Minebea Intec MP 26 Use and care manual

Installation and Calibration Manual
Transmitter
MP 26
Installation and
Calibration Manual
9499 050 26000 Edition 5 07/10/2018
for Rel. 1.1
Minebea Intec GmbH, Meiendorfer Str. 205 A, 22145 Hamburg, Germany
Phone: [phone] Fax: [phone]

Please note
Any information in this document is subject to change without notice and does not represent a commitment
on the part of Minebea Intec unless legally prescribed. This product should be operated only by trained and
qualified personnel. In correspondence concerning this product the type, name and release number as well as
all license numbers in relation to the product have to be quoted.
Bitte beachten
Alle Angaben in diesem Dokument sind - soweit nicht gesetzlich vorgegeben - unverbindlich für Minebea Intec
und stehen unter Änderungsvorbehalt. Die Bedienung des Produktes darf nur von geschultem, fach- und
sachkundigem Personal durchgeführt werden. Bei Schriftwechsel über dieses Produkt bitte Typ, Bezeichnung
und Versionsnummer sowie alle mit dem Produkt in Zusammenhang stehenden Lizenznummern angeben.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-1
Table of Contents
TABLE OF CONTENTS............................................................................................................................................. 1
1. MP 26 TRANSMITTER............................................................................................................................. 3
1.1. DESCRIPTION........................................................................................................................................ 3
1.1.1. Versions .......................................................................................................................................... 3
1.1.2. Transmitter Overview / Features .................................................................................................... 3
1.2. HOUSING .............................................................................................................................................. 4
1.3. DISPLAYS AND CONTROLS ................................................................................................................... 6
2. INSTALLATION ........................................................................................................................................ 8
2.1. CONNECTING THE SUPPLY VOLTAGE ................................................................................................... 8
2.2. CONNECTING THE LOAD CELL ............................................................................................................. 8
2.3. CONNECTING DIGITAL INPUT ‘DI’ ........................................................................................................ 8
2.4. CONNECTING OUTPUTS OUT1 /OUT2 ................................................................................................ 9
2.5. CONNECTING OUTPUT OUT3 ............................................................................................................. 10
3. OPERATION VIA FRONT KEYS ......................................................................................................... 11
3.1. POWER ON......................................................................................................................................... 11
3.2. STATUS LED ...................................................................................................................................... 11
3.3. DISPLAY............................................................................................................................................. 11
3.4. KEY PAD ............................................................................................................................................ 12
3.4.1. Enter Key Functionality................................................................................................................ 12
3.4.2. Increment & Decrement Key Functionality .................................................................................. 13
3.5. CONFIGURATION LEVELS ................................................................................................................... 14
3.6. CALIBRATION ..................................................................................................................................... 14
3.7. PARAMETER AND CONFIGURATION .................................................................................................... 15
3.7.1. Device ........................................................................................................................................... 15
3.7.2. Zero Setting................................................................................................................................... 16
3.7.3. Tare Setting................................................................................................................................... 17
3.7.4. Limit Value Processing................................................................................................................. 18
3.8. RESET TO FACTORY SETTINGS ........................................................................................................... 18
4. CALIBRATION ........................................................................................................................................ 19
4.1. GENERAL............................................................................................................................................ 19
4.2. CALIBRATION ..................................................................................................................................... 20
4.3. CALIBRATION VIA THE DEVICE .......................................................................................................... 21
4.3.1. Initial Setting via the Device......................................................................................................... 22
4.3.2. Calibration by Load...................................................................................................................... 26
4.3.3. Dead Load Correction.................................................................................................................. 28
4.3.4. Calibration by Value..................................................................................................................... 30
4.4. ZERO SETTING.................................................................................................................................... 33
4.5. TARE SETTING.................................................................................................................................... 34
4.6. EXAMPLE:CALIBRATION BY VALUE .................................................................................................. 35
4.7. SETTING THE LOW PASS FILTER AND BANDWIDTH ............................................................................ 36
5. CONFIGURING OUTPUTS.................................................................................................................... 37
5.1. OVERVIEW ......................................................................................................................................... 37
5.2. CONFIGURING OUT.1 AND OUT.2...................................................................................................... 37
5.2.1. Define the Limits........................................................................................................................... 38
5.2.2. Configure the Output .................................................................................................................... 39
5.2.3. Setting Values for Limit Processing.............................................................................................. 39
5.2.4. Operating Principle: Limit Value Processing .............................................................................. 40
5.3. OUTPUT OUT.3 (ANALOG).................................................................................................................. 41
5.3.1. Analog Output Configuration Example ........................................................................................ 41

