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PARAMETERS  

Page 4-22 

 

SmartTach Operating Manual 

32 - Analog Output Offset 

Parameter Group:

  

AnlOut

 

 

Range: 0-9999 

Increment: 1 

Default: 0 

Note: 

Decimal place may vary with units, significant digits remain the 

same. 

 

Purpose: 

This parameter is used to set the engineering units at zero-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 

requirements of the device to which the analog output is 

connected.  The default setting of 0 degrees allows direct readout 

of RPM from the analog output voltage (shifting the decimal point 

right by three digits).  This allows the use of a remote voltmeter to 

display measured speed. 

 

Содержание SmartTachSmartTach

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 7: ...Chapter 1 Introduction Introduction Introduction Introduction...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 14: ......

Страница 15: ...Chapter 2 Installation Installation Installation Installation...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 21: ...Chapter 3 Configuration Configuration Configuration Configuration...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

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

Страница 30: ......

Страница 31: ...Chapter 4 Parameters Parameters Parameters Parameters...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 80: ......

Страница 81: ...Chapter 5 Operation Operation Operation Operation...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 87: ...Chapter 6 Troubleshooting Troubleshooting Troubleshooting Troubleshooting...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 94: ......

Страница 95: ...Warranty Warranty Warranty Warranty...

Страница 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...

Страница 97: ...Appendices Appendices Appendices Appendices...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 104: ......

Страница 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...

Страница 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...

Страница 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...

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

Страница 109: ......

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

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