Airpax - AI-Tek Instruments
In our industry, there’s nothing wrong with being predictable.
AI-Tek Speed Sensors >> Tachometers >> Accessories
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Table of Contents
Tachometers
STACKTACH Single Input Industrial Tachometer ............ 4
Tach•Pak® 1 Digital Process Speed Switch .................... 7
Tach•Pak® 3 Digital Process Tachometer ..................... 10
Tachtrol® 3 Dual Input Digital Tachometer .................... 13
Enclosure Options .......................................................... 16
Sensors
Principles of Operation of VR Sensors ........................... 21
Magnetic Sensor Selection ............................................ 22
Calculation of Output Voltage ........................................ 23
Passive Speed Sensors, VR Types ........................ 24 - 35
Side Look Sensors ......................................................... 36
Hall Effect Sensors ................................................. 39 - 45
Bi-Directional, Dual Channel, Hall Effect Sensors .. 46 - 49
Accessories
Connectors and Cable Assemblies ................................ 50
Split and Solid Gears ..................................................... 52
Tachometer Transducers ............................................... 54
Sensor Mounting Brackets ............................................. 56
Part Number Index ................................ Inside Back Cover
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2
AI-Tek Instruments, Cheshire, CT USA
Introduction to AI-Tek Instruments, LLC
AI-Tek Instruments designs and manufactures speed sensors
and tachometer products which protect and monitor rotating equipment. AI-Tek Instruments is committed to provide the highest quality
products it can, at competitive prices, through its ISO 9001 certified
quality system. This commitment is the reason we have enjoyed over
50 years of continuous service to our customers.
Formerly known as Airpax Instruments as part of Philips North America
Corporation, it was sold to VDO Control Systems, Inc. in 1998 who sold the
Airpax Instruments portion of the business to AI-Tek Instruments, LLC in
2001.
With our many years of experience, we at AI-Tek Instruments look forward
to providing you with improved levels of service and products and with
continuous growth, domestically and internationally, in the years to come.
About AI-Tek® Tachometers
Not all tachometers are the same, and this is certainly true of the AI-Tek
Instruments tachometry line.
Designed with severe industrial environments in mind, these units will
provide reliable around-the-clock operation for years under adverse conditions.
AI-Tek Instruments is a leader in manufacturing this type of instrument.
Our prices reflect the design, quality, ruggedness and engineering of the
equipment. What you really get with AI-Tek Instruments is a superb priceperformance ratio. It may not initially be the least expensive equipment
available but, in the long run, the value of this equipment is that it will outperform and outlast others.
It is the customer's responsibility to determine whether the product is proper
for customer's use and application.
The information contained herein is subject to change without notice. Refer
to the factory for verification of any details.
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STACKTACH
Single Input
Industrial Tachometer
(New)
CE Compliant
Part Number Series T77410
Precisely What You Need
AI-Tek's New STACKTACH
Features and Advantages
AI-Tek is pleased to introduce a
new tachometer to meet today's
requirements for compact packaging.
Using the same highly reliant and
quality design customers have come
to depend on, AI-Tek now makes
a tachometer available in a .9'' thick
(22.5mm) DIN rail mount package.
Easily programmed through a hand
held pendant, the STACKTACH’s
Analog Output can be set for 0-20 or
4-20 mA range for the precise scale
you need. The 6 Amp, 300 Vac,
C-form relay can be set for the exact
speed and hysteresis required for
your application.
Designed to meet the latest European standards, the STACKTACH is
mounted in a rugged IP40 rated
enclosure and has been fully tested
to the following standards.
• EMC - Electromagnetic Compatibility: complies to CE per EMC
Directive 89/336/EEC.
Immunity per EN 50082-2, 1995
Emission per EN 50081-2, 1995.
• Vibration: Meets IEC 68-2-6, 10
to 150 Hz, 2g.
• Shock: Meets IEC 68-2-27, 50g
half sine
.
Powered by 24 Vdc, AI-Tek can also
provide a switching power supply,
capable of powering as many as
three STACKTACHs. This power
supply is UL, CSA and DIN VDE
listed and CE compliant.
• Fast response overspeed
shutdown
• PLC control input
• Petrochemical production
• Pump or generator alarm
• Low speed tachometer
• Expanding analog scale speed
transmitter
• Start-up, over/under speed
switching
• Textile production applications
• RPM measurement
• Paper and pulp production
• Turbine speed control input
• Metal production
• Mining applications
• Frequency measurement
• Test labs
• Generator sets
• Food processing
• Conveyor protection
• Printing industry
Applications
Ordering P/N
T77410-10
It is the customer's responsibility to
determine whether the product is
proper for customer's use and
application.
4
T77410-P
T77410-100/240AC
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Description
Weight
STACKTACH using 24 Vdc supply,
6 oz.
(1) Analog Output, (1) 6 Amp Relay
Programming Pendant
Switching Power Supply - able to
convert 100 Vac thru 240 Vac. 50-60
Hz input to 24 Vdc output.
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5 oz.
3PECIFICATIONS
3IGNAL)NPUT
4YPE Active or passive pickup
determined by software settings (jumper
required for active pickups)
!#)NPUTSINEWAVE
Input Impedance
Sensitivity @ 1KHz
Max. Voltage Input
= 2000 ohms
= 250 Vrms
= 25 Vrms
0ULSE)NPUT44,COMPATIBLE
Input Impedance
= 2000 ohms
Min. Pulse Width
= 10 µS
Logic 0
= V in < .5V
Logic 1
= V in > 1.5V
(+ 12 VDC @ 50mA supplied forpowered sensors)
&REQUENCY2ANGE Upper limit 30 kHz.
Lower limit software selectable form
.0625 Hz to 10 Hz.
)NPUT0OWER
24 Vdc (24-30 V), std. 600 ohm analog
load. 7 watts max. power.
*A switching power supply, P/N T77410
- 100/240 AC, is available. It converts
100 Vac thru 240 Vac, 50/60 Hz input
power to 24 Vdc output.
/UTPUT
2ELAY/UTPUT One SPDT relay, rated
6 amps @ 28 Vdc or 300 Vac, 170 W or
1800 VA. Frequency hysteresis
selectable from 0.0% to 99.9%, or
4ERMINAL
"LOCK
latching with remote reset. Relay logic
and type selectable. Time hysteresis
selectable 000 to 99 data acquisitions
or latching with delay of 000 to 999 data
acquisitions.
!NALOG/UTPUT Selectable from 0 to 20
mA or 4 to 20 mA ±.5%. True current,
600 ohm maximum loop resistance. Full
scale and zero scale selectable from 0
Hz to 30 kHz.
#ONSTANT3TORAGE Retained in EAROM
and may be altered 1,000,000 times.
%LECTRICAL2EFERENCES
DC power is
referenced to digital common. Analog
output is referred to analog output
common. Passive inputs are balanced.
Active pickup inputs are referenced to
circuit common. Form C relay contacts
are isolated.
2ESPONSE 50 millisec. updates above
100 Hz. See manual for updates
between 20 and 100 Hz, one cycle
below 20 Hz.
%LECTROMAGNETIC#OMPATIBILITY
The
STACKTACH shall function to the
requirements of the European Council
Directive 89/336/EEC, the EMC
Directive.
