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USER’S MANUAL

Model VT7

VISI-TACH® Multi-Functional

Digital Indicator

250-0257 rev 1.qxd  4/9/01  10:42 AM  Page I

Содержание VT6 Series

Страница 1: ...USER S MANUAL Model VT7 VISI TACH Multi Functional Digital Indicator...

Страница 2: ...without notice Minarik Corporation and its Divisions make no warranty of any kind with respect to this material includ ing but not limited to the implied warranties of its merchantability and fitness...

Страница 3: ...luding the provisions of the Occupational Safety and Health Act OSHA when installing equipment Reduce the chance of an electrical fire shock or explosion by proper grounding over current protection th...

Страница 4: ...ii...

Страница 5: ...5 Mounting 6 Shielded cable 7 Connections 8 Programming 9 Slide switch 10 DIP switches 10 Rotary DIP switches time base calculations 12 Application Examples 15 Mode 1 tachometer mode example 1 15 Mode...

Страница 6: ......

Страница 7: ...AC 10 50 60 Hertz 5 5 Watts Programmable Power Supply Output 5 VDC 50 mA 50 mA Regulated Source 4 12 VDC 25 mA 25 mA Unregulated Source 20 Operating Temperature Range 10 C 40 C Maximum Input Rate 2000...

Страница 8: ...2 Figure 1 Model VT7 115 and Model VT7 230 Multi Functional Digital Indicator Dimensions Dimensions...

Страница 9: ...er minute feet per minute etc It can also be used as a totalizer a rate monitor with a display of an inverse frequency or a rate mon itor with a time format in hours and minutes or minutes and seconds...

Страница 10: ...VT7 from dirt and moisture Provide adequate clearance for wiring and programming This takes place at the back of the unit Mount the VT7 away from other heat sources Operate within the specified ambien...

Страница 11: ...inal block The screw terminal block has a similar connection style to the one shown below Using a screwdriver turn the terminal block screw counter clockwise to open the wire clamp Insert stripped wir...

Страница 12: ...SI TACH through the panel opening and install the mounting bracket by engaging the two hooks on each bracket into the two slots on each side of the unit with the threaded end of the screws towards the...

Страница 13: ...an antenna and can pick up noise from other devices or other ground wires or voltage from power lines that can cause erratic operation Attach the shield to the COM terminal on the back of the VT7 or...

Страница 14: ...r the VT7 115 and 230 VAC for the VT7 230 2 Connect the pickup encoder or transducer on the terminals as indicated in the drawing below IMPORTANT To prevent possible interference do NOT run pickup enc...

Страница 15: ...r transducer or after the entire system is set up For easier handling it is usually more convenient to program the VT7 before it is set in the panel For access to the programming switches remove the t...

Страница 16: ...ure the DIP switches are set for optical encoder 1 on and 2 off decimal point 00 00 3 off 4 on and 5 off and tachometer mode 6 and 7 off Slide switch The position of the slide switch deter mines the p...

Страница 17: ...in which VT7 will oper ate use DIP switches 6 and 7 Mode 1 is the tachometer mode set 6 OFF and 7 OFF The tachometer mode displays the monitored shaft speed or a multiple of it The display can be fro...

Страница 18: ...itor mode min sec or hour min for mat set 6 ON and 7 ON In this mode the unit displays the number in time format This display can be used to read min utes and seconds or hours and minutes The display...

Страница 19: ...iver and set the pointer mark to the desired number The following application variables must be known before cal culating the time base t DDN The desired display number DDN is the known dis play value...

Страница 20: ...te monitor mode To calculate the time base in mode 3 use the equation below Mode 4 rate monitor mode min sec hour min format In this mode we must convert the DDN to an hours and min utes or minutes an...

Страница 21: ...speed of the motor directly Calculate the required time base Solution Using the equation on page 14 with arbitrary values of RPM 100 and DDN 100 the time base becomes 2 seconds This is the standard t...

Страница 22: ...Switch settings tachometer mode example one Application Examples 16 Fig 8 Tachometer Mode Example One DIP Switch Settings Fig 9 Tachometer Mode Example One Rotary DIP Switch Settings...

Страница 23: ...ave the VT7 display the speed of a belt which is mounted on the pulley in feet per second Find a The required time base t b The error due to rounding the time base c The display range in feet per seco...

Страница 24: ...Solution part b The error is calculated as follows 6 95 1 revolution minute 1 RPM 1 rev minute 1 RPM 2 r minute X 60 sec 1min X 12 inches 1 foot X 1 rev minute 1 RPM minute 60 sec 1min 12 inches 1 foo...

Страница 25: ...e display will range from about 0001 to 0059 feet per second Solution part d The error due to rounding may be decreased by increasing the display value by a factor of 10 and introduc ing a decimal poi...

Страница 26: ...reducing the error by a factor of 10 By placing DIP switch DP1 on the display will read 001 0 to 058 9 The error due to rounding could be decreased by further increasing the DDN by a factor of 10 agai...

Страница 27: ...Switch settings tachometer mode example two 21 Application Examples Fig 10 Tachometer Mode Example Two DIP Switch Settings Fig 11 Tachometer Mode Example Two Rotary DIP Switch Settings...

Страница 28: ...e display will count before rolling over Solution The output frequency is 250Hz The accumulated count is given by count rate time f time Solving this equation for time yields 40 seconds See page 23 fo...

Страница 29: ...Switch settings totalizer mode example 23 Application Examples Fig 12 Totalizer Mode Example DIP Switch Settings...

Страница 30: ...the length of the belt when the motor speed is 1000 RPM Calculate the required time base to display the time necessary in seconds for the components to travel the length of the belt Solution It is kno...

Страница 31: ...Switch settings rate monitor mode example 25 Application Examples Fig 13 Mode 3 Example DIP Switch Settings Fig 14 Mode 3 Example Rotary DIP Switch Settings...

Страница 32: ...will display the time taken in minutes and seconds for the process to complete It is known that it takes 3 minutes and 15 seconds to complete the process when the motor speed is 1000 RPM Calculate the...

Страница 33: ...Switch settings rate monitor mode min sec or hour min format example 27 Application Examples Fig 15 Mode 4 Example DIP Switch Settings Fig 16 Mode 4 Example Rotary DIP Switch Settings...

Страница 34: ......

Страница 35: ...lled C Limitations of Liability In the event of any claim for breech of any of the Corporation s obligations whether express or implied and particularly of any other claim or breech of war ranty conta...

Страница 36: ...Thompson Avenue Glendale California 91201 2011 Phone 818 502 1528 Fax 818 502 0716 www minarikcorp com Document number 250 0257 Revision 1 Printed in the U S A 5 98 North America 10 00 Outside North A...

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