Akytec ITP11 User manual

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
ITP11
Process indicator 4-20 mA
User guide
ITP11_2017.11_0247_EN
© All rights reserved
Subject to technical changes and misprints

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: [phone] · www.akytec.de
1
Contents
1Safety guidelines............................................................................................................................................2
2Intended use ...................................................................................................................................................3
3Specifications.................................................................................................................................................4
3.1 Environmental conditions.........................................................................................................................4
4Functional description...................................................................................................................................5
5Installation and operation..............................................................................................................................6
5.1 Installation................................................................................................................................................6
5.2 Operating mode.......................................................................................................................................6
5.3 Programming mode.................................................................................................................................7
6Maintenance..................................................................................................................................................10
7Transportation and storage.........................................................................................................................11
8Scope of delivery..........................................................................................................................................12
Appendix A Dimensions ...................................................................................................................................13
Appendix B Electrical connection ...................................................................................................................14

Safety guidelines
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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1 Safety guidelines
Please read through the user guide carefully before commissioning the device. Damages
that arise from non-observance of the guidelines in the user guide shall be devoid of any
liability.
−The device may only be used in the manner described in this user guide.
−No technical modifications may be made to the device.
−The device may not be used if the environmental conditions (temperature, humid-
ity etc.) are not within the limits indicated in the specification.
−The device may not be used in explosive areas and there may be no chemically
active substances in the air.
−The device should only be cleaned with a damp cloth. No abrasives or solvent-
based cleaners should be used.
Non-observance of the safety guidelines may result in damage to the device and injury to
users.

Intended use
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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2 Intended use
The ITP11 is a universally applicable, digital display unit. It is designed to be connected to
any transmitter with a 4-20 mA output. The device requires no auxiliary power and is sup-
plied directly from the measured current.
The field of application of the device includes the control and monitoring of industrial pro-
cesses. The display can be used in automated systems as a primary or secondary dis-
play.
The device may only be operated
−properly installed and
−in accordance with the specification.
Improper use
−The ITP11 may not be used for medical devices that sustain, monitor or other-
wise affect human life or health.
−The device may not be used in potentially explosive environment.
−The device may not be used in an atmosphere with chemically active substances.

Specifications
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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3 Specifications
ITP11 can be ordered in different versions. They differ in the display color.
Ordering key:
Table 3.1 Technical data
Supply current
from current loop
Input signal
4-20 mA (2-wire)
Inputs
1
Measuring range
3.8…22.5 mA
Normal operation
3.2…25 mA
Voltage drop, max.
10 V
Accuracy
0.2% + 1 digit
Display
LED, 7-segment display
Character height
14 mm
Display colour
red or green
Number of digits in display
4
Sampling rate (without damping)
1 reading / s
Dimensions
48 x 26 x 65 mm
Weight
approx. 30 g
Protection class
III
►
NOTICE
Before connecting an active output of another device to the ITP11 input, ensure
that the output voltage is sufficient for correct operation of the ITP11 (≥10 V).
3.1 Environmental conditions
The device is designed for natural convection cooling. It should be taken into account
when choosing the installation site.
The following environment conditions must be met:
−clean, dry and controlled environment, low dust level
−closed non-hazardous areas, free of corrosive or flammable gases
Table 3.2
Conditions Permissible range
Ambient temperature
-30…+70 °C
Storage temperature
-40…+80 °C
Relative humidity
up to 80% (at +25°C, non-condensing)
IP Code
front IP65, rear IP20
Altitude
up to 2000 m above sea level
ITP11-X
Display color:
- red
- greenG

Functional description
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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4 Functional description
A 4-digit, 7-segment LED display with 14 mm character height is located on the front of
the device for displaying the measured values, error messages, functions and values
during programming. The programming buttons are positioned on the cylindrical surface
of the device.
The button is used to set the programming mode and to apply the changes. The pa-
rameters can be selected and changed using buttons and . Pressing and holding
the buttons increases the speed of parameter changing in three steps.
The operating modes are described in Section 5.
The device has the following functions:
−Display process values, received from process control devices with 4-20 mA out-
put (current loop).
−The measured values are displayed on the 4-digit LED display with a maximum
range of -999…+9999 in accordance with the set limit values and the decimal
point position.
−When exceeding the measuring limit, the device displays an error message.
−Switching between linear and square root function (for special transmitters)
−Filter for damping the signal fluctuations with an adjustable time constant
−Protection against unauthorized access
Fig. 4.1Block diagram
Microcontroller
Digital filter
4-20 mА
A/D
ITP11
Square
root
function
Scaling and
adjusting

