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YELLOW JACKET

®

Anemometer/Thermometer

FPM, CFM and temperature readings with one hand-held instrument

Operation 
and Maintenance

UPC No.
686800

68915

The YELLOW JACKET Anememoter 
/ Thermometer 68915 is a versatile 
instrument that measures air velocity 
(FPM - feet per minute; or MPS - 
meters per second), air flow volume 
(CFM - cubic feet per minute; or CMS 
- cubic meters per second) and 
temperature. Temperature is read at 
the same time as velocity or flow 
measurements in your choice of °F or 
°C. The unit eliminates analog charts 
that are hard to read and calculate.

Features include:

Microprocessor controller

Minimum and maximum   
recordings

Averaging of FPM, MPS or CMS 
multipoint readings

“Hold” button to freeze LCD 
reading

Switchable imperial to metric

Automatic power shut-off after 20 
minutes unless set for continuous 
operation in non-sleep mode

RS-232 output

Specific applications in the HVAC 
industry include environmental paint 
booths, air balancing, and many others 
where measurement of air velocity, 
flow and temperature are essential.

Check for damage immediately.

Carton contents include:
1 pc. hand-held instrument
1 pc. vane type probe head with cable
1 pc. 9-volt alkaline battery
1 pc. maintenance & operation 
   instructions
1 pc. carrying case

Содержание 68915

Страница 1: ...hat are hard to read and calculate Features include Microprocessor controller Minimum and maximum recordings Averaging of FPM MPS or CMS multipoint readings Hold button to freeze LCD reading Switchable imperial to metric Automatic power shut off after 20 minutes unless set for continuous operation in non sleep mode RS 232 output Specific applications in the HVAC industry include environmental pain...

Страница 2: ...s 1 111 ft which is equivalent to a 10 x 16 duct You can change this number see page 5 to different dimensions if necessary This button provides several functions Freezes a reading in the LCD Stores readings for minimum maximum and minimum maximum averages for FPM Increases the numerical value of each individual digit in the Free Area number For example pressing the button will change the number f...

Страница 3: ...n 1 Press the ON and HOLD buttons at the same time 2 Release only the ON button 3 After an n appears on the LCD release the HOLD button The 68915 will remain on until the OFF button is pressed Specifications Air flow ranges 125 4900 ft min 0 7 25 m sec Flow resolution 1 0 01 Flow accuracy 2 Temperature 14 to 122 F 10 to 50 C Temp resolution 01 0 1 Temp accuracy 1 0 F 0 6 C Power 9 volt 100 hour Fa...

Страница 4: ... MODE SELECT to switch from FPM velocity to CFM flow readings Before switching be sure the Free Area number matches the open square footage of the grill or duct you are measuring see page 5 for Setting Free Area Number Multipoint FPM 1 Turn unit on 2 Place vane probe head at first point to be measured 3 After you see the reading in the LCD press HOLD ADVANCE Release the button when you hear a sing...

Страница 5: ...at step 3 5 Repeat steps 3 and 4 until all digits match the desired number 6 Press MIN MAX RECORD button 7 When the flashing stops press the HOLD button to save the changed Free Area number The unit will go to the CFM measurement mode fig 9 APPENDIX A VOLUME AIRFLOW CALCULATIONS The Free Area is equal to the cross sectional area of the duct or diffuser minus the amount of blockage In rectangular d...

Страница 6: ...on by pressing the ON OFF and NEXT DIGIT AVERAGE buttons at the same time 2 Release the ON button first 3 When the LCD shows a small ft m m s F and C release the AVERAGE button A small ft m and F will remain on the LCD 4 Press HOLD to change to m s and C 5 Press RECORD button and a 5 will appear on the LCD 6 Press HOLD ADVANCE and a Baud Rate of 1200 or 2400 will appear see section for changing Ba...

Страница 7: ...n the unit on by pressing the ON OFF and NEXT DIGIT AVERAGE buttons at the same time 2 Release the ON button first 3 When the LCD shows a small ft m m s F and C release the NEXT DIGIT AVERAGE button A small fm s and C or ft m and F will remain on the LCD 4 Press RECORD button and a 5 will appear on the LCD 5 Press HOLD ADVANCE and a Baud Rate of 1200 or 2400 will appear To change from 1200 to 2400...

Страница 8: ...tain an RGA number from Ritchie Engineering Customer Service by calling 800 769 8370 All electronic prod ucts must be returned to Ritchie Engineering prepaid YELLOW JACKET Products Division Ritchie Engineering Company Inc 10950 Hampshire Avenue South Bloomington MN 55438 2623 Phone 952 943 1333 or 800 769 8370 Fax 952 943 1605 or 800 322 8684 Some specialty products are not stocked and thus not el...

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