VT Plus HF

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The VT PLUS HF is Fluke Biomedical’s premier general-purpose gas-flow analyzer. In addition, special display modes and bi-directional flow make it perfect for fully and efficiently testing both conventional mechanical ventilators and high-frequency ventilators. EC.6.20 now requires 100 % completion of scheduled life-support device preventive maintenance every year, and VT PLUS HF can help meet those requirements. Multiple special-function tests make troubleshooting quick and efficient.

VT PLUS HF has the capability to measure either high- or low-flow and pressure, replacing the need for gauges and flow meters. It measures 21 ventilator parameters and can display all of them on one screen. Results can be printed directly from the unit or from a PC with included Windows-compatible software. VT PLUS HF also has onboard graphing capability and shows the minimum, maximum, average, and absolute measurement for all parameters.

Learning to use the VT PLUS HF is simple. Technicians control the unit using the VT PLUS HF user-friendly command system, or, if they’re familiar with the RT-200, they can switch to a special control mode that uses RT-200-style commands.

VT PLUS HF can be operated with a variety of precision test lungs to ensure that ventilators are tested to manufacturers’ specifications and clinical expectations with a fully NIST-traceable testing system.

Key features

Bi-directional flow, pressure, volume, and oxygen concentration, and pressure measurements
Low- and high-pressure, and flow measurement capability
Special HF mode—up to 900 BPM (15 Hz)
RS-232 and printer ports
Included Windows-compatible graphics software
All 21ventilator parameters displayed at once on one screen
Operation by user-friendly VT PLUS HF command mode or special RT-200 command mode
Minimum, maximum, average, absolute, and graph for all parameters
Multiple special-function tests for efficient troubleshooting

Optional Feature

Operation with a variety of precision test lungs available from Fluke Biomedical to complete a fully NIST-traceable ventilator testing system

Specifications

Power

	100 V ac to 240 V ac, 50/60 Hz
Maximum over-voltage:	264 Vac

Display

	320 x 240 LCD with CFL backlight
Viewing Area:	10.1 cm x 8.2 cm (3 in x 4 in)
	Blue on white background

Operational Modes

	Manual mode, for simple tests or troubleshooting
	Computer-control mode, using RS-232 serial port for special applications
	Use of VT PLUS HF with VT Plus for Windows, for recording graphs and logging data to a computer

Oxygen Measurement

Range:	0 % to 100 %
Accuracy:	±2 % FSO
Resolution:	0.1 % O2
Transducer Location:	Internal