Installation and operation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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5 Installation and operation
5.1 Installation
The device is designed for switch panel mounting in a borehole of Ø22.5 mm (see Ap-
pendix A for dimensional drawings).
Carefully position the supplied gasket on the display rear surface. Insert the cylindrical
part of the device into the borehole and tighten the nut from the rear side of the switch
panel. Connect the device to the signal cable in accordance with Appendix B.
The device factory settings can be changed before assembly if necessary. For this pur-
pose the display must be connected to a standard signal 4-20 mA.
Fig. 5.1 Mounting
5.2 Operating mode
The operating mode is automatically switched on if the standard signal 4-20 mA is con-
nected to the terminals.
The input signal is digitalised, the square root calculated (if the function is enabled) and
the signal accordingly to the set parameters calibrated and displayed. The scale factor is
calculated based on the parameter di.Lo “lower limit” (according to input signal 4 mA)
and di.Hi “upper limit” (according to input signal 20 mA).
If the input signal is lower than 3.8 mA, the error message Lo is displayed.
If the input signal is higher than 22.5 mA, the error message Hi is displayed.
Square root function
This function is intended for transmitters with square characteristic curve. To enable the
function, the parameter Sqrt must be set to ON.
Damping function
Undesirable signal fluctuations can be suppressed through the adjustable filter constant.
The most important feature of the exponential filters is τd– the filter time constant (pa-
rameter td) (see Fig. 5.2 and Table 5.1).
If the constant increases, the display reacts to changes of the input signal more slowly
and the susceptibility to interference is lower.

Installation and operation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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Fig. 5.2
5.3 Programming mode
In programming mode the necessary parameters can be changed (see Table 5.1).
To return to the operating mode, the button must be pressed for longer than 5 s. If no
button is pressed within 20 s, the device reverts to operating mode automatically.
The flowchart is presented in Fig. 5.3.
Table 5.1
Parameter
Comments
Valid values
PS Access protection
on 1)
oFF
di.P Decimal point position
(from the right)
– -– -– -–.
-– -– -–.-–
-– -–.-– -–
-–.-– -– -–
di.Lo
Lower limit (with 4 mA)
-999…4.00…9999 2)
di.Hi
Upper limit (with 20 mA)
-999…20.00…9999 3)
td
Filter time constant in seconds
0…1…10
Sqrt Square root ON / OFF
on
oFF
Comments:
1. Factory settings are highlighted.
2. With particular setting parameters the device cannot display the necessary minus sign
due to the restriction to four segments. The parameters are configured as follows:
di.Lo: -999 4 mA
di.Hi: 9999 20 mA
With an input measured current of 3.8 mA the correct display should be “-1068”. Due to
the restriction to four segments, the minus sign is removed and the display is “1068”.
3. With particular setting parameters the device cannot actually display the necessary 5
figures due to the restriction to four segments. The parameters are configured as fol-
lows:
di.Lo: -999 4 mA
di.Hi: 9999 20 mA

Installation and operation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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With an input measured current of 20.8 mA the correct display should be “10548”. Due
to the restriction to four segments, the first character is removed and the display is
“0548”.
Fig. 5.3
To enter the programming mode use the button .
To scroll the parameters use the buttons and , to change the parameter use the
button .
When the device is switched on for the first time or the access protection is activated, 0 is
displayed.
Use the buttons and to enter the correct passcode (factory setting – 5), then press
the button to confirm.
If an incorrect passcode is entered, the device reverts to operating mode.

Installation and operation
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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If the passcode protection is disabled (the parameter PS is oFF), the passcode is not
requested.
If the button is pressed while the parameter PS is being displayed, the following char-
acters appear on the display: I- - - - . This means that the upper end of the menu has
been reached.
If the button is pressed while the parameter Sqrt is being displayed, the following
characters appear on the display: - - - -I. This means that the lower end of the menu has
been reached.
Briefly push the button (< 1 s) to change the selected parameter. The display indi-
cates the actual parameter value. The factory settings are shown in Fig. 5.3 and Table 2.
The value can be changed using buttons and . After confirming by pressing the
button, you return to the parameter list.
Potential errors and troubleshooting measures are listed in Table 5.2.
Table 5.2 Error display
Display
Possible cause of error
Remedy
Lo
Input current lower than 3.8
mA Check input signal
Hi
Input current higher than
22.5 mA Check input signal
None No input signal Check input signal
Reverse polarity on input Check polarity

Maintenance
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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6 Maintenance
The maintenance includes:
−cleaning the housing and the terminals from dust, dirt and debris
−checking the fastening of the device
−checking the wiring (connecting leads, fastenings, mechanical damage)
The device should be cleaned with a damp cloth only. No abrasives or solvent-containing
cleaners may be used.
The safety guidelines in Section 1 must be observed when carrying out maintenance.

Transportation and storage
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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7 Transportation and storage
Pack the device in such a way as to protect it reliably against impact for storage and
transportation. The original packaging provides optimum protection.
If the device is not taken immediately after delivery into operation, it must be carefully
stored at a protected location. The device should not be stored in an atmosphere with
chemically active substances.
Storage temperature range: -40…+80 °C
►
NOTICE
The device may have been damaged during transportation.
Check the device for transport damage and completeness!
Report the transport damage immediately to the shipper and akYtec GmbH!

Scope of delivery
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
12
8 Scope of delivery
−ITP11 1
−Gasket 1
−Mounting nut 1
−User guide 1

Appendix A Dimensions
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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Appendix A Dimensions
Fig. A.1
To prevent the device spinning, the borehole in the front panel must correspond to the
dimensions in Fig. A.2.
Fig. A.2.
PROG
26
48
10
65
Ø 22,5
20,8
М22

Appendix B Electrical connection
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover· Germany · Tel.: [phone] · www.akytec.de
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Appendix B Electrical connection
Fig. B.1 Connection to the device with active output 4-20mA
Fig. B.2 Connection to the device with passive output 4-20mA
Fig. B.3 Connection of 2 or more ITP11 to a 4-20 mA source