TSI Instruments VelociCheck 8330 Скачать руководство пользователя страница 21 | Manualshive

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13

Chapter 4

Troubleshooting

Table 3 lists the symptoms, possible causes, and
recommended solutions for common problems
encountered with the V

ELOCI

C

HECK

. If your

symptom is not listed, or none of the solutions
solves your problem, please contact TSI.

Table 3: Troubleshooting the V

ELOCI

C

HECK

Symptom Possible

Causes

Corrective Actions

No display

Unit not
switched on

Switch on the unit

Low or dead
batteries

Replace the
batteries

Dirty

battery

contacts

Clean the battery
contacts

Batteries

installed
incorrectly

Check the battery
alignment against
illustration inside
battery cover

BAT

is blinking

Batteries are
getting low

Replace the
batteries

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Содержание VelociCheck 8330

Страница 1: ...Model 8330 VELOCICHECK Air Velocity Meter Operation and Service Manual August 2000 P N 1980066 Rev D ...

Страница 2: ......

Страница 3: ...Model 8330 VELOCICHECK Air Velocity Meter Operation and Service Manual August 2000 P N 1980066 Rev D ...

Страница 4: ...d Shoreview MN 55126 3996 USA MAIL TO TSI Incorporated P O Box 64394 St Paul MN 55164 0394 USA U S Sales and Customer Service 800 777 8356 651 490 2711 Fax 651 490 2874 INTERNATIONAL Sales and Customer Service 1 651 490 2711 Fax 1 651 490 2874 ...

Страница 5: ...red by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies c Unless specifically authorized in a separate writing by Seller Seller makes no warranty with respect to and shall have no liability in connection with goods which are incorporated into other products or equipment or which are modified by any person other than Seller The foregoi...

Страница 6: ... 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 Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers our service policy i...

Страница 7: ...CHECK Operation 3 Extending the probe 3 Measuring temperature 4 Measuring velocity 5 Switching on the power 6 Selecting temperature velocity display 6 Selecting the sensor response 7 Batteries 7 3 Maintenance 11 Probe tip 11 Cases 12 Storage 12 Service 12 4 Troubleshooting 13 ...

Страница 8: ... Constant temperature Thermal Anemometry Theory TI 105 Traversing a Duct to Determine Average Air Velocity or Volume TI 106 To obtain any of the listed Application Notes contact TSI at the following U S 800 777 8356 651 490 2711 Fax 651 490 2874 International 1 651 490 2711 Fax 1 651 490 2874 ...

Страница 9: ...ng functions Unpacking Carefully unpack the instrument and accessories from the shipping container Check the individual parts against the list of components in Table 1 if any are missing or damages notify TSI immediately Table 1 List of components Qty Item Part 1 VELOCICHECK Model 8330 8330 1 Carrying case 1319042 4 AA alkaline batteries 1208013 1 Operation and service manual 1980066 ...

Страница 10: ... the instrument Insert four size AA batteries in the battery tube according to the polarity indicated on the instrument case under the battery access cover Replace the battery access cover and tighten the screw If the batteries are installed incorrectly no damage to the VELOCICHECK will occur but the instrument will not function ...

Страница 11: ... flow for air velocity or temperature measurements grasp the tip of the probe and pull firmly To retract or collapse the probe simply push the tip of the probe straight toward the handle When you collapse the probe be sure to allow room for the cable to move freely out of the base of the probe Hindering the movement of the cable at the base of the probe will make it difficult to collapse the probe...

Страница 12: ...erature Switch the VELOCICHECK to the temperature mode before turning the instrument on This will minimize the time required for the temperature sensor to stabilize The temperature measuring sensor is in the window near the end of the probe Extend the probe and expose the sensor in the window to the air where you want to measure temperature When you measure temperature in moving air orient the win...

Страница 13: ...her flow This is because the probe assembly self heats at such low flows and must then re stabilize when placed into higher flow Fro best response time at velocities of 100 200 feet minute 0 5 1 meters sec it is recommended to first place the probe into the flow and then turn the meter on When the Model 8330 VELOCICHECK is in the velocity mode the temperature sensor will be warmed by heat from the...

