A__ 4mA set point location, in inches from bottom of probe
□ B__ 20mA set point location, in inches from top of probe

▲

This option is standard

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7

• Electrical Connections and System Wiring Diagrams

Modbus System Wiring For MPX-E4, MPX-R4 Sensors

Power
Supply

Master
Device

+12-24 Vdc

GND

RS-485 A

RS-485 B

Use Shielded Cable

120 Ω

terminating
resistor

Note: Earth Ground terminal is factory
connected to internal housing ground
lug.

MPX-E4, -R4
series sensor

Sensor 1

V+

B
A

GND

EARTH

GND

MPX-E4, -R4
series sensor

Sensor 2

V+

B
A

GND

EARTH

GND

Modbus System Wiring with RST-6001 For MPX-E4, MPX-R4 Sensors

Power
Supply

+12-24 Vdc

GND

Use Shielded Cable

MPX-E4, -R4
series sensor

Sensor 3

V+

B
A

GND

EARTH

GND

120 Ω

terminating
resistor at
last sensor

RST-6001

Modbus

Controller

USB to computer
with APG Modbus
software

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.

Note: Earth Ground terminal is factory
connected to internal housing ground lug.

IMPORTANT: Refer to Chapter 5 for Hazardous Location and Non-Incendive Wiring



A
B

-5V

+5V

Equivalent 120 Ω

terminating resistor
internal to RST-6001

MPX-E4, -R4
series sensor

Sensor 1

V+

B
A

GND

EARTH

GND

MPX-E4, -R4
series sensor

Sensor 2

V+

B
A

GND

EARTH

GND

MPX-E4, -R4
series sensor

Sensor 3

V+

B
A

GND

EARTH

GND

diagram.

 IMPORTANT: For lightning and surge protection on MPX-E4 or -R4, either connect the

grounding screw (see pages 1-3) to an earth ground, or ensure that the tank mounting of
the MPX is grounded.

120 Ω

terminating
resistor at
last sensor

8

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4-20 mA Loop Wiring

4-20 mA Dual Float Loop Wiring

4-20 mA Single Float Loop Wiring

(MPX-E2 and MPX-R2 Series)

+

Sensor

12-24 Vdc

Out

Power Source

(12-24 Vdc)

Receiver

Input Com

 IMPORTANT: Refer to Chapter 5

for Hazardous Location and Non-In­cendive Wiring diagram.

4-20 mA Programming Wiring

(MPX-E3 and MPX-R3 Series)

−

−

Sensor

12-24 Vdc

Out 1
Out 2

+

Power Source

(12-24 Vdc)

Receiver

Input 1 Input 2 Com

OR

−

+

Sensor

12-24 Vdc

Out 1
Out 2

Power Source

Receiver 1

Input Com

(12-24 Vdc)

Receiver 2

Input Com

Programming configuration is

for programming ONLY. After
programming, sensor must be
reintegrated to 4-20 mA loop
for proper system operation.

RST-4100

MPX-E2, -R2 or
MPX-E3, -R3 series
sensor.

Sensor

12-24 Vdc

Out (1)

Out 2

Out 24V

Load Resistor

(150 Ω to 700 Ω)

Wired in series for

programming.

USB to computer
with APG Modbus
software

Programming Module
and APG Modbus software
required for programming
MPX-E2, -R2 and MPX-E3,

-R3 series sensors.

Note: a minimum of
14 Vdc is required to
establish communications
with the RST-4100

+

Power

Source

(14- 24 Vdc)

−

 NOTE: For MPX-E3 & MPX-R3 se-

ries sensors, - Vdc from power source
must be connected to Output1 on
sensor for correct sensor program­ming.

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9

Chapter 2: Installation and Removal Procedures and Notes

• Tools Needed

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

• 3/32” hex Allen wrench for 1-piece MPX-E oat stops

• 1/8” hex Allen wrench for 1-piece MPX-R oat stops

• 3/16” hex Allen wrench for 2-piece MPX-R oat stops

• Physical Installation Notes

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, Cl2 etc.)

• 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, transform­ers, solenoid valves, etc.

• The medium is free from metallic substances and other foreign matter.

• 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-E oats will be installed by the
factory. MPX-R oats are typically installed by customer.



NOTE: For MPX-E Chemical sensors: Chemical resitant coating will scar and expose
stainless steel if scraped or abused. Use caution when handling. Always transport in pack­aging to protect probe and coating.

10

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Taper

 IMPORTANT: Floats must be oriented proper-

ly on the stem, or sensor readings will be inac-

curate and unreliable. Untapered oats will have

UP

a sticker indicating the top of the oat. Remove

sticker prior to use.

Figure 2.1

 IMPORTANT: MPX level sensor MUST be installed according to drawing 9003468 (Haz-

ardous Installation and Non-Incendive Wiring Drawing) on page 32 to meet listed approv­als. Faulty installation will invalidate all safety approvals and ratings.