!CCURACY ±0.05% for relay setpoints in
operations over temperature range,
±0.5% of full scale for analog outputs.
EN61000-4-2, 1995: ESD: ±8kV Air,
±4kV contact discharge.
IMMUNITY per EN 50082-2 1995:
EN61000-4-3, 1997: Radiated R-F: 10
V/m, 80 to 1000 MHz.
%NVIRONMENTAL
ENV50204, 1995: Radiated pulsed:
10 V/m, 900 MHz.
6IBRATION Tested to IEC 68-2-6, 10-150
Hz, 2g.
ENV50141: Conducted noise: 10V, 150
KHz to MHz.
3HOCK Tested to IEC 68-2-27 50g half
sine.
EN61000-4-8, 1994: Power frequency,
magnetic field: 1 A/m.
4EMPERATURE -10°C to 55°C operating.
-40°C to 80°C storage.
%NCLOSURE
IP 40
EMISSION per EN50081-2 1995:
(UMIDITY Tested to IEC 654-1, IEC 682-3 90% Humidity.
4ERMINAL
EN61000-4-4, 1994: EFT/B: 2 kV
EN55011, 1998: Class B radiated
emissions.
$ESCRIPTION
TB1
1
Input Signal +
TB1
2
Input Signal -
TB1
3
Shield
TB1
4
+12 Vdc Output (50 mA max.)
TB2
5
0-20/4-20 mA Analog Output (+)
TB2
6
0-20/4-20 mA Analog Output (-)
TB2
7
Verify/Calibrate (when connected to +12 Vdc)
TB2
8
Digital Common
TB3
9
Digital Common
TB3
10
+24 Vdc Input
TB3
11
Relay Resent (when connected to Digital Common)
TB3
12
Earth
TB4
13
K1 Common
TB4
14
No Connection (not used)
TB4
15
K1 Normally Closed
TB4
16
K1 Normally Open
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TACH•PAK® 1
Digital Process Tachometer
(Speed Switch Only)
CSA Listed
Part Number Series T77130
Faster - More Accurate - Field
Programmable
The Tach•Pak 1 computing
speed switch is a single channel
instrument. It measures input
frequency and converts the resulting
quantities to relay closure.
The microcomputer-based
Tach•Pak 1 speed switch uses
adaptive period averaging which
permits a combination of fast
response and high accuracy not
available in other industrial speed
instruments. The instrument
functions can easily be programmed
in the field or altered at any time
using a unique internal switch
design.
Typically, a Tach•Pak 1 speed
switch is used with magnetic
sensors as a signal source. However, it may receive a sine wave or
TTL signal from any frequency
source. The resulting speed is used
for alarm switching. It is superior in
applications requiring fast update
times and high accuracy for equipment protection.
It is the customer's responsibility to
determine whether the product is
proper for customer's use and
application.
Features and Advantages
Applications
Quicker Response Time - 50 millisecond updates above 100 Hz.
Higher Level of Accuracy - p.05% for
relay setpoints in operation over
temperature ranges.
Field Programmable - Adaptable to
various applications and requirements by utilizing a unique internal
switch design. No additional
calibration equipment is required.
Digital Configuration - Utilizes adaptive period averaging and floating
point calculation.
2 Relays - Sealed 6 amp SPDT auto
reset or latching.
AC or DC Power - Adaptable to either
AC or DC power source.
• Fast response overspeed
shutdown
• Petrochemical production
applications
• Pump or generator alarm
• Low speed switching
• Start-up, over/under speed
switching
• Textile production applications
• Machine control
• Paper and pulp production
• Turbine speed control
• Food processing
• Conveyor alarms
• Printing industry
• Metal production
• Mining applications
• Test labs
• Generator sets
• Broken or slipping belt drives
Ordering P/N
Input Power
T77130 -11
-12
-41
-42
-71
-72
120 Vac/24 Vdc
240 Vac/24 Vdc
120 Vac/24 Vdc
240 Vac/24 Vdc
120 Vac/24 Vdc
240 Vac/24 Vdc
*
**
See page 16 for dimensions
See page 17 for dimensions
Enclosure
Standard NEMA 1
Standard NEMA 1
NEMA 4X *
NEMA 4X *
Explosion Proof **
Explosion Proof **
Net Weight
(lbs.)
2.5
2.5
5.7
5.7
39.0
39.0
7
Specifications
Signal Input
Type: Software selectable for passive
or active sensors & terminal block
jumper for active sensors.
AC Input (sine wave):
Input Impedance
= 2K ohms
Sensitivity @ 1KHz = 200 mVrms
Max. Voltage Input = 25 Vrms
CMRR
= > 40 db @ 1KHz,
ref. to input amplifier threshold.
Pulse Input (TTL compatible):
Input Impedance
= 2K ohms
Min. Pulse Width
= 10 Ms
Logic 0
= V in < .5V
Logic 1
= V in > 1.5V
(+ 12 VDC @ 50mA supplied for
powered sensors)
Frequency Range: Upper limit 30 KHz.
Lower limit software selectable 10 Hz to
.0625 Hz.
Power Supply
Environmental
Output
Vibration: Designed to meet MIL810C, Method 514.2, Procedure VIII,
Figure 514.2-6. Curve V (1.5 g’s 10-200
Hz).
120 Vac p10%, 50-60 Hz
24 Vdc (20-30 V)
15 watts maximum power.
Temperature: -10oC to 55oC
operating
-40oC to 80oC storage
Relay Output: Two SPDT relays, 6A
@ 28 Vdc or 240Vac, 170 W or 1800 VA.
Selective relay logic: Energize or deenergize above or below setpoint. Autoreset at setpoint with programmable
frequency hysteresis 00.0% to 99.9% or
with time delay hysteresis selectable 000
to 999 data acquisitions. Latching relay
at setpoint with remote reset.
Response: 50 millisec. updates above
100 Hz. See manual for updates between 20 and 100 Hz, one cycle below
20 Hz.
Shock: Designed to meet MIL-810C,
Method 516.2, Procedure I, Figure
516.2-2 for ground equipment (30 g’s
half sine).
Enclosures Available: NEMA 1 STD,
NEMA 4X and Explosion Proof.
Humidity: 90% relative and noncondensing.
Constant Storage: Retained in EAROM
and may be altered 1000 or more times.
Accuracy: p0.05% for relay setpoints in
operation over temperature range.
Electrical References: Circuit common
is isolated from AC power, AC ground
and case. DC power is referenced to
circuit common. Passive inputs are balanced. Active sensor inputs are referenced to circuit common.
Electrical Connections
]
TB1 -1 K1 NC
-2 K1 COM
-3 K1 NO
-4 K2 NC
-5 K2 COM
-6 K2 NO
-13 AC Power
-14 AC Power
-15 Earth
Relays shown deenergized. Contact
rating: 6A max. at
28 Vdc or 6A max.
at 240 Vac.
TB2 -1 + 24 Vdc In
-2 DC Common
-3 Calibrate (when tied to +12V)
-4 DC Common
-5 + 12Vdc Out (50mA max.)
-6 Relay reset (when tied to + 12V)
-7 Signal +
-8 Signal -9 Shield
8
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Heat sink
chamber wall
Terminal block 2,
signal inputs,
DC power input/
output
Terminal block 1,
AC power inputs
and relay outputs
2 Relays
Pushbuttons:
(2) to select the
type & value for
a particular
instrument
constant
AC Power
supply area
Internal display: to indicate
instrument constants when
programming
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Dimensions in inches and (mm).
