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HyQuest Solutions Pty Ltd

 

Point Velocity Display - Model PVD100 
© 

Copyright 

   

35

 

 

 

 

Issue 1.00   4 Apr, 2007 

Appendix A    Capturing a Spin Test 

 

The spin test function allows the user to perform a simple spin test of the meter.  The 

PVD100

 outputs a character string representing the meter count and elapse time.  Whenever 

the ‘spin test’ measurement begins, the 

PVD100

 will output through the serial data port a 

character string at every contact closure.  This character string is of the following format: 

  nxxx,tttt[cr][lf] 
 

 

preamble for indicating contact closure data 

xxx 

number of meter contact closures, transmitted in decimal    

 

 

 

(i.e. 001, 002, 003, etc) 

 , = 

delimiter 

 

 

tttt 

counts of elapse time measured as 0.00666 second counts 

 

 

 

 

(150 Hz), transmitted in HEX ASCII (i.e. 0-9,A-F) 

 [cr] 

carriage 

return (ASCII ‘0D’)  

 

 

[lf] 

line feed (ASCII ‘0A’)  

 

At the end of the spin test, the 

PVD100 

sends a final data string that displays the total number 

of counts and total time all shown in decimal notation.  This format makes it easy to copy the 
final total number of counts and total elapse time information onto a form.  Total time is 
given in seconds and displays the time to a tenth of a second.  The format is shown below. 

  dxxx,ttt.t[cr][lf] 

 

preamble for indicating spin measurement data in decimal 

 

 

xxx 

number of meter contact closures, transmitted in decimal 

    (i.e. 

001, 

002, 

003, 

etc) 

 , = 

delimiter 

 

 

ttt.t 

total seconds of elapse time displayed to a tenth of a second  

 [cr] 

carriage 

return (ASCII ‘0D’)  

 

 

[lf] 

line feed (ASCII ‘0A’) 

 
Shown below is an example of both formats, as they would be displayed using the 

HyperTerminal 

program.    

 

N           

 

Perform ‘Spin Test’

 

n000,0000   

 

First contact closure 

n001,0013 
n002,0027 
n003,003A 
    . 

      . 

    . 
n162,427A 

n163,4607   

 

Final contact closure

 

n163,4736   

 

Data string when “Stop Spin” executed

 

d163,121.4  

 

Final meter counts and time (in seconds)  

A           

 

PVD100

 initialization completed

 

Содержание PVD100

Страница 1: ...9001 CERTIFIED OPERATING MANUAL PVD100 Current Meter Counter HYQUEST SOLUTIONS PTY LTD 48 50 Scrivener St Warwick Farm NSW 2170 AUSTRALIA Phone 61 2 9601 2022 Fax 61 2 9602 6971 Email sales hyquestso...

Страница 2: ...asurement Time 13 4 3 8 Bluetooth Communications 13 4 3 9 Calibrate 14 4 3 10 Comms Test 15 4 3 11 Dwell Measurement 16 4 3 12 Spin Test 17 4 3 13 Battery Condition 18 4 3 14 Meter Selection 19 4 3 15...

Страница 3: ...c to more than 6 1 m sec for a Price AA meter The PVD100 also provides a slow speed mode to improve measurements with extremely slow rotating current meters velocities less than 0 076 m sec The PVD100...

Страница 4: ...nce cat whisker contacts offer the poorest quality for marking and counting rotations The PVD100 offers 2 modes of operation i e NORMAL and SLOW speed mode NORMAL is selected for meter rotations 0 076...

Страница 5: ...in 9 provides an interface to other instruments that may use a current meter to perform velocity or flow measurements Examples include the JBS Instruments AquaCalc and Sutron s DMX Discharge Measureme...

Страница 6: ...lly shut off after 5 minutes of no activity i e no meter contact closures no serial port activity no button presses and Bluetooth switched off or in Discover mode SELECT This center located button is...

Страница 7: ...s selected The operating default power up setting is Magnetic Head The indicator also shows the operating mode If the indicator is not blinking then the operating mode is Normal If the indicator is bl...

Страница 8: ...cant number position will begin to show special characters such as or etc These characters indicate to the operator that a rollover count of 999 has occurred This display position shows the total elap...

Страница 9: ...n to stop the measurement at the next meter contact closure or the ON OFF button to simply stop and end the measurement This display position shows the indication of a current meter fault When the ind...

Страница 10: ...ay will show velocity to two decimal places while if the selection is set to METERS the display will show velocity to three decimal places Trick if you want to get more resolution in the display of fe...

Страница 11: ...ial Operating Functions Within the PVD100 are special operating functions that offer tools for adjusting the current meter and measuring its performance These special functions are described in order...

Страница 12: ...r contacts offer the poorest quality for marking and counting rotations 4 3 5 Normal Slow Use the FUNCTION button to select this menu then press SELECT to toggle between Normal or Slow Press ON OFF to...

Страница 13: ...protocol for communication Since the PVD100 can output data and be controlled using the RS 232 serial interface the physical cable connection can be eliminated using Bluetooth When the PVD100 is turne...

Страница 14: ...en The PVD100 will not automatically power down when Bluetooth is enabled and connected If Bluetooth is On or connected when the PVD100 is manually powered Off the PVD100 will go directly into DISCOVE...

