APG MPI-T Magnetostrictive Level Sensors User Manual

Tools Needed
Ensure you have the necessary tools for installation, including wrenches and screwdrivers.
Physical Installation Instructions
Follow the provided drawing (9005491) for hazardous locations to ensure proper installation.

Electrical Installation
Adhere to the Intrinsically Safe Wiring Requirements: Ui=28 VDC, Ii=280 mA, Pi=0.850 W, Li=3.50 H, Ci=0.374 F.
Removal Instructions
Before removing the cover, ensure the circuit is open to prevent accidents.

Programming

Modbus Programming
Refer to the provided Modbus Register Lists for configuring the MPI-T sensor parameters.

Maintenance

General Care
Regularly inspect and clean the sensor to ensure proper functioning.

Repair and Returns
If repairs are needed, contact Technical Support for a Return Material Authorization before sending the product back.

Hazardous Location Installation and Certification
Follow the provided Intrinsically Safe Installation Drawing for Hazardous Locations to ensure safety certifications are maintained.

Frequently Asked Questions (FAQ)

Q: What is the warranty period for the MPI-T sensor?
A: The MPI-T sensor is covered by a 24-month warranty against defects in material and workmanship.

Q: What are the Intrinsically Safe Wiring Requirements for the MPI-T sensor?
A: The Intrinsically Safe Wiring Requirements include Ui=28 VDC, Ii=280 mA, Pi=0.850 W, Li=3.50 H, Ci=0.374 F.

INTRODUCTION

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 series magnetostrictive level sensor provides highly accurate and repeatable level readings in a wide variety of liquid-level measurement applications. It is certified for installation in Class I, Division 1, and Class I, Zones 0 hazardous areas in the US and Canada by CSA, and ATEX and IECEx for Europe and the rest of the world. The MPI-T’s large, buoyant, and robust floats allow it to be used in harsh applications where fouling or buildup might otherwise be of concern. Additionally, the 1”
titanium stem provides compatibility with a wider range of corrosive media.

Reading your label

Every APG instrument comes with a label that includes the instrument’s model number, part number, and serial number. Please ensure that the part number on your label matches your order.
The following electrical ratings and approvals are also listed on the label. Please refer to the product page on APG’s website for relevant certificates.

IMPORTANT:
MPI-T level sensor MUST be installed according to drawing 9005491 (Intrinsically Safe Installation Drawing for Hazardous Locations) on page 22 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 INTRINSIC SAFETY;
AVERTISSEMENT — RISQUE D’EXPLOSION — LA SUBSTITION DE COMPOSANT PEUT AMELIORER LA SECURITE INTRINSIQUE.
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.
Warning: — The model MPI-T contains titanium over 7.5% for Group II and care needs to be taken to avoid ignition hazards due to impact or friction;
AVERTISSEMENT — Le modèle MPI-T contient plus de 7,5% de tetane pour le groupe II et des precautions doivent être prises pour eviter un risque d’inflammation due aux chocs ou aux frottements.
IMPORTANT: Only the combustion gas detection performance of the instrument has been tested.

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/resources/warranty-certifications/warranty-returns/. Contact Technical Support to receive a Return Material Authorization before shipping your product back.

SPECIFICATIONS AND OPTIONS

Dimensions

MPI-T Sensor and Float Dimensions

Specifications

Performance

Resolution 0.04 in. (1 mm)

Accuracy ±0.05% of Full Scale or 1 mm (whichever is larger)
Digital Temp Sensor Accuracy ±1°C

Environmental

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

Electrical

Supply Voltage 8-24 VDC on the 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 Titanium 2

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

MPI-T Model Number Configurator

Model Number:

A. Stem Type
- R 1 in. diameter, rigid
B. Output
- 5 Modbus RTU, with surge protection, Intrinsically Safe

C. Housing Type
All Housing Die-cast Aluminum, NEMA 4X, IP65, Blue
- __▲ Large Housing
- A Small Housing

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)
- 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)
- 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
- P▲ NPT Plug 150#
- N None
G. Mounting Size
- 2▲ 2 in.
- 3 3 in.
- N None
H. Mounting Connection
- S Slide with Compression Fitting (adjustable)
I. Stem Material
- T Titanium 2

J. Total Stem Length in Inches
- __ Min. 48 in. – Max. 300 in.
K. Temperature Sensor Options
- N None
- 1D▲ Digital Temperature Sensor A, 12 in. from the bottom of the 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 the probe’s zero reference.
L. Custom Housing-Electrical Connection†
- N▲ None
- B Cable Gland (Cable sold separately)
- C 4-pin M12 Micro Connector Female
- D 4-pin M12 Micro Connector Male – 90°
- F 4-pin M12 Micro Connector Female – 90°
- G 90° Elbow
- M 4-pin M12 Micro Connector Male
Note: ▲This option is standard.
Note: †Connectors available for use with Small Housing only. For Large Housing, choose N None.