(800) 576 -6308
9
TACH•PAK® 3
Digital Process Tachometer
CSA Listed
Part Number Series T 77430
Faster - More Accurate - Field
Programmable
The Tach•Pak 3 computing
tachometer is a single channel
instrument. It measures input frequency and converts the resulting
quantities to a meter output, an
analog output and four relays.
The microcomputer-based
Tach•Pak 3 tachometer uses adaptive period averaging which permits a
combination of fast response and
high accuracy not available in other
industrial speed instruments. The
instrument functions can easily be
programmed in the field or altered at
any time using a unique internal
switch design.
Typically, a Tach•Pak 3 tachometer is used with magnetic sensors as
a signal source. However, it may
receive a sine wave or TTL signal
from any frequency source. The
resulting speed is used for meter
output, analog output or alarms. It is
superior in applications requiring fast
update times and high accuracy.
It is the customer's responsibility to
determine whether the product is
proper for customer's use and
application.
10
Features & Advantages
Quicker Response Time - 50 millisecond updates above 100 Hz.
Higher Level of Accuracy - p.5% for
analog outputs and p.05% for relay
setpoints in operation over
temperature ranges.
Field Programmable - Adaptable to
various applications and requirements by utilizing a unique internal
switch design. No additonal
calibration equipment required.
Digital Configuration - Utilizes adaptive period averaging and floating
point calculation.
2 Analog Current Outputs - 0-1
milliamps. 0-20 or 4-20 milliamps.
4 Relays - Sealed 6 amp SPDT auto
reset or latching.
AC or DC Power - Adaptable to either
AC or DC power source.
Ordering P/N
Input Power
T77430 -11
-12
-41
-42
-71
-72
120 Vac/24 Vdc
240 Vac/24 Vdc
120 Vac/24 Vdc
240 Vac/24 Vdc
120 Vac/24 Vdc
240 Vac/24 Vdc
**
*
Applications
• Fast response overspeed
shutdown
• PLC or DCS Interface
• Petrochemical production
• Pump or generator alarm
• Low speed tachometer
• Expanding analog scale speed
transmitter
• Start-up, over/under speed
switching
• Textile production applications
• RPM measurement
• Paper and pulp production
• Turbine speed control input
• Metal production
• Mining applications
• Frequency measurement
• Test labs
• Generator sets
• Food processing
• Conveyor protection
• Printing industry
Enclosure
Standard NEMA 1
Standard NEMA 1
NEMA 4X *
NEMA 4X *
Explosion Proof **
Explosion Proof **
See page 16 for dimensions
See page 17 for dimensions
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Net Weight
(lbs.)
2.7
2.7
5.9
5.9
39.0
39.0
Specifications
Signal Input
Type: Software selectable for passive or
active sensors & terminal block jumper
for active sensors.
AC Input (sine wave):
Input Impedance
= 2K ohms
Sensitivity @ 1KHz = 200 mVrms
Max. Voltage Input = 25 Vrms
CMRR
= > 40 db @ 1KHz,
ref. to input threshold.
Pulse Input (TTL compatible):
Input Impedance
= 2K ohms
Min. Pulse Width
= 10 Ms
Logic 0
= V in < .5V
Logic 1
= V in > 1.5V
(+ 12 VDC @ 50mA supplied for powered
sensors)
Frequency Range: Upper limit 30 KHz,
Lower limit software selectable 10 Hz to
.0625 Hz.
Power Supply
120 Vac p10%, 50-60 Hz
24 Vdc (23-30 V), std. 750 ohm analog
load or (20-30 V) with 600 ohm analog
load.
15 watts maximum power.
Outputs
Environmental
Meter Output 0 to 1.0mA p.5% of full
scale. True current 15 K ohm maximum.
Full scale selectable from .1 Hz to 30
KHz.
Analog filter (approx. 2 sec.) switch
selectable.
Analog Output: Selectable to 0 to 20 mA
or 4 to 20 mA, p.5% of full scale. True
current 750 ohm maximum.
Full scale and zero scale selectable .1Hz
to 30 KHz.
Analog filter (approx. 2 sec.) switch
selectable.
Relay Outputs: Four SPDT relays, 6A
@ 28Vdc or 240Vac, 170 W or 1800 VA.
Selective relay logic: Energize or deenergize above or below setpoint. Autoreset at setpoint with programmable
frequency hysteresis 00.0% to 99.9% or
with time delay hysteresis selectable 000
to 999 data acquisitions. Latching relay at
setpoint with remote reset.
Response: 50 milisec. updates above
100 Hz. See manual for updates between
20 and 100 Hz, one cycle below 20 Hz.
Temperature: -10 to 55 oC operating.
-40 to 80 oC storage.
Vibration: Designed to meet MIL-810C,
Method 514.2, Procedure VIII, Figure
514.2-6. Curve V (1.5 g’s 10-200 Hz).
Shock: Designed to meet MIL-810C,
Method 516.2, Procedure I, Figure 516.22 for ground equipment (30 g’s half sine).
Enclosure: Enclosed terminals, same
mounting holes as the 300 Tach with
enclosure 50% wider. NEMA 4X &
explosion proof enclosures optional.
Humidity: 90% relative and non-condensing.
Constant Storage:
Retained in EAROM and may be altered
1000 or more times.
Electrical References: Circuit common
is isolated from AC power, AC ground
and case. DC power, analog output and
meter output are referenced to circuit
common. Passive inputs are balanced.
Active sensor inputs are referenced to
circuit common.
Accuracy: p0.05% for relay setpoints in
operations over temperature range,
p0.5% of full scale for meter and analog
outputs.
Electrical Connections
]
TB1 -1 K1 NC
-2 K1 COM
-3 K1 NO
-4 K2 NC
-5 K2 COM
-6 K2 NO
-7 K3 NC
-8 K3 COM
-9 K3 NO
-10 K4 NC
-11 K4 COM
-12 K4 NO
-13 AC Power
-14 AC Power
-15 Earth
Relays Shown
De-Energized
Contact Rating:
6A Max. at 28Vdc
OR
6A Max. at 240Vac
TB2 -1 + 24 Vdc In
-2 DC Common
-3 Calibrate (when tied to +12V)
-4 DC Common
-5 + 12Vdc Out (50mA max.)
-6 Relay reset (when tied to + 12V)
-7 Signal +
-8 Signal -9 Shield
-10 Meter +
-11 Analog Common
-12 Analog +
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Heat sink
chamber wall
Terminal block 2, signal
inputs/outputs, DC power
input/output
Terminal block 1, AC power
input and relay outputs
Meter ouput
Full scale
adjusting
potentiometer
4 Relays
Analog
output
filter
dipswitch
Meter
output
filter
dipswitch
AC Power
supply area
Pushbuttons:
(2) to select the
type & value for
a particular
instrument
constant
Analog output
full scale adjusting
potentiometer
12
Internal display: to
indicate instrument
constants when
programming
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Dimensions in inches and (mm).
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TACHTROL® 3
Dual Input Digital Tachometer
Part Number Series T77310
The AI-Tek Tachtrol 3 computing tachometer is a single or dual
channel instrument. It measures
input frequencies and displays the
resulting quantities in RPM, FPM,
% Draw or other rates.