• Physical Installation Instructions

• If your sensor’s stem and oats t through the mounting hole, carefully lower the assembly into the
vessel, then secure the sensor to the vessel.

• If the oats do not t, mount them on the stem from inside the vessel being monitored. Then secure

the sensor to the vessel.

• For sensors with oat stops, refer to the assembly drawing included with the sensor for oat stop

installation locations.

• For MPX-E Chemical, ensure probe is concentric with tting so as not to scrape chemical resistant coat­ing o against threads of tting.

• Electrical Installation

• Remove the housing cover of your MPX.

• Feed system wires into MPX through 3/4” NPT conduit openings. Fittings must be UL/CSA Listed for CSA
installation.

• Connect wires to MPX terminals. Use crimped ferruls on wires, if possible.

• Replace the housing cover.

• For lightning and surge protection on MPX-E4 and MPX-R4 models, either connect the grounding screw

(see dimensions on page 1-3) to an earth ground, or ensure that tank mounting of MPX is grounded.

See Electrical Connections and System Wiring Diagrams (pages 8-9) for Modbus and 4-20 mA wiring
examples.

NOTE: For MPX-E Chemical with E4 output option, there is no ground screw on cou-



pler/NPT. Internal housing ground must be used for lightning protection.

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11

• Removal Instructions

Removing your MPX level sensor from service should be done with care.

• If the oats on your sensor t through the mounting hole, carefully lift the entire sensor assembly out

of and away from the vessel.

• If the oats on your sensor do not t through the mounting hole, they will need to be removed from
the stem before the sensor can be removed. Be sure to drain the vessel being monitored to allow ac­cess to the oats and stem for removal.

• Clean the stem and oats of any build up or debris and inspect for damage.

• Store your sensor in a dry place, at a temperature between -40° F and 180° F.

Chapter 3: Programming

• Modbus Programming

MPX-E4 and MPX-R4 series sensors use standard Modbus RTU protocol (RS-485). The sensors can only oper­ate as slave devices. Sensor default transmission settings are 9600 Baud, 8 Bits, 1 Stop Bit, No Parity, and
require a minimum delay of 300 ms between transactions. See MPX-E/R4 Modbus Register Lists on pages 13
and 14.

 NOTE: For more information about Modbus RTU, please visit www.modbus.org.

 NOTE: MPX-E1 and MPX-R1 legacy models have the same Modbus settings and regis-

ters as MPX-E4 and MPX-R4.

12

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• Modbus Programming with RST-6001 and APG Modbus Software

An APG RST-6001 Modbus Controller can be used in tandem with APG Modbus to program and control up
to 20 MPX-E/R1 (legacy models) or MPX-E/R4 series sensors. Through APG Modbus, you can monitor the raw
readings from the sensor, congure the data for distance, level, volume, or weight, and enter measurements
for a strapping chart. See MPX-E/R4 Modbus Register Lists on pages 13 and 14.

 NOTE: For APG Modbus programming instructions, or to download APG Modbus soft-

ware, please visit www.apgsensors.com/suppport.

• 4-20 mA Programming with RST-4100 and APG Modbus Software

An APG RST-4100 Programming Module can be used in tandem with APG Modbus to program a single
MPX-E2/3 or MPX-R2/3 series sensor. Through APG Modbus, you can congure the 4 mA and 20 mA output
setpoints and calibration settings. If your monitoring equipment (PLC, etc.) can be congured to interpret
the 4-20 mA output(s) of the MPX as volume, then the MPX can be congured accordingly via APG Modbus.
See MPX-E/R2 & MPX-E/R3 Modbus Register Lists on pages 19 and 20.

However, the RST-4100 is not designed to be used for continuous monitoring of a sensor. After
programming your MPX sensor, the RST-4100 must be removed and the wiring returned to normal. See 4-20
mA Loop Wiring and 4-20 mA Programming Wiring on page 9.

• Modbus Register Lists for MPX-E/R4

Input Registers (0x04)

Register Returned Data

30300 Raw Top Float Reading (in mm, unsigned)
30301 Raw Bottom Float Reading (in mm, unsigned)
30302 Temperature Reading (in 0C, signed)
30303-30304 Calculated Top Float Reading (in selected Units)
30305-30306 Calculated Bottom Float Reading (in selected Units)
30307 Version

 NOTE: The Calculated Readings will be returned without a decimal place. In order to

obtain the true result, the Decimal Place setting must be taken into account.

