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ATI Technologies SmartTachSmartTach, User Manual

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PARAMETERS 

SmartTach Operating Manual 

 

Page 4-11 

09 - Pulses per Measurement 

Parameter Group:

  

Setup!

 

 

Range: 1-16 

Increment: 1 

Default: 1 

 

Purpose: 

This parameter is used to set the number of pulses to measure 

before updating the output.  This creates a rolling average of speed 

over the specified number of pulses. 

 

How to Set:  The default value of 1 is suitable for most applications.   This value 

should only be changed for very specific applications such as 

averaging the measurement over one crankshaft revolution or 

averaging over one camshaft revolution.  Setting this parameter 

equal to parameter two will let SmartTach average the 

measurement over two crankshaft revolutions.  This averaging helps 

eliminate ant noise caused by erratic timing variations. 

 

 

 

 

Summary of Contents for SmartTachSmartTach

Page 1: ...martTach SmartTach SmartTach Universal Speed Universal Speed Universal Speed Universal Speed Measurement Tool Measurement Tool Measurement Tool Measurement Tool USER MANUAL 47199 Cartier Drive Wixom M...

Page 2: ...form or by any means electronic or mechanical including photocopying recording or information storage or retrieval systems for any purpose other than the purchaser s personal use without the express w...

Page 3: ...Connection 2 4 Other Connections 2 4 Analog Output Connection 2 5 COM Port Connection 2 5 I O Port Connection 2 6 CONFIGURATION General Information 3 2 Operating Modes 3 2 Measure 3 2 Configure 3 3 De...

Page 4: ...age Limit 4 24 35 Analog Output Test Voltage 4 25 36 Analog Output Update Period 4 26 40 50 60 Range Output Function 4 27 41 51 61 Range Output Measurement Condition 4 29 42 52 62 Range Output Voltage...

Page 5: ...Voltage 6 5 Common Faults and Configuration Errors 6 6 Improper Setting of Input Conditioning Select 06 6 6 Improper Setting of Spark Input Threshold Level 10 6 6 Improper Input Polarity Setting 21 6...

Page 6: ...5 Figure 3 4 Parameter Edit Navigation 3 6 Figure 4 1 Parameter 2 Pulse Examples 4 4 Figure 4 2 Parameter 3 Pulse Examples 4 5 Figure 5 1 Normal Measurement Display 5 3 Figure 5 2 Maximum Value Displ...

Page 7: ...Chapter 1 Introduction Introduction Introduction Introduction...

Page 8: ...red SmartTach is ideally suited as an accessory to any data acquisition or dynamometer system It can act as an interface unit allowing engine RPM or Dyno Speed to be treated exactly the same as any ot...

Page 9: ...INTRODUCTION SmartTach Operating Manual Page 1 3 them We feel that customer participation is the ultimate way to providing the best possible products...

Page 10: ...ch This information is proprietary and confidential to Accurate Technologies Inc If you should have any comments regarding the organization of this manual please do not hesitate to contact us Technica...

Page 11: ...2350rpm Front Panel 10 30 VDC 10W Max SmartTach Universal Speed Measurement Tool DC POWER COM RS 232 TACH SENSOR I O PORT ANALOG OUTPUT PULSE INPUT Figure 1 01 Front and Rear Panels SmartTach Connect...

Page 12: ...the system does not function properly Always route all wiring cables away from hot sharp or moving components as well as ignition coils and spark plug wires All cables should be carefully and neatly...

Page 13: ...INTRODUCTION SmartTach Operating Manual Page 1 7...

Page 14: ......

Page 15: ...Chapter 2 Installation Installation Installation Installation...

Page 16: ...rule of thumb is the unit should not be installed anywhere where the temperature would be unbearable for a human The unit can be installed in a dynamometer cell provided that it will not be exposed t...

Page 17: ...als such as a Hall effect sensors Magnetic pickups or Encoder pulses are Trigger type signals In Trigger mode the input can accept signals up to 75V in Spark Mode the input can accept signals up to 1K...