Measurement using the period
mode (time per event) permits a
combination of fast response and
high accuracy not available in other
industrial speed instruments. A
unique method of setting conversion
factors and instrument functions
permits it to be easily configured or
altered anytime during the instrument life.
•
•
•
•
•
•
Features & Advantages
• Single or dual channel
• 9 computed functions
• Measures speed or frequency
(2 Hz to 30,000 Hz)
• Adjustable normalization
• Active or passive sensor inputs
• Auto ranging LED display
• AC or DC power
• Panel mount DIN housing
A Tachtrol 3 unit is typically used
with magnetic sensors as a signal
source. However, it may receive a
sine wave or TTL signal from any
frequency source. The resulting
speed or computed function is used
for display, alarm or other transmission. It will be superior in applications requiring fast update times and
high accuracies. As this instrument
Ordering P/N
T77310 -01
-02
-11
-12
-21
-22
-41
-42
-71
-72
†
*
**
•
•
•
•
•
•
•
•
Function indicators
2 relay setpoints
4-20 mA, 0-20 mA outputs
0-10 Vdc, 0-5 Vdc output
RS232C serial output
Expanded and suppressed scale
analog outputs
Optional industrial housings
Easily re-configured
p.05% display and relay accuracy
100-200 millisec. response
Field adjustable conversion factors
MIL 810C vibration and shock
0-50oC operating temperature
Mixed output functions
Applications
Input Power
120
240
120
240
120
240
120
240
120
240
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Vac/24 Vdc
Net Weight
Enclosure
† Less Encl.
† Less Encl.
See page 18 for dimensions
See page 16 for dimensions
See page 17 for dimensions
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(lbs.)
]
For Explosion Proof
or NEMA 4X
Std. Panel Mount
Std. Panel Mount
Splashproof Panel Mount
Splashproof Panel Mount
NEMA 4X *
NEMA 4X *
Explosion Proof **
Explosion Proof **
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may be re-configured easily, it should
be used when scaling factors are
subject to change (requirement
changes, roll wear, etc.). Certain
constant settings produce outputs
very useful to very specific applications. Here are some examples:
• Fast response overspeed shutdown
• 2 Channel Speed/Draw Monitor
• Bi-directional Tachometer
• Reverse Rotation Alarm
• Low Speed Tachometer
• Clutch Slip Alarm
• Winder Control
• Ahead/Astern Marine Tachometer
• Expanded Analog Scale Speed
Transmitter
• Flow Rate Monitor
• Process Time Monitor
• Time per Event Monitor
• Autoranging Tachometer
• Computer Signal Conditioner
• Averaging Tachometer
• Line Frequency Monitor 60.00 Hz/
400.0 Hz
• RS232 Speed Transmitter
Inc,
3.3
3.3
2.6
2.6
2.7
2.7
4.5
4.5
39.0
39.0
It is the customer's responsibility to
determine whether the product is
proper for customer's use and
application.
13
(800) 576 -6308
Operation
The Tachtrol 3 unit may be
configured for measurement of a
single speed signal, two unrelated
speeds or a speed with direction
indication (from an AI-Tek bidirectional sensor). In addition, a
mathematical function may be
computed from two related input
signals. These computed functions
are:
•
•
•
•
Speed A
• (A + B)/2 (Average)
Speed B
• A-B (Difference)
A/B (Ratio)
• B/A (Inverse Ratio)
±A (Speed with direction)
• (A-B)/A x 100 (% Slip)
• (B-A)/A x 100 (% Elongation)
The Tachtrol 3 unit permits
independent assignment of any of
these functions to any output
(display, analog output and 1 or 2
setpoints). Additionally, the serial
digital ouput may report on any or all
outputs continuously or on setpoint
alarm. All forms of relay logic are
field selectable.
The Tachtrol 3 unit is supplied
with an electrically alterable read
only memory (EAROM) which
FIG. 1
FIG. 1 shows the CTW (constant
thumbwheel switch), the DTW (digit
thumbwheel switch) and the Pb (pushbutton)
by which each digit may be entered or
altered and a dip switch for selection of input
signal type for channel A or B. A battery is
not necessary to retain the programmed
constants. During normal operation, the
DTW may be used to display Speed A,
Speed B or the computed function.
Product Application
Guidelines
Analog output:Speed A
RS232C: Transmit all values.
Setpoint 1: A/B
one function for each output. Here are
the possibilities:
The part number specifies the
hardware. Individual requirements for
setpoints, scaling and functions may be
set into the instrument during installation. The following is a guide from
which data to be entered may be
supplied.
Input Frequency
Typically, an input frequency is
sensed from rotating gear teeth.
Frequency may be obtained from RPM
by the formula:
f (in Hz) = RPM x PPR
60
where PPR = pulses per revolution = no.
of gear teeth.
The normalization or scaling factor (SF)
to be specified may now be obtained for
each input by:
SF = DISPLAY VALUE (RPM,FPM, etc.)
INPUT FREQUENCY (Hz)
The desired form, as an example, is:
Input A: 2000 Hz = 800 FPM
Input B: 1600 Hz = 800 FPM
Outputs
The TACHTROL 3 can transmit any of
the 6 computed functions, speed A, or
speed B, or speed A with direction to
any of the 4 outputs. You may specify
14
contains all of the constants necessary to define the conversion factors
and instrument functions. These
constants can be individually
displayed and altered by a method
similar to the setting of a digital
clock.
By utilizing a microcomputer as
the heart of the instrument, response time is improved tenfold
over the traditional EPUT (events
per unit time) tachometry. Further,
this fast response time is attained
with no sacrifice in digital accuracy.
Outputs
Selective
Function
Function
Display
Analog
Relay 1
Relay 2
---------------------
Speed A
Speed B
A-B
±A (dir.)
A/B
B/A
(A + B)/2
(A - B)/A x 100
(B - A)/A x 100
If one of the outputs is not used, a tenth
function, coded O, may be specified,
turning the specific output off.
Analog Output
The zero and full scale for the analog
output can be programmed to normal or
expanded scale, such as:
4-20 mA = 0 to 900 FPM or
4-20 mA= 450 - 900 FPM
Serial Digital Output
The serial digital (RS232C) output may
transmit the value on the display, the
analog output value, the two setpoint
deviations or all four of these values.
They may be continuously transmitted or
transmitted on setpoint alarm.
An example of the outputs specified is:
Display: A/B
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Relays
Each relay may operate on Input A,
Input B or the computed function. They
may energize, de-energize, latch or
auto-reset at the setpoint. Hysteresis
(difference between setpoint value and
setpoint reset) is normally 5% but may
be specified for any value from 1% to
99% of setpoint.
A typical example for a Tachtrol 3
application is:
Input A: 2000 Hz = 800 FPM
Input B: 1600 Hz = 800 FPM
Display: A/B
Analog output: Speed A=0-900 FPM
=4-20mA
Setpoint 1: Energize at 1.00 ratio &
above with 1% hysteresis
Setpoint 2: Not used
Serial output: Transmit all values
continuously.
This specific example is intended as
a guide. The versatility of the Tachtrol 3
unit permits several approaches to
configuration. Unavailable information
may be omitted as it could be supplied
during installation. More detailed
information is available in the Tachtrol 3
Instruction Manual.
