APG MPX-F Operating Manual

APG

MPX Magnetostrictive Level Sensors

User Manual

For The MPX-F

R

Doc #9004829

Rev B, 03/2017

Table of Contents

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

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

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

Dimensions ....................................................................................................................................1-2

Specications ...................................................................................................................................3

Model Number Congurator .......................................................................................................... 4

Electrical Connections and System Wiring Diagrams ........................................................ 5-6

Chapter 2: Installation and Removal Procedures and Notes ..............................7

Tools Needed .....................................................................................................................................7

Physical Installation Notes ...........................................................................................................7

Physical Installation Instructions ............................................................................................... 8

Electrical Installation .....................................................................................................................9

Removal Instructions .....................................................................................................................9

Chapter 3: Programming ..........................................................................................10

Modbus Programming .................................................................................................................. 10

Modbus Programming with RST-6001 and APG Modbus Software .................................... 10

4-20 mA Programming with RST-4100 and APG Modbus Software ..................................... 11

Modbus Register Lists for MPX-F4 ....................................................................................... 11-12

MPX-F4 Modbus Sensor Parameters .................................................................................... 13-17

APG Modbus Register Lists for MPX-F2 and MPX-F3 ....................................................... 17-18

MPX-F2 and MPX-F3 APG Modbus Sensor Parameters ...................................................19-23

MPX-F Modbus Application Type Parameters .................................................................. 24-28

Chapter 4: Maintenance ...........................................................................................29

General Care .................................................................................................................................... 29

Repair and Returns ........................................................................................................................29

Chapter 5: Hazardous Location Installation and Certication .........................30

Hazardous Location and Non-Incendive Wiring Diagram .................................................... 30

CSA Certicate of Compliance ...............................................................................................31-34

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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 sensors provide highly accurate and repeatable level readings in a wide variety of liquid level

measurement applications. The MPX-F is certied for installation in hazardous areas in the US and Canada

by CSA for Class I, Division 2 and Class I, Zone 2 environments. The MPX-F’s exible stainless steel stem

allows for accurate measurements in environments that are not straight-forward.

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.

Electrical ratings

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

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

C

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

US

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

(Hazardous Installation and Non-Incendive Wiring Drawing) on page 30 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-F Sensor Dimensions

OPENINGS

COND UIT

HOUSING

HOUSING

ADAPTER

[110mm]

4.34"

[179mm]

7.03"

THRU

TOP DEADBAND

[254mm]

10.0"

[126mm]

2x 3/4" NPT

2x ø2.76"

GROUND

SCREW

MOUNTING OPTION FLOAT( S)

4.98"

[110mm]

4.34"

MEASURABLE LENGTH (PER ORDER)

TOTAL LENGTH

MPX-F STEM

ASSEMBLY

FLOAT

STOP

BOT DEADBAND

[152mm]

6.0"

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1

MPX-F Floats

Float Options

5.90”

5.00”

U & V

3.03”

W & X

5.10”

Float Ref.
S1=10.63”
S2=6”

Float Ref.
S1=12.25”
S2=4.25”

S & T

2.80”

Float Ref.
S1=12.25”
S2=4.25”

3.07”

Y & Z / P & R / L & M

Float
Ref.

5.50”

3.08”

2.80”

2.00”

S1=10”
S2=6.5”

Y & Z
P & R
L & M

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• Specications

Performance

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

Environmental

Operating Temperature -40° to 185° F (-40° to 85° C)
Enclosure Protection NEMA 4X, IP65

Electrical

Supply Voltage 12-24 VDC on sensor
Current Draw Modbus (RS-485): 28 mA

4-20 mA: 22 mA single / 44 mA dual (Max)

Materials of Construction

Housing Cast aluminum, epoxy coated
Stem 7/8” ø 316L SS Flexible Tubing with Braid

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

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• Model Number Congurator

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

A. Stem Type

□ F 7/8 in. diameter Flexible Tubing with Braid, 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 RTDs default to 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. 120 in. - Max. 384 in.