Page 18: ...ked with their purpose to avoid accidental connection to the wrong inputs The can easily happen if the unit is removed and replaced Although the inputs are protected from damage unnecessary troublesho...

Page 19: ...e by using a digital voltmeter for the remote display COM Port Connection The SmartTach contains an RS 232 Serial Communications Port This port may be used by an external computer system to extract in...

Page 20: ...O port connection is an industry standard female high density 15 pin D SUB connector Cables and connectors for this port are available at most computer electronic component vendors or directly from A...

Page 21: ...Chapter 3 Configuration Configuration Configuration Configuration...

Page 22: ...hanges especially when only one parameter needs to be modified although requires knowledge of the parameter code numbers A more straightforward method is using an MS DOS based Personal Computer and th...

Page 23: ...mory Group Configuration Controls The SmartTach has four built in Pushbutton switches which serve several purposes one of which is to allow configuration of the unit The other purposes are described i...

Page 24: ...switch depends on the current operating mode The information below describes the function of each Pushbutton in each operating mode Sm artTach PULSE CONFIG ENTER MODE 2350rpm Measurement Mode Display...

Page 25: ...Conditioning parameter This procedure assumes that power has just been applied and no pushbuttons were depressed Default starting values for the parameters are also assumed 1250rpm Press ENTER Press...

Page 26: ...CONFIGURATION Page 3 6 SmartTach Operating Manual Figure 3 4 Parameter Edit Navigation...

Page 27: ...ut Level AutoT AnlOut 30 Analog Output Scaling 1000 31 Analog Output Offset 0 32 Analog Output Maximum Voltage Limit 10 00 33 Analog Output Minimum Voltage Limit 0 00 35 Analog Output Update Period 1...

Page 28: ...set 0 32 Analog Output Maximum Voltage Limit 10 00 33 Analog Output Minimum Voltage Limit 0 00 35 Analog Output Update Period 1 Configuration Example 4 Chassis dynamometer speed on a 48inch roll with...

Page 29: ...CONFIGURATION SmartTach Operating Manual Page 3 9...

Page 30: ......

Page 31: ...Chapter 4 Parameters Parameters Parameters Parameters...

Page 32: ...ter should be set to the type of measurement you want Selectio n Measurement EngSp Used to measure the number of revolutions over time Generally engine RPM but can be used to measure any rotating comp...

Page 33: ...d Parm 00 set to DynSp Hz kHz Frequency Parm 00 set to Freq ms us Period Parm 00 set to Per ms us Pulsewidth Parm 00 set to PW Duty Cycle Parm 00 set to Duty volts Aux Input Parm 00 set to Vaux Defaul...

Page 34: ...igger wheel with a missing tooth or an odd fire engine For these asymmetrical Patterns you would enter the number of times the pattern repeats itself per Cam revolution you will also need to enter the...

Page 35: ...l pulses that are input before the pattern repeats If the signal is not a pattern type this parameter should be set to 1 Examples 1 Cam Revolution or 1 Dynometer Roll Revolution A B C Figure 4 2 Param...

Page 36: ...1mm Dyno Speed Parm 00 set to DynSp Purpose This parameter is used set the number of pulses for a given distance or the dynamometer roll diameter This parameter is required if the SmartTach is in vehi...

Page 37: ...ed Parm 00 set to VehSp in Dyno Speed Parm 00 set to DynSp Purpose This parameter is used set the distance for a given number of pulses or the measurement units used for the dynamometer roll diameter...

Page 38: ...TachSensor It must also be set to TRG when connecting to any pulse type signals such as a Dyno encoder or crankshaft position sensor When connecting SmartTach to the Ignition Module Trigger signal be...

Page 39: ...arameter Group Setup Range 0 255 Increment 1 Default 0 No Filtering Purpose This parameter controls the low pass filter on the pulse input How to Set The default value should be adequate for most case...