Inc,
(800) 576 -6308
3PECIFICATIONS
)NPUT3IGNALS
&REQUENCY
2 Hz to 30K Hz
0ASSIVE3ENSOR (sine wave):
200 mV to 25 Vrms standard 2D ohm
impedance, common mode rejection: 40
db, balanced input sensitivity measured
at 1K Hz.
!CTIVE3ENSOR (TTL): duty cycle 20 to
80%, DC sensor power is 12 Vdc @ 100
mA [will power two (2) zero velocity
sensors or one (1) bi-directional sensor].
"I$IRECTIONAL3ENSOR
One (1)
frequency input (TTL input A) and the
direction input (TTL Input B) from a bidirectional sensor. [High (+5v) indicates
positive direction, and only single speed
functions (Speed A) are useful when
connected in this operation mode.]
0OWER3UPPLY
120 Vac±10%, 50-60 Hz
24 Vdc (23-30 V) std. 750 ohm analog
load or (20-30 V) with 600 ohm analog
load. 15 watts maximum power.
4EMPERATURE
0 to 50°C operating
-40° to 80°C storage
(UMIDITY
90% relative and non-condensing
6IBRATION
Disigned to meet MIL 810C, method
514.2. Procedure VIII. Fig. 514.2-6.
Curve V (1.5 g’s. 10-200 Hz).
3HOCK
Disgined to meet MIL 810C, method
516.2. Procedure I Fig. 516.2-2 for
ground equipment (30 g’s. half sine).
$ISPLAYS
4 1/2 digit with minus sign & decimals
(positive direction indicated by no minus
sign).
Bright .56” Red LED
Fixed or floating decimal (3 places)
Number range ±0.000 to ±19999
Three (3) LED function indicator lamps.
/UTPUTS
!NALOG 0-20 mA or 4-20 mA, field
selectable, output consists of one
thousand 20 µA steps. 750 ohm load
maximum. Span pot-adjustable ±10%.
Zero and full scale set into memory in
engineering units.
0-10 Vdc or 0-5 Vdc output obtained by
selecting the 0-20mA mode and using a
resistor across the input of the receiving
instrument whose parallel combination
with the input resistance of the receiver
is 500 ohms or 250 ohms respectively.
3ERIAL$IGITAL RS232C compatible
transmit only ASCII. 300 baud. asynchronous with odd parity. 2 stop bits and
carriage return. Transmission format
selectable to transmit continuously or
on any setpoint alarm. Transmission
preceded by linefeed (Lf) and followed
by carriage return (Cr). Each value
consists of a space (Ø), a two (20 digit
identifier, a colon and a right justified (7)
character field of data (4 1/2 digit
number, sign and decimal) Plus (+) sign,
and leading zeros indicated by spaces
(bbb). The following are examples of
the four (4) type transmissions:
LfbDO: (display value) Cr
LfbAO: (analog output value) Cr
LfbS1: (SP 1 value) bS2 (SP 2 value) CR
(SP value = difference between
setpoint and actual)
LfbDO: -19.999bAC: b199.99bSP1: bbb999bSP2:bbb0.00Cr
2ELAY3ETPOINTS 2 relays standard,
SPDT, 6A @ 28 Vdc or 240 Vac, 170W
or 1800 VA. Selective relay logic:
Energize or de-energize above or below
setpoint, auto-reset with hysteresis
selectable 0-99% in 1% steps, latching
(reset by pushbutton located behind
front panel door).
%LECTRICAL#ONNECTIONS
!CCURACY (including temp. variations)
Digital ±.03% typical (±.05% max.) &
± 1 least significant digit
Analog ±.3% of range
2ESPONSE4IMES
$ISPLAY updated approx. every 1/2 sec.
based onlatest available input measurement(s).
3ERIAL/UTPUT Transmits each output
value in approx. 1/2 second based on
input measurements obatined at the time
each value is transmitted.
!NALOG2ELAY/UTPUTS
updated at a
variable rate depending on the frequency. the typical & maximum response
times are:
Above 100 Hz = 100 ms typical
200 ms max.
2 to 100 Hz = 2 cycles + 30 ms typ.
6 cycles + 30 ms max.
Below 2 Hz =Measurement considered 0
For values computed from both signal
inputs a new computed value is updated
each time either signal completes a
measurement.
2ANGEOF.ORMALIZATION (linear or
inverse only)
Input frequencies A & B may be normal-7
ized by a number from .5000 x 10 to
7
2.000 x 10
Normalization is entered in the form:
+-1XXXX
+-1XXXX
Additional display normalization range
±.001 to 19999.
#ONSTANT3TORAGE
Retained in EAROM and may be altered
1000 or more times.
%LECTRICAL2EFERENCES
Circuit Common is isolated from AC
power, analog and case.
DC power analog output and serial
output are referenced to circuit common.
Passive inputs are balanced. Active
sensor inputs are referenced to circuit
common.
0ANEL-OUNTING$IMENSIONS
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Tachtrol 3 Less Enclosure
Dimensions in inches and (mm).
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19
Speed Sensors
AI-Tek Instruments manufactures hundreds of different designs of speed
sensors. This catalog lists the standard units we developed, based on years
of design experience and knowledge, to provide you readily available products
to solve your sensor solution to your speed control or indication needs. Many
of the hundreds of AI-Tek speed sensors we produce are designed for special
applications which allows us to offer a highly versatile and flexible product line.
Designed to meet severe industrial, automotive and aerospace
environments, AI-Tek speed sensors, will provide reliable, around-the-clock
operation for many years under adverse conditions. Our design engineers
have paid particular attention to trouble areas such as vibration, shock, extreme
temperatures, wet, oily and corrosive atmospheres. Many of our speed sensors
are specifically designed for high temperature, high or low speeds, various
targets or for precise accuracy and timing applications. AI-Tek uses primarily
the three technologies of variable reluctance, magneto-resistive and Hall
effect to convert motion into an electronic signal. By selecting the best
technology for a specific application we can assure years of reliable
performance.
This catalog offers a variety of options readily available through our
distributors. If you cannot find a catalog item to meet your specific requirements, please contact your area distributor with your specifics; there is
probably an existing design which comes close to your requirements. As a
world leader in producing quality speed sensors, AI-Tek Instruments will
provide a superb price/performance ratio.
Passive Magnetic Sensors
Control and protection circuits have relied on variable reluctance technology for years. With few components and no moving parts, the passive magnetic speed sensors can provide a signal from the inside of an aircraft engine
at temperatures approaching 425oC or from the hub of an automobile wheel
at high shock and vibration. The advantages of these sensors are:
• High reliability
• Simple installation
• Long life due to no moving parts or contacts
• Self powered operation
• Wide variety of shapes and sizes
• Easy alignment
• Can be designed for almost any environment
Due to their flexibility, you will find AI-Tek variable reluctance sensors in
everything from low-cost consumer products to highly-accurate automotive
engine ignition systems to flight-worthy aircraft engine controls.
It is the customer's responsibility to determine whether the
product is proper for customer's use and application.
20
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Principles of Operation
The internal construction of the typical AI-Tek
variable reluctance sensor is a magnet, pole piece and
coil (See figure 1). A magnetic field (lines of flux)
extends from the magnet, through the pole piece and
coil out into the air space at the end of the sensor.