Gas Compatibility

Air, O2, CO2, N2, N2O, He, mixtures or user-defined

Gas Reference Units

ATP, STPD0, STPD21 and BTPS

Output Ports

RS-232 serial port and parallel printer port

Test Parameters

Continuous Flow:	Low Flow: ± (2 % of reading and 1 % of range) High Flow: ± (2 % of reading and 1 % of range)
Volumetric Flow:
	Low-Flow:
	Flow Range: -25 lpm to 25 lmp
	Accuracy: ± 2 % of reading or ± 1 % of range, whichever is greater
	Frequency Response: > 25 Hz or t10-90 < 40 ms, whichever is greater
	Low Flow Dropout: 0.01 lpm
	Breath-Defect Threshold: 0.5 lpm
	Maximum-Flow Rate: 50 lpm
	Volume Range: > ± 60 L
	Sample Rate: 100 Hz
	Resolution: 0.01 lpm flow > 1 lpm; 0.001 lpm flow < 1 lpm
	Dynamic resistance: < 2.5 cmH2O @ 5 lpm
	Fittings: 15 mm OD, 1:40 conical male; 0.25 in NPT ID per ASTM F-1054 aluminum with black anodized finish
	Notes: Tidal-volume accuracy: ± 3 % of reading or ± 2 ml, whichever is greater Volume accuracy tested to 1 liter Flow accuracy is specified for dry air or oxygen Below 3.0 lpm, measurement accuracy is obtained by allowing the VT PLUS HF to fully warm up or manually zeroing before reading or documenting measurement
	High-Flow:
	Flow Range: -300 lpm to 300 lmp
	Accuracy: ± 2 % of reading or ± 2 % of range, whichever is greater
	Frequency Response: > 25 Hz
	High-Flow Dropout: 25 lpm
	Breath-Detect Threshold: 2 lpm
	Maximum-Flow Rate: 500 lpm
	Volume Range: > ± 60 L
	Dynamic Resistance: < 2 cmH2O @ 60 lpm
	Sample Rate: 100 Hz
	Resolution: 0.01 lpm
	Fittings: 22 mm OD, 1:40 conical male; 15 mm ID, 1:40 conical female per ASTM F-1054 aluminum with black anodized finish
	Notes: Tidal-volume accuracy: ± # % of reading or ± 10 ml, whichever is greater Volume accuracy tested to 7 liters Flow accuracy is specified for dry air or oxygen
	Low-Pressure:
	Range: ± 500 mmHg (10 psi)
	Accuracy: ± 0.8 % of reading or ± 1.5 mmHg, whichever is greater
	Frequency Response: > 10 Hz
	Resolution: 0.1 mmHg
	Fittings: Luer lock, stainless steel
	Maximum Applied Pressure: 60 psi
	Sample Rate: 100 Hz
	Operating Pressure: 30 psi
	Note: Fluid pressure may be applied to the positive port; however, fluids should be kept from entering the pressure port by using a suitable length of connection tubing
	High-Pressure:
	Maximum Applied Pressure: 150 psi
	Range: ± 100 psi
	Accuracy: ± 1 % of reading or ± 0.3 psig, whichever is greater
	Frequency Response: > 10 Hz
	Resolution: 0.1 psi
	Sample Rate: 100 Hz
	Fittings: DISS connector, stainless steel
	Airway-Pressure:
	Maximum Applied Pressure: 20 psi
	Range: ± 120 cmH2O
	Accuracy: ± 0.75 % of reading or ± 0.5 cmH2O, whichever is greater
	Frequency Response: > 25 Hz or t10-90 < 40 ms, whichever is greater
	Resolution: 0.1 cmH2O
	Fittings: Internally connected at the transducer distal end
	Note: Airway pressure is internally tapped off the proximal-flow sensor port, which is the port closest to the exhaust port on the VT PLUS HF

Ventilator Parameter

Inspiratory and expiratory tidal volume	Range:As specified in high-flow/low-flow spec
	Accuracy: As specified in high-flow/low-flow spec
Expiratory minute volume	Range: 0 L to 60 L
	Accuracy: ± 3 of % or 250 ml
Breath rate	Range: 0.5 BPM to 150.0 BPM
	Accuracy:± 1 of %
Inspiratory-to-expiratory time ratio (I:E ratio)	Range: 1:200 to 200:1
	Accuracy: ± 2 % or ± 0.1 s
Inspiratory time	Range: 0 s to 60 s
	Accuracy: ± 1 % or ± 0.1 s
Expiratory time	Range: 0 s to 90 s
	Accuracy: ± 1 % or ± 0.1 s
Peak inspiratory pressure	Range: ± 120 cmH2O
	Accuracy: ± 3 % or ± 1 cmH2O
Inspiratory pause pressure	Range: ± 120 cmH2O
	Accuracy: ± 3 % or ± 1 cmH2O
Mean airway pressure	Range: ± 80 cmH2O
	Accuracy: ± 3 % or ± 0.5 cmH2O
Positive end-expiratory pressure (PEEP)	Range: -5 to 40 cmH2O
	Accuracy: ± 3 % or ± 0.5 cmH2O
Lung compliance	Range: 0 to 150 ml/cmH2O
	Accuracy: ± 5 % or ± 5 ml/cmH2O
Inspiratory hold time	Range: 0 s to 60 s
	Accuracy: ± 1 % or ± 0.1 s
Expiratory hold time	Range: 0 s to 90 s
	Accuracy: ± 1 % or ± 0.1 s
Peak expiratory flow	Range: 0 lpm to 300 lpm
	Accuracy: ± 3 % or ± 2 lpm
Peak inspiratory flow	Range: 0 lpm to 300 lpm
	Accuracy: ± 3 % or ± 2 lpm
Flow bias	Range: 0 lpm to 30 lpm
	Accuracy: ± 2 % or ± 0.5 lpm

Operating Environment Conditions

Temperature Range:	10 °C to 40 °C
Ambient Humidity:	0 % to 80 % noncondensing to 31 °C, decreasing to 50 % at 40 °C
Barometric Pressure:	8 psig to 18 psig

Storage Environment Conditions

Temperature Range:	-25 °C to -50 °C
Humidity:	0 to 95 % noncondensing

Dimensions (WxDxH)

	25.4 cm x 25.4 cm x 12.7 cm
	(10 in x 10 in x 5 in)

Weight

4.53 kg (10 lb)

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