®
Data Sheet
PT2G Series
Smart Sensor System for
Turbocharger Speed Detection, 2 nd Generation
September 30, 2014
Document-No: DB_PT2G_en V1.5
®
PT2G
Published by acam -messelectronic gmbh
©acam-messelectronic gmbh 2014
Legal note
The information provided by this data sheet is believed to be accurate and reliable.
However, acam cannot be held liable for any of its contents, neither for acc uracy, nor for
completeness. The compiled information is believed correct, though some errors and
omissions are likely. We welcome any notification, which will be integrated in succeeding
releases.
The acam recommendations are believed useful, the firmware proposals and the
schematics operable, nevertheless it is the customer‘s sole responsibility to modify, test
and validate them before setting up any production process.
acam products are not designed for use in medical, nuclear, military, aircraft, spacec raft
or life support devices. Nor are they suitable for applications where failure may provoke
injury to people or heavy material damage. acam declines any liability with respect to such
non-intended use, which remains under the customer‘s sole responsibil ity and risk.
Military, space and nuclear use is subject to German export regulations.
acam does not warrant, and it is not implied that the information and/or practice
presented here is free from patent, copyright or similar protection. All registered nam es
and trademarks are mentioned for reference only and remain the property of their
respective owners. The acam logo and the PICOTURN logo are registered trademarks of
acam-messelectronic gmbh, Germany.
Support / Contact
For a complete listing of Direct Sales, Distributor and Sales Representative contacts, visit
the acam Web site at:
http://www.acam.de/sales/distributors/
For technical support you can contact the acam support team or distributors. The contact
details of acam are:
support@acam.de
2
or by phone
+49 7244 7419-0.
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PT2G
Important Safety Information
Product Use
PICOTURN products are designed for industrial use. The intended use of the product is the
measurement of speed of a turbocharger in a test bench environment or in driving tests.
For proper installation and usage please follow the mounting instructions in this document.
During operation of the test bench (including the motor and turbocharger), no persons
must be present in the test room. For use in driving tests, in which persons may be
present, use the product in such a way that in case of malfunctions or error, personnel
and equipment are not endangered. Any use other than the one described above is
considered as non-intended use and acam declines any liability with respect to such non intended use.
Installation
The speed sensor should be installed by a qualified automotive technician. Please carefully
read and follow the instructions given in this manual for proper installation and use of the
product. Furthermore, please pay attention to any installation instructions given by the
turbocharger manufacturer, especially for the mounting of the sensor at the turbocharger
and its safe operation. If you have any question or doubts regarding the installation or
operation please contact the distributor from whom you purchased the sensor or
alternatively contact acam directly.
Signal words and symbols used
The following symbols and signal words are used in this data sheet.
CAUTION indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury
NOTICE is used to address practices not related to physical injury
Safety messages
The following list provides an overview of potential damages that can occur if the
turbocharger sensor system is not operated as outlined in this manual.
Connect an adequate power supply (meeting the specifications for
supply voltage and current) in accordance with safety regulations
for electrical equipment. Otherwise there is risk of injury and/or
damage to or destruction of the sensor and controller box.
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PT2G
Mount the sensor according to the installation instruction in this
data sheet and/or the installation instructions of the turbocharger
manufacturer. If the sensor is mounted incorrectly, the sensor
itself; the turbocharger housing; or the turbo charger wheel
(blades) can be damaged. Particularly in the case where the
sensor goes too far into the turbocharger cavity, the wheel blades
may be touched and thus the turbo wheel damaged. As a
consequence, single blades of the turbo wheel could be detached
and go into the motor and cause further damage there.
Warranty
acam warrants to the original purchaser of its PICOTURN products the fitness and
merchantability. In case of approved warranty claims acam will repair or replace any
products or parts thereof that prove to be defective in workmanship or material, or credit
the original purchaser with an amount equal to the original purchase price for a period of
one (1) year after purchase. This is the purchaser’s sole and exclusive remedy and
constitutes the complete financial responsibility of acam for a warranty claim.