System Wiring Diagrams and IS Use Case Diagrams

Modbus System Intrinsically Safe Wiring For MPI-T5 Sensors

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

Modbus System Intrinsically Safe Wiring with RST-6001 For MPI-T5 Sensors

IMPORTANT: Refer to Chapter 5 for Intrinsically Safe Installation Drawing for Hazardous Locations

MPI – MDI Use Case Diagram

Single MDI controlling a single MPI sensor

MDI is located in the 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 an MDI battery.

No external controller.
No IS barrier is required.
Any changes to MPI settings are done via MDI buttons.

MPI – MDI with Passive Controller Use Case Diagram

Single MDI controlling a single MPI sensor with Passive Control Equipment

MDI is located in the 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 the sensor.
MPI is powered by an MDI battery.

External controller passively reads (Sniffs) readings from MDI.
The external controller can activate MDI.
Approved IS Barrier required between Passive Control Equipment and MDI.

Auxiliary connection is required for MDI.
Any changes to MPI settings are done via MDI buttons.

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 fitting
1/8” Hex Allen wrench for screws on float stop(s).

Conditions of Use

Under certain extreme circumstances, the non-metallic 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 Aluminium. In rare cases, ignition sources due to impact and friction sparks could occur. This shall be considered during installation.
Model MPXI shall be installed as per drawing 9006113.

Unused entries of model MPXI shall be closed with blanking elements maintaining explosion-proof properties and ingress protection rating of the enclosure.
For information on the dimensions of the flameproof joints, the manufacturer shall be contacted.
For model MPXI only, the Stem Assembly shall not be subject to vibrations or exposed to chemicals that might adversely affect the partition wall.

Physical Installation Notes
The MPI-T should be installed in an area—indoors or outdoors—that 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 incompatible with Titanium Grade 2
No chemicals corrosive to stainless steel (such as NH3, SO2, Cl2, etc.) (Not applicable to plastic-type stem options)
Ample space for maintenance and inspection

Additional care must be taken to ensure:

The probe is located away from strong magnetic fields, such as those produced by motors, transformers, solenoid valves, etc.
The medium is free from metallic substances and other foreign matter.
No ignition hazards exist due to impact or friction with the titanium stem.
The probe is not exposed to excessive vibration.
The float(s) fit through the mounting hole. If the float(s) does/do not fit, it/they must be mounted on the stem from inside the vessel being monitored.
The float(s) is/are oriented properly on the stem (See Figure 2.1). MPI-T floats are typically installed by customers.

IMPORTANT:
Floats must be oriented properly on the stem, or sensor readings will be inaccurate and unreliable. Untapered floats will have a sticker or etching indicating the top of the float. Remove the sticker before use.

IMPORTANT:
MPI-T level sensor MUST be installed according to drawing 9005491 (Intrinsically Safe Installation Drawing for Hazardous Locations) on page 22, to meet listed approvals. The faulty installation will invalidate all safety approvals and ratings.

Physical Installation Instructions

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 flexible stem in between. Sharp bends at those points could damage the sensor. (Not applicable for non-flexible probe stems.)
If your sensor’s stem and floats fit through the mounting hole, carefully lower the assembly into the vessel, then secure the sensor’s mounting option to the vessel.
If the floats do not fit, mount them on the stem from inside the vessel being monitored. Then secure the sensor to the vessel.
For sensors with float stops, refer to the assembly drawing included with the sensor for float-stop installation locations.

Electrical Installation

Remove the housing cover of your MPI.
Feed system wires into MPI through conduit openings. Fittings must be UL/CSA Listed for CSA installation and IP65 Rated or better.
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 for Modbus wiring examples.

Removal Instructions
Removing your MPI level sensor from service should be done with care.

If the floats on your sensor fit through the mounting hole, carefully lift the entire sensor assembly out of and away from the vessel.
If the floats on your sensor do not fit 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 floats and stem for removal.
Clean the stem and floats 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.

PROGRAMMING

Modbus Programming
MPI-T series sensors use standard Modbus RTU protocol (RS-485). The sensors can only operate as client 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-T Modbus Register Lists.

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-T series sensors. Through APG Modbus, you can monitor the raw readings from the sensor, configure the data for distance, level, volume, or weight, and enter measurements for a strapping chart. See MPI-T Modbus Register Lists on pages 9 and 10.

NOTE:
For APG Modbus programming instructions, or to download APG Modbus software, please visit https://www.apgsensors.com/resources/product-resources/software-downloads/.

Modbus Register Lists for MPI-T
The registers listed below are reference addresses. To convert a reference address to an offset address, remove the first digit then subtract one.

Example 1: Reference address = 30300 → Offset register = 299
Example 2: Reference address = 40400 → Offset register = 399

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 °C, 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 °C, signed)

NOTE: The Calculated Readings will be returned without a decimal place. To obtain the true result, the Decimal Place setting must be taken into account.

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	†Offset	-10,364 to 10,364 mm
40418	†Pre filter	0 to 10,364 mm
40419	†Noise limit	0 to 255
40420	Temperature Select	0 to 8
40421	RTD Offset (°C)	NA*
40422	†Float Window	0 to 1,000 mm 0=1 float
40423	1st Float Offset	-10,364 to 10,364
40424	2nd Float Offset	-10,364 to 10,364
40425	†Gain Offset	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-T, even though they are labeled in the APG Modbus software.
The setting is factory-calibrated. Do not adjust.