Page 40: ...e cylinder found on some engines with Multi strike ignition systems How to Set This parameter should be set to Off unless connected to a Multi Strike type ignition system When connecting to the primar...

Page 41: ...the specified number of pulses How to Set The default value of 1 is suitable for most applications This value should only be changed for very specific applications such as averaging the measurement o...

Page 42: ...g of the front panel PULSE LED is noticed For the absolute maximum measurement accuracy this parameter should be set as low as possible keeping in mind that if the setting is too low too sensitive the...

Page 43: ...noise from the high voltage inductive pickup and coil negative signals How to Set For most applications this parameter should be set to the default value of 3 0 milliseconds If the period of the puls...

Page 44: ...atibility with virtually all types of sensors and input signals How to Set When using the TS1 TachSensor this parameter should be set to TS1 for most other applications this parameter should be to Aut...

Page 45: ...Input should be determined beforehand This information may be available from an engine service manual or actually measured with an oscilloscope In general the faster straighter the edge the more accur...

Page 46: ...is parameter is enabled the SmartTach effectively applies a divide by five Attenuator to the input signal This also places approximately a 12Kohm resistive load across the input How to Set For most ap...

Page 47: ...this parameter is enabled the equivalent of a 1000 ohm resistor is placed between the input and an internal 5 volt power supply How to Set This parameter should only be enabled if the input is used w...

Page 48: ...is defined as the input signal voltage level at which the Trigger event is acknowledged The direction of the voltage rising or falling must correspond to the Trigger Input Polarity setting How to Set...

Page 49: ...g of the Hysterisis level This should only be done for special circumstances This parameter may be automatically set for certain Trigger Input Signal Level options If the Trigger Input Level is set fo...

Page 50: ...analog output voltage The default is appropriate for most uses In normal mode the analog output voltage corresponds to the measured voltage including any filtering How to Set This parameter should be...

Page 51: ...ignal This effectively adjusts the gain of the analog output voltage The maximum range of the output is 0 to 10 volts How to Set This parameter should be set in accordance with the input requirements...

Page 52: ...ro voltage output value This setting corresponds to the measured value for which the analog output voltage will be 0 volts How to Set This parameter should be set in accordance with the input requirem...

Page 53: ...output voltage limit of the analog output This can be used to effectively clamp the maximum analog output voltage to accommodate external device inputs which cannot accept the full range of the analog...

Page 54: ...utput voltage limit of the analog output This can be used to effectively clamp the minimum analog output voltage to accommodate external device inputs which cannot accept the full range of the analog...

Page 55: ...r to manually set the voltage to any level throughout the range Accuracy of 0 005 volts How to Set The Analog Output Test Voltage function is enabled when this parameter is selected The output voltage...

Page 56: ...output This corresponds to the interval at which the SmartTach will update the analog output voltage from the most recently measured and filtered value How to Set For most applications this parameter...

Page 57: ...unctionality of the selected range output SmartTach provides three separately configurable Range Outputs The Range Outputs are isolated contact closures available at the I O connector How to Set This...

Page 58: ...PARAMETERS Page 4 28 SmartTach Operating Manual True False On True True On...

Page 59: ...hree separately configurable Range Outputs These Range Outputs are isolated contact closures available at the I O connector How to Set This parameter should be set to the type of measurement you want...

Page 60: ...ly configurable Range Outputs These Range Outputs are isolated contact closures available at the I O connector How to Set This parameter should be set to the type of measurement you want Examples Sett...

Page 61: ...rpose To assign a value to user variable A for use in range output control This value is in engineering units and the position of the decimal point may vary How to Set For the range output to function...

Page 62: ...rpose To assign a value to user variable B for use in range output control This value is in engineering units and the position of the decimal point may vary How to Set For the range output to function...

Page 63: ...5 08 volts Increment 0 02 volts Default 0 00 volts Purpose To assign a value to user variable C for use in range output control How to Set For the range output to function properly this parameter mus...