If the original purchaser was not the end customer, but a wholesaler (distributor), different
warranty regulations and warranty periods may apply. Please direct any request in this
case to the distributor first. In either case, for reimbursement or replacement of an
alleged defective product, a warranty claim to (a) the distributor or (b) acam direct ly must
be submitted within thirty (30) days and a Return Material Authorization Form completed
(available from the distributor or at support@acam.de).
Limitations on warranty
acam shall not be liable to the end user under any circumstances for any special,
incidental or consequential damage, including without limitation, damage to or loss of
property other than for the PICOTURN products themselves; damage incurred during
installation, repair or replacement; lost profits, revenue or opportunity; losses resulting
from or related to downtime of PICOTURN products; loss of use; the cost of replacement
transportation, power, or compression; the cost of substitute products; or claims of third
parties for such damage, howsoever caused, and whether based on warranty, contract,
and/or tort (including negligence, strict liability or otherwise).
acam disclaims all other warranties, expressed or implied.
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PT2G
Content
1
PT2G Series – Product List ............................................................................. 6
2
System Description ....................................................................................... 8
3
System Components ...................................................................................... 9
4
3.1
The Sensor Element ................................................................................. 9
3.2
Signal Conditioning Box for Power and Various Interfaces ............................. 10
3.3
Standard Cables, Pin Assignment ............................................................. 11
Connecting Options ..................................................................................... 12
4.1
Standard Wiring ................................................................................... 12
4.2
Other Connection Possibilities .................................................................. 13
4.3
Vendor Dependent Connecting Options ...................................................... 14
5
Sensor Application ...................................................................................... 16
6
Technical Data ........................................................................................... 17
7
8
6.1
Vane number ........................................................................................ 19
6.2
Diagnostics .......................................................................................... 19
6.3
Sensors, Mechanical Dimension ............................................................... 20
6.4
Technical Data for Specialists .................................................................. 21
Calibration ................................................................................................. 22
7.1
PICOTURN-CT (“PTCT”) ........................................................................... 22
7.2
Technical Data ...................................................................................... 22
7.3
Setup .................................................................................................. 23
7.4
Calibration process ................................................................................ 23
7.5
Verification .......................................................................................... 24
Miscellaneous ............................................................................................ 26
8.1
Last Changes ....................................................................................... 26
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1
Part
No.
PT2G
PT2G Series – Product List
Product
Description
Intelligent sensors with integrated signal processing and TTL output
Sensor length/
thread length
Diameter
Cable
length
Temperature range
sensor head
1537 PT2G-SM5.3
60 mm/54 mm M5 x 0.8
0.95 m
-40 °C to +230 °C
1591 PT2G-SM5.5
46 mm/40 mm M5 x 0.8
0.95 m
-40 °C to +230 °C
1660 PT2G-SM5.6
75 mm/69 mm M5 x 0.8
0.95 m
-40 °C to +230 °C
1590 PT2G-SM5F.2
41 mm/25 mm M5 x 0.5
0.95 m
-40 °C to +230 °C
1538 PT2G-SM5F.3
56 mm/40 mm M5 x 0.5
0.95 m
-40 °C to +230 °C
1666 PT2G-SM5F.5
76 mm/60 mm M5 x 0.5
0.95 m
-40 °C to +230 °C
New H-types for higher temperature and higher sensitivity
2185 PT2G-H-SM5.3
60 mm/54 mm M5 x 0.8
0.95 m
-40 °C to +250 °C
2224 PT2G-H-SM5.5
46 mm/40 mm M5 x 0.8
0.95 m
-40 °C to +250 °C
2225 PT2G-H-SM5.6
75 mm/69 mm M5 x 0.8
0.95 m
-40 °C to +250 °C
2202 PT2G-H-SM5F.2
41 mm/25 mm M5 x 0.5
0.95 m
-40 °C to +250 °C
2181 PT2G-H-SM5F.3
56 mm/40 mm M5 x 0.5
0.95 m
-40 °C to +250 °C
2182 PT2G-H-SM5F.5
76 mm/60 mm M5 x 0.5
0.95 m
-40 °C to +250 °C
New
H-types: 270°C peak temperature for 5 min, higher sensitivity, for use in critical
applications
Signal Conditioning Boxes
1526 PT2G-BX
Power supply and signal conditioning box with RS232 interface
1527 PT2G-BD
Power supply and signal conditioning box with display
890
Calibration device for PT2G-BX/BD signal conditioners
6
PICOTURN-CT
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PT2G
Part
No.