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13

Holding Registers (0x03)

Register Function Value Range

40400 Device Address 1 to 247
40401 Units 1, 2, 3
40402 Application Type 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
40403 Volume Units 1, 2, 3, 4, 5, 6, 7
40404 Decimal Place 0, 1, 2, 3
40405 †Max Distance 0 to 11,278 mm
40406 Full Distance 0 to 10,364 mm
40407 Empty Distance 0 to 11,278 mm
40408 †Sensitivity 0 to 100
40409 †Pulses 0 to 20
40410 †Blanking 0 to 10,364 mm
40411 NA NA
40412 †Averaging 1 to 31
40413 †Filter Window 0 to 10,364 mm
40414 †Out of Range Samples 1 to 255
40415 †Sample Rate 10 to 1,000 msec.
40416 †Multiplier 1 to 1,999 (1000 = 1.000)
40417 †Oset -10,364 to 10,364 mm
40418 †Pre lter 0 to 10,364 mm
40419 †Noise limit 0 to 255
40420 Temperature Select 0 to 8*
40421 †RTD Oset (0C) -100 to 100
40422 †Float Window 0 to 1,000 mm 0=1 oat
40423 †1st Float Oset -10,364 to 10,364
40424 †2nd Float Oset -10,364 to 10,364
40425 †Gain Oset 0 to 255
40426 4 mA Set Point NA*
40427 20 mA Set Point NA*
40428 4 mA Calibration NA*
40429 20 mA Calibration NA*
40430 t1d NA*
40431 t1w NA*
40432 t1t NA*
40433 t2d NA*
40434 t2w NA*
40435 t2t NA*
40436-40437 Parameter 1 Data 0 to 1,000,000 mm
40438-40439 Parameter 2 Data 0 to 1,000,000 mm
40440-40441 Parameter 3 Data 0 to 1,000,000 mm
40442-40443 Parameter 4 Data 0 to 1,000,000 mm
40444-40445 Parameter 5 Data 0 to 1,000,000 mm

*These registers are not used by the MPX-E4 or -R4, even though they are labeled in the APG Modbus

software.

†Setting is factory calibrated. Do not adjust.

14

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• MPX-E/R4 Modbus Sensor Parameters

40401 - Units

Determines the units of measure for the calculated reading when Application Type is set to 0, 1, or 7.
1 = Feet 2 = Inches 3 = Meters

40402 - Application Type

Determines the type of calculated reading performed by the sensor.
0 = Distance
1 = Level
2 = Standing Cylindrical Tank with or without Hemispherical Bottom
3 = Standing Cylindrical Tank with or without Conical Bottom
4 = Standing Rectangular Tank with or without Chute Bottom
5 = Horizontal Cylindrical Tank with or without Spherical Ends
6 = Spherical Tank
7 = Pounds (Linear Scaling)
8 = N/A
9 = Vertical Oval Tank
10 = Horizontal Oval Tank
11 = Strapping Chart
See MPX-E/R Modbus Application Type Parameters pages 26-30.

40403 - Volume Units

Determines the units of measure for the calculated reading when Application Type is set to 2 - 6 or 9 -11.
1 = Feet3 5 = Liters
2 = Million Feet3 6 = Inches3
3 = Gallons 7 = Barrels
4 = Meters3

40404 - Decimal Place

Determines the number of decimal places included in the Calculated Reading(s). The Calculated Reading will

always be returned as a whole number.

For example, a Calculated Reading of 1126.658 (gallons, ft3, etc.) will be returned as follows:
Decimal Place = 0 Volume = 1127 (rounded to nearest whole number)
Decimal Place = 1 Volume = 11267 (divide by 10 to get true result)
Decimal Place = 2 Volume = 112666 (divide by 100 to get true result)
Decimal Place = 3 Volume = 1126658 (divide by 1000 to get true result)

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15

40405 - Maximum Distance (Factory Calibrated)

Sets the distance (beginning from the Zero Reference) to the point where the sensor will stop looking for
oat signals, usually the bottom of the stem. A oat beyond the Maximum Distance value will not be detect-

ed.

40406 - Full Distance

Sets the positive distance (beginning from the sensor Zero Reference) to the point where the monitored

vessel is considered full.

40407 - Empty Distance

Sets the positive distance (beginning from the Zero Reference) to the point where the monitored vessel is
considered empty (usually the bottom of the stem).

40408 - Sensitivity (Factory Calibrated)

Sets the level of gain that is applied to the returning oat signal.

40409 - Pulses (Factory Calibrated)

Controls the duration of the signal being sent down the magnetostrictive wire.

40410 - Blanking (Factory Calibrated)

Sets the blanking distance, which is the zone from the Zero Reference of the sensor to the point from which
the rst signal will be valid. Signals from a oat in the blanking area will be ignored.

40412 - Averaging (Factory Calibrated)

Sets the number of qualied received oat signals to average for the raw reading. Qualied received signals
are placed in a rst-in, rst-out buer, the contents of which are averaged for the raw reading. The larger
the number of qualied received signals being averaged, the smoother the reading will be, and the slower

the reading will be to react to quickly changing targets.

16

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Example:

of Distance

40413 - Filter Window (Factory Calibrated)

Determines the physical range (0 - 10,364 mm) of qualied received signals, based on the current raw
reading. Signals beyond the +/- Filter Window range of the current reading will not qualify unless the
average moves. Signals outside the extents of the Filter Window are written to the Out of Range samples
buer (Holding Register 40414). See Figure 3.1.

