Shortridge Instruments Airdata ADM-870, Operating Instructions Manual

Page 1: ...nts Inc 7855 East Redfield Road Scottsdale Arizona 85260 3430 Phone 480 991 6744 Fax 480 443 1267 www shortridge com S i AIRDATA MULTIMETER ADM 870 ELECTRONIC MICROMANOMETER AIR FLOW VELOCITY PRESSURE...

Page 2: ...IL 18 6 3 3 EXHAUST HOODS AIRFOIL PROBE 19 6 3 4 LAMINAR FLOW WORKSTATIONS AIRFOIL PROBE 19 6 4 VELGRID AIR VELOCITY 19 6 4 1 CHEMICAL EXHAUST HOODS VELGRID 20 6 4 2 LAMINAR FLOW WORKSTATION VELGRID 2...

Page 3: ...L PRESSURE FUNCTION 40 14 3 ABSOLUTE PRESSURE FUNCTION 40 14 4 AIR FLOW ACCURACY 40 14 5 DUCT TRAVERSE COMPARISONS INCLINED MANOMETER MICROMANOMETER 40 14 6 DUCT TRAVERSE USING THE AIRDATA MULTIMETER...

Page 4: ...6 4 VELGRID ASSEMBLY 21 7 1 STATIC PRESSURE PROBE 23 8 1 ADT442 TEMPROBE 25 8 2 AIRDATA MULTITEMP 26 10 1 FRAME STORAGE 30 10 2 FLOWHOOD IN CASE 30 10 3 FLOWHOOD ASSEMBLY 31 10 4 2X2 FRAME ASSEMBLY 32...

Page 5: ...emperatures can be measured from 67 F to 250 F either individually or in conjunction with an air flow or velocity measurement The Model ADM 870 AirData Multimeter performs these additional functions w...

Page 6: ...readings AIR DENSITY CORRECTION The air density correction range is 14 40 in Hg and 32 F to 158 F for correction of air flow and velocity measurements The readings represent either local density air...

Page 7: ...e accurate measurements Bleedthrough typ 0 0004 cu in in wc measurement Quiescent bleedthrough max 0 0005 cu in in wc minute TUBING The maximum recommended length of pneumatic tubing for the measureme...

Page 8: ...emory mode then alternate action for average and for total This key was labeled MEM prior to May 1993 ON Turns the meter on RCL Recalls stored readings in reverse order RCL Recalls stored readings in...

Page 9: ...e meter is dropped and may cause the keypad to become nonfunctional until the meter is reset If the meter continues to fall into lockout it may have been damaged and should be returned for repair PNEU...

Page 10: ...EAD Read Hold for Speed or Halt RCL Recall in Entry Order RCL Recall in Reverse Order OFF Power Off ON Power On Positive Pressure Port Negative Pressure Port Flaps Jack for FlowHood Flaps Plug Threade...

Page 11: ...hat the temperature readings will be displayed in degrees Celsius C LS READ This display indicates that the meter has been placed in the air flow function and will read in litres per second L s S READ...

Page 12: ...mode is selected and also upon each subsequent operation of the READ key AUTOSTOR This message indicates that the meter has been placed in the automatic memory mode which integrates the automatic rea...

Page 13: ...de is selected or when the meter is first turned on if the flaps plug is connected HALT This message will be displayed when an automatic reading sequence has been halted manually by holding down the R...

Page 14: ...tions do not apply to SPEED readings STD 70 F This message will be flashed during air flow or velocity measurements performed without the TemProbe The resulting flow or velocity value will be calculat...

Page 15: ...ADM 870 05 23 08 11 VELGRID This signal will be flashed when the VelGrid mode is selected and also upon each subsequent operation of the READ key...

Page 16: ...ited by pressing the SHIFT key followed by the CLEAR key 5 2 MEMORY AVERAGE TOTAL FUNCTION The memory average total function may be used with any of the measurement modes and allows the storage of up...

Page 17: ...ay be combined to gain the increased resolution afforded by the increased time base of the measurement interval This function permits the operator to store up to 100 fully automatic repeated readings...

Page 18: ...he SPEED READ function may be terminated while HALT is displayed by pressing the SHIFT key followed by the CLEAR key or by turning the meter off The memory function may be activated while HALT is bein...

Page 19: ...ating air flow from velocity measurements at most air movement devices such as Clean Room HEPA filters chemical exhaust hoods safety cabinets laminar flow work stations coil and filter face velocities...

Page 20: ...90 degree angle located near the base The measurement range of the AirData Multimeter with the pitot tube is 25 to 29 000 fpm calibration accuracy is certified to 8 000 fpm The stainless steel pitot t...

Page 21: ...city pressure rather than velocity A pitot tube used with the AirData Multimeter reads out directly in velocity when used in the PITOTUBE mode and reads velocity pressure when used in the DIF PRES mod...

Page 22: ...tally and up against the bottom edge of the sash door Tape markers on the AirFoil probe and along the sash door edge at 6 centers will aid in accurate positioning of the AirFoil probe The individual r...

Page 23: ...nt is usually adequate 6 4 VELGRID AIR VELOCITY IMPORTANT See Section 6 1 VELOCITY CORRECTION FACTORS The VelGrid accessory is designed especially for use in the measurement of general face velocity c...

Page 24: ...panel face The velocity average obtained in this manner can be used to calculate the volumetric air flow rate as described in Section 6 4 3 AIR FLOW CALCULATION 6 4 3 AIR FLOW CALCULATION FROM VELGRID...

Page 25: ...ADM 870 05 23 08 21 6 4 VELGRID ASSEMBLY...

Page 26: ...ity conditions other than standard must be corrected for local air density conditions if these results are to represent true velocity Air velocity readings taken with the ADM 870 in the standard densi...