Product
Description
Accessories
1771
1569
1539
1540
PT2G-XS-01.5
PT2G-XS-03
PT2G-XS-05
PT2G-XS-10
Adapter cable, interconnecting PT2G-SM...
sensor and PT2G-Bx. signal conditioning
box
1.5 m long
3 m long
5 m long
10 m long
1541 PT2G-C-2B
1542 PT2G-C-2U
1659 PT2G-C-2B&2BNC
Power supply cable, 4 mm “banana” connectors, 2 m length
Power supply cable, open end, 2 m long
Combination cable for power supply and signals
(2 x BNC, 2 x “banana” 4 mm), long 3 m / 3.6 m
1543 PT2G-X-CT
Cable, interconnecting PT2G-Bx box and PICOTURN-CT
calibration device
1767 PT2G-X-BNCM8
Cable, connecting PT2G-BD as a display box to a PTBM box.
1 m long
1684 PT2G-C-CSM2M
Cable, connecting one PT2G sensor to a “CNTMM“ counter
Mini-module from CSM GmbH, length 2m (also available in 10 m)
1963 PT2G-C-ETAS_E441
(*)
Cable connecting two sensors PT2G to one “E441“ module from
ETAS GmbH, length: 2 m
1667 PT2G-C-IPTRKLM
Cable, connecting one PT2G sensor to an IPETRONIK “SIM-CNT“
or “M-FRQ“ counter module
(*) Please request directly from ETAS, their part number is F-00K-107-568
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PT2G
System Description
PICOTURN® is a system for measuring the rotational speed of turbochargers. Its
functional principle is one-megahertz pulse induction and eddy current discrimination, done
with a solenoid sensor that is mounted in the compres sor housing through a bore. The
sensor detects and counts compressor vanes one by one. When compared to optical
detection, this inductive method benefits from its lack of sensitivity to dirt, oil and dust.
When compared to the magnetized nut method, the PICOTURN system is safer as there is
no concern with nuts coming loose and destroying the charger and the engine. When
compared to a competing, entirely analog inductive vane counting system, the fully digital
PICOTURN device turns out to be rugged, reliable, simple to use and very cost-effective.
Since 2001 PICOTURN in its original “first” generation has proven to have advantages in
prototype vehicles and on engine test benches. It has been successfully used in passenger
cars and in commercial vehicles. Made up of discrete electronic components, it has been
developed in a continuous improvement process up to its sixth version (“PTBM -V6.2”). To
continue the improvement, it was necessary to achieve a higher degree of integration by
creating a dedicated CMOS integrated circuit (ASIC) and, as a result of this chip, the
second generation PICOTURN (“PT2G”) was developed.
In the PT2G, part of the remote electronics has now been placed close to the sensor body
for under-hood operation. Consequently, cable length and placement of the box h ave
ceased to be an issue. Passenger car engineers can now place the box in the trunk, while
commercial car engineers can now use a 10-meter cable and loop it around the cabin
hinge.