Window = 300 mm
Out of Range Samples = 10

All samples

Samples are rejected within
this area unless they persist

for 10 consecutive samples

Current value

Min. Reading Max. Reading

are accepted

within this area

150 mm 150mm

Figure 3.1

Samples are rejected within
this area unless they persist

for 10 consecutive samples

40414 - Out of Range Samples (Factory Calibrated)

Sets the number of consecutive samples outside the Filter Window (Holding Register 40413) necessary to
automatically adjust the current reading and move the Filter Window.

40415 - Sample Rate (Factory Calibrated)

Sets the update rate of the sensor (between 10 - 1000 ms). Shorter time delays allow for quicker sensor
response times to changing levels. Typical setting is 200 ms. Settings under 200 ms are not recommended.

40416 - Multiplier (Factory Calibrated)

Calibrates the distance reading span. The Multiplier is shown by the values 1 - 1999, but these values are
understood to represent 0.001 - 1.999. The default of 1000 (i.e. 1.000) is used for most applications.

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17

40417 - Oset (Factory Calibrated)

Sets the Zero Reference of the sensor, the point from which the calculated distance is measured.

40418 - Pre lter

Denes the physical range (0 - 10,364 mm) of the start up (pre-lter) window. Four sample readings must be
found within the Pre lter window for the MPX sensor to successfully start up.

This register is used for factory diagnostics only.

40419 - Noise limit

Sets the limit for number of signals (0-255) outside the Pre lter range for the MPX at start up. If the Noise
Limit is reached before four readings register within the Pre lter window, the MPX will not start up.

This register is used for factory diagnostics only.

40420 - Temperature Select

Selects the temperature sensor reading to be displayed in Input Register 30302.

MPX-E/R4 sensors are limited to a single RTD sensor in the stem. Only options 0 and 8 work for the MPX-E/
R4.

0 = RTD
1 = Digital Temperature Sensor A 5 = Digital Temperature Sensor E
2 = Digital Temperature Sensor B 6 =
3 = Digital Temperature Sensor C 7 =
4 = Digital Temperature Sensor D 8 = Digital Temperature Sensor on Circuit Board

 NOTE: MPX-E1 and MPX-R1 legacy models will only work with option 0.

40421 - RTD Oset C° (Factoy Calibrated)

Calibrates the RTD termperature sensor.

18

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40422 - Float Window (Factory Calibrated)

Sets the distance (0 - 1000 mm) between the rst (i.e. top) oat and the point at which the sensor will begin
looking for the second (bottom) oat. 0 indicates a single oat.

40423 - 1st Float Oset (Factory Calibrated)

Used to calibrate top oat reading (-10,364 - 10,364 mm).

40424 - 2nd Float Oset (Factory Calibrated)

Used to calibrate bottom oat reading (-10,364 - 10,364 mm).

40425 - Gain Oset (Factory Calibrated)

Used to move the centerline of the oat response signal to optimize signal strength (0 - 255).

• APG Modbus Register Lists for MPX-E/R2 and MPX-E/R3

Input Registers (0x04)

Register Returned Data

30300 Raw Top Float Reading (in mm, unsigned)
30301 Raw Bottom Float Reading (in mm, unsigned)
30302 Temperature Reading (in 0C, signed)
30303-30304 Calculated Top Float Reading (in selected Units)
30305-30306 Calculated Bottom Float Reading (in selected Units)
30307 Version

 NOTE: Input Register values for MPX-E/R2 and MPX-E/R3 are only visible while pro-

gramming via the RST-4100.

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19

Holding Registers (0x03)

Register Function Value Range

40400 Device Address 1 to 247*
40401 Units 1, 2, 3
40402 Application Type 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
40403 Volume Units 1, 2, 3, 4, 5, 6, 7
40404 Decimal Place 0, 1, 2, 3*
40405 †Max Distance 0 to 10,364 mm
40406 Full Distance 0 to 10,364 mm
40407 Empty Distance 0 to 10,364 mm
40408 †Sensitivity 0 to 100
40409 †Pulses 0 to 20
40410 †Blanking 0 to 10,364 mm
40411 Fail Safe 0 = Disable, 1 = 3.8 mA, 2 = 22 mA
40412 †Averaging 1 to 31
40413 †Filter Window 0 to 10,364 mm
40414 †Out of Range Samples 1 to 255
40415 †Sample Rate 10 to 1,000 msec.
40416 †Multiplier 1 to 1,999 (1000 = 1.000)
40417 †Oset -10,364 to 10,364 mm
40418 †Pre lter 0 to 10,364 mm
40419 †Noise limit 0 to 255
40420 NA NA
40421 †RTD Oset (0C) -100 to 100
40422 †Float Window 0 to 1,000 mm 0=1 oat
40423 †1st Float Oset -10,364 to 10,364
40424 †2nd Float Oset -10,364 to 10,364
40425 †Gain Oset 0 to 255
40426 4 mA Set Point 0 - 10,364 mm
40427 20 mA Set Point 0 - 10,364 mm
40428 †4 mA Calibration 0 - 1,000
40429 †20 mA Calibration 0 - 1,000
40430 t1d NA*
40431 t1w NA*
40432 t1t NA*
40433 t2d NA*
40434 t2w NA*
40435 t2t NA*
40436-40437 Parameter 1 Data 0 to 1,000,000 mm
40438-40439 Parameter 2 Data 0 to 1,000,000 mm
40440-40441 Parameter 3 Data 0 to 1,000,000 mm
40442-40443 Parameter 4 Data 0 to 1,000,000 mm
40444-40445 Parameter 5 Data 0 to 1,000,000 mm

