manualshive.com logo in svg

TSI Incorporated VelociCalc 8345, Руководство по эксплуатации и обслуживанию

Поделиться
Скачать
TSI Incorporated VelociCalc 8345 Скачать руководство пользователя страница 37

 

Standard Velocity vs. Actual Velocity 

33

Example No. 1: 
 
You want to measure the actual velocity in a duct.  
The air temperature in the duct is 55°F and the 
pressure is 14.24 psia.  You take a measurement 
and the display reads 1200 feet per minute (ft/min). 
 

ActualVelocity

=

+

+







=

1200

460 55
460 70

14 7

14 24

1203 7

.

.

.

ft / min

 

 
Example No. 2: 
 
You need to measure the actual velocity in a 
plenum.  The air pressure is 99.4 kPa and the 
temperature is 27°C.  The display reading is 2.3 
meters per second (m/s). 
 

ActualVelocity

2.3    

=

+

+







=

273 27

273 211

101

99

2 39

.

.4

.4

.

/

m s

 

 

Содержание VelociCalc 8345

Страница 1: ...Model 8345 8346 8347 8347A VELOCICALC Air Velocity Meters Operation and Service Manual 1980277 Revision E November 2002 V e n t i l a t i o n T e s t i n g B a l a n c i n g ...

Страница 2: ......

Страница 3: ...sion E November 2002 U S INTERNATIONAL Sales and Sales and Customer Service Customer Service 800 874 2811 001 651 490 2811 651 490 2811 Fax Fax 651 490 3824 001 651 490 3824 SHIP MAIL TO E mail address TSI Incorporated answers tsi com 500 Cardigan Road Website Shoreview MN 55126 3996 USA www tsi com ...

Страница 4: ......

Страница 5: ...laced as a result of repair services are warranted to be free from defects in workmanship and material under normal use for 90 days from the date of shipment c Seller does not provide any warranty on finished goods manufactured by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies d Unless specifically authorized in a separate writing b...

Страница 6: ...ll be at Buyer s risk of loss and will be returned if at all at Seller s risk of loss Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY which contains the complete and exclusive limited warranty of Seller This LIMITATION OF WARRANTY AND LIABILITY may not be amended modified or its terms waived except by writing signed by an Officer of Seller Service Policy K...

Страница 7: ...ff Feature 6 Selecting the Display Units 6 Using The Telescoping Probe 7 Extending The Probe 7 Retracting The Probe 7 Articulating Probe Model 8346 8347A 8 3 Operation 9 Overview 9 Keypad Functions 9 ON OFF Key 9 Measuring Velocity 10 Measuring Temperature 10 Flow Rate Function 11 Entering Shape and Size 11 Humidity Function Model 8347 8347A 12 Entering Barometric Pressure 12 Time Constant Functio...

Страница 8: ...le Function 14 Statistics Function 15 Clear Function 16 Printer Port 16 4 Maintenance 19 Probe Tip 19 Recalibration 19 Cases 20 Storage 20 5 Troubleshooting 21 Appendixes A Specifications 25 B DIP Switch Settings 29 C Standard Velocity vs Actual Velocity 31 ...

Страница 9: ...or immediately Table 1 List of Components Qty Item Description Part model 1 Model 8345 VELOCICALC or Model 8346 VELOCICALC or Model 8347 VELOCICALC or Model 8347A VELOCICALC 8345 8346 8347 8347A 1 Carrying Case 8345 46 or Carrying Case 8347 47A 1319125 1319114 4 AA Alkaline batteries 1208013 1 AC Adapter Optional 115 V NEMA 5 230 V European CEE 7 16 230 V Great Britain 240 V Australian 2613033 261...

Страница 10: ...Chapter 1 2 Parts Identification 1 2 3 4 1 Keypad 2 Display 3 Printer Interface Port 4 Battery Access Cover ...

Страница 11: ... with alkaline batteries The VELOCICALC is designed to operate with either alkaline or NiCd rechargeable batteries Carbon zinc batteries are not recommended because of the danger of battery acid leakage The typical battery life for alkaline batteries at 20 C at 150 ft min is 10 hours Using the Optional AC Adapter The optional AC adapter allows you to power the VELOCICALC from a wall outlet When us...

Страница 12: ...nt will power off after 15 minutes if no keys have been pressed This feature can be turned off if desired by switching DIP switch 5 to the OFF position See Appendix B DIP Switch Settings Note Any samples taken will not be lost if the VELOCICALC automatically powers off Selecting the Display Units The VELOCICALC is capable of displaying the measured values in several different measurement units as ...

