RMS1000 English

Thurning Instruments Ltd. Modular Radiation Measurement Gauge RMS1000

Thurning Instruments' RMS1000 is a modular radiation detector system for making thickness or density measurements with X-rays or gamma rays.

RMS1000

Advantages of the RMS1000 modular radiation detector:

Standard setting speed of response: through the use of Thurning Instruments' digital "current mode" measurement technology and advanced signal processing. SZ70 scintillation detectors have a response time of less than 1 millisecond for 100% response to a step input

Outstanding dynamic range: to eliminate the need for detector changes with changing product thickness or density range. IK50 ionisation tube detectors offer a dynamic range better than 1:10⁵.

"Customised" detectors: Thurning offers a choice of standard detectors, however variants of these can readily be produced. Detectors are made to suit applications where space is at a premium and also for applications where detection efficiency and low source intensity are the priorities.

Choice of output: the RMS1000 is normally supplied with both 0 - 10V analogue and RS485 serial digital outputs. The RS485 digital output is recommended for excellent immunity to electromagnetic interference. It also eliminates the cost of a high-resolution AD converter card when interfacing with a computer.

How the RMS1000 radiation detector is used:

RMS1000 is used for making non-contacting, non-intrusive measurements using X-rays or gamma rays in a wide range of fields.

RMS1000 is the flexible choice when you need fast, high-resolution, thickness or density measurements in an industrial or research environment.

The modular system with the option of two detector types means that the RMS1000 is easily optimised to suit your measurement and process.

Scintillation detectors are used when speed of response is critical, or when it is necessary to use higher energy radiation for measuring very thick or dense material. SZ70 scintillation detectors offer a dynamic range of 1:10⁴ or better and a minimum integration time of 1 ms. The detection efficiency is greater 75% for Americium 241 gamma rays, and is still better than 35% for Cobalt 60.

Ionisation tube detectors are used when the principal requirement is outstanding dynamic range (exceptional noise and stability performance), but slower response and lower detection efficiency (for high-energy radiation) can be accepted. IK50 ionisation tube detectors have a dynamic range of 1:10⁵ and a minimum response time of 20 ms.

The RMS1000 module is compatible with the SMS100 family of detectors, formerly manufactured by Löffel Verfahrenstechnik GmbH.

Thurning detectors are in service for:

Non-destructive testing of pressed refractory materials

Measuring void fraction and mass flow of steam/water two phase flows

Detecting foaming in hydraulic oils

Density logging of geological core samples, ranging from ice to sediment and rock

Quality control of steel forgings and ferrite pressings

Thickness gauging of a variety of web products

RMS1000 Specification


RMS1000 Scintillation Detector	RMS1000 Signal conditioning Module

Parameter	SZ70 Scintillator	IK50 Ionisation Tube
Measurement resolution:	0.1% of thickness or density reading down to 1% of range
Non-linearity:	0.1% of range	0.1% of range
Zero stability:	1 x 10^-4 of range/ 24 hrs	1 x 10^-4 of range/ 24 hrs
Gain stability:	0.1% of range/24 hrs	0.05% of range/24 hrs
Temperature stability:	< 0.02%/°C	< 0.01%/°C
Electronic noise:	< 10 ppm	< 10 ppm
Minimum integration time:	1 ms	20 ms
Maximum integration time:	500 ms	500 ms
Maximum photon rate:	> 1 x 10¹⁰/s	> 1 x 10¹⁰/s
Analogue output:	0 to 10V	0 to 10V
RS485 digital output:	20 bit, half duplex	20 bit, half duplex

Instrument set-up:

The instrument set-up is controlled from the module front panel. The user adjustments are gain/sensitivity, integration time and analogue output filter time constant. Access to the instrument calibration values is protected by a dongle.

Power Supply:

The instrument requires a mains power supply at 230V a.c., 20 W.

Both detector and electronics are designed for operation over an ambient temperature range of 0 - 45°C. Special detectors are available for operation in low and high temperature environments. The detectors are sealed to IP67.

Compliance:

The RMS1000 is CE marked for compliance with the European Electromagnetic Compatibility (EMC) directive.

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Last updated 18-1-2000

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