*These registers are not used by the MPX-E/R2 or MPX-E/R3, even though they are labeled in the APG

Modbus software.

†Setting is factory calibrated. Do not adjust.

20

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• MPX-E/R2 and MPX-E/R3 APG Modbus Sensor Parameters

40401 - Units

Determines the units of measure for the Calculated Reading when Application Type is set to 0, 1, or 7.
1 = Feet 2 = Inches 3 = Meters
For MPX-E/R2 and MPX-E/R3, this is seen only when using APG Modbus to program the MPX. This setting
does not affect the 4-20 mA output.

40402 - Application Type

Determines the type of Calculated Reading performed by the sensor.
0 = Distance
1 = Level
2 = Standing Cylindrical Tank with or without Hemispherical Bottom
3 = Standing Cylindrical Tank with or without Conical Bottom
4 = Standing Rectangular Tank with or without Chute Bottom
5 = Horizontal Cylindrical Tank with or without Spherical Ends
6 = Spherical Tank
7 = Pounds (Linear Scaling)
8 = N/A
9 = Vertical Oval Tank
10 = Horizontal Oval Tank
11 = Strapping Chart
See MPX-E/R Modbus Application Type Parameters pages 26-30.

For the MPX-E/R2 and MPX-E/R3, the 4-20 mA output can be scaled for linear output over distance/level or
scaled for linear output over volume. When setup in any of the volumetric application types, the 4-20mA
output becomes linear with regards to the volume (linear mA change per gallon, liter, etc.)

40403 - Volume Units

Determines the units of measure for the Calculated Reading when Application Type is set to 2 - 6 or 9 -11.
1 = Feet3 5 = Liters
2 = Million Feet3 6 = Inches3
3 = Gallons 7 = Barrels
4 = Meters3

40404 - Decimal Place

Determines the number of decimal places included in the Calculated Reading(s). For MPX-E/R2 and MPX-E/
R3, this is seen only when using APG Modbus to program the MPX. This setting does not affect the 4-20 mA

output.

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21

40405 - Maximum Distance (Factory Calibrated)

Sets the distance (beginning from the Zero Reference) to the point where the sensor will stop looking for
oat signals, usually the bottom of the stem. A oat beyond the Maximum Distance value will not be detect-

ed.

40406 - Full Distance

Sets the positive distance (beginning from the sensor Zero Reference) to the point where the monitored

vessel is considered full.

40407 - Empty Distance

Sets the positive distance (beginning from the Zero Reference) to the point where the monitored vessel is
considered empty (usually the bottom of the stem).

40408 - Sensitivity (Factory Calibrated)

Sets the level of gain that is applied to the returning oat signal.

40409 - Pulses (Factory Calibrated)

Controls the duration of the signal being sent down the magnetostrictive wire.

40410 - Blanking (Factory Calibrated)

Sets the blanking distance, which is the zone from the Zero Reference of the sensor to the point from which
the rst signal will be valid. Signals from a oat in the blanking area will be ignored.

40411 - Fail Safe

Sets the output condition that the MPX will revert to in the event of a loss of return signal condition.
0 = Disable (no fail safe output)
1 = 3.8 mA
2 = 22 mA

22

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40412 - Averaging (Factory Calibrated)

Sets the number of qualied received oat signals to average for the raw reading. Qualied received signals
are placed in a rst-in, rst-out buer, the contents of which are averaged for the raw reading. The larger
the number of qualied received signals being averaged, the smoother the reading will be, and the slower

the reading will be to react to quickly changing targets.

40413 - Filter Window (Factory Calibrated)

Determines the physical range (0 - 10,364 mm) of qualied received signals, based on the current raw
reading. Signals beyond the +/- Filter Window range of the current reading will not qualify unless the
average moves. Signals outside the extents of the Filter Window are written to the Out of Range samples
buer (Holding Register 40414). See Figure 3.2.

Example:
Window = 300 mm
Out of Range Samples = 10

All samples

Samples are rejected within
this area unless they persist

for 10 consecutive samples

Min. Reading Max. Reading

Current value

of Distance

are accepted

within this area

150 mm 150mm

Samples are rejected within
this area unless they persist

for 10 consecutive samples

Figure 3.2

40414 - Out of Range Samples (Factory Calibrated)

Sets the number of consecutive samples outside the Filter Window (Holding Register 40413) necessary to
automatically adjust the current reading and move the Filter Window.

