Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Shortridge Instruments FLOWHOOD AIRDATA CFM-88
Summary of Contents for Shortridge Instruments FLOWHOOD AIRDATA CFM-88
- Page 1 CFM-88L BACKPRESSURE COMPENSATED AIR BALANCE SYSTEM OPERATING INSTRUCTIONS Shortridge Instruments, Inc. 7855 East Redfield Road / Scottsdale, Arizona 85260-3430 Phone (480) 991-6744 • Fax (480) 443-1267 ® www.shortridge.com CFM-88L 07/20/09...
-
Page 2: Table Of Contents
CONTENTS 1.0 INTRODUCTION 1.1 GENERAL DISCUSSION 2.0 SPECIFICATIONS 3.0 EXTERNAL FEATURES 3.1 KEYPAD 3.2 FEATURES ON SIDES AND BACK OF METER 4.0 DISPLAY MESSAGES AND PROMPTS 4.1 READ PROMPTS 4.2 MEASUREMENT READOUTS 4.3 FUNCTION READOUTS 5.0 USING THE AIRDATA FLOWMETER 5.1 GENERAL USE 5.2 TREND READINGS 6.0 TEMPERATURE MEASUREMENT... - Page 3 REPLACEMENT PARTS LIST INDEX Copyright © Shortridge Instruments, Inc., 2009. All rights reserved. This information may not be reproduced or duplicated in any manner, or for any purpose, without permission in writing from Shortridge Instruments, Inc. Addendums or revisions made to this manual after July 2009 may be found at www.shortridge.com.
- Page 4 ILLUSTRATIONS 3.1 CFM-88L METER FRONT AND BACK 6.1 ADT442 TEMPROBE 6.2 AIRDATA MULTITEMP 9.1 FRAME STORAGE 9.2 FLOWHOOD IN CASE 9.3 FLOWHOOD ASSEMBLY 9.4 2X2 FRAME ASSEMBLY 9.5 1X4 FRAME ASSEMBLY 9.6 2X4 FRAME ASSEMBLY 9.7 1X5 FRAME ASSEMBLY 9.8 3X3 FRAME ASSEMBLY CFM-88L 07/20/09...
-
Page 5: Introduction
1.0 INTRODUCTION 1.1 GENERAL DISCUSSION These instructions will be much easier to follow if the meter is in front of you as you read through them. You can note the various connections and press the keys, observing the displayed results as you read through the various procedures. The operation of the meter is quite simple and straightforward, as will become apparent after a little practice. -
Page 6: Specifications
AIR FLOW: Measured in cubic feet per minute (cfm) or liters per second (L/s), corrected for local air density. This function requires the use of the Shortridge Instruments' Series 8400 Backpressure Compensating FlowHood System. The measurement range is 25 to 2500 cfm supply and 25 to 1500 cfm exhaust. Accuracy is ± 3% of reading ± 7 cfm from 100 to 2000 cfm (nonbackpressure compensated readings). -
Page 7: External Features
3.0 EXTERNAL FEATURES 3.1 KEYPAD Control Name Function ON/OFF Turns the meter on or off. MODE Sequential action for air flow, absolute pressure, temperature. UNITS Alternate action for English or metric units. READ Initiate a measurement; initiate or halt TREND readings. Turns the back-light on or off. -
Page 8: Cfm-88L Meter Front And Back
External Read Jack for 10 Digit, 0.4" LCD Display Pushbutton Handle Plug Back-light On or Off Battery Charger Jack MODE Flow/Temperature/Absolute Pressure GRN LED Indicates if charger is plugged in UNITS English/Metric READ Read/Halt/Initiate Trend Readings Power On Power Off CFM-88L METER FRONT Pushbutton Reset Switch Positive (+) Pressure Port... -
Page 9: Display Messages And Prompts
4.0 DISPLAY MESSAGES AND PROMPTS 4.1 READ PROMPTS The following six prompts all include the term READ, which is a signal for the operator to press the READ key to trigger the actual measurement. The units designation will always be followed by one of the three meter status characters, either a symbol for the level of battery charge, the light symbol or the TREND mode symbol. - Page 10 $ $ $ $ $ $ $ $ Blocks of pixels will be displayed to test the operation of the display each time the meter is turned on. n.nnnn This display indicates that the back-light is on and battery power draw has increased. xx indicates the units for the reading.
- Page 11 HALT This message will be displayed when a TREND mode sequence has been halted manually by holding down the READ key. The meter automatically switches to the manual reading mode and displays a standard manual reading after HALT is displayed. LIGHT OFF This message indicates that the display back-light has been turned off.
- Page 12 READING This message is displayed following MANUAL during the manual reading that is taken when a series of TREND readings is halted. RECHARGE This message signals that the batteries have reached the end of their useful charge, and must be recharged. The meter will turn off following the display of RECHARGE.