A further advantage of this new, second generation system is the wealth o f interfaces
available thus reducing the number of devices and cables needed. This is particularly
useful in vehicles. When used in a bi-turbo environment, unique solutions occur that may
be advantageous to many customers (i.e. directly connecting sensor e lements to
commercially available frequency counters providing two or more entry channels). This kind
of counter solution is somewhat expensive, so most customers are likely to prefer the
inexpensive, dedicated PICOTURN conditioner box offered by ACAM. The measuring chain
will then comprise the sensor element, the box and two signal cables plus one supply
cable. Alternatively, a combined cable may be used that integrates the supply line. A
“combi connector” will then be used instead of the BNC connectors fr om the first
generation system, which is also still available. Furthermore, the customer will choose
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PT2G
between pulse-coded, analog voltage coded, or alphanumeric data output (for
alphanumeric, opt for the “RS-232” version of the box).
As before, the sensor solenoid is housed in a M5 threaded sleeve with two different
pitches and various lengths available. The second generation system is no longer
compatible with earlier first generation components (PTBM-V1 to V6). First and second
generation components must be handled separately. Sensor placement and system
operation in general, however, remain unchanged.
3
System Components
Molded body with ASIC based
3.1
The Sensor Element
AMP Superseal connector
electronics inside
Teflon-coated shielded cable
(currently white)
Sensor body with standard M5
or fine thread, various lengths
Sensor part number code:
Part No. PT2G-SM…
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3.2
PT2G
Signal Conditioning Box for Power and Various Interfaces
Like in the PICOTURN first generation system, the conditioner electronics has been placed
in a light gray aluminum housing having the same BNC connectors and vane number
selector as before. The female supply plugs have been removed for safety reasons.
Instead, there is a 5-pole combination connector integrating power supply and interfaces,
wired in parallel to the BNC connectors. Last but not least, the system still has a
diagnostics LED, but with re-defined signal codes. Unlike the first generation system, there
is now an integrated seven-segment numeric display, which has the option of being
replaced by a computer connector (9-pole D-Sub, RS-232) for numeric data output.
LED for diagnostics
LED 7-segment display for speed
Part No. PT2G-BD
Peak hold switch
Variant with display
Part No. PT2G-BX
Variant without display
9-pole D-Sub connector, numeric
interface with RS-232
but with RS232
Number-of-vane code switch
Backside, both box variants
5-pole threaded plug connector for
supply input and for interface output
(wired in parallel to the BNC
outputs)
3-pole threaded plug
connector for the
sensor element
Output #2, BNC digital pulses
10
Output #1, BNC analog
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PT2G
3.3
Standard Cables, Pin Assignment
Supply cable with or without 5 mm banana plugs,
2 meters in length
Part No. PT2G-C-2B or PT2G-C-2U
M12-thread 5-pole combination connector,
pin assignment (exterior view of the box).
Adapter cable between sensor element
and conditioner box. Length 1.5 meters to
10 meters
Ref. PT2G-XS-xx
xx = length in meters (1.5, 03,
05, 10)
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PT2G
4
Connecting Options
4.1
Standard Wiring
This wiring corresponds to the well-known PICOTURN first generation system.
e.g. PT2G-XS-03
e.g. PT2G-SM5.3
BNC-BNC
Analog
Digital
e.g. PT2G-C-2B
Data logger
e.g. PT2G-XS-03
e.g. PT2G-SM5.3
BNC-BNC
Counter
e.g. PT2G-C-2B
Data logger
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PT2G
4.2
Other Connection Possibilities
To computer, via
RS-232 at D-Sub, 9-pole
To CAN bus
Via RS232-to-CAN converter
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PT2G
4.3
Vendor Dependent Connecting Options
4.3.1
ETAS
Etas F-00K-107-568
www.ETAS.com
4.3.2
IPETRONIK
PT2G-C-IPTRKLM
PT2G-C-IPTRKLM
www.ipetronik.com
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PT2G
4.3.3
CSM
PT2G-C-CSM2M
Can-Bus
www.csm.de
4.3.4
ATI Accurate Technologies Inc.
www.accuratetechnologies.com
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5
PT2G
Sensor Application
Prior to the PICOTURN product installation, be sure that the
turbocharger is cool.