Page 64: ...5 08 volts Increment 0 02 volts Default 0 00 volts Purpose To assign a value to user variable D for use in range output control How to Set For the range output to function properly this parameter mus...

Page 65: ...est the range output circuit by allowing the operator to manually switch the output on and off How to Set The Range Output Test State function is enabled when this parameter is selected The output sta...

Page 66: ...ange 10 9999 milliseconds Increment 1 millisecond Default 10 milliseconds Purpose This parameter is used to set the time interval between reading the voltage on the Aux input How to Set Adjust this va...

Page 67: ...o Filter the analog input voltage How to Set Generally filtering of the analog input voltage is not required If you are experiencing false triggering of the range outputs there may be noise on the ana...

Page 68: ...Operating Manual 80 Display Brightness Parameter Group Disply Options 13 20 27 40 53 80 100 Default 40 Purpose This parameter is used to set the brightness of the SmartTach display How to Set Set thi...

Page 69: ...millisecond Default 250 milliseconds Purpose This parameter is used to adjust the time interval between updates to the SmartTach display How to Set The default value should be sufficient for most appl...

Page 70: ...BAUD Purpose This parameter is used to set the baud rate of the RS 232 serial port How to Set This parameter should be set to the baud rate of the computer device to which the serial RS 232 communicat...

Page 71: ...f Handshake disabled Purpose This parameter is used to enable hardware DSR DTR handshaking for RS 232 serial communications How to Set This parameter can be left in the default setting Handshake disab...

Page 72: ...mode will track the high peak level of the input signal both up and down The peak hold mode can be selected by pressing the ENTER Pushbutton The arrow symbol will flash This mode will display and hol...

Page 73: ...e mode will track the high peak level of the Reference signal both up and down The peak hold mode can be selected by pressing the ENTER Pushbutton The arrow symbol will flash This mode will display an...

Page 74: ...tic parameter is used to display the current power supply input voltage at the SmartTach PWR connector The accuracy of this measurement is typically 0 02 volts How to use The Power Supply Input Voltag...

Page 75: ...gnostic parameter is used to display the current input voltage at the SmartTach Aux Input connector The accuracy of this measurement is typically 0 5 volts How to use The Auxiliary Input Voltage can b...

Page 76: ...Operating Manual F0 Load Parameters from Memory Parameter Group Memory Purpose To load a previously saved set of parameters from one of the six user memory locations How to use Select the saved param...

Page 77: ...age 4 47 F1 Save Current Parameters to Memory Parameter Group Memory Purpose To store the current settings in one of the six user memory locations How to use Select the memory location that you would...

Page 78: ...ose To restore the current settings to their default values How to use This function may help correct measurement problems by returning all settings to their default values All parameters will need to...

Page 79: ...PARAMETERS SmartTach Operating Manual Page 4 49...

Page 80: ......

Page 81: ...Chapter 5 Operation Operation Operation Operation...

Page 82: ...pendent of the Range Outputs When this feature is active the measurement units will be replaced with max and min This feature is useful to observe the maximum minimum values attained during transients...

Page 83: ...splay Min Input Value Display Max Input Value ENTER Toggle Display On Off MODE Enter Configuration mode Figure 5 1 Normal Measurement Display Sm artTach PULSE CONFIG ENTER MODE 4952Max Max Value Displ...

Page 84: ...programmable through the configuration parameters The update rate of this output is also programmable This allows the analog output to be tailored to the requirements of the instrument receiving the...

Page 85: ...4 contains complete descriptions of all Range Output Parameters Range Output Example 1 This configuration will cut power to the engine controller if the measured rpm exceeds the user specified limit o...

Page 86: ...or Range Output 2 A B Aux Inupt Figure 5 5 Range Output Overspeed Low Oil Pressure Parameter Settings Parameter Group Parameter ID and Description Parameter Value Range1 40 Range1 Output Function ifN...