40415 - Sample Rate (Factory Calibrated)

Sets the update rate the sensor (10 - 1000 ms). Shorter time delays allow for quicker sensor response times
to changing levels. Typical setting is 200 ms. Settings under 200 ms are not recommended.

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23

40416 - Multiplier (Factory Calibrated)

Calibrates the distance reading span. The Multiplier is shown by the values 1 - 1999, but these values are
understood to represent 0.001 - 1.999. The default of 1000 (i.e. 1.000) is used for most applications.

40417 - Oset (Factory Calibrated)

Sets the Zero Reference of the sensor, the point from which the calculated distance is measured.

40418 - Pre lter

Denes the physical range (0 - 10,364 mm) of the start up (pre-lter) window. Four sample readings must be
found within the Pre lter window for the MPX sensor to successfully start up.

This register is used for factory diagnostics only.

40419 - Noise limit

Sets the limit for number of signals (0-255) outside the Pre lter range for the MPX at start up. If the Noise
Limit is reached before four readings register within the Pre lter window, the MPX will not start up.

This register is used for factory diagnostics only.

40421 - RTD Oset C° (Factory Calibrated)

Calibrates the RTD termperature sensor.

40422 - Float Window (Factory Calibrated)

Sets the distance (0 - 1000 mm) between the rst (i.e. top) oat and the point at which the sensor will begin
looking for the second (bottom) oat. This essentially functions as a secondary blanking distance for the
minimum depth of the top uid. Set to 0 for single oat.

24

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40423 - 1st Float Oset (Factory Calibrated)

Used to calibrate top oat reading (-10,364 - 10,364 mm).

40424 - 2nd Float Oset (Factory Calibrated)

Used to calibrate bottom oat reading (-10,364 - 10,364 mm).

40425 - Gain Oset (Factory Calibrated)

Used to move the centerline of the oat response signal to optimize signal strength (0 - 255).

40426 - 4mA Set

Used to set the distance which will correspond to an output of 4 mA. For Application 1 (Distance), this is
measured from the Zero Reference. For all other applications (Level & Volumetric) this is measured from the

bottom of the probe.

40427 - 20mA Set

Used to set the distance which will correspond to an output of 20 mA. For Application 1 (Distance), this is
measured from the Zero Reference. For all other applications (Level & Volumetric) this is measured from the

bottom of the probe.

40428 - 4mA Cal (Factory Calibrated)

Used to calibrate the 4 mA output of the MPX-E/R2 or -E/R3.

40429 - 20mA Cal (Factory Calibrated)

Used to calibrate the 20 mA output of the MPX-E/R2 or -E/R3.

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25

Bottom
Radius

• MPX-E/R Modbus Application Type Parameters

Application 0 - Distance

Register Function Value Range

40400 Device Address 1 to 247
40401 Units 1 = Feet, 2 = Inches, 3 = Meters
40402 Application Type 0
40403 Volume Units -­40404 Decimal (Calculated) 0 - 3

Application 1 - Level

Register Function Value Range

40400 Device Address 1 to 247
40401 Units 1 = Feet, 2 = Inches, 3 = Meters
40402 Application Type 1
40403 Volume Units -­40404 Decimal (Calculated) 0 - 3

Application 2 - Volume of Standing Cylindrical Tank ± Hemispherical Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 2
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm /
0 - 10,364 mm

40436-40437 Tank Diameter 0 - 1,000,000 (mm)
40438-40439 Radius of Bottom Hemisphere 0 - 1,000,000 (mm)



NOTE: For all applications other than Distance, Empty Distance is usually the same as

Full

Level

or

Diameter

Max Distance.

26

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Application 3 - Volume of Standing Cylindrical Tank ± Conical Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 3
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm /
0 - 10,364 mm

40436-40437 Tank Diameter 0 - 1,000,000 (mm)
40438-40439 Cone Diameter (at bottom of cone) 0 - 1,000,000 (mm)
40440-40441 Length (height) of Cone 0 - 1,000,000 (mm)

Application 4 - Volume of Standing Rectangular Tank ± Chute Bottom

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 4
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm /
0 - 10,364 mm

Full

Level

Full

Level

Tank X

Diameter

Cone

Diameter

Cone

Length

Tank Y

40436-40437 Tank X Dimension 0 - 1,000,000 (mm)
40438-40439 Tank Y Dimension 0 - 1,000,000 (mm)
40440-40441 Chute X Dimension 0 - 1,000,000 (mm)
40442-40443 Chute Y Dimension 0 - 1,000,000 (mm)
40444-40445 Length (height) of Chute 0 - 1,000,000 (mm)

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or

Chute
Length

Chute X

Chute Y

27

Application 5 - Volume of Horizontal Cylindrical Tank ± Hemispherical Ends

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 5
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Diameter 0 - 1,000,000 (mm)
40440-40441 Radius of End Hemispheres 0 - 1,000,000 (mm)