The sensor body should be
mounted in principle as indicated
(see sketch on the right). The
compressor housing needs to be
removed. Drill a hole into the case
and cut a thread, according to the
chosen sensor housing. Select the
position of the hole so that every
vane, both big and small, will be sensed. Place the sensor directly in front of the small
vanes (“splitter vanes”), avoiding the vicinity of their upper edge (which could induce error
into the system).
The correct mounting position and method depends on the
individual geometry and characteristics of the turbocharger in use.
Contact the manufacturer of the turbocharger for information
about details on possible positions and correct mounting
instructions.
IMPORTANT: Make sure the tip of the sensor is approximately
flush with the inside contour of the housing. Otherwise, it may hit
and damage the compressor wheel.
Lock torque: The sensor body is not a 5-millimeter bolt, but merely
a sleeve with some 0.3 mm thick walls. Apply only a fraction of the
torque you would with a solid bolt: 0.3 Nm maximum (finger force,
not fist force).
Environment: The sensor element with respect to its electronics and “superseal” connector
has been designed for under-hood operation and is considered engine compartment
tolerant.
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PT2G
6
Technical Data
Table 1: Sensor tip to compressor vane distance
Maximum distance sensor-vanes
Passenger cars
Commercial vehicles
Typical for aluminum wheels
1 to 2 mm
2 to 3 mm
The maximum distance depends strongly on the turbocharger geometry, the vane
thickness at the sensor tip and the alloy of the wheel. So only an indication can be
given.
These are approximate values for aluminium compressor wheels. Exact values depend on
turbocharger geometry.
Table 2: Other operating conditions
Supply voltage (box)
9 to 36 V
Consumption (box)
-BX (RS232 option)
36 mA @24 V + 20 mA**
-BD (display option)
59 mA @24 V + 20 mA**
Temperature (box)
-40 °C to +85 °C (-40 °F to +185 °F)
Dimensions (box)
105 mm x 85 mm x 30 mm
Temperature (sensor element)
Cable and electronics
-40 °C to +125 °C (+257 °F)
Sensor tip
SM types
-40 °C to +230 °C (+446 °F)
H-SM types
-40 °C to +250 °C (+482 °F)
+270°C (+518 °F) for 5 minutes
Dimensions (sensor body)
Fine thread M5 x 0.5
With various lengths 25 mm to 60 mm
Standard thread M5 x 0.8
With various lengths 40 mm to 60 mm
Length of sensor element and
From sensor tip to sealed
cable
electronics
From sealed electronics to
Approximately 0.75 meter
Approximately 0.12 meter
“suprseal” connector
Total length
Approximately 1.00 meter
** Sensor
Table 3: Electrical operating conditions for the sensor elements PT2G-SM..
Supply voltage
+5 V DC ± 0.25 V, from low noise power supply (linear voltage
regulator)
Consumption
20 mA
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PT2G
Table 4: Signal output and metrological characteristics
(pulses)
Digital- output
Analog-output (voltage)
Interface
Specification
Remarks
Analog voltage
The output is set parallel between the BNC connector and
0.5 to 4.5 volts
the M12 combi connector
0.5 volts = stand still
Range
4.5 volts = 320,000
Slope
r.p.m. subject to
correct vane number
setting
0.5 to 4.5 V
80,000 r.p.m./V (subject to
correct vane number setting)
Measurement rate
Approximately 260 Hz
Resolution
390 r.p.m. when set to 10 vanes
Precision
0.25 % of full scale
CMOS
The output is set parallel between the BNC connector and
5V / 10 mA
the M12 combi connector
one impulse per
Minimum speed
revolution subject to
Maximum speed
Approximately 390 r.p.m.