Страница 13: ...is facing upstream Extending The Probe To extend the probe hold the handle in one hand while pulling on the probe tip with the other hand Retracting The Probe To retract the probe hold the handle in one hand while pushing on the probe tip with the other hand If you feel the probe antenna binding pull gently on the probe cable until the smallest antenna section is retracted Collapse the rest of the...

Страница 14: ...g probe has the ability to bend at a 90 angle for those hard to reach places To bend the probe of the Model 8347A loosen the knurled nut on the joint bend the probe and tighten the nut To straighten the probe loosen the nut straighten the probe and tighten the nut ...

Страница 15: ...LC can compute statistics for groups of readings Keypad Functions When pressing the keys on the front panel the VELOCICALC will beep to confirm the function If you press a key and the VELOCICALC does not beep then the VELOCICALC does not allow that function during the selected mode The beep function can be disabled by changing the internal DIP switch refer to Appendix B ON OFF Key Press the ON OFF...

Страница 16: ...o Appendix B Place the end of the probe in the location where you want to make the measurement Make sure the sensor window is fully opened and the red orientation dot is facing upstream Measuring Temperature Press the TEMP key to display air temperature readings The VELOCICALC will display temperature readings in either degrees Celsius C or degrees Fahrenheit F depending on the DIP switch settings...

Страница 17: ...ATE key to put the VELOCICALC in flow rate mode The VELOCICALC will prompt the user to enter the shape and size if this has not been done since the instrument was turned on The VELOCICALC will request entry of the shape by alternately displaying the rectangle and the circle If shape and size have been entered the VELOCICALC will go directly to displaying flow rate Press the up and down arrow keys ...

Страница 18: ...imension and press either the ENTER or FLOWRATE key then select the Y dimension and press either the ENTER or FLOWRATE key To change the shape or dimensions after they have been entered press the up and down arrow keys ÏÐ Proceed as above to enter the shape and dimensions Humidity Function Model 8347 8347A Press the HUMIDITY key to toggle between displaying relative humidity dew point temperature ...

Страница 19: ...TANT key to view the current time constant To change the time constant press and hold the key The available time constant choices 1 5 10 15 and 20 seconds will sequence on the display When the desired value is displayed immediately release the key The VELOCICALC will always store the chosen time constant when the meter is turned off When the VELOCICALC is turned on again the last time constant is ...

Страница 20: ... is added to a sample buffer When the STATISTICS key is pressed the sum of the readings in the sample buffer is divided by the number of sampled readings to get the average The CLEAR key is used to clear out the sample buffer in order to start taking a new average Sample Function Press the SAMPLE key to start the sample The display will flash SAMPLE for one time constant and a number indicating th...

Страница 21: ...wer off by switching DIP switch 6 to the ON position See Appendix B DIP Switch Settings Statistics Function Press the STATISTICS key to display the average of the sampled values of the current operating mode The message AVERAGE will appear along with a number between 1 and 255 indicating how many sampled values were averaged The average value is then displayed for one second To keep displaying the...

Страница 22: ...velocity will also clear the flow rate Printer Port If the optional Portable Printer is connected the following will be printed While pushing the SAMPLE STATISTICS or CLEAR key the currently displayed data is transmitted to the printer port In flow rate mode shape and size data is also transmitted when it is entered or changed The value of the time constant is transmitted when it is changed The da...

Страница 23: ...uld result To remove dust blow it off with a gentle stream of air or rinse it off with a gentle stream of water To remove a combination of dust and oil rinse the probe tip in isopropyl alcohol and then blow it off with a gentle stream of air Be careful not to allow water to enter the articulating probe joint on the Model 8346 8347A Recalibration To maintain a high degree of accuracy in your measur...

Страница 24: ... is especially important in applications where strict calibration records must be maintained Cases If the instrument case or storage case needs cleaning wipe it off with a soft cloth and isopropyl alcohol or a mild detergent Never submerge the VELOCICALC Storage When storing the VELOCICALC for more than a month it is recommended to remove the batteries This prevents damage due to battery leakage ...

Страница 25: ...none of the solutions solves your problem please contact TSI Table 5 Troubleshooting the VELOCICALC Symptom Possible Causes Corrective Action No display Unit not switched on Switch on the unit Low or dead batteries Replace the batteries or plug in the AC adapter Dirty battery contacts Clean the battery contacts Battery symbol is blinking Batteries are low Replace or recharge batteries ...