The return path of the magnetic field is from the air
space to the other end of the magnet. As a ferrous
object approaches the tip of the pole piece, the
magnetic field increases and then decreases as the
object moves away from the pole piece. The snap or
the rapid change in the magnetic field induces an AC
voltage signal in the coil. With an ideal target and
matching sensor, the induced voltage is in the shape
of a sine wave.
As can be seen, the generated frequency signal is
directly proportional to the number of ferrous objects
passing the pole piece per unit time. The amplitude of
the voltage output is proportional to the speed of the
ferrous objects passing the pole piece.
Many applications of AI-Tek magnetic sensors use
gears as targets. Typical sensor output wave forms
with various targets are illustrated in Figure 3. Testing
sensors with gears rather than other ferrous
discontinuities such as sprockets, keyways, boltheads,
etc. is because the output is predictable and
repeatable. See Figure 2 for commonly used gear
terminology.
Diametral Pitch = No. of Teeth + 2
Outside Dia. of Gear (in.)
The performance of a sensor can be easily
defined when using a gear for a target; it also allows
for estimated performance with alternate targets.
AI-Tek sensors are tested with AGMA standard gears;
the performance curves are included in this catalog.
AI-Tek Instruments differs from most sensor
manufacturers in the presentation of performance
curves and test parameters. Most existing data is
specified at a surface speed of 1000 in/sec and 0.005
in. air gap; we feel that a 0.030 in. air gap and 500 in/
sec. surface speed (1800 RPM motor with 5 to 6 in.
dia. gear) are more realistic parameters to specify
performance.
Figure 1 - Internal configuration of typical sensors.
Figure 2 - Common terms used in defining gears.
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Figure 3 - Generated voltage waveforms.
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Calculation of Output Voltage
Selection of the proper AI-Tek magnetic sensor
may require the calculation of sensor output voltage to
assure proper operation in your specific application.
To assist in this area, let us consider the following
typical application: Requirement is speed display with
overspeed and underspeed control as well as 4-20 mA
signal to a PLC. Speed range is 0-3600 RPM with low
speed set point at 300 RPM, available shaft diameter
for mounting a gear is 2.000 in. and a .030 in. air gap
is ideal.
You have selected a Tachtrol 3, P/N T77310-11,
with a 60T steel, split gear, P/N G79870-202-1901,
and you are considering to use sensor P/N 700851010-001. The question is if the sensor has enough
output voltage at 300 RPM.
We can list the following parameters:
a. Tachtrol 3: Load impedance - 2000 ohms
Sensitivity - 200 mV rms
b. Split gear: Outside dia. - 5.166 in.
D.P. - 12
No. of Teeth - 60
c. Sensor:
Standard output voltage - 40V (P-P) min.
Guarantee Point - 3.4V P-P min.
D.C. Resistance - 130 ohms max.
Typical inductance - 33 mH ref.
Step 1: Calculate surface speed of gear:
SS = RPM x Outside Dia. x P = 300 x 5.166 x 3.14
60
60
SS = 81 IPS
Step 2.: Determine Peak-to-Peak output voltage:
Referring to the performance curves of sensor P/N
70085-1010-001 the min. output voltage is approx.
0.3 V (P-P) at 81 IPS and 0.030 in. gap. It is a fact
that output voltage vs. surface speed is a near linear
function; therefore, another method of determining
output voltage is to set up a ratio using the guarantee point:
3.4V (P-P) = E E = .55V (P-P)
500 IPS 81
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Step 3: Correction for pitch:
For a 0.106 in. pole piece dia. and a 12 D.P. gear
the correction factor from Table A is 1.41. (See pg.
25.)
EC = .55 x 1.41 = .78 V (P-P)
Step 4: Converting to rms voltage:
Simply divide by 3, a method which is close enough.
(If the peak-to-peak output voltage is a sine function,
the divisor is 2 times the square root of 2 or 2.83).
EC = .78 w 3 = .26 V rms
Step 5: Correction for load:
The .26V or 260 mV rms sensor output voltage will
be divided across the impedance of the load and
sensor. The load impedance is 2000 ohms resistive.
The impedance of the sensor has a resistive and
inductive element. At low frequencies the inductive
element is very small and can therefore be disregarded, leaving the max. DC resistance of 130 ohms
for consideration.
The load correction factor (fL) can be expressed as:
(fL) = Z (load)
= 2000 = .94
Z (load) + Z (sensor)
2130
EC = .94 x 260 = 244 mV rms
The final adjusted value is 244 mV rms.
As stated earlier, the sensitivity or threshold of the
Tachtrol•3 is 200 mV rms at the stated conditions,
the selection of P/N 70085-1010-001 is acceptable.
If the final value of EC had been slightly less than
200 mV, a reduction of the air gap (from .030" to
.025") would boost the output above 200 mV.
If it should be determined that the required sensor
cannot be selected from the catalog models, the
best procedure is to compile a list of all your requirements and contact your area distributor to assist you
in the selection of the correct sensor.
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Passive Speed Sensors
5/8 – 18 FAMILY
Molded
Ordering Part #
Thread Length (A)
70085-1010-421
2.475
(62.87)
70085-1010-425
3.000
(76.20) -X4HD
70085-1010-424
4.493
(114.12)
(Select cable from group “A”, see index)
Performance Curves **
Specifications:
Output Voltage (Standard): 63 V (P-P)
Output Voltage (Guarantee Point): 4.9V (P-P)
DC Resistance: 250 ohms max.
Typical Inductance: 63 mH ref.
Output Polarity: Pin ‘B’ positive
Operating Temperature: -55 to +107o C
Net Weight: 5 oz. max.
Dimensions in inches and (mm).
28
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Passive Speed Sensors
1/4 – 40 FAMILY
General Purpose – High Temperature
Ordering Part # Thread Length (A)
(B)
70085-1010-024
.687 (17.45)
.313 (7.95)
70085-1010-472 * .687 (17.45)
.500 (12.70)
70085-1010-227 1.687 (42.85)
.313 (7.95)
Performance Curves
*
Specifications:
Output Voltage (Standard): 4.7 V (P-P)
Output Voltage (Guarantee Point): 0.4 V (P-P)
DC Resistance: 125 ohms max.
Typical Inductance: 5-12 mH ref.
Output Polarity: White lead positive
Operating Temperature: -73 to 232oC
Lead Length: 8 in (20.3 cm)
Cable Length: -472, 60 in (1.5 m) *
Net Weight: 2 oz. max.
"ASEDON$0'EAR
* Egress is a 2-conductor, AWG #26, shielded, Teflon cable, with 3.25" long shrink tubing over housing
AI-Tek Instruments, Cheshire, CT USA
and cable for extra protection. Extra locknut provided.
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AI-Tek Instruments, LLC
Side Look Sensor
Application:
Used for Speed Take Off
The Side Look Sensor (SLS) has been developed by
AI-Tek Instruments for Allison automatic transmissions for trucks ranging from light duty vans to overthe-road tractors. It is available for Allison AT, MT
and HT transmissions. The new SLS improves on
earlier designs developed for Allison to replace a
mechanical speed system.
