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Single (HT312) and dual (HT322) channel, ultrasonic transit-time flowmeter with
printer, FlowSound audio output; attached two-meter extension cable per channel.
HT312/HT322(-CS):
HT312: Single channel flowmeter with built-in chart recorder; HT322: Dual-channel flowmeter with built-in chart recorder; HT312, 10 lb (4.5 Kg), HT322: 11 lbs (5 Kg) 11"(27.8 cm) wide x 4" (9.1 cm) high x 14" (35.4 cm) deep; attached two-meter flowprobe-to-flowmeter extension cable per channel; separate grounded medical grade power line-cord.
Input Power: Universal Power Supply 50-60 Hz; 100-240 V ± 10% (automatic voltage adjustment)
Fuses: 1.5A fast blo, mfg: bussman #GMA1.5,250 VAC
Both power entry conductors are protected by size 5 x 20 mm fuses.
Electrical Isolation:
Cabinet is grounded; line to ground leakage current: less than 100 µA @220-240 V line. All electronic components and cabling of the probe extension cable and probe are fully isolated to meet IEC "cardiac floating" specifications. Defibrillator protection: probes can remain attached to the patient during cardiac defibrillation, for instantaneous report on the restoration of flow.
Automatic Meter Adjustments for all operational settings
- · Ultrasound frequency and insonification parameters
- · Probe size and corresponding flow output ranges
- · Volume flow calibration of connected flowprobe
- · Flow sampling rate: optimized for local acoustic conditions
Digital Identification:
Probe identification and calibration parameters are programmed on an EEPROM inside the probe connector.
Compatible Flowprobes
Meters accept a range of HQ-Series probes for intraoperative surgical use. See probe specifications above or contact your local representative for models, sizes and recommended uses.
-CS Option Flowmeter Inputs
Two BNC connectors are provided on the rear panel asa auxiliary inputs (i.e., pressure or EKG monitors). Each accepts a signal range of ±5V.
RS232 output:
Optically isolated output connector meeting IEC060 patient isolation. Permits connector to a laptop or other data monitor computer. The ± 5V analog signals (and pressure, EKG Signals for -CS option meters) are digitized at 100 sampling rate with 12-bit resolution. Data is supplied in FLOWTRACE software at 19200 Baud.
Ultrasonic Frequency/Parameters:
The ultrasound output level of the flowsensors is factory-set and does not incorporate any interactive system features. These settings are made using "ALARA" principles (As Low As Reasonably Achievable), and are orders of magnitude below the FDA "preamendment levels," the USA insonification safety limits.
- · Transducer excitation: Burst of 10 to 24 waves (probe size dependent).
- · Transducer excitation frequency: 1.2 MHz to 4.8 MHz (probe size dependent).
- · Transducer excitation rate: 1.2 KHz to 14 KHz (probe size dependent), automatically
reduced further when probe operates in adverse acoustic conditions that would degrade measurement accuracy.
Regulatory Compliance:
Transonic Systems flowmeters and sensors comply with USA standards for medical and dental equipment (UL2601-1), and with European standards for medical and ultrasonic apparatus (IEC 601-1). These products are CE marked per 93/42EEC Annex II. Transonic Systems is an ISO9001/EN46001-certified facility.
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