Approximately 400,000 r.p.m.
correct vane number
Precision
Approximately 390 r.p.m.
over RS-232
Numeric output in ASCII
setting
Transfer rate
Unidirectional interface, for measurement result output
38400 baud,
only. Can be read with any port monitor including freeware
8 bits,
(e.g. Putty.exe). Output format:
no parity,
Time
1 stop bit („8N1“)
stamp
Measured value
Subject to correct vane number setting, the output reads
revolutions per minute. The time stamp is in multiples of T
= 3.84 ms. / Other: see Analog and Digital above.
Charging an interface with current may cause the box to consume more than nominal value.
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PT2G
6.1
Vane number
On the front of the case there is a
rotational code switch. This is to be used
to set the number of vanes. Setting an
inside jumper, the range is shifted from 2
to 15 to 16 to 31. To do this open the
case. The position of the jumper is shown
on the right.
The “Place” mode indicated in table 5
supports a simple sensor placement check, see table 6 below.
Table 5: Number-of-vanes setting
Code
switch
0
Without
jumper
1
Place n. c.
With
jumper
6.2
16
17
2
3
4
5
6
7
8
9
A
B
C
D
E
F
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Diagnostics
In normal operation, the LED lights green when a spinning turbo wheel is detected, and remains
dark in idle case. Red light indicates that no functional sensor is connected (for place mode see
table 6 below).
Table 6: Diagnostics light emitting diode
Mode
Measure-
LED
Sensor element
Turbocharger
color
connected?
state
Dark
No
Irrelevant
Supply or box not ok
Yes
Idle
Sensor element ok
1
Yes
Spinning2
Distance too large
1
Red
No
Irrelevant
Supply & box ok
Red
Yes
Irrelevant
Sensor element defective
Green
Yes
Spinning2
Whole system ok
Yes
Spinning
2
Signal too weak / noisy
Spinning
2
Distance & signal ok
ment mode
Place
mode
Red
3
Green
Yes
Meaning
1
Provided, the LED turns red upon disconnecting the sensor
To get the compressor wheel spinning, drive it with compressed air. Speed and sense of the
rotation are irrelevant, as long as the wheel spins not too slowly .
3
Disrupt the supply from time to time, as the system may freeze in the “LED red“ state.
2
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6.3
Sensors, Mechanical Dimension
Table 7: Sensor head dimensions
PT2G-SM5.3
PT2G-H-SM5.3
PT2G-SM5.5
PT2G-H-SM5.5
PT2G-SM5.6
PT2G-H-SM5.6
PT2G-SM5F.2
PT2G-H-SM5F.2
PT2G-SM5F.3
PT2G-H-SM5F.3
PT2G-SM5F.5
PT2G-H-SM5F.5
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PT2G
PT2G
6.4
Technical Data for Specialists
Table 8: Pin assignment 3-pole “Superseal”
Pin
Pin name Explanation
1
VCC
Supply voltage 5V DC
2
Signal
5V CMOS level, 4 mA max.
The signal is square and symmetric. Every rising edge and every falling edge
indicates one passing vane, leading to a half frequency pulse as compared to
the vane appearance frequency.
3
GND
Common ground for supply and signal. Note that the sensor housing is
potential free and not connected to ground.
The PT2G sensors digital output toggles with each vane. In other words, the frequency is half the
frequency of vanes. So please take care in case you use your own data logger and not the PT2GBx signal conditioning box. Please set only half the frequency or half the number of vanes to get
the correct frequency.
Note: A good low-noise power supply is necessary for correct indication of zero speed. A more
stringent specification is difficult to define and is not available at present. Generally speaking, linear
voltage regulators are satisfactory, switching regulators are not.
Table 9: Pin assignment M12-thread combination connector 5-pole
Pin
Pin name
Explanation
1
GND
This is the supply ground, connected to the aluminum box.
2
Signal-GND
Signal ground (internally connected to supply ground).