The SLS is a variable reluctance device that provides electronic transmission speed inputs to
engine control systems and/or electronic dashboards. It mounts directly on the transmission and
employs a unique magnet configuration that
induces a magnetic field on the side of the sensor
in the path of the rotating transmission gear. This
system with its fewer mounting parts improves
reliability, reduces weight and conserves space
over the earlier designs.
Outline and Mounting Dimensions
The new SLS uses a molded, glass filled nylon body
to protect the sensor in harsh, truck-operating
environments. It replaces the old fly-lead design
with an integral standard Packard connector,
which eliminates the added extra connector cost of
the old design. It is available in single and dual
output versions.
The SLS is manufactured in the United States.
AI-Tek Instruments Distributors stock the SLS for
off-the-shelf maintenance, repair and overhaul
(MRO) requirements.
CONNECTOR MATES WITH
PACKARD #12162188
(USE PACKARD #12034413
SEAL PLUG FOR UNUSED
WIRE HOLES)
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PACKARD #12162188
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CONNECTOR MATES WITH
PACKARD #12162188
CONNECTOR MATES WITH
PACKARD #12162188
(USE PACKARD #12034413
SEAL PLUG FOR UNUSED
WIRE HOLES)
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Bi-Directional, Dual Channel, Hall Effect Speed Sensors
AI-Tek bi-directional, zero velocity sensors are selfcalibrating to the specific customer application and
provide two independent frequency outputs and a
direction signal output to indicate change in direction of
the sensed, ferrous target.
The bi-directional sensor can also be referred to as a
dual channel sensor since it utilizes two Hall effect
sensing elements, physically offset from each other.
Each element generates a single channel of target
information, identical in frequency and polarity, but
offset in the time domain (phase shifted). Special
circuits inside the sensor are designed to calibrate each
channel to its application target, then analyze these two
channels of information for a phase lead / lag condition.
The direction output will then provide a logic 1 level
for clockwise or a logic 0 level for counterclockwise
rotation, assuming proper sensor orientation.
UL /CSA /ATEX
AI-Tek will be pursuing UL/CSA/ATEX approval for its
line of Bi-Directional, Dual Channel, Hall Effect speed
sensors.
Please contact Factory or Distributor for the status of
this approval.
It is the customer's responsibility to determine
whether the product is proper for customer's use and
application.
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Bi-Directional, Dual Channel, Hall Effect Speed Sensors
Cable
Connector (mates with)
Housing Material
Voltage**
Current
Output impedance
Outlook Logic levels
TTL
ST (Supply Tracking)
Direction logic
Output current
Frequency
Rise/Fall time
Duty Cycle
Channel phasing (quadrature)**
Gear pitch vs. airgap**
Operating temperature
Environmental
• Thermal Shock
• Salt Spray
• Humidity
• Dielectric Strength
• Insulation Resistance
• Vibration
• Shock
EMC
• Conducted emissions
• and susceptibility
• Radiated emissions and
• susceptibility
• Transients
5 conductor, 22 AWG irradiated cross-linked polyolefin
Bendix PT06W-10-6S or Souriau 851-06J10-6S50
300 series stainless steel
10 to 28 vdc
100mA max.
2.2K7
Logic 0
Logic 1
0.6 vdc. Max.
4.5 +/-0.5 vdc @ 5mA.
0.6 vdc. Max.
Vo=Vs(RL /RL+2.2K7)
Output high (logic 1) with direction of rotation towards notch
Source = 1.0mA max., Sink = 20mA max.
DC to 15KHz
5MS / 3MS typical
40% to 60%
45o to 135o
8 - 32DP, .005" - .080" air gap / 3.2 - .79Mod., 0.13 – 2 mm
-40oC to +125oC
Design principles consistent with “H” series Hall Effect
Sensors to withstand severe environmental stresses.
Design principles consistent with BS/EN and MIL-STD’s
for EMC hardness.
AI-Tek Instruments, Cheshire, CT USA
**Consult factory for application assistance.
TTL Compatible
Supply Tracking
(10–28VDC)
(10–28VDC)
Figure 1
Note:
Figure 2
Either output will work with any AI-Tek Tachometer.
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Bi-Directional, Dual Channel, Hall Effect Speed Sensors - 5/8 and 3/4 Threads
Bi-Directional, Hex Body with 6 Pin Connector
(A)
(B)
(C)
(D)
(E)
(F)
Ch. A out
Not used
Ch. B out
Direct. out
+ Supply power
DC Common
(Select cable from group “C” see index)
Part Num.
BH1512-001
BH1522-001
BH1512-002
BH1522-002
BH1612-001
BH1622-001
BH1612-002
BH1622-002
Thread
.625-18UNF-2A
.750-20UNEF-2A
“A” Dim.
“B” Dim.
“C” Dim. (max.)
1.500 (38.1)
3.375 (85.7)
3.875 (98.4)
2.750 (69.9)
4.625 (117.5)
5.125 (130.2)
1.500 (38.1)
3.375 (85.7)
3.875 (98.4)
2.750 (69.9)
4.625 (117.5)
5.125 (130.2)
Output
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
Red:
Blk:
Wht:
Org:
Grn:
Part Num.
BH1512-013
BH1522-013
BH1512-014
BH1522-014
BH1612-013
BH1622-013
BH1612-014
BH1622-014
48
Thread
.625-18UNF-2A
.750-20UNEF-2A
“A” Dim.
“B” Dim.
1.500 (38.1)
3.375 (85.7)
2.750 (69.9)
4.625 (117.5)
1.500 (38.1)
3.375 (85.7)
2.750 (69.9)
4.625 (117.5)
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Cable Length
10 ft. (3.05m)
Airpax
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+ Supply power
DC Common
Ch. A Out
Ch. B Out
Direct. Out
Output
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
Dimensions in inches and (mm).
Inc,
(800) 576 -6308
AI-Tek Instruments, Cheshire, CT USA
Bi-Directional, Hex Body with Cable
Bi-Directional, Dual Channel, Hall Effect Speed Sensors - 5/8 and 3/4 Threads
Bi-Directional, Round Body with Connector
Part Num.
BH1512-005
BH1522-005
BH1512-006
BH1522-006
BH1612-005
BH1622-005
BH1612-006
BH1622-006
Thread
“A” Dim.
“B” Dim.
1.500 (38.1)
3.375 (85.7)
3.875 (98.4)
2.750 (69.9)
4.625 (117.5)
5.125 (130.2)
.750-20 UNEF-2A 1.500 (38.1)
3.375 (85.7)
3.875 (98.4)
2.750 (69.9)
4.625 (117.5)
5.125 (130.2)
.625-18 UNF-2A
“C” Dim. (max.)
Output
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
Bi-Directional, Fully Threaded with Cable
Part Num.
Thread
BH1512-009 .625-18 UNF-2A
BH1522-009
BH1512-010
BH1522-010
BH1612-009 .750-20 UNEF-2A
BH1622-009
BH1612-010
BH1622-010
“A” Dim.
Cable Length
4.000 (101.6)
10 ft. (3.05m)
6.000 (152.4)
4.000 (101.6)
6.000 (152.4)
Output
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
TTL Compatible
Supply Tracking
Dimensions in inches and (mm).
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Airpax
Distributed By
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49
Connectors and Cable
Assemblies
AI-Tek stocks a selection of connectors
and cable assemblies for your convenience.
