VelociCalc Multi-Function Thermal Anemometer Model 9555

The Model 9555 series are portable, hand held, Multi-Function Ventilation Test Instruments. These instruments are available with or without a differential pressure sensor and are designed to work with a wide range of plug-in probes. The probes allow users to make various measurements by simply plugging in a different probe that has the features and functions best suited for a particular application. They are designed to measure air velocity, temperature, humidity, CO and CO2. Calculations include air flow, heat flow, turbulence, wet bulb and dew point temperature. The probes can be ordered at any time and include a data sheet with certificate of traceability. When its time for servicing, only the probe needs to be returned since all the calibration data is stored within the probe.

Applications

• HVAC commissioning and troubleshooting
• Clean room certification
• Testing and balancing
• Ventilation evaluations
• Thermal comfort studies
• IAQ investigations
• Process air flow testing

Specifications VELOCICALC Models 9555, 9555-A, 9555-P, and 9555-X
Velocity (TA Probe)
Range	0 to 9,999 ft/min (0 to 50 m/s)
Accuracy1&2	±3% of reading or ±3 ft/min (±0.015 m/s), whichever is greater
Resolution	1 ft/min (0.01 m/s)
Velocity (Pitot Tube for Meter Models 9555, 9555-A, 9555-P)
Range3	250 to 15,500 ft/min (1.27 to 78.7 m/s)
Accuracy4	2,000 ft/min (±1.5% at 10.16 m/s)
Resolution	1 ft/min (0.01 m/s)
Velocity (Rotating Vane Probe Model 995)
Range	50 to 6,000 ft/min (0.25 to 30 m/s)
Accuracy	±1% of reading or ±4 ft/min (±0.02 m/s)
Resolution	1 ft/min (0.01 m/s)
Duct Size
Dimensions	1 to 250 inches in increments of 0.1 in. (1 to 635 cm in increments of 0.1 cm)
Volumetric Flow Rate
Range	Actual range is a function of velocity, pressure, duct size, and K factor)
Temperature (TA Probe Models 964, 966, 980, 983)
Range	14 to 140°F (-10 to 60°C
Accuracy5	±0.5°F (±0.3°C)
Resolution	0.1°F (0.1°C)
Temperature (TA Probe Models 960, 962)
Range	0 to 200°F (-18 to 93°C)
Accuracy5	±0.5°F (±0.3°C)
Resolution	0.1°F (0.1°C)
Temperature (Rotating Vane Probe Model 995)
Range	32 to 140°F (-0 to 60°C)
Accuracy5	±2.0°F (±0.1°C)
Resolution	1.0°F (0.1°C)
Relative Humidity (TA Probe Models 964, 966, 980, 982)
Range	32 to 140°F (-0 to 60°C)
Accuracy6	±2.0°F (±0.1°C
Resolution	1.0°F (0.1°C)
Relative Humidity (TA Probe Models 964, 966, 980, 982)
Range	0 to 95% RH
Accuracy6	±3% RH
Resolution	0.1% RH
Carbon Monoxide (IAQ Probe with CO Model 982)
Range	0 to 5000 ppm
Accuracy6	±3% of reading or ±50 ppm, whichever is greater
Resolution	1 ppm
Static/Differential Pressure (Probe for Meter Models 9555, 9555-A, 9555-P)
Range7	-15 to +15 in. H2O (-28.0 to +28.0 mm Hg, -3735 to +3735 Pa)
Accuracy	±0.01 mm Hg, ±0.005 in. H2O (±1% of reading ±1 Pa)
Resolution	0.001 in. H2O (1 Pa, 0.01 mm Hg)
Barometric Pressure
Range	2.036 to 36.648 in. Hg (517.15 to 930.87 mm Hg)
Accuracy	2% of reading
Instrument Temperature Range
Operating (Electronics)	40 to 113°F (5 to 45°C)
Storage	-4 to 140°F (-20 to 60°C)
Data Storage Capabilities
Range	26,500+ samples and 100 test IDs
Logging Interval
1 second to 1 hour
Time Constant
User selectable
External Meter Dimensions
3.8 in. x 8.3 in. x 2.1 in. (9.7 cm x 21.1 cm x 5.3 cm)
Meter Weight with Batteries
0.8 lbs. (0.36 kg)
Meter Probe Dimensions
Probe Length	40 in. (101.6 cm)
Probe Diameter of Tip	0.28 in. (7.0 mm)
Probe Diameter of Base	0.51 in. (13.0 mm)
Articulating Probe Dimensions
Articulating Section Length	6.4 in. (16.26 cm)
Diameter of Articulating Knuckle	0.38 in. (9.5 mm)
Power Requirements	Four AA-size batteries or AC adapter

Optional Probes for VELOCICALC 9555 Series Multi-Functional Anemometers
Model	Probe Description
960	Air Velocity and Temperature, straight probe
962	Air Velocity and Temperature, articulating probe
964	Air Velocity, Temperature, and Humidity, straight probe
966	Air Velocity, Temperature, and Humidity, articulating probe
995	100 mm Rotating Vane probe
968	Draft and Comfort probe
972	Surface Temperature probe
974	Air Temperature probe
980	Indoor Air Quality probe
982	Indoor Air Quality probe, with CO

	9555	9555-A	9555-P	9555-X
Probe that measures velocity, temperature, and humidity	straight	articulated	optional	optional
Pressure measurement	•	•	•
Calculates flow, wet bulb, dew point, standard/actual	•	•	optional	optional
Optional velocity and temperature probe	•	•	•	•
Optional rotating vane probe	•	•	•	•
Optional IAQ probes (CO2, temperature, humidity, CO)	•	•	•	•
Data Logging (manual, auto save continuous)	•	•	•	•
Data logging software	•	•	•	•
Free Certificate of Calibration	•	•	•	•
• 1 Temperature compensated over an air temperature range of 5 to 65°C (40 to 150°F). • 2 The accuracy statement begins at 0.15 m/s through 50 m/s (30 ft/min through 9,999 ft/min). • 3 Pressure velocity measurements are not recommended below 5 m/s (1000 ft/min) and are best suited to velocities over 2,000 ft/min (10.00 m/s). Range can vary depending on barometric pressure. • 4 Accuracy is a function of converting pressure to velocity. Conversion accuracy improves when actual pressure values increase. • 5 Accuracy with instrument case at 25°C (77°F), add uncertainty of 0.03°C/°C (0.05°F/°F) for change in instrument temperature. • 6 Accuracy with probe at 25°C (77°F). Add uncertainty of 0.2% RH/°C (0.1% RH/°F) for change in probe temperature. Includes 1% hysteresis. • 7 Overpressure range = 190 in. H2O, 360 mmHg, 48 kPa.