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Portable Tritium in Air Monitor (TYNE ENGG.INC) |
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Portable Tritium-in-Air-Monitor
Model: 7043
Application
Tyne Engineering's new handheld Tritium In-Air Monitor monitors for both tritium and gamma in a single robust, portable instrument.
Features
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Simple to use, with only one operating switch with four settings: Off,
Sample, Pump, Set Up.
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Gamma Compensation with four large ion chambers arranged in a cruciform
configuration. Two chambers are used for measuring the air sample, and two
are for compensation.
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Less than 10% inaccuracy in 20 mR/hr field
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High Sensitivity. The volume of a measured charge is 500 cc. The current
amplification circuit employs ultra-low leakage technology. Each chamber has
its individual amplifier, increasing the Signal-Noise Ratio of the analog
circuit.
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Sensitivity is 1µCi/m³.
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Radon compensation is provided by the analog filter circuit designed to
separate the radon spike. The software can distinguish the radon spike from
the tritium signal occuring as a slow-change signal.
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Ion-traps are built into each ion chamber.
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Noble gas compensation is accomplished by interposing a desiccant
cartridge between the ports of the measurement and compensation chambers.
The airflow to and from these chambers is channeled through ports that are
accessible from the instrument's faceplate. The noble gas signal can be
displayed by the micro-processor.
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Direct gamma measurement is provided using an installed GM tube.
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Decontamination by purging of all 4 ion chambers can be achieved with use
of the centrally installed cartridge heater.
Description
Compensation for Gamma background is crucial in tritium measurement, since a gamma field of 1mR/Hr will generate 500 times the ionization generated in 1µCi/m³ of tritium. Tyne designed the four, 250 cc ion –chambers in a cruciform with each chamber connected to an ultra sensitive electrometer amplifier and filter. All signals pass through the ADC converter, and the micro-processor calculates and displays the tritium value. To cover high ranges of tritium a separate small ion chamber is used. Measurements such as flow from the solid-state flowmeter and chamber temperature are also monitored by the micro-processor.
Instrument output includes analog (0-5V, 4-20mA); relay alarm contact (30VDC, 1A) for operation of external equipment; and communication (RS232/RS485) to enable downloading or recording of information onto a computer. The TFT full color LCD display mounted on the surface plate clearly displays instrument readings in both digital and graphic format to show real time measurements and trends.
The well balanced, easy-to-carry instrument can be placed on its end for easy visibility of the touch screen monitors to operators working away from the instrument.
Batteries installed in the handle are easily replaced.
A powerful long-life pump can be used to draw air through a 10 meter tube. This allows the instrument to be used to measure the inside of rooms without the need to enter the room.
Specifications
| Sensitivity | 1µCi/m³ ( 0.05 DAC) |
| Accuracy | ±3µCi/m³ from 1 to 100µCi/m³, ±10% from 100µCi/m³ to 20,000
µCi/m³ |
| Range | 1 µCi/m³ to 199,999 µCi/m³ |
| Detector | 4 matched chambers - Two for measuring, two for
compensation |
| Measuring chamber effective volume | 500 cc (2 measuring chambers of 250cc each) |
| Flow rate | 1.0 L/m |
| Zero stability | ±1µCi/m³ immediately after unit is powered on |
| Background cancellation | Less than 10% of the reading change in 20 mR/hr field |
| Radon compensation | Included in the software |
| Ion trap | Built into each ion chamber |
| Dust filter | Built into the unit. |
| Noble gas cancellation | Ports for air inlet/outlet of measuring chambers and compensation
chambers are accessible on surface plate so silica gel drier can be
placed between the chambers to compensate for presence of noble
gas. |
| Tritium Discrimination | Instrument can discriminate in a field of HTO and elemental H3
using the silica gel drier. |
| Purge/Decontamination | All 4 Chambers can be heated up by a cartridge heater controlled
by unit |
| Display | Graphic touchscreen LCD display. Unit displays the values(tritium
and Gamma) both in numerical format and graphical trend. |
| Communication | Can be configured to RS232(Short distance) or RS485(Long
distance). |
| Analog output | 0-5 V Linear or logarithmic voltage output. |
| Power supply | 2.5 V- 5V external power supply, or 3 C-cell battery. Total power
consumption is 150mA. |
| Gamma measurement | Gamma is measured directly by the unit. Gamma measuring range is
from 0.1mR/h to 10R/h |
| Alarm | Tritium alarms, gamma alarms, low air flow alarms will all be
shown by red LED light and by an audible device. |
| Data logging | The tritium and gamma values are logged every minute with current
time and date stamp |
| Size and weight | 8"(L)x5"(H)x5"(W), 7 lbs. |
| Drier | Note that the silica gel drier is not part of the standard
equipment, but can be supplied as an extra. |
| Response Time | 30 seconds at 90% of signal |
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Contact for |
| Address : |
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FF-18, Sardar Complex, Opp. Bhagvan Nagar,
Nr. Govind vadi, Isanpur, Ahmedabad - 382443. Gujarat, India.
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E-Mail :
Phone :
Fax :
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info@hinuc.net
sales@hinuc.net
+91 - 79 2538 2108
+ 91 - 79 - 25395415 |
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| Website : |
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www.hinuc.net
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