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

M. Weights

□ W1 5lb weight, Standard for MPX-F 12 ft or shorter
□ W2 10lb weight, Standard for MPX-F longer than 12 ft

N. Temperature Sensor Options

MPX-F4

□ T__ Specify location of stem RTD in inches from bottom of

probe (6” is standard location)

□ 1T_ Digital Temperature Sensor A (no RTD) and location

from bottom of probe in inches

□ 2T_ Digital Temperature Sensors A (no RTD), B and loca-

tions from bottom of probe in inches

□ 3T_ Digital Temperature Sensors A (no RTD), B, C and loca-

tions from bottom of probe in inches

□ 4T_ Digital Temperature Sensors A (no RTD), B, C, D and

locations from bottom of probe in inches

□ 5T_ Digital Temperature Sensors A (no RTD), B, C, D, E and

locations from bottom of probe in inches

N. 4-20 Output Set Points

MPX-F2/F3

□ 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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• Electrical Connections and System Wiring Diagrams

Modbus System Wiring For MPX-F4 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-F4
series sensor

Sensor 1

V+

B
A

GND

EARTH

GND

MPX-F4
series sensor

Sensor 2

V+

B
A

GND

EARTH

GND

Modbus System Wiring with RST-6001 For MPX-F4 Sensors

Power
Supply

+12-24 Vdc

GND

Use Shielded Cable

MPX-F4
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-F4
series sensor

Sensor 1

V+

B
A

GND

EARTH

GND

MPX-F4
series sensor

Sensor 2

V+

B
A

GND

EARTH

GND

MPX-F4
series sensor

Sensor 3

V+

B
A

GND

EARTH

GND

diagram.

 IMPORTANT: For lightning and surge protection on an MPX-F4, either connect the

grounding screw (see page 1) to an earth ground, or ensure that tank mounting of the
MPX-F4 is grounded.

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120 Ω

terminating
resistor at
last sensor

5

4-20 mA Loop Wiring

4-20 mA Dual Float Loop Wiring

4-20 mA Single Float Loop Wiring

(MPX-F2 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-F3 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-F2 or
MPX-F3 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-F2 and MPX-F3
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-F3 series sensors,

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

6

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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

• 1/8” Hex Allen wrench for screws on oat stop(s).

• Pliers for bending cotter pin.

• Physical Installation Notes

The MPX-T 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)

• 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.

• 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-F oats are installed by custom-
er.

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7

Taper

 IMPORTANT: Floats must be oriented

properly on the stem, or sensor readings
will be inaccurate and unreliable. Untapered

UP

Figure 2.1

oats will have a sticker indicating the top of
the oat. Remove sticker prior to use.

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

(Hazardous Installation and Non-Incendive Wiring Drawing) on page 30 to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.

• Physical Installation Instructions

Ensure that all components have been received, including:

• MPX-F sensor head and stem

• Float (or oats, if two oats purchased)

• Optional Slide Mount

• Weight, Clevis Pin, and Cotter Pin

• Assembly drawing

Assemble sensor mounting, oat(s), weight and pins at installation location, if possible.

• Slide mounting option onto stem. Loosen compression cap so it will slide easily on stem.

• Note: If the oats do not t through the tank/vessel mounting hole, mount them on the stem from

inside the vessel being monitored. Then secure the sensor to the vessel.

• Slide oats onto stem. If using two oats, slide the lighter oat on rst. Tops of oats will be indicated
by sticker. After ensure top of oat is toward MPX-F sensor head, remove sticker.

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

installation locations.

• Insert weight on end of stem. Hold in place with clevis pin.

• Insert cotter pin in clevis pin. Bend ends of cotter pin back to lock pins into place.

Install MPX-F sensor on tank

• When lifting and installing the sensor be sure to minimize the bending angle between the rigid stem at

the top and bottom of the sensor and the exible stem in-between. Sharp bends at those points could

damage the sensor.

• If your sensor’s stem and oats t through the mounting hole, insert the weight and the oats into the

mount opening.

• Carefully unroll and feed the MPX-F sensor stem into the tank. Slide the mount up to the top of the
stem.

• When the weight is on the bottom of the tank, secure the mounting option to the vessel.

• Take any slack out of the exible stem. Tighten the compression tting to hold stem in place.

8

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