APG MPI-F Operating Manual

APG

MPI Magnetostrictive Level Sensors

User Manual

For the Series MPI-F

Flexible Stem, Intrinsically Safe Probe

Doc #9005623

R

Part #200337

Rev A, 12/2019

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

System Wiring Diagrams and IS Use Case Diagrams .......................................................... 5-6

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

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

ATEX Stated Conditions of Use .....................................................................................................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

Modbus Register Lists for MPI-F .......................................................................................... 10-11

MPI-F Modbus Sensor Parameters ....................................................................................... 12-16

MPI-F Modbus Application Type Parameters .................................................................... 17-21

Chapter 4: Maintenance ...........................................................................................22

General Care .................................................................................................................................... 22

Repair and Returns ........................................................................................................................22

Chapter 5: Hazardous Location Installation and Certication .........................23

Intrinsically Safe Installation Drawing for Hazardous Locations ......................................23

CSA Certicate of Compliance .............................................................................................. 24-26

IECEx Certicate of Conformity ...........................................................................................27-29

EU Declaration of Conformity .....................................................................................................30

ii

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Introduction

237484

Thank you for purchasing an MPI series magnetostrictive level sensor from APG. We appreciate your
business and your trust. Please take a few minutes to familiarize yourself with your MPI and this manual.

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

measurement applications. The MPI-F is certied intrinsically safe for installation in hazardous areas by
CSA, ATEX, and IECEx for Class I, Division 1 and Class I, Zones 0 environments. The MPI-F’s exible stainless

steel stem allows for easier installation in extra tall tanks.

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.

8-24 VDC, Imax = 280 mA

Class I, Division 1, Groups C, D, T4; IP65
Class I, Zone 0, Ex/AEX ia, IIB, T4, Ga
Ex ia IIB, T4 ,Ga
(Ta = -40°C to 85°C)

C

US

Intrinsically Safe Wiring Requirements:
U

ATEX Certicate Number: Sira 19ATEX2072X

II 1G
Ex ia IIB T4 Ga
Ta: -40°C to 85°C

U

IECEx SIR 19.0026X

Ex ia IIB T4 Ga
Ta: -40°C to 85°C

= 28 V, Ii = 280 mA, Pi = 0.850 W, L

i

= 28 VDC, Ii = 280 mA, Pi = 0.850 W , Li = 3.50 μH, Ci = 0.374 μF

i

= 3.50 μH, Ci = 0.374 μF

i

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iii

 IMPORTANT: MPI-F level sensor MUST be installed according to drawing 9009451

(Intrinsically Safe Installation Drawing for Hazardous Locations) on page 23 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 -- COUPER LE COURANT AVANT D’ENLEVER LE COUVERCLE, ou GARDER LE COUVERCLE
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.

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.

iv

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Chapter 1: Specications and Options

• Dimensions

MPI-F Sensor Dimensions

CONDUIT

OPENING

HOUSING

[110mm]

4.34"

[145mm]

5.71"

[126mm]

3/4" NPT

4.98"

[110mm]

4.34"

HOUSING

ADAPTER

[125mm]

[48mm]

[254mm]

10.0"

MEASURABLE LENGTH (PER ORDER)

[173.8mm - 177.0mm]

4.94"

1.90"

6.84" - 6.97"

2x Ø2.76"

THRU

GROUND

SCREW

TOP DEADBAND

MOUNTING OPTION FLOAT(S)

TOTAL LENGTH

Housing Connection

Location

MPI-F STEM

ASSEMBLY

FLOAT

STOP

BOT DEADBAND

[152mm]

6.0"

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1

MPI-F Floats

Float Options

I & J U & V

5.88”4.98”

W & X

5.00”

U & V / I & J

3.03”

3.00”

Float Ref.
S1=12.25”
S2=4.25”

5.10”

Float Ref.
S1=10.63”
S2=6”

U & V
I & J

S & T

2.80”

3.07”

Y & Z / L & M

5.50”

3.08”

2.00”

Float Ref.
S1=12.25”
S2=4.25”

Float
Ref.
S1=10”
S2=6.5”

Y & Z
L & M

2

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• Specications

Performance

Resolution 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 8-24 VDC on sensor
Typical Current Draw 25 mA
Protection Reverse Polarity and Surge (per IEC 61000-4-5, 4-6, 4-7)

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)

Programming

RS-485 Optional RST-6001 USB-to-RS-485 converter

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3

• Model Number Congurator

Model Number: MPI - _F_ __5__ _____ - _____ _____ - _____ _____ _____ __B__ - _____ - _____ - _____
A B C D E F G H I J K L