Страница 14: ...e VELOCICHECK will begin to display velocity or temperature in the selected units Units available for display are standard feet per minute S ft min and degrees Fahrenheit F and standard meters per second S m s and degrees Celsius C depending on which instrument you purchased The units of measure cannot be changed in the field Selecting temperature velocity display The TEMP VEL switch on the instru...

Страница 15: ...ving the velocity measured each of the past 12 seconds into 12 separate locations in memory Every second a new reading is taken and the oldest reading is thrown out Depending on the position of the sensor response switch either the last 3 readings or all 12 readings will be averaged for display Batteries The VELOCICHECK is powered by four AA size batteries TSI ships the instrument with alkaline ba...

Страница 16: ...er left corner of the display will blink on and off This indicates a low battery condition and means that the batteries will soon need to be replaced Once the BAT indicator begins to blink you still have a few minutes to complete the measurements you are making While the indicator is blinking the VELOCICHECK continues to measure accurately If the battery voltage falls below 3 5 VDC the display wil...

Страница 17: ...do not install fresh batteries and the voltage falls below 2 volts the display will go blank Alkaline batteries are recommended for longest life and the VELOCICHECK battery life indicator will be most accurate with alkaline batteries ...

Страница 18: ......

Страница 19: ... VELOCICHECK must be switched off for cleaning Do not use high pressure air strong solvents or brushes to clean the sensor tip damage to the sensors could 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 Never u...

Страница 20: ... prevent damage due to batteries leaking Service To maintain a high degree of accuracy in your velocity measurements TSI recommends that you return your instrument to the factory for annual calibration For a nominal fee we will recalibrate the unit and return it to you with a certificate of calibration and NIST traceability This annual checkup assures you of consistently accurate readings it is es...

Страница 21: ...problem please contact TSI Table 3 Troubleshooting the VELOCICHECK Symptom Possible Causes Corrective Actions No display Unit not switched on Switch on the unit Low or dead batteries Replace the batteries Dirty battery contacts Clean the battery contacts Batteries installed incorrectly Check the battery alignment against illustration inside battery cover BAT is blinking Batteries are getting low R...

Страница 22: ...fluctuates badly The flow is fluctuating Reposition the probe in a less turbulent section of the flow or set the RESPONSE switch to SLOW Velocity reading blinks 4000 ft min or 20 32 m s The velocity exceeds 4000 ft min or 20 32 m s Use an alternate method to measure the velocity Sensor may be damaged Contact TSI Display indicates over 10 ft min 0 05 m s with probe retracted Sensor may be damaged C...

Страница 23: ... manufacturers may use different 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 airstream Because actual ai...

Страница 24: ...LOCICHECK by the following density correction factor Act Vel Std Vel T P 460 460 70 147 Where T Ambient temperature in F P Ambient pressure in psia If you use metric units the equation becomes Act Vel Std Vel T P m m 273 273 211 1014 Where Tm Ambient temperature in C Pm Ambient pressure in kPa Example No 1 You want to measure the actual velocity in a duct The air temperature in the duct is 55 F an...

Страница 25: ...lay reads 1200 ft min Act Vel ft 460 55 14 24 1200 460 70 147 12037 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 on the VELOCICHECK is 2 30 m s Act Vel m s 273 27 99 4 2 30 273 211 1014 2 39 ...

Страница 26: ......

Страница 27: ... 0 to 200 F 18 to 93 C Resolution 1 F 1 C Accuracy 1 F 1 C OPERATING TEMPERATURE RANGE Instrument 32 to 149 F 0 to 60 C Probe 0 to 200 F 18 to 93 C EXTERNAL METER DIMENSIONS Size Measurements 2 75 in x 1 3 in x 5 2 in 70 mm x 33 mm x 132 mm METER PROBE TYPE Description Detached telescoping Material Nickel plated brass and stainless steel METER PROBE DIMENSIONS Probe length 37 in 94 0 cm telescopic...

Страница 28: ...aline provided BATTERY LIFE Minimum 10 hours at 100 ft min 0 5 m s using alkaline batteries STANDARD EQUIPMENT Free certificate of NIST traceability operation and service manual four AA size alkaline batteries and hard shell carrying case 1 The accuracy statement of 5 0 of reading or 5 ft min 0 025 m s begins at 25 ft min through 4000 ft min 0 13 through 20 00 m s U S National Institute of Standar...

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