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-2
6. POSSIBLE ERRORS & REMEDIES ..................................................................................................... 42
6.1. GENERAL............................................................................................................................................ 42
6.2. ERROR LIST ........................................................................................................................................ 43
6.3. DETECTION AND DISPLAY OF SENSOR AND WIRING ERRORS.............................................................. 44
7. TECHNICAL DATA ................................................................................................................................ 45
7.1. INPUTS................................................................................................................................................ 45
7.1.1. Input M ......................................................................................................................................... 45
7.1.2. Digital Input DI1 .......................................................................................................................... 45
7.2. OUTPUTS ............................................................................................................................................ 46
7.2.1. Relay Outputs OUT1, OUT2......................................................................................................... 46
7.2.2. OUT3 as Universal Output ........................................................................................................... 46
7.3. GALVANIC ISOLATION........................................................................................................................ 47
7.4. POWER SUPPLY .................................................................................................................................. 47
7.4.1. AC Supply ..................................................................................................................................... 47
7.4.2. Universal supply 24 V UC ............................................................................................................ 47
7.4.3. Behaviour with power failure ....................................................................................................... 47
7.5. ENGINEERING FRONT INTERFACE....................................................................................................... 48
7.6. ENVIRONMENTAL CONDITIONS .......................................................................................................... 48
7.6.1. Protection mode............................................................................................................................ 48
7.6.2. Permissible temperatures ............................................................................................................. 48
7.6.3. Humidity ....................................................................................................................................... 48
7.6.4. Shock and vibration ...................................................................................................................... 48
7.6.5. Electromagnetic compatibility ...................................................................................................... 48
7.7. GENERAL............................................................................................................................................ 49
7.7.1. Housing front................................................................................................................................ 49
7.7.2. Connecting terminals.................................................................................................................... 49
7.7.3. Electrical safety ............................................................................................................................ 49
7.7.4. Certifications ................................................................................................................................ 49
7.7.5. Electrical connections................................................................................................................... 49
7.7.6. Mounting method .......................................................................................................................... 49

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-3
1. MP 26 Transmitter
1.1. Description
The instrument is equipped with a monochrome, two-line 4-character display and a keypad
which contains 3 keys. The instrument is a weighing system, especially designed for tank &
hopper weighing, platform scales & weight transmitters in industrial application.
1.1.1. Versions
MP 26 Transmitter
Y
0 MP 26/00 90 to 260 V AC
Y
1 MP 26/01 18 to 30 V AC /18 to 31 VDC
A label is affixed to the rear panel of the instrument which contains information about the
product. A sample is given below:
TYP: MP26/01
NC:9408-800-26011
Ident: 622653810 0003
Vers: 1.1
Ser .No. 80 268 09530
1.1.2. Transmitter Overview / Features
Compact construction, only 22.5 mm wide
Clips onto top-hat DIN rail
Plug-in screw ports or spring clamp connectors
Dual-line LC display with additional display elements
Process values always in view
Convenient 3-key operation
Strain gauge input with high signal resolution (>15 bits)
Universal output with high resolution (14 bits) as combined current / voltage output
Quick response, only 50 ms cycle time, i.e. also suitable for fast signals
Two relay outputs
Customer-specific linearization
Tare function
Min/max indicator ("slave pointer")
Logical linking of digital outputs, e.g. for common alarms
Preset for output value
Galvanic insulation is provided between inputs and outputs as well as from the supply
voltage and communication interfaces.
9
4
0
8
-
8
0
0
-
2
6
Y
1

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-4
1.2. Housing
The entire housing is IP20 Protected. The overall dimensions of the device are 117.5 x 22.5 x
99 mm (L x W x H).
The unit is designed for vertical mounting on 35 mm top-hat rails to EN 50022.
If possible, the place of installation should be free of vibration, aggressive media (e.g. acid,
lye), liquid, dust or aerosol.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-5
Mounting & Dismounting the Device
The instruments can be mounted directly side by side. For mounting and dismounting, a
minimum of 8 cm free space above and below the units should be provided.
For mounting, simply clip the unit onto the top-hat rail from the top and click it into
position. To dismount the unit, pull the bottom catch downwards using a screwdriver and
remove the unit upwards
Note:
The transmitter MP 26 does not contain any maintenance parts, i.e. the unit need not be opened by the
customer.
The unit may be operated only in environments for which it is suitable due to its protection type. The housing
ventilation slots must not be covered.
In plants susceptible to transient voltage peaks, the instruments must be equipped with additional protective
filters or voltage limiters!
CAUTION!
The instrument contains electrostatically sensitive components.
To maintain contamination degree 2 according to EN 61010-1, the instrument must not be installed below
contactors or similar units from which conducting dust or particles might settle.
Dismounting