A. Stem Type

□ F 7/8 in. diameter Flexible Tubing with Braid, 316L SS

B. Output

□ 5 Modbus RTU, with surge protection, Intrinsically Safe

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)
□ M 5.5h x 2d in. Red Polyurethane (0.57 SG)
□ L 5.5h x 2d in. Blue Polyurethane (0.94 SG)
□ J 5h x 3d in. Oval Titanium 2 (0.60 SG)
□ I 5h x 3d in. Oval Titanium 2 (0.92 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)
□ L 5.5h x 2d in. Blue Polyurethane (0.94 SG)
□ I 5h x 3d in. Oval Titanium 2 (0.92 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

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. 300 in.

K. Temperature Sensor Options

□ N None

▲

□ 1D

Digital Temperature Sensor A, 12 in. from bottom of

probe

□ 2D Digital Temperature Sensors A, B
□ 3D Digital Temperature Sensors A, B, C
□ 4D Digital Temperature Sensors A, B, C, D
□ 5D Digital Temperature Sensors A, B, C, D, E
□ 6D Digital Temperature Sensors A, B, C, D, E, F
□ 7D Digital Temperature Sensors A, B, C, D, E, F, G

Note: Temperature sensors B - G are spaced evenly between

A and probe’s zero reference, with minimum of 2 in.
required between temperature sensors.

L. Housing Connection

▲

□ N

None

□ A 3/4” to 1/2” NPT Reducing Threads
□ B Cable Gland (Cable sold separately)
□ M 4-pin M12 Micro Connector Male
□ F 4-pin M12 Micro Connector Female

Note: ▲This option is standard.

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• System Wiring Diagrams and IS Use Case Diagrams

Modbus System Wiring For MPI-F Sensors

Power
Supply

Master

Device

120 Ω terminating resistor
may be necessary for long

+8-24 Vdc

GND

RS-485 A (TX+)

RS-485 B (TX-)

Use Shielded Cable

See Hazardous Installation

Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.

See Hazardous Installation
Drawing for Intrinsically Safe

installation requirements.
Otherwise, wire directly.

cable runs.

Note: When connecting MPI
sensors to your system, reversing
A and B connections may be necessary
if sensors do not communicate with
Modbus Master device.

MPI Sensor MPI Sensor MPI Sensor

Sensor 1

V+

B (TX-)

A (TX+)

GND

Sensor 2

V+

B (TX-)

A (TX+)

GND

Modbus System Wiring with RST-6001 For MPI-F Sensors

Power
Supply

+8-24 Vdc

GND

Use Shielded Cable

Wiring T’s must be located on
controller/supply side of IS barriers.

See Hazardous Installation
Drawing for Intrinsically Safe

installation requirements.
Otherwise, wire directly.

Sensor 3

V+

B (TX-)

A (TX+)

GND

120 Ω terminating resistor across A & B

terminals of last or only sensor, if necessary.

For installations without IS barriers only.

Wiring T’s must be located on
controller/supply side of IS barriers.

RST-6001

Modbus

Controller

USB to computer
with APG Modbus
software

Note: An independent +8-24 Vdc
power supply is required when using
an RST-6001 Modbus Controller. The
RST-6001 can only supply ±5 Vdc, not
the +8-24 Vdc required by the MPI.



IMPORTANT: Refer to Chapter 5 for Intrinsically Safe Installation Drawing for Hazard-

ous Locations.

A
B

-5V

+5V

Equivalent 120 Ω

terminating resistor
internal to RST-6001

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See Hazardous Installation
Drawing for Intrinsically Safe

installation requirements.
Otherwise, wire directly.

MPI sensor

Sensor 1

V+

B
A

GND

See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.

MPI sensor MPI sensor

Sensor 2

V+

B
A

GND

See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.

Sensor 3

V+

B
A

GND

120 Ω terminating resistor across A & B

terminals of last or only sensor, if necessary.

For installations without IS barriers only.

5

MPI - MDI Use Case Diagram

Hazardous Area

Zone 1

MDI
Modbus Address: Master
Controling: Sensor 1

Zone 0 or Zone 1

MPI Sensor
Modbus Address: 1

Single MDI controlling a single MPI sensor

• MDI is located in Zone 1 area. MPI can be in Zone 0 or Zone 1 without additional barriers.

• MDI is battery powered; allows for software-based switchable power for MPI.