End
Radius

Diameter

Length

Full

Level

Application 6 - Volume of Spherical Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 6
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 Tank Diameter 0 - 1,000,000 (mm)

Full

Level

Diameter

28

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Application 7 - Pounds (Linear Scaling)

Register Function Value Range

40400 Device Address 1 to 247
40401 Units 1 = Feet, 2 = Inches, 3 = Meters
40402 Application Type 7
40403 Volume Units -­40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 Multiplier (linear scalar) 0 - 1,000,000 (1000 = 1.000)

Application 8 - N/A

Application 9 - Volume of Vertical Oval Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 9
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Depth 0 - 1,000,000 (mm)
40440-40441 Tank Width 0 - 1,000,000 (mm)

Full

Level

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Width

Depth

Length

29

Application 10 - Volume of Horizontal Oval Tank

Register Function Value Range

40400 Device Address 1 to 247
40401 Units --
40402 Application Type 10
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 Tank Length 0 - 1,000,000 (mm)
40438-40439 Tank Depth 0 - 1,000,000 (mm)
40440-40441 Tank Width 0 - 1,000,000 (mm)

Full

Level

Depth

Width

Length

Application 11 - Strapping Chart (Polynomial Values)

Register Function Value Range

40400 Device Address 1 to 247
40401 Units 1 = Feet, 2 = Inches, 3 = Meters
40402 Application Type 11
40403 Volume Units 1 - 7
40404 Decimal (Calculated) 0 - 3
40405 Max Distance (factory set)
40406 Full Distance 0 - 10,364 mm
40407 Empty Distance 0 - 11,278 mm / 0 - 10,364 mm

40436-40437 X^3 Coecient 0 - 1,000,000
40438-40439 X^2 Coecient 0 - 1,000,000
40440-40441 X^1 Coecient 0 - 1,000,000
40442-40443 X^0 Coecient 0 - 1,000,000

30

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Chapter 4: Maintenance

• General Care

Your MPX level sensor is designed to be low maintenance. However, in general, you should:

• Periodically inspect your MPX to ensure the stem and oats are free of any heavy buildup that might
impede the movement of the oats.

• Ensure the housing cover is snuggly secured. If the cover becomes damaged or is misplaced, order a

replacement immediately.

• Repair and Returns

The MPX-E Chemical’s chemical resistant coating is a durable thermoplastic. This means that if damage
occurs, repair is possible:

• Use a heat gun on a low setting to heat the damaged location until coating becomes soft and mallea­ble. If coating begins to ripple or bubble, too much heat has been applied.

• With a blunt object, gently smear the coating to recover the damaged area.

• Allow chemical resistant coating patch to cool before reinstalling probe.

• Keep MPX-E Chemical probe and chemical resistant coating away from ammable material during

repair.

NOTE: If the damaged area is greater than 0.1”, it is recommended to use a supple-



mental patch of chemical resistant coating.

Should your MPX level sensor require service, please contact the factory via phone, email, or online chat. We
will issue you a Return Material Authorization (RMA) number with instructions.

• Phone: [phone]

• Email: [e-mail]

• Online chat at www.apgsensors.com

Please have your part number and serial number available. See Warranty and Warranty Restrictions for

more information.

 IMPORTANT: All repairs and adjustments of the MPX level sensor must be made by

the factory. Modifying, disassembling, or altering the MPX, other than patching the chemi­cal resistant coating on an MPX-E Chemical probe, is strictly prohibited.

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

31

Chapter 5: Hazardous Location Installation and Certication

• Hazardous Location and Non-Incendive Wiring Diagram

32

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• CSA Certicate of Compliance

Issued by:

Certificate of Compliance

Certificate: 2397437 (237484) Master Contract: 237484
Project: 70022593 Date Issued: 2016-04-22
Issued to: Automation Products Group Inc

1025 West 1700 North
Logan, Utah 84321
USA

Attention: Karl Reid

The products listed below are eligible to bear the CSA Mark shown

with adjacent indicators 'C' and 'US' for Canada and US or with adjacent

indicator 'US' for US only or without either indicator for Canada only.

Ravindra
(Ravi) Kanthe

Ravindra (Ravi)
Kanthe

PRODUCTS
CLASS - C225802 - PROCESS CONTROL EQUIPMENT-For Hazardous Locations­CLASS - C225882 - PROCESS CONTROL EQUIPMENT-For Hazardous Locations - Certified to US
Standards

Class I, Division 1 & 2, Groups C and D

Ex d IIB
Ex nA IIB
Class I, Zone 1; AEx d IIB
Class I, Zone 2; AEx nA IIB

x Float Level Sensors, Model MPX- E, R, G &T (MPX- abc-de-fghi-jjj), rated 12 - 24 Vdc, 80mA, or

rated 12 to 24 Vdc, 4-20mA; operating ambient Ta is 85°C; Temperature Code T4; Ingress protection
IP65; Field wiring is non-incendive when installed per drawing 9003468.