MPI-T Modbus Sensor Parameters

40401 – Units
Determines the units of measure for the Calculated Reading when the 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-T Modbus Application Type Parameters.

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)

40405 – Maximum Distance (Factory Calibrated)
Sets the distance (beginning from the Zero Reference) to the point where the sensor will stop looking for float signals, usually the bottom of the stem. A float 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 float 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 first signal will be valid. Signals from a float in the blanking area will be ignored.
40412 – Averaging
Sets the number of qualified received float signals to average for the raw reading. Qualified received signals are placed in a first-in, first-out buffer, the contents of which are averaged for the raw reading. The larger the number of qualified 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
Determines the physical range (0 – 10,364 mm) of qualified 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 buffer (Holding Register 40414). See Figure 3.1.

Example:

Window = 300 mm
Out of Range Samples = 10

40414 – Out-of-Range Samples
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
Sets the update rate of the sensor (between 50 – 1000 ms). Shorter time delays allow for quicker sensor response times to changing levels. The 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.
40417 – Offset (Factory Calibrated)
Sets the Zero Reference of the sensor, the point from which the calculated distance is measured.
40418 – Pre-filter
- Defines the physical range (0 – 10,364 mm) of the start-up (pre-filter) window. Four sample readings must be found within the Pre-filter window for the MPI sensor to successfully start-up.
- This register is only to be used for diagnostics under factory direction.
40419 – Noise limit
- Sets the limit for several signals (0-255) outside the Pre-filter range for the MPI at start-up. If the
- Noise Limit is reached before four readings register within the Pre-filter window, and the MPI will not start up.
- This register is only to be used for diagnostics under factory direction.
40420 – Temperature Select
- Select the temperature sensor reading to be displayed in Input Register 30302.
- MPI-T sensors can accommodate up to seven digital temperature sensors in the stem.
- 0 = Average of sensors A – G
- 1 = Digital Temperature Sensor A
- 2 = Digital Temperature Sensor B
- 3 = Digital Temperature Sensor C
- 4 = Digital Temperature Sensor D
- 5 = Digital Temperature Sensor E
- 6 = Digital Temperature Sensor F
- 7 = Digital Temperature Sensor G
- 8 = N/A
40422 – Float Window (Factory Calibrated)
Sets the distance (0 – 1000 mm) between the first (i.e. top) float and the point at which the sensor will begin looking for the second (bottom) float. 0 indicates a single float.
40424 – 2nd Float Offset
Used to calibrate bottom float reading (-10,364 – 10,364 mm).
40423 – 1st Float Offset
Used to calibrate top float reading (-10,364 – 10,364 mm).
40425 – Gain Offset (Factory Calibrated)
Used to move the centerline of the float response signal to optimize signal strength (0 – 255).
40446 – Baud Rate
- Select the communication speed between the sensor and the Server Device. All devices on the network must use the same Baud Rate.
- APG Modbus Server and Client 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.

MPI-T 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 Full
40405	Max Distance	(factory set) Level
40406	Full Distance	0 – 32,768 mm
40407	Empty Distance	0 – 32,768 mm
40436-40437	Tank Diameter	0 – 1,000,000 (mm) or
40407	Empty Distance	0 – 32,768 mm

Application 3 – Volume of Standing Cylindrical Tank ± Conical Bottom

Application 4 – Volume of Standing Rectangular Tank ± Chute Bottom

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

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 – 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)

Application 6 – Volume of Spherical Tank

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)

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)

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 Coefficient	0 – 1,000,000
40438-40439	X^2 Coefficient	0 – 1,000,000
40440-40441	X^1 Coefficient	0 – 1,000,000
40442-40443	X^0 Coefficient	0 – 1,000,000

MAINTENANCE

General Care
Your MPI-T level sensor is very low maintenance and will need little care as long as it is installed correctly. However, in general, you should:

Periodically inspect your MPI-T to ensure the stem and floats are free of any heavy buildup that might impede the movement of the floats. If sediment or other foreign matter becomes trapped between the stem and float(s), detection errors can occur.
If you need to remove the float(s) from the stem of your MPI-T, be sure to note the orientation of the float(s) before removal. This will help ensure proper re-installation of the float(s).
Ensure the housing cover is snugly 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: 888-525-7300
Email: sales@apgsensors.com
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.

HAZARDOUS LOCATION INSTALLATION AND CERTIFICATION

Intrinsically Safe Installation Drawing for Hazardous Locations

Automation Products Group, Inc.

Tel: 1 888-525-7300 or 1 435-753-7300
e-mail: sales@apgsensors.com
www.apgsensors.com
Automation Products Group, Inc. 1025 W. 1700 N. Logan, UT 84321

Documents / Resources

APG MPI-T Magnetostrictive Level Sensors [pdf] User Manual
MPI-T Magnetostrictive Level Sensors, MPI-T, Magnetostrictive Level Sensors, Level Sensors, Sensors

References

User Manual

APG MPI-T Magnetostrictive Level Sensors

Product Usage Instructions