3
Analog-Out (Voltage)
0.5 V to 4.5 V
4
VCC
Supply voltage 9 to 36 volts DC
5
Digital-Out (Pulses)
5 V CMOS,
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PT2G
7
Calibration
7.1
PICOTURN-CT (“PTCT”)
This device is for testing and
PTCT front
Number of
calibrating the PT2G-BX and PT2G-
vanes setting
BD signal conditioning boxes. It
simulates the behavior of a sensor
mounted to a turbocharger. A
selectable vane frequency /
revolution speed is reproduced very
precisely and allows the verification
and calibration of the analog and
LED indicating power
Speed setting
digital output signals over the entire
PICOTURN-CT back + PT2G-X-CT cable
measurement range.
The number of vanes on a virtual
compressor wheel and its simulated
revolution speed are selected by
push-button code switches
Up to 32 vanes
Revolution speeds
between 0 and 360,000 rpm
Banana connectors for power
in steps of 40,000
The calibration unit itself is not measuring revolution speeds and can only be operated in
conjunction with a PT2G-Bx device.
7.2
Technical Data
Table 10:Technical data
Supply voltage (box)
9 to 16 V
Consumption (box)
20 mA @12 V
Temperature (box)
-40 °C to +85°C (-40°F to +185 °F)
Dimensions (box)
105 mm x 85 mm x 30 mm
Length of PT2G-X-CT cable,
From SMB to Superseal
Approximately 0.60 meters
connecting CT and PT2G-XS
cable
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PT2G
7.3
Setup
In order to get started with calibration, the following steps are necessary:
7.4
Connect PT2G-Bx device under test to a 12 V DC power supply (battery, stationary
power supply) by means of the PT2G-C-2B power supply cable. Connect the positive
pole to the red connector, and the negative pole to the black connector. Connect
the PTCT to the same power supply.
Connect the PT2G-Bx by means of the PT2G-X-CT cable and one of the extension
cables PT2G-XS-0.. to the PTCT.
Connect the analog output to a calibrated, precision multimeter to measure the
output voltage.
Connect the digital output to a calibrated, precision frequency coun ter.
Calibration process
For calibration the PT2G-Bx box needs to be opened. Inside, there are 3 press buttons,
labeled “+”, “S”, and “-“.
1. Press “S” button until the LED blinks in
green color (about 3 seconds).
2. Adjust the lower voltage by means of
buttons “+” and “-“. The analog voltage
should be as close to 0.5V as
possible.
acam-messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de
23
®
PT2G
3. Press “S” again to confirm the new setting. Now the LED blinks in red color.
4. Set the PTCT to 280.000 rpm (see Table 11 below). Adjust the upper voltage by
means of buttons “+” and “-“. The analog voltage should be as close to 4.0V as
possible.
5. Press “S” again to confirm the new setting.
7.5
Verification
The verification is done in two steps. First, the number of vanes is set to a fixed value and
only the speed setting is changed. Second, the speed is set to a fixed value and the vane
number is changed.
7.5.1
Fixed Vane Number
The number of vanes is set to a fixed value, namely 10, on both PT2G -Bx and PTCT. On
the PT2G rotational encoder “A” stands for 10.
In the following the setting for speed at the PTCT is increased from 0 to 8 by means of the
push buttons, and the values for output voltage and frequency are recorded, entered to
the report and compared with the target values. The report is available as ready-made
Excel sheet from acam at no charge.
The tolerable deviation is:
Table 11: Calibration
Nominal
Speed
speed
setting
1/min
0
0
1
40000
2
80000
3
120000
4
160000
5
200000
6
240000
7
280000
8
320000
7.5.2
Voltage
Frequency
+/- 0.5 % of full scale
+/- 0.009 % of full scale
run with fixed vane number
Voltage
actual
nominal
error
volts
volts
% F.S.