Page 27: ...RESSURE PROBES Static pressures are measured with static pressure probes These probes are brass colored and have a single tubing connection in the magnetic base Connect the tubing from the static pres...

Page 28: ...the atmosphere and the meter is in the absolute pressure mode The measurement range is 10 40 in Hg Specific absolute pressure source measurements may be obtained by connecting the pressure source dir...

Page 29: ...emp combines with the memory function of the AirData Multimeter to store up to 100 temperature readings along with the sequence tag for each reading Each temperature reading may be entered into memory...

Page 30: ...lugs or direct immersion Some applications include humidity control systems direct expansion A C systems outside air adjustment hot water heating chilled water condenser water and many other circulati...

Page 31: ...n the display immediately prior to the display of the air flow reading The flow is calculated using an assumed standard temperature of 70 F 9 2 BACKPRESSURE COMPENSATION The air flow delivery of a sup...

Page 32: ...nel when the two pieces are slid together Side extension channels are joined together by a thumbnut and splice angle arrangement The individual frame pieces are stamped with a frame number as shown ci...

Page 33: ...added to both the top and bottom of the support dowels The dowel end pins are to be inserted into the frame corner brackets as shown in Figure 10 8 Each frame piece has been labeled to indicate posit...

Page 34: ...ADM 870 05 23 08 30 FIGURE 10 2 FLOWHOOD IN CASE FIGURE 10 1 FRAME STORAGE...

Page 35: ...ADM 870 05 23 08 31 FIGURE 10 3 FLOWHOOD ASSEMBLY...

Page 36: ...ADM 870 05 23 08 32 FIGURE 10 4 2X2 FRAME ASSEMBLY FIGURE 10 5 1X4 FRAME ASSEMBLY FIGURE 10 6 2X4 FRAME ASSEMBLY...

Page 37: ...ADM 870 05 23 08 33 FIGURE 10 7 1X5 FRAME ASSEMBLY FIGURE 10 8 3X3 FRAME ASSEMBLY...

Page 38: ...her at any convenient point on the outside of the base Set the flaps control knob to the open position Press the READ key or the thumbswitch on the FlowHood handle and the reading will be displayed di...

Page 39: ...with the flaps open as described above Close the flaps when the meter displays CALC When the first reading is displayed press the READ key to take the second backpressure compensated reading If necess...

Page 40: ...in the exhaust hood It is very important that a kitchen system balance be confirmed by measurements for air flow room pressure and actual makeup air while the cooking devices are at their normal work...

Page 41: ...use an extreme concentration of air velocity on portions of the flow sensing grid The FlowHood readings will be inaccurate under such conditions Reading accuracy is improved by adjusting the register...

Page 42: ...the density effects of relative humidity using the formula shown below This calculation requires the use of the vapor pressure which must be looked up on a Dew Point Vapor Pressure conversion chart T...

Page 43: ...n with the ADM 870 AirData Multimeter may be compared with hot wire anemometer readings if the hot wire readings are corrected for local air density conditions to obtain true air velocity results The...

Page 44: ...ure source must be self replenishing such as a pressure drop across a needle valve orifice or orifice plate 14 3 ABSOLUTE PRESSURE FUNCTION Confirm the accuracy of the absolute pressure correction by...

Page 45: ...obe is not used for either the flow or velocity measurement it must not be used for the other type of measurement In this case both sets of measurements will be calculated using standard 70 F conditio...

Page 46: ...anything inside the meter will void the warranty and may cause serious damage to the sensitive electronic components The AirData Multimeter should be returned to the factory at least every two years...

Page 47: ...tional cushioning to fill the carton Do not use spray foam Spray foam can damage the meter and it is possible to lose a meter in a chunk of spray foam Ship directly to Shortridge Instruments Inc 7855...

Page 48: ...gular charges will apply This warranty shall be effective only if use and maintenance is in accordance with our instructions and written notice of a defect is given to the Seller within such period TH...

Page 49: ...for the density effect of variations in temperature Record the AirData Multimeter temperature and absolute barometric pressure reading at the beginning and end of each probe test range These readings...

Page 50: ...et up with different pressures of precisely the desired test differential pressure These testers must be carefully adjusted to an accurate equal base pressure of approximately 3 psi before adding weig...

Page 51: ...the upper half positive 6 cells of the battery set by placing your DC voltmeter common ground probe at the left center battery clip and the other probe at the upper right corner battery clip The volt...

Page 52: ...d above The temperature during storage should be less than 95 F The batteries will function best after storage if reconditioned by performing two full cycles of 24 hour charge and full discharge follo...

Page 53: ...e IM 870 1 Instruction manual ADM 870 8400 FLOWHOOD 844 1 FlowHood base assembly with flaps 845 1 Flow sensing grid 826 1 Top support assembly 842 1 Pushbutton handle assembly 827 4 Support dowels 838...

Page 54: ...set complete 3 x 3 TOP 91 4 x 91 4 cm 141 4 Side channel type 1 336 4 Side channel type 6 3x3F 1 Complete frame assembly all of above 3x3S 1 Cloth skirt 36 x 36 827E 8 Support dowel extenders 3x3T 1...

Page 55: ...nnn 7 chemical exhaust hoods 19 clean room filter outlets 19 CLEAR 4 9 12 clear memory 13 constant volume controllers 36 correction factors 18 38 default air density correction 18 DENS 4 density corre...

Page 56: ...all 6 RECHARGE 10 relative humidity 38 relative humidity correction 38 replacement parts list 49 50 reset switch 6 response time 2 safety cabinets 19 safety notice 34 sea level conditions 22 Sheet Met...