• MPI is powered by MDI battery.

• No external controller.

• No IS barrier required.

• Any changes to MPI settings done via MDI buttons.

MPI - MDI with Passive Controller Use Case Diagram

Hazardous AreaNon-hazardous Area

Zone 1

MDI
Modbus Address: Master
Controling: Sensor 1

Zone 0 or Zone 1

Passive Control Equipment

Modbus: Sniffer

Approved
IS Barrier

Sniffing: MDI

Single MDI controlling a single MPI sensor with Passive Control Equipment

• MDI is located in Zone 1 area. MPI can be in Zone 0 or Zone 1 without additional barriers.

• MDI is battery powered; allows for software-based switchable power for sensor.

• MPI is powered by MDI battery.

• External controller passively reads (Snis) readings from MDI.

• External controller can activate MDI.

• Approved IS Barrier required between Passive Control Equipment and MDI.

• Auxiliary connection required for MDI.

• Any changes to MPI settings done via MDI buttons.

MPI Sensor
Modbus Address: 1

6

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Chapter 2: Installation and Removal Procedures and Notes

• Tools Needed

You will need the following tools to install your MPI level sensor:

• Wrench sized appropriately for MPI 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.

• ATEX Stated Conditions of Use

• Under certain extreme circumstances, the non-metalic parts incorporated in the enclosure of this
equipment may generate an ignition-capable level of electrostatic charge. Therefore the equipment
shall not be installed in a location where the external conditions are conducive to the build-up of
electrostatic charge on such surfaces. In addition, the equipment shall only be cleaned with a damp
cloth.

• The enclosure is manufactured from Aluminum. In rare cases, ignition sources due to impact and
friction sparks could occur. This shall be considered during installation.

• Physical Installation Notes

The MPI-F 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). MPI-F oats are installed by customer.

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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: MPI-F level sensor MUST be installed according to drawing 9009451

(Intrinsically Safe Installation Drawing for Hazardous Locations) on page 23 to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.

• Physical Installation Instructions

Ensure that all components have been received, including:

• MPI-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 MPI-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 MPI-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 MPI-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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• Electrical Installation

• Remove the housing cover of your MPI.

• Feed system wires into MPI through 3/4” NPT conduit openings. Any ttings used must be UL/CSA
Listed for CSA installation.

• Connect wires to MPI terminals. Use crimped ferrules on wires, if possible.

• Replace the housing cover.

See System Wiring Diagrams and IS Use Case Diagrams (pages 5-6) for Modbus wiring examples.

• Removal Instructions

Removing your MPI 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 ac-

cess 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.

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9

Chapter 3: Programming

• Modbus Programming

MPI-F 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 MPI-F Modbus Register Lists on pages 10 and 11.

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

• Modbus Programming with RST-6001 and APG Modbus Software

An APG RST-6001 Modbus Controller can be used in tandem with APG Modbus software to program and
control up to 20 MPI-F 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 MPI-F Modbus Register Lists on pages 10 and 11.

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

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

• Modbus Register Lists for MPI-F

Input Registers (0x04)

Register Returned Data

30299 Model Type

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
30308 API 18.2 TEMP (in 0C, signed)

 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.

10

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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 32,768 mm
40406 Full Distance 0 to 32,768 mm
40407 Empty Distance 0 to 32,768 mm
40408 †Sensitivity 0 to 100
40409 †Pulses 5 to 20
40410 †Blanking 0 to 10,364 mm

40411 NA NA

40412 †Averaging 1 to 50
40413 †Filter Window 0 to 10,364 mm
40414 †Out of Range Samples 1 to 255
40415 †Sample Rate 50 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) NA*
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
40446 Baud Rate 0, 1, 2, 3, 4
40201 Restore to Factory Defaults 1

*These registers are not used by the MPI-F, even though they are labeled in the APG Modbus software.
†Setting is factory calibrated. Do not adjust.

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11

• MPI-F 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 MPI-F Modbus Application Type Parameters pages 17-21.

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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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 detect­ed.

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.

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13

40413 - Filter Window (Factory Calibrated)

Example:

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

Min. Reading Max. Reading

Current value

of Distance

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 50 - 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.

14

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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 MPI 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 MPI at start up. If the Noise
Limit is reached before four readings register within the Pre lter window, the MPI 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.

MPI-F sensors can accomodate up to seven digital temperature sensors in the stem.