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-6
1.3. Displays and Controls
Display Line 1: Displays process value
Display Line 2: Displays unit / extended operating level / error list / Conf and PArA level
values
Status Indicator: The statuses of the active functions are displayed as bars above the
corresponding functionality.
Tare Function: The bar symbol above F in display line 2 indicates that tare is active.
Error:The bar symbol above E in display line 2 indicates an error has occurred. The error list
can be viewed by pressing the enter key.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-7
Increment Key: Is used to increment the values / slave pointer/ to display maximum value.
Enter Key: Is used to select extended operating level or error list, parameter, configurations
and installations levels.
LEDs: This LED indicates the status of the device. There are 3 color codings:
•green: limit value 1 OK
•red: limit value 1 active
•red blinking: instrument fault, configuration error
Digital OUT1: The bar displayed above 1 indicates the switching status of output OUT1 active.
Digital OUT2: The bar displayed above 2 indicates the switching status of output OUT2 active.
Decrement Key: Is used to decrement the values / slave pointer/ to display minimum value.
PC Connector:Slot for connecting the device to PC to ease work with the MP26/10 tool. To
facilitate withdrawal of the PC connector from the instrument, press the plug to the left.
Note:
The second LCD line normally shows the set point. When moving over to the parameter setting, configuration or
calibration level and at the extended operating level, the parameter name and value are displayed alternately.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-8
2. Installation
2.1. Connecting the Supply Voltage
Depending on the device version, connect the supply voltage as below:
MP 26/00 90…260 V AC ports: 15, 16
MP 26/01 24 V AC / DC ports: 15, 16
2.2. Connecting the Load Cell
The device can be connected to 4-wire or 6-wire
technology load cells. 6-wire technology load cells can be
connected directly as shown in figure.
If 4-wire technology is used:
short V + and S+
short V - and S-
Excitation voltage for bridge V+, V- ports: 1, 4
Excitation voltage measuring signal S+, S- ports: 2, 3
Bridge signal M+, M- ports: 5, 6
Measurement and data lines should be kept separate from control and power supply cables.
Sensor measuring cables should be twisted and screened, with the screening connected to
earth clamp.
2.3. Connecting Digital Input ‘di’
Input ‘di1’ is a digital input to the device which has to be connected as a
potential free contact. This di1 can be used for operation disabling, reset of
stored alarms and the min/max indicator to enable the tare function and zero
setting. It is configurable as a direct or inverse switch or push button.
Control input (as a potential free contact) ports: 7, 8
Switched voltage: 5 V
Current: 0.5 mA

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-9
2.4. Connecting Outputs OUT1 / OUT2
Two digital outputs can be set from the device. The outputs are
activated according to the configuration and parameter settings.
The relay outputs should be max. 250V/2A.
No
contact should exist between common terminals.
OUT1 ports: 17, 18
OUT2 ports: 17, 14
Note:
If relays OUT1, 2 and 3 are used to operate external contactors, these must be fitted with RC snubber circuits
according to manufacturer specifications to prevent excessive voltage peaks at switch-off.
Contact type:
2 normally open relay outputs with common
contact connections (galvanic insulation is
provided between inputs and outputs )
Max. contact rating:
500 VA, max. 250 V, max. 2A at 48...62 Hz,
ohmic load
Min. contact rating:
6 V, 1 mA DC
Switching cycles
(electrical)
for I = 1 A/2 A:
>800,000/500,000 (at~250V (ohmic load)

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-10
2.5. Connecting Output OUT3
The Out3 is an analog output through which voltage or current can be led
based on the configuration.
Current (0...20mA) ports: 11, 12
Voltage (0...10V) ports: 12, 13
Its current output is configurable 0/4...20 mA, short-circuit proof.
Control range:
-0.5....23 mA
Load:
<
600 Ω
Load effect:
<0.02%
Resolution:
<
1.5 µA
Error:
<0.1%
Its voltage output is configurable 0/2...10V, not permanently short-circuit proof
Control range
0.15...11.5 V
Load:
>
2 kΩ
Load effect:
<0.06%
Resolution:
<0.75 mV
Error:
<
0.1%
Additional error when
using the current output
simultaneously
<
+0.09%