0,5023
0,5000
0,05
0,9998
1,0000
0,00
1,4977
1,5000
-0,05
2,0003
2,0000
0,01
2,4984
2,5000
-0,04
3,0017
3,0000
0,04
3,4997
3,5000
-0,01
4,0027
4,0000
0,06
4,5009
4,5000
0,02
actual
Hz
0,000
666,685
1333,373
2000,056
2666,744
3333,429
4000,106
4667,572
5333,408
Frequency
nominal
Hz
0,000
666,667
1333,333
2000,000
2666,667
3333,333
4000,000
4667,445
5333,333
error
% F.S.
0,000
0,000
0,001
0,001
0,001
0,002
0,002
0,002
0,001
Status
ok
ok
ok
ok
ok
ok
ok
ok
ok
Calibration run with fixed nominal speed
On the PTCT the number of vanes has to be set to 4 and the speed has to be set to 7.
This corresponds to a pulse frequency of 18,665.42 Hz. The number of vane setting on
the PT2G-Bx box is variable. It is changed from 4 * to15 (10..15 = A..F), and again the
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PT2G
values for output voltage and frequency are recorded, entered to the report and compared
with the target values.
Table 12: Calibration
Nominal
No. of
speed
vanes
setting
1/min
4
279981
5
223985
6
186654
7
159989
8
139991
9
124436
10
111993
11
101811
12
93327
13
86148
14
79995
15
74662
*
run with fixed speed
Voltage
actual
nominal
volts
volts
4,0006
4,000
3,3026
3,300
2,8354
2,833
2,4994
2,500
2,2490
2,250
2,0561
2,055
1,9018
1,900
1,7719
1,773
1,6659
1,667
1,5759
1,577
1,4989
1,500
1,4349
1,433
error
% F.S.
0,019
0,061
0,049
-0,011
-0,019
0,015
0,042
-0,016
-0,015
-0,020
-0,022
0,037
actual
Hz
4666,49
3733,17
3110,99
2666,56
2333,25
2073,98
1866,60
1696,91
1555,50
1435,85
1333,28
1244,40
Frequency
nominal
Hz
4666,355
3733,084
3110,903
2666,489
2333,178
2073,936
1866,542
1696,856
1555,452
1435,802
1333,244
1244,361
error
% F.S.
0,001
0,000
0,000
0,000
0,000
0,000
0,000
0,000
0,000
0,000
0,000
0,000
Status
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
Settings 2 and 3 will give a good frequency output but the analog out will be at 5V
Note: The maximum vane frequency (vanes per second) that can be simulated is 100 kHz. If
this frequency is exceeded due to "speed" and "no. of vanes" setting , the calibration device
automatically goes back to standstill. Choosing parameters out of range (e.g. no. of vanes
< 4 or > 32) provokes standstill simulation, too.
acam-messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de
25
®
PT2G
8
Miscellaneous
8.1
Last Changes
07.11.2008 German original
03.02.2009 Complete revision
05.03.2009 Native speaker editing
05.09.2009 Re-layout
08.03.2010 Complete revision, release 1.1
16.10.2010 Small corrections in release 1.1
02.09.2011 Release 1.3, ATI product added
22.11.2011 Release 1.4; product list updated, tables 2 and 5 amended
03.01.2012 Section 1 (product list) corrected
30.09.2014 Calibration added, general revision, adding also warnings
The products
- V 6 c omply with EMC Directive 89/336/EEC, applied standard DIN EN
61326, Equipment for Control and Laboratory ( for use in electromagnetically controlled
environment).
Generic immunity standard part 2 (EN 61000-4-4: 0,5KV, -4-6: 1V), In case of strong
electromagnetic disturbances there might be a deviation of the output signal from the specification,
but only for the duration of the disturbance.
acam , are registered trademarks of acam-messelectronic gmbh.
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acam-messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de
PT2G
acam-messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de
27
acam-messelectronic gmbh
Friedrich-List-Straße 4
76297 Stutensee-Blankenloch
Germany
Phone +49 7244 7419 – 0
Fax
+49 7244 7419 – 29
E-Mail support@acam.de
www.acam.de
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Authorized Distributor
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