0 = Average of sensors A - G
1 = Digital Temperature Sensor A 5 = Digital Temperature Sensor E
2 = Digital Temperature Sensor B 6 = Digital Temperature Sensor F
3 = Digital Temperature Sensor C 7 = Digital Temperature Sensor G

4 = Digital Temperature Sensor D 8 = N/A

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15

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).

40446 - Baud Rate

Selects the communication speed between the sensor and the Master Device. All devices on the network
must use the same Baud Rate.

APG Modbus Master and Slave devices default to 9600 Baud.

0 = 9600

1 = 19200
2 = 38400
3 = 57600
4 = 115200

40201 - Restore To Factory Defaults

Writing a 1 to this Holding Register will erase any settings changes and restore the factory default settings.

16

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Bottom
Radius

• MPI-F 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
40405 Max Distance (factory set)
40406 Full Distance 0 - 32,768 mm
40407 Empty Distance 0 - 32,768 mm

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 mm

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

40438-40439 Radius of Bottom Hemisphere 0 - 1,000,000 (mm)

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Full

Level

or

Diameter

17

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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 - 32,768 mm
40407 Empty Distance 0 - 32,768 mm

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)

Full

Level

or

Full

Level

Tank X

Chute
Length

Chute X

Diameter

Cone

Diameter

Chute Y

Cone

Length

Tank Y

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

Max Distance.

18

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Application 5 - Volume of Horizontal Cylindrical Tank ± Hemispherical Ends

Level

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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)

Diameter

End
Radius

Length

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 mm

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

Full

Full

Level

Diameter

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19

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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)

20

Full

Level

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Width

Depth

Length

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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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 - 32,768 mm
40407 Empty Distance 0 - 32,768 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

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21

Chapter 4: Maintenance

• General Care

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

• Periodically inspect your MPI 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

Should your MPI 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 MPI level sensor must be made by the

factory. Modifying, disassembling, or altering the MPI on site is strictly prohibited.

22

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Chapter 5: Hazardous Location Installation and Certication

• Intrinsically Safe Installation Drawing for Hazardous Locations

VERON TNEMUCODON TRAPEDOC EGAC

A

11

APPROVEDDATECHANGE ORDERDESCRIPTIONREVZONE

888.525.7300

Logan, Utah USA

1025 West 1700 North

MPI Series

9005491VARIOUS

SHEET OF

for Hazardous Locations

Intrinsically Safe Installation Drawing

CO-3441 retsedihC .C8102/92/8.esaeler laitinI-- A

Hazardous Location

REVISIONS

Class I, Division 1, Groups C,D T4

Unclassified Location

Class I, Zone 0, AEx ia IIB T4 Ga

Ex ia IIB T4 Ga, Ta -40°C to 85°C

MPI

Pi = 850mW

Li = 3.50uH

Vmax (or Ui) = 28V

Imax (or Ii) = 280mA

Ci = 0.374uF

6/5/2018

8/29/2018

8/29/2018

V+

RS-485 A

Associated Apparatus

with Entity Parameters

V- (GND)

RS-485 B

R. Barson

S. Hutchins

C. Chidester

APPROVALS DATE

- Installation must be in accordance with NEC Articles 504 and 505.

Po ≤ Pi

Ca (or Co) ≥ Ci + Ccable

Isc (or Io) ≤ Imax (or Ii)

La (or Lo) ≥ Li + Lcable

Voc (or Uo) ≤ Vmax (or Ui)

APVD

CHKD

DRWN

52797

A

SIZE

FINISH

MATL

CONTRACT

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

IF LOANED, IT IS SUBJECT TO RETURN

UPON DEMAND AND MAY NOT BE USED

DETRIMENTAL TO THE COMPANY.

IN ANY WAY DIRECTLY OR INDIRECTLY

LOGAN, UTAH AND MAY NOT BE

AUTOMATION PRODUCTS GROUP, INC.

DISCLOSED TO OTHERS WITHOUT

USED, REPRODUCED, PUBLISHED, OR

WRITTEN CONSENT OF THE COMPANY.

PROPRIETARY AND CONFIDENTIAL

THIS DRAWING IS THE PROPERTY OF

23

• CSA Certicate of Compliance

Certificate of Compliance

Certificate: 70219727 Master Contract: 237484
Project: 70219727 Date Issued: 2019-03-26
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.