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-11
3. Operation via Front Keys
3.1. Power ON
Switching ON the supply powers up the device, the device initializes itself (display, load cell
lines) and checks for any errors. The device status is indicated by the LED (red / green). For
proper operation, the system should be warmed up for minimum 20 minutes.
Initialization also takes place when loading the configuration through the serial port of the
MP26/10 software.
3.2. Status LED
The status LED indicates the status of the device. The status is indicated by the color of the
light:
Green indicates normal operation
Red indicates limit value1 is active/ON
Red blinking indicates instrument fault, configuration error
3.3. Display
There are two display lines available in the device. The first line displays the process values.
The second line displays the unit/error list /configuration settings / parameters.
Default display mode Display of further operating levels
There are two modes of display available in the device based on the level in which the user is
working.
Default display mode: This shows the processed weight value along with its unit.
Operating mode: This mode is used to set the configuration or parameters or display error or
to calibrate the system
Note:
In case of incorrect input values, signals dependent on input (e.g. Inp1, Inp2, display value, Out3) will also
indicate FAIL.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-12
3.4. Key Pad
There are 3 keys on the device:
Enter key
Increment key
Decrement key
3.4.1. Enter Key Functionality
By using the enter key, different values can be loaded in display line 2.
Pressing the enter key for more than 3 sec
enables the device to move to further operating
levels.
If an error has occurred in the device, it is indicated by a status bar over E;
the error can be viewed by pressing the enter key. Pressing the enter key
reveals further errors if present.
Note:
If none of the keys are pressed in the operating mode, then the system returns to the default display mode.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-13
3.4.2. Increment & Decrement Key Functionality
Moving to Menu Levels
The increment / decrement keys can be used to move through different submenu levels. The
increment key performs forward movement and the decrement key performs backward
movement. This is shown in the operating levels.
Displaying min & max Values
The minimum and maximum input values are stored in the device and can be displayed by
using decrement and increment keys in normal mode.
The minimum value is displayed as long as
the decrement key is pressed.
The maximum value is displayed as long as
the increment key is pressed.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-14
3.5. Configuration Levels
There are 3 configuration levels/modes available for the MP 26:
1. Normal Mode: displays the weight value along with its unit
2. Installation Mode: enables user to calibrate the system
3. Parameter Mode: enables user to set limit values & input values.
4. Configuration Mode: enables user to switch ON various functionalities and their
associated settings
5. End: enables user to save and exit the operating levels
3.6. Calibration
Calibration of the scale must be followed by initial setting. After entering the prerequisites in
the initial setting, the instrument can be calibrated for the given weight or value. Calibration
can be carried out in two ways: one method is to use the MP26/10 tool and download the
settings to the device. The other method is to use the device and its keys. Please refer to
Chapter 4 for more details.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-15
3.7. Parameter and Configuration
3.7.1. Device
Parameter
Parameter enables us to set to the input and limit values. The parameter for input and limit
values are given below. Depending on the device version and set configurations, values may
be hidden. The data that can be operated via the front panel are shown below
Note:
This menu is only used to set limits. For normal settings, use the menu in Chapter 4.3.

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-16
Configuration
Depending on the device version and other configurations, the configuration data may be
hidden. The data that can be operated via the front panel are shown below:
3.7.2. Zero Setting
Zero setting is used to zero the scale. It deletes the display of accumulated deposits that could
falsify the measurement.
The zero set function is enabled through the configuration
(FuncFunc1 = 1).
Zero setting is achieved by
Inputting a pulse [XXXX ms] on the digital input or
Pressing a combination of keys or
Setting a limit value
Interface only (LOGIZErO)
For more details, please refer to Chapter 4.4: Zero Setting

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-17
3.7.3. Tare Setting
The tare function is used to tare the weight of the scale and the scale displays zero. Then, the
net weight can be measured (net = gross – tare). The gross weight can be found by switching
off the tare function.
The bar symbol above F in the display line 2 indicates that tare is active.
The tare function is enabled through the configuration
(FuncFunc2 = 3).
Tare setting can be input in the device by
Inputting a pulse [XXXX ms] on the digital input or
Pressing a combination of keys or
Setting a limit value
Interface (LOGItArA)
For more details, please refer to Chapter 4.5: Tare Setting

MP 26 Transmitter Installation and Calibration Manual
Minebea Intec
EN-18
3.7.4. Limit Value Processing
Max. three limit values can be configured for the outputs. Generally, both outputs
Out.1…Out.2 can be used for limit value or alarm signalling.
Several signals allocated to an output are linked by a logic OR function.
The signal to be monitored can be selected separately for each alarm in the configuration.
The following signals are available:
Process value (displayed value)
Measured value INP
Zero adjustment
Each limit Lim.1…Lim.3 has two triggering points H.n (Max) and L.n (Min) which can be
switched off individually (parameter = OFF). The hysteresis HYS.n for each limit is adjustable,
see Chapter 5.2.4.
3.8. Reset to Factory Settings
In the event of faulty configuration, the MP26 transmitter can be reset to the default
manufacturer’s state. The steps for resetting MP 26 are as given below:
1. Keep the increment and decrement keys
pressed during power-on. After the
display shows, wait for 1 sec until the
display shows.
2. Then, press key increment to select YES.
3. Confirm factory resetting with enter and
the copy procedure is started
(display COPY).
4. Finally, the device restarts.