Shortridge Instruments ADM-860C - Velgrid Assembly

Shortridge Instruments ADM-860C

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ADM-860C 04/14/0833

FIGURE 6.3 VELGRID ASSEMBLY

Table of Contents

Default Chapter1
- Operating Instructions1
- Table of Contents2
1 Introduction6
- General Discussion6
2 Specifications7
3 External Features9
- Keypad9
- Features on Sides and Back of Meter9
- Adm-860C Meter Front and Back11
4 Display Messages and Prompts12
- Read Prompts12
- Measurement Readouts12
- Function Readouts13
5 Using the Airdata Multimeter21
- General Use21
- Trend Readings22
- Memory/Average/Total Function22
- Data Download to a Printer24
  - Download Individual Readings to a Printer24
  - Download Readings in Memory to a Printer24
- Data Download to a Computer25
6 Velocity Measurement31
- Velocity Correction Factors31
- Pitot Tube Velocity Measurement32
- Pitot Tube33
- Airfoil Velocity Measurement34
- Airfoil Probe34
- Single Point Centerline Air Velocity Measurements36
- Velgrid Air Velocity36
- Velgrid Assembly38
7 Pressure Measurement39
- Differential Pressure39
- Absolute Pressure40
8 Temperature Measurement41
- Temprobe41
- Airdata Multitemp41
- Airdata Multitemp42
9 Air Flow Measurement44
- Flowhood Function44
- Backpressure Compensation44
10 Flowhood Assembly45
- Unpacking45
- Frame Assemblies45
- Fabric Tops45
- Top Support Assembly45
- Handle46
- Frame Storage47
- Flowhood in Case47
- Flowhood Assembly48
- 2X2 Frame Assembly49
- 1X4 Frame Assembly49
- 1X5 Frame Assembly50
- 3X3 Frame Assembly50
11 Flowhood Operating Procedure51
- Air Flow - Nonbackpressure Compensated Readings51
- Air Flow - Backpressure Compensated Readings51
  - Memory Display in Flowhood Mode52
  - Ratio Err Display52
12 Special Balancing Procedures53
- Proportional Balancing53
- Large Return Air Grilles53
- Kitchen Exhaust Hoods53
  - Range Exhaust Filters and Grease Extractors53
- Constant Volume Controllers53
- Linear Slot Diffusers54
- Sidewall Registers54
- 14"X14"X14" SHORT TOP SET54
- System Problems54
13 Correction Factors55
- Barometric Pressure Density Correction - Local Density55
- Barometric Pressure Density Correction - Standard Density55
  - Standard Density - Temprobe Used55
  - Standard Density - Temprobe Not Used55
- Temperature Density Correction55
- Relative Humidity Correction55
- Hot Wire Anemometer Versus Airdata Multimeter56
14 Meter Accuracy Field Testing57
- Meter Zero Function57
- Differential Pressure Function57
- Absolute Pressure Function57
- Air Flow Accuracy57
- Duct Traverse Comparisons, Inclined Manometer, Micromanometer58
- Duct Traverse Using the Airdata Multimeter58
- Backpressure Compensated Comparison Reading58
- Nonbackpressure Compensated Comparison Reading58
15 Meter Maintenance59
16 Flowhood Maintenance59
17 Recalibration and Repair Information60
- Air Balance Manuals & Training Programs60
- Warranty61
Appendix A - Nist Velocity Testing62
Appendix B - Laboratory Differential Pressure Test63
Appendix C - Battery Test Procedure64
- Prolonging Battery Life65
  - Adt442 Temprobe66
- Replacement Parts List66
- Index68

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