-
Page 13: Using The Airdata Flowmeter
5.0 USING THE AIRDATA FLOWMETER 5.1 GENERAL USE The CFM-88L AirData FlowMeter keypad has four function keys and a key for the back-light. Press the ON key to turn the meter on. The meter will display a row of pixel blocks to test the display, and will then display AUTO ZERO while performing a brief internal calibration test. -
Page 14: Temperature Measurement
6.0 TEMPERATURE MEASUREMENT 6.1 TEMPROBE Temperature measurements are obtained using the TemProbe temperature probe. The TemProbe may be plugged directly into the temperature input jack on the back of the meter. Since this receptacle is keyed, the plug of the TemProbe sensor must be correctly aligned for proper insertion. -
Page 15: Airdata Multitemp
These probes may be used in any liquid or gas compatible with stainless steel. Typical uses include: wet or dry bulb air temperatures; thermometer wells; "Pete's" plugs; 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 circulating process liquid systems. -
Page 16: Absolute Pressure
7.0 ABSOLUTE PRESSURE The absolute pressure function is intended mainly to provide automatic air density correction for the velocity and flow measurements. Absolute barometric pressure measurements are obtained when the negative (-) port is open to 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 directly to both the positive (+) and the negative (-) ports (in common) of the meter. -
Page 17: Air Flow Measurement
8.0 AIR FLOW MEASUREMENT 8.1 FLOWHOOD FUNCTION The AirData FlowMeter utilizes the Series 8400 FlowHood Kit for backpressure compensated measurement of air flow. The FlowHood unit captures and directs the air flow from an outlet, or inlet, across the highly sensitive flow sensing manifold within the FlowHood base. -
Page 18: Flowhood Assembly
9.0 FLOWHOOD ASSEMBLY 9.1 UNPACKING The FlowHood case has been specifically designed for the most efficient storage and handling of the FlowHood unit and its accessories. Note the arrangement of the various items as the unit is unpacked. Especially note the placement of the foam cushioning around the instrument, and the orientation of the meter face toward the side of the case. -
Page 19: Handle
When the top assembly is complete, the springs on the short rods of the top support assembly should be compressed to approximately 50% of normal extension. 9.5 HANDLE Attach the handle assembly to the handle plate using the knob type screw provided with the handle. SEE THE NEXT FOUR PAGES FOR DIAGRAMS OF THE CORRECT METHOD FOR ASSEMBLING STANDARD FLOWHOOD TOPS AND FRAME SETS. -
Page 20: Frame Storage
FIGURE 9.1 FRAME STORAGE FIGURE 9.2 FLOWHOOD IN CASE CFM-88L 07/20/09... -
Page 21: Flowhood Assembly
FIGURE 9.3 FLOWHOOD ASSEMBLY CFM-88L 07/20/09... -
Page 22: 2X2 Frame Assembly
FIGURE 9.4 2X2 FRAME ASSEMBLY FIGURE 9.5 1X4 FRAME ASSEMBLY FIGURE 9.6 2X4 FRAME ASSEMBLY CFM-88L 07/20/09... -
Page 23: 1X5 Frame Assembly
FIGURE 9.7 1X5 FRAME ASSEMBLY FIGURE 9.8 3X3 FRAME ASSEMBLY CFM-88L 07/20/09... -
Page 24: Flowhood Operating Procedure
10.0 FLOWHOOD OPERATING PROCEDURE The meter is inserted into the recess in the FlowHood base, using the captive fastener inside the base to secure it. The two pneumatic tubes from the flow sensing grid attach to the pneumatic inlets on the meter. The tube from the top side of the grid connects to the positive (+) pneumatic inlet on the meter. -
Page 25: Ratio Err Display
First, perform the nonbackpressure compensated portion of the measurement with the flaps open, as described above in Section 10.1 NONBACKPRESSURE COMPENSATED READINGS. This first reading will be displayed with a small ‘u’ for uncompensated (nonbackpressure compensated) as CF u nn. Close the flaps after the reading is displayed. Allow the system to settle, then press the READ key to take the second (backpressure compensated) reading. -
Page 26: Special Balancing Procedures
11.0 SPECIAL BALANCING PROCEDURES 11.1 PROPORTIONAL BALANCING Backpressure compensated readings should be taken during the preliminary survey of the entire system with all dampers fully open, and also during the final reading after balancing is complete. Nonbackpressure compensated readings require less time and are usually adequate for the preliminary balancing of outlets. -
Page 27: 14"X14"X14" Short Top Set
Reading accuracy is improved by adjusting the register deflection blades to a four-way spreading pattern before starting the measuring and balancing process. The deflection can then be readjusted for the desired deflection pattern after the final balancing and readings are completed. Resetting deflection patterns after air balance usually has little effect on the air delivery. -