Страница 26: ...w AC line voltage Correct the AC line voltage or use batteries Dirty battery contacts Clean the battery contacts Temperature initially reads high Temperature sensor is still warm from velocity mode Allow about 30 seconds before reading temperature Display reads ERR You are trying to enter more than 255 readings Read or record the average clear the sample register and proceed ...

Страница 27: ... flow is fluctuating Reposition the probe in a less turbulent section of the flow or use a longer time constant Display says OVER Velocity or temperature is too high Use an alternate measurement method Display flashes 888 8 Velocity or temperature is too high Use an alternate measurement method WARNING Remove the probe from excess temperature immediately excessive heat can damage the sensor ...

Страница 28: ......

Страница 29: ...ng or 3 ft min 0 015 m s whichever is greater TEMPERATURE Range 8345 46 0 to 200 F 17 8 to 93 3 C Range 8347 47A 14 to 140 F 10 to 60 C Resolution 0 1 F 0 1 C Accuracy3 0 5 F 0 3 C INSTRUMENT TEMPERATURE RANGE Operating electronics 40 to 113 F 5 to 45 C note deleted probe line here Storage 22 to 194 F 30 to 90 C VOLUMETRIC FLOWRATE Range4 0 1 to 195 000 l s 0 0424 to 702 000 m3 hr 0 2 to 2 700 000...

Страница 30: ...lution 0 1 RH WET BULB TEMPERATURE MODELS 8347 8347A Range 40 to 140 F 5 to 60 C Resolution 0 1 F 0 1 C DEW POINT MODEL 8347 8347A Range 5 to 120 F 15 to 49 C Resolution 0 1 F 0 1 C AVERAGING CAPABILITY Range Up to 255 values of each velocity or flowrate temperature humidity dew point temperature and wet bulb temperature TIME CONSTANT Range Adjustable from 1 to 20 seconds RESPONSE TIME To velocity...

Страница 31: ... 15 mm digit height POWER REQUIREMENTS Four AA size batteries included or AC adapter optional PRINTER INTERFACE Type Serial Baud Rate 1200 1 Temperature compensated over an air temperature range of 40 to 150 F 5 to 65 C 2 The accuracy statement of 3 ft min 0 015 m s applies to 30 ft min through 6 000 ft min 3 Accuracy with instrument case at 77 F 25 C add uncertainty of 0 05 F F 0 03 C C for chang...

Страница 32: ......

Страница 33: ...e battery compartment On the inside of the battery compartment there is a window with eight DIP switches The table below shows the functions for each switch Caution Make certain that power is turned off before changing DIP switch settings Figure B 1 DIP Switch Location DIP SWITCH ON OFF 1 8 ...

Страница 34: ...ting 5 Auto off disable Automatic power off Auto off disabled 6 Sample data Data lost on manual power off Data kept 7 Reserved Reserved Reserved 8 Beep Beep Disabled Beep Enabled The ON position is away from the batteries and OFF is towards the batteries Always leave DIP switch 7 in the OFF position To select flow rate to display l s or m3 hr DIP switch 1 must be in the ON position ...

Страница 35: ...erent values Standard velocity is the velocity the air would be moving if the temperature and pressure were at standard conditions It is usually the most useful measure of airflow because it defines the heat carrying capacity of the air Actual velocity is the velocity at which a microscopic particle of dust would be traveling if it were in the air stream In some instances actual air velocity rathe...

Страница 36: ... 14 7 Where T Ambient temperature in degrees Fahrenheit P Ambient pressure in psia If you use metric units the equation becomes ActualVelocity Standard elocity V T P m m 273 273 211 101 4 Where Tm Ambient temperature in degrees Celsius Pm Ambient pressure in kPa ...

Страница 37: ...4 24 psia You take a measurement and the display reads 1200 feet per minute ft min ActualVelocity 1200 460 55 460 70 14 7 14 24 12037 ft min Example No 2 You need to measure the actual velocity in a plenum The air pressure is 99 4 kPa and the temperature is 27 C The display reading is 2 3 meters per second m s ActualVelocity 2 3 273 27 273 211 101 99 2 39 4 4 m s ...

Страница 38: ...TSI Incorporated 500 Cardigan Road Shoreview MN 55126 U S A Web www tsi com ...

Отзывы:

Нет отзывов

Бренды по названию

Популярные бренды

Загрузить еще бренды