For ease of selection, the connectors and
assemblies are divided into groups. Group
“A” is designed for 2-wire items, Group “B”
for 3-wire.
Complete cable assemblies include the
connector and 10' of recommended wiring
for use with AI-Tek equipment. All wiring is
insulated, spirally wrapped in a tinned
copper shield and jacketed in long-lasting
PVC or polyolefin insulation. Alternate cable
length is available for special requests.
Group
A
B
C
A-I Tek P/N
Mil. Connect. No.
Max. Temp.
Cable Wiring
S
R
S
S
R
S
CN79860 -3100
-3800
MS3106A10SL-4S
MS3108B10SL-4S
125oC
125oC
Connector Only
Connector Only
-3000
CA79860 -01-00
-17-00
-06-00
MS3106A10SL-4S
MS3106A10SL-4S
MS3108B10SL-4S
MS3106A10SL-4S
182oC
80oC
80oC
182oC
Connector Only
2 #22 Black & Red
2 #22 Black & Red
2 #20 Black & White
S
R
S
R
S
S
CN79860 -2600
-3900
CA79860 -18-00
-24-00
MS3106A10SL-3S
MS3108B10SL-3S
MS3106A10SL-3S
MS3108B10SL-3S
125oC
125oC
125oC
125oC
Connector Only
Connector Only
3 #20 Red,White & Black
3 #20 Red,White & Black
CN79860 -4200
CA79861-30-00
MIL-C-26482
Bayonet Style
125oC
125oC
Connector Only
5#22 Red, Orange, Black,
White, Green
Net Weight: 5 oz. max.
Standard cable assemblies include 10ft. of shielded cable. For other cable length contact your local distributor.
S = Straight Connector
R = Right Angle Connector
It is the customer's responsibility to determine whether
the product is proper for customer's use and application.
50
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AI-Tek Instruments, Cheshire, CT USA
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Airpax
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Split Gears
When using an AI-Tek speed sensor in RPM measurement, split gears provide a convenient and simple
means of installation where shaft disassembly is not
feasible. The two halves of the gear are fastened with
clamping screws, thus assuring close fit. All split
gears are 12 diametral pitch, 14.5o pressure angle.
Solid Gear
AI-Tek also offers a 20 diametral pitch, 14.5o pressure
angle, solid steel gear. This gear can be rebored to fit
shaft diameters up to 1.375". It is secured to the shaft
with 2 set screws.
Note: Gears are supplied with minimum
bores as shown. Alternate bores within
the minimum and maximum limits are
available at additional cost.
Caution: Gears may shatter if not
installed to specifications or if operated
above maximum RPM.
Dimensions of Steel Split Gears
Part No.
G79870-202-1800
G79870-202-1901
G79870-202-2001
G79870-202-2101
G79870-202-2201
G79870-202-4233
Pitch
Dia., In.
O.D.
Inches
No. of
Teeth
4.000
5.000
6.000
8.000
10.000
15.000
4.166
5.166
6.166
8.166
10.166
15.166
48
60
72
96
120
180
Tooth
Overall
Std. Bore
Face, In. Length, In. Dia., In.
.312
.312
.312
.312
.312
.375
1.000
1.000
1.000
1.125
1.250
1.375
Max. Bore Approx. Max.
Dia., In.
Wt., Lbs. RPM
0.500
1.000
1.000
1.000
1.000
7.500
2.125
3.125
4.000
5.750
7.500
12.000
3.0
5.0
7.0
15.0
26.0
48.0
8400
5900
5900
4500
3000
2400
0.375
1.375
1.2
6000
Dimensions of Solid Steel Gear
G79870-202-0967
52
3.000
3.100
60
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.375
0.875
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Tachometer Transducers
AI-Tek tachometer transducers are self-generating units
when used with speed sensors. They are designed
primarily to provide an easy means of attaching a pulse
generating assembly to rotating shafts. Sensor gapping, shaft run-out and mounting problems are eliminated. This makes the unit especially useful for shafts
with high run-out. The ordering map on the following
page provides information for selecting a unit for your
particular application. Please note that sensors and
cable assemblies must be ordered separately.
Taper-Lock® Type
The assembly consists of aTaper-Lock bushing which
enables quick attachment to rotating shafts. The
transducer employs a rotor with small perforations
along its periphery; a permanently lubricated sealed
bearing; an outer ring and a reference rod which,
when clamped in position, prevents the outer ring
assembly from moving. The outer ring can
accomodate up to three speed sensors for use in
monitoring directions of rotation and speed.
Mechanical Specifications
Lubrication: Bearings are permanently lubricated; do
not use pressure washes or solvents.
Finish: Reference rod and outer ring are anodized
aluminum.
Reference Rod : 1/4" diameter, 6" long
Bearing Limits: 4000 RPM max. speed
Weight: 54 oz. (1.53 kg) max.
Sensor Mounting: 5/8-18 UNF-2A threaded hole std.
Electrical Specifications
Output Frequency: 30 pulses/rev. (1 Hz = 2RPM),
Standard; 60 pulses/rev. (1 Hz - 1RPM),
Optional.
Output Voltage: Depends on magnetic sensor used.
One turn of sensor controls 0.056 inches of air
gapbased on 5/8-18 UNF-2A thread. Normal gap
setting range from 0.005 to 0.020 inches.
Ambient Temperature: -30oC to +50oC
NOTE: Not for use in abrasive atmospheres.
Sleeve Type
The AI-Tek sleeve-type transducer assembly is
identical to the Taper-Lock type except that it provides
a sleeve bushing with two set screws for installation
purposes, allowing larger shaft sizes.
It is the customer's responsibility to determine
whether the product is proper for customer's use and
application.
54
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Airpax
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(800) 576 -6308
Sensor Mounting Brackets
Several types of brackets are available to facilitate
the mounting of AI-Tek speed sensors. Threaded
brackets for 3/8-24, 5/8-18 and 3/4-20 threads are
generally used with passive sensors with one locknut.
Active, zero- velocity sensors and passive, chisel-point
sensors that require specific alignment should be used
with unthreaded brackets and two locknuts.
Bracket material is non-magnetic, 303 stainless
steel; locknuts are also non-magnetic stainless steel or
plated brass.
Sensors and brackets should be attached to a
frame free of excessive vibration to prevent spurious
indications when the gear is stopped or turning at very
slow speeds. Refer to sensor specifications for proper
air gap and alignment with gear (target) rotation.
Caution: Too small an air gap, especially with excessive run-out, may cause the gear to
strike the sensor and make it inoperative.
Unthreaded Brackets
Threaded Brackets
Thread Size
Bracket
Part No.
646-310-0006
3/8-24 UNF-2B
5/8-18 UNF-2B
646-310-0007
3/4-20 UNEF-2B
646-310-0008
Net Weight: 4 oz. max.
One Turn
Advances
Thread Size
Of Sensor
Hole Diameter
Bracket
Part No.
.042"
.056"
.050"
3/8-24 UNF-2A
5/8-18 UNF-2A
3/4-20 UNEF-2A
.390"
.640"
.765"
646-140-0009
646-140-0010
646-140-0015
Dimensions in inches and (mm).
56
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Net Weight: 2 oz. max.
Airpax
Distributed By
Inc,
(800) 576 -6308
www.flw.com/airpax
Airpax
Distributed By
Inc,
(800) 576 -6308
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