Страница 15: ...an alternate ASCII character string This alternate character string represents the data string format that would normally be sent through the serial interface when making a current meter measurement T...

Страница 16: ...ontact head i e magnetic head or cat whisker head contact This is done from a different menu 2 After selecting the type of meter contact head when the DWELL measurement function is enabled the opening...

Страница 17: ...the first contact closure which is not counted the elapsed time counts begins Each following contact closure detected is counted and shown on the top line of the display The bottom line of the displa...

Страница 18: ...e STATUS indicator is turned On at a lower indication level to inform the operator that the PVD100 will not turn On until the batteries are changed This prevents poor operation from a low battery cond...

Страница 19: ...erial number and rating s To select a meter for the final velocity calculation use the Select button to bring the serial number into view then press ON OFF to return to the main display or press FUNCT...

Страница 20: ...meter B Press ON OFF to return to the main display or press FUNCTION to step to the next menu item In this display setting the computation of velocity for the real time display will use the first rat...

Страница 21: ...interface Command Function Performed S Start a measurement T Terminate the measurement I Abort the measurement R Resend the last data string U Buzzer ON Z Buzzer OFF H Speed Select set to Normal L Sp...

Страница 22: ...apsed time and velocity while the measurement is being performed At the end of the measurement interval or if the T command is received the PVD100 sends the last tally of accumulated counts and time i...

Страница 23: ...data display without a time limit The T or I command must be used to terminate the operation V The software version of the PVD100 is sent in the following manner vX X Example v1 0 4 4 1 Data Conversio...

Страница 24: ...d interval time is then used to compute the measured velocity For the Normal mode the 1 second output data format displays the accumulating time interval counts based on a 300 Hz sample rate The follo...

Страница 25: ...measurement To exit anytime from the User Serial Interface Program use the Esc key Step 1 Connect the PVD100 using the serial communications cable or Bluetooth connection If a Bluetooth connection is...

Страница 26: ...ons for the rating If the meter has been calibrated the calibration certificate will show the number of equations that describe the full rating for the meter Refer to Appendix D for an example of a ca...

Страница 27: ...onse to the Number of Equations entry For data entry position and control the following keys can be used The Space bar key moves the cursor position forward without changing the number The Backspace k...

Страница 28: ...g S will show the following results numbers shown are arbitrary and are for example A S N 1000 00 3 Ratings Range 1 n 1 23 2 3456 n 0 2345 Range 2 1 23 n 4 56 1 2345 n 0 1234 Range 3 n 4 56 2 3456 n 0...

Страница 29: ...e A S N 1000 00 if the user enters A or B S N 2000 00 if the user enters B Step 3 Edit the Serial Number then enter CR Carriage Return USIP response NUMBER OF EQUATIONS 3 Step 4 Enter 1 2 or 3 USIP re...

Страница 30: ...press CR USIP response 2 2 2048 n 0 0178 if the user enters 2 or 3 for Number of Equations or 3 0 9604 n 0 0312 if the user enters 3 for Number of Equations Step 6 Edit the final equation then press...

Страница 31: ...selections in the PVD100 are needed The selection of the meter type and turning the buzzer On and Off can all be done using the serial communications interface These functions can also operate using B...

Страница 32: ...this causes the PVD100 to power up with Factory Defaults If this occurs simply remove the batteries while the unit is On then replace the batteries All previous settings should be restored Please Not...

Страница 33: ...Velocity Flow absolute maximum 1 Normal Mode Price AA meter Mag 13 7m s 45 ft s 99o to 204o dwell CatW 6 7m s 22 ft s 10o to 62o dwell Pygmy meter CatW 2 8m s 9 4ft s 10o to 62o dwell Slow speed mode...

Страница 34: ...open drain O P Slow mode 1 Sec active high to low pulse Fixed width 1 NOTES a Measurements and Computations based on the following Rating Table Equations Price AA Meter V 2 2048 0 0178 where V Veloci...

Страница 35: ...end of the spin test the PVD100 sends a final data string that displays the total number of counts and total time all shown in decimal notation This format makes it easy to copy the final total number...

Страница 36: ...seconds to the total number displayed 3 The maximum number of measured meter contact closures clicks is 999 If the accumulating contact closures continues beyond the maximum data form the count rolls...

Страница 37: ...he Accessories folder listed in the Programs list on the desktop Within HyperTerminal and before spinning the meter select Capture Text found in the Windows label Transfer tab When the Capture Text ta...

Страница 38: ...ick Do not import column skip in the Column data format window This will show Skip in the column 1 heading 11 Click on column 3 where the Time data is shown in HEX ASCII and change in the Column data...

Страница 39: ...the response of a current meter created from data in a Spin Test file Spin Test for Meter 1234567 0 10 20 30 40 50 60 70 80 90 100 110 120 130 1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 9...

Страница 40: ...the following simple formula Dwell Angle Contact time x 360 Total Time The contact time and total time shown above in the formula are expressed in terms of the number of samples measured at a sample r...

Страница 41: ...s key row and is the left most character key in the row The character is a shift key character and the shift key must be used to send the character This echo character command acts like a switch which...

Страница 42: ...in meters per second Date 27 4 06 INSPECTED __________________ _____________________________________________________________ The above meter has been calibrated in accordance with AS 3778 6 3 1992 Thi...

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