Page 87: ...Chapter 6 Troubleshooting Troubleshooting Troubleshooting Troubleshooting...

Page 88: ...is the best method for avoiding problems Prior to tracking sensor wiring installation problems we recommend that ALL of the configuration parameters be double checked to insure that they are correctly...

Page 89: ...TROUBLESHOOTING SmartTach Operating Manual Page 6 3 erratic operation may result If none of these faults exist please contact us for assistance...

Page 90: ...d for application see Common Faults and Configuration Errors section for details Incorrect Value Displayed This indicates an improper configuration If the error is consistent in magnitude the source o...

Page 91: ...ark plug wire has the lowest resolution in the ignition system The coil wire or using the TachSensor on the coil power feed may produce better results If the measurement source has more than 1 pulse p...

Page 92: ...ttings of these parameters may result in incorrect measurements The polarity should always be set to edge of the signal which has the greatest slope either positive or negative Incorrect Setting of Pa...

Page 93: ...TROUBLESHOOTING SmartTach Operating Manual Page 6 7...

Page 94: ......

Page 95: ...Warranty Warranty Warranty Warranty...

Page 96: ...ether express implied or arising by operation of law trade usage or course of dealing are hereby disclaimed Limitation of Remedy The liability of Accurate Technologies Inc arising from or in any way c...

Page 97: ...Appendices Appendices Appendices Appendices...

Page 98: ...riod 3 0 TrgInp 20 Trigger Input Level AutoT 21 Trigger Input Polarity Neg 22 Trigger Input Attenuator AtOff 23 Trigger Input Internal 5V Pull Up PuOff 24 Trigger Input Threshold Level Auto 25 Trigger...

Page 99: ...63 Range Output 3 A Value 0 64 Range Output 3 B Value 0 65 Range Output 3 C Value 0 00 66 Range Output 3 D Value 0 00 67 Range Output 3 Test State Off AnlInp 70 Analog Input Update Period 10 71 Analo...

Page 100: ...APPENDICES Page A 4 SmartTach Operating Manual...

Page 101: ...d Isolated from Input Ground Pulse Input Connector Type BNC Connector Industry Standard Pin Description Center Pulse Input Signal 75Vdc in Trigger mode 1KV In Spark Mode Housing Pulse Input Ground Iso...

Page 102: ...inal B 5 Range Output 3 terminal B 6 Isolated Ground Shield 7 Isolated Ground 8 Range Output 1 terminal A 9 Range Output 2 terminal A 10 Range Output 3 terminal A 11 Reserved Do not connect to this pi...

Page 103: ...rless and coil on plug ignition systems The TS1 TachSensor is designed for engine RPM measurement and is not recommended for Duty cycle and Pulsewidth measurements IP1 Inductive pickup The IP1 is a hi...

Page 104: ......

Page 105: ...24 35 Analog output test 4 25 36 Analog output update 4 26 Aux input Connections 2 6 Auxiliary input Input monitor 4 44 C Com port Connector pin outs A 4 Configuration 3 2 3 8 Controls 3 3 3 4 Default...

Page 106: ...tion A 6 InpMon A0 Trigger input high peak 4 41 A1 Trigger input low peak 4 42 A2 Power supply 4 43 A3 Auxiliary input 4 44 Input monitor Parameters 4 41 4 44 See InpMon Installation 2 2 2 6 M Memory...

Page 107: ...64 B value 4 31 65 C value 4 32 66 D value 4 33 67 Test state 4 34 Range outputs Connections 2 6 Examples 5 5 5 6 Parameters 4 27 4 34 See Range1 Range2 Range3 Using 5 4 5 6 S Serial 90 Baud rate 4 3...

Page 108: ...INDEX Page I 4 SmartTach Operating Manual Configuration errors 6 5 U Unit placement 2 2 W Warnings 1 5 Warranty 7 2...

Page 109: ......

Page 110: ...INDEX Page I 2 SmartTach Operating Manual...

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