Class I, Division 2, Groups C and D
Ex nA IIB
Class I, Zone 2; AEx nA IIB

DQD 507 Rev. 2012-05-22 Page 1

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

33

Certificate:

2397437

Project:

General Requirements – Canadian Electrical Code, Part II
– Tenth Edition

CSA C22.2 No 30-M1986
(Reaffirmed 2007)

Explosion-Proof Enclosures for Use in Class I Hazardous
Locations Industrial Products – Third Edition

CSA C22.2 No 142-M1987
(Reaffirmed 2014)

Process Control Equipment Industrial Products – Third
Edition

Non-incendive Electrical Equipment for Use in Class I,

Edition

Electrical apparatus for explosive gas atmospheres – Part
0: General requirements – First Edit ion

Electrical apparatus for explosive gas atmospheres – Part
1: Flameproof enclosures "d" – First Edition

CSA E60079-15-02
(Reaffirmed 2006)

Electrical Apparatus for Explosive Gas Atmospheres –
Part 15: Type of Protection "n" – Second Edition

Industrial Control Equipment - Seventeenth Edition;

2010

Explosion-Proof and Dust-Ignition-Proof Electrical

Including October 28, 2009

Nonincendive Electrical Equipment for Use in Class I and

(Classified) Locations

Explosive atmospheres - Part 0 Equipment - General
requirements

70022593

Master Contract: 237484

Date Issued: 2016-04-22

x Float Level Sensors, Model MPX- F (model MPX- abc-de-fghi-jjj), rated 12 - 24 Vdc, 80mA, or rated

12 to 24 Vdc, 4-20mA; operating ambient Ta is 85°C; Temperature Code T4; Ingress protection IP65;
Field wiring is non-incendive when installed per drawing 9003468

Notes for all equipment:

1. The model code breakdown is as follows: a= E, R, F, G or T; b= 1, 2, 3 or 4; c= A,B or C, d= A, B, C, D, E,
F, G, Z, X, V, T, R, M, or J; e= N, B, D, Y, W, U, S, P, L, K, or I; f= F, R, P, S, N, or O; g= 1, 1.5, 2, 2.5, 3,

3.5, 4, 5, 6; h=W or S; i= A, B, C or D; and j= 12–153 for the 1/2" stem Type E or 48–300 for the 1" stem
Type R, Type G and Type T or 120-456 for Flex stem Type F.

2. The equipment is intended to be installed as required by the applicable electrical code (CEC, NEC) and as
specified by the manufacturers Installation Instructions.

3. The installation will be inspected by the authority with jurisdiction in the area where installed.

APPLICABLE REQUIREMENTS

CSA C22.2 No 0-10

CSA C22.2 No 213-M1987
(Reaffirmed 2008)

Division 2 Hazardous Locations Industrial Products – First

CSA C22.2 No 60079-0-07

CSA C22.2 No 60079-1-07

UL 508

UL 1203

ANSI/ISA-12.12.01-2007

UL 60079-0 - 5th Ed (Dec 2009)

DQD 507 Rev. 2012-05-22 Page 2

34

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Reprint with Revisions Through and Including April 15,

Equipment for Use in Hazardous (Classified) Locations ­Fourth Edition; Reprint with Revisions through and

II, Division 2 and Class III, Divisions 1 and 2 Hazardous

Certificate:

2397437

Project:

Explosive atmospheres - Part 1 Equipment Protection by

Flameproof Enclosures “d”

Electrical Apparatus for Explosive Gas Atmospheres - Part
15 - Electrical Apparatus with Type of Protection n

70022593

Master Contract: 237484

Date Issued: 2016-04-22

UL 60079-1 - 6th Ed (Apr 2009)

UL 60079-15 - 3rd Ed (Oct 2009)

MARKINGS

Please refer to Descriptive report for markings and Instructional material.

DQD 507 Rev. 2012-05-22 Page 3

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

35

Supplement to Certificate of Compliance

Project

Date

Description

70022593

2016

Update to Report 2397437 to include 3 new Probe types MPX
(for Class 1, Div. 1 & 2 and Zones 1 & 2) and MPX
and Zone 2), new PCB design, and update product label material and printing
method.

2440956

2011

Update to report 2397437 to correct misspellings and add note in Factory
Tests section of report.

2397437

2011-05-18

Original certification for the model MPX-ab-cd-efg-hhh float level sensors.

Certificate: 2397437 (237484) Master Contract: 237484

The products listed, including the latest revision described below,

are eligible to be marked in accordance with the referenced Certificate.

Product Certification History

-04-22

-07-19

-G, MPX-T

-F (for Class 1, Div. 2

DQD 507 Rev. 2012-05-22 Page 1

36

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Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

37

APG

R

Tel: [phone] • Fax: [phone] • www.apgsensors.com • [e-mail]

Automation Products Group, Inc.