Issued by:

PRODUCTS
CLASS - C225804 - PROCESS CONTROL EQUIPMENT-Intrinsically Safe, Entity - For Hazardous
Locations­CLASS - C225884 - PROCESS CONTROL EQUIPMENT - Intrinsically Safe, Entity-- For Hazardous
Locations - Certified to US Standards

Class I, Division 1, Groups C, D, T4; IP 65*

Class I, Zone 0, Ex/AEx ia, IIB, T4, Ga
Ex ia IIB, T4, Ga

MPI Vibration Sensors, rated 8-24 VDC, Imax = 280 mA; Tamb = -40°C to +85°C, Intrinsically Safe when

installed per drawing 9005491

Entity Parameters: Ui= 28V, Ii= 280mA, Pi=0.850W, Li=

*IP 65 is only for STEM Type E, G, R, F and T.

The MPI series utilizes a configurator style model coding system as defined below:
MPI-ABC-DE-FGHI-J-K-LMNO-PQ

3.50H, Ci=0.374F

Jigneshkumar Dabhi
Jigneshkumar Dabhi

24

DQD 507 Rev. 2018-11-12 Page 1

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Certificate:
Project:

1. Under certain extreme circumstances, the non-metallic parts incorporated in the enclosure

capable level of electrostatic charge.

2. T he enclosure is manufactured from Aluminum. In rare cases, ignition sources due to

Standard

Description

C22.2 No. 60079-0:2019

Explosive atmospheres – Part 0: Equipment – General
requirements

C22.2 No. 60079-11:2014

Explosive atmospheres — Part 11: Equipment protection by
intrinsic safety “i”

C22.2 No. 61010-1-12

Safety Requirements for electrical equipment for measurement,
control, and laboratory use – Part 1: General requirements

UL 61010-1:2012

UL Standard for Safety Electrical Equipment For Measurement,

Ed.

UL 60079-0: 2013

Standard for Safety – Explosive Atmospheres – Part 0: Equipment
– General Requirements, Ed. 6

70219727

70219727

Master Contract: 237484

Date Issued: 2019-03-26

Conditions of Acceptability:

of this equipment may generate an ignition­Therefore the equipment shall not be installed in a location where the external conditions
are conducive to the build-up of electrostatic charge on such surfaces. In addition, the
equipment shall only be cleaned with a damp cloth.

impact and friction sparks could occur. This shall be considered during installation.

3. IP 65 is not a part of the hazardous location ratings and is tested separately.

APPLICABLE REQUIREMENTS

Control, and Laboratory Use; Part 1: General Requirements, 3rd.

DQD 507 Rev. 2018-11-12 Page 2

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25

Certificate:
Project:

UL 60079-11:2014

Standard for Safety – Explosive Atmospheres – Part 11:

70219727

70219727

Master Contract: 237484

Date Issued: 2019-03-26

Equipment Protection by Intrinsic Safety “I”, Ed. 6

MARKINGS

The manufacturer is required to apply the following markings:

 Products shall be marked with the markings specified by the particular product standard.
 Products certified for Canada shall have all Caution and Warning markings in both English and French.

Additional bilingual markings not covered by the product standard(s) may be required by the Authorities Having
Jurisdiction. It is the responsibility of the manufacturer to provide and apply these additional markings, where
applicable, in accordance with the requirements of those authorities.

The products listed are eligible to bear the CSA Mark shown with adjacent indicators 'C' and 'US' for Canada and
US (indicating that products have been manufactured to the requirements of both Canadian and U.S. Standards) or
with adjacent indicator 'US' for US only or without either indicator for Canada only.

1. Manufacturer’s name or registered trade mark;

2. Model Number as in the PRODUCTS section, above;

3. Serial number S/N XXXXXX;

4. “Install per document 9005491”

5. Ambient Temperature Rating: as specified in the PRODUCTS section above;

6. DC Power Symbol as per Table 1, IEC 61010-1:

7. Hazardous Location Designation: As specified in PRODUCTS section above;

8. IP 65 (Only for STEM Type Type E, G, R, F and T).

9. Certificate number: CSA19CA70219727

Nameplate adhesive label material approval information:

1. The following markings are provided on a UL Recognized adhesive nameplate (also used

previously on CSA certificate 2397437) manufactured by Zebra Technologies International, LLC,
Material: Z-Ultimate 4000T, printed with a resin ribbon manufactured by

Zebra Technologies

International LLC, Material: 5100 Premium Resin Ribbon, at a maximum service temperature of
135°C or higher.

DQD 507 Rev. 2018-11-12 Page 3

26

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• IECEx Certicate of Conformity

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27

28

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29

• EU Declaration of Conformity

30

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31

APG

R

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Automation Products Group, Inc.