Page 28: Correction Factors And Conversion Formulas
12.0 CORRECTION FACTORS AND CONVERSION FORMULAS 12.1 BAROMETRIC PRESSURE DENSITY CORRECTION - LOCAL DENSITY The CFM-88L AirData FlowMeter automatically corrects air flow readings to represent local density cfm as affected by barometric pressure. 12.2 BAROMETRIC PRESSURE DENSITY CONVERSION - STANDARD DENSITY Standard density air flow is calculated as if the same mass flow (lb/min) existed at standard conditions (29.92 in Hg &... -
Page 29: Meter Accuracy Field Testing
13.0 METER ACCURACY FIELD TESTING 13.1 METER ZERO FUNCTION Take several air flow readings with no air passing through the FlowHood unit. The meter should display zero readings, but may occasionally show a low reading such as 25 cfm. An occasional positive or negative reading is random electronic "noise"... -
Page 30: Duct Traverse Using The Airdata Multimeter
Where: = local barometric pressure (in Hg) 13.5 DUCT TRAVERSE USING THE AIRDATA MULTIMETER No corrections for density are necessary when an AirData Multimeter is used for the comparison pitot tube traverse if use of the TemProbe is consistent during both the air flow measurement using the FlowHood and the velocity measurement using the AirData Multimeter and pitot tube. -
Page 31: Meter Maintenance
14.0 METER MAINTENANCE The AirData FlowMeter is a precision instrument designed for long term field use if given reasonable care and maintenance. The meter and FlowHood should be kept reasonably clean, and should be stored in the protective case when not in use. The meter case and internal components are rugged, and well able to withstand normal handling. -
Page 32: Recalibration And Repair Information
12"x12"x8" with sufficient additional cushioning to fill the carton. Do not use spray foam. Spray foam can damage the meter and it is also possible to “lose” a meter in a chunk of spray foam. Ship directly to: Shortridge Instruments, Inc. 7855 E. Redfield Rd., Scottsdale, Arizona 85260 Attention: Recalibration and Repair Dept. -
Page 33: Warranty
Shortridge Instruments, Inc. reserves the right to make changes at any time, without notice, in prices, colors, materials, specifications and models, and also to discontinue models. -
Page 34: Appendix A - Battery Test Procedure
If the same capacity cells are not available, replace all 12 cells with new batteries. See the Instruction Manual Section 14.0 METER MAINTENANCE. If the problem is not corrected through these procedures, please return the meter to our factory for repair and calibration services. Shortridge Instruments, Inc. 7855 E. Redfield Road Attn: Recalibration Department Scottsdale, Arizona, USA 85260 Phone: (480) 991-6744 Fax: (480) 443-1267 www.shortridge.com... - Page 35 Please call 1-800-822-8837 for information on Ni-Cd battery recycling and disposal bans/restrictions in your area. Shortridge Instruments, Inc. involvement in this program is part of our commitment to preserving our environment and conserving our natural resources.
-
Page 36: Replacement Parts List
CFM-88L REPLACEMENT PARTS LIST Part no No reqd per set Description CFM-88LM AirData FlowMeter PS8201 Battery charger PS8202 Battery charger for European use 0445 Plug adapter for use with PS8202 battery charger AA-NICAD Rechargeable batteries ADT442 TemProbe temperature probe - 4" x 1/8" diameter IM-88L Instruction manual - CFM-88L 8400 FLOWHOOD... - Page 37 CFM-88L REPLACEMENT PARTS LIST (continued) Part no No rqd per set Description 3' x 3' TOP (91.4 x 91.4 cm) Side channel (type 1) Side channel (type 6) 3x3F Complete frame assembly (all of above) 3x3S Cloth skirt (36" x 36") 827E Support dowel extenders 3x3T...
-
Page 38: Index
CFM-88L INDEX AABC local air density 13, 24 ABS PRES 6, 12 LOCAL DENS absolute pressure 2, 12, 25 local density air flow Air Balance Manuals local density correction air density correction lockout air flow 2, 13, 20-25 LOW CHARGE 6, 7, 9, 27 Associated Air Balance Council low resistance outlets... - Page 39 temperature input jack 3, 4 TemProbe 10, 25, 26 TOO COLD TOO HOT TOO LOW top support assembly 14, 27 TREND TREND readings UNDER TEMP 8, 10 UNITS vapor pressure volume controlled outlets warranty 27, 29 n.nnnn › n.nnnn n.nnnn xx 6 n.nnnn xx 8 n.nnnn xx 9 n.nnnn...
Need help?
Do you have a question about the FLOWHOOD AIRDATA CFM-88 and is the answer not in the manual?
Questions and answers