Model 9-7

Ion Chamber Display Unit

Part Number: 48-3689

Features

• Display Range: 0.001 R/hr to 19.99 kR/hr
• Direct Replacement for the Eberline Model RO-7, Adapts to Existing Eberline RO-7 Detectors
• Digital Readout & Controls
• Backlit Display
• Handle & Folding Tripod Stand
• Separate Battery Compartment
• Detectors Have Removable Beta Shields
• Waterproof Detector Housing Option 

The Ludlum Model 9-7 Ion Chamber Display Unit is a digital readout and control unit that can be attached to any compatible ion chamber (sold separately) to provide remote monitoring in high-range beta and gamma fields. This instrument is a direct replacement for the discontinued Eberline Model RO-7, and will work with any of the existing Eberline RO-7 series detectors, extensions, and cables.

The gamma measurement range is 0.001 R/hr to 19.99 kR/hr, covered by four separate detectors. These ion chambers can either be connected directly to the instrument or via rigid extensions and/or flexible cables to achieve the length required. The detectors will remain functional with extensions/cables up to 152 m (500 ft) in length. The Model 9-7 automatically recognizes which detector is connected so no recalibration or adjustment is required when switching detectors. 

The instrument display and controls are very similar to the original RO-7 to minimize any procedural changes or re-training. The backlit LCD displays easily-readable digits with a floating decimal point to indicate the measurement along the R/hr scale. When connected to the highest range detector, a separate kR/hr indicator is prominently illuminated to warn the operator of the higher scale in use. Controls include a rotary switch for selecting instrument on/off and battery status, an LCD backlight switch (lamp on/off), and a zero adjust knob.

Also Available: Model 9-7-1 (PN: 48-3756), a version that displays measurements in Sv/h units.

Note: The Model 9-7 is not RoHS compliant.

• Specifications
• Detectors
• Options
• Documents

• Specifications
• Detectors
• Options
• Documents

Specifications

Compatible Detectors	Sold separately. Ludlum Models: See Detectors tab. Eberline Models: RO-7-LD, RO-7-BM, RO-7-BH
Display	3½-digit LCD with 1.3 cm (0.5 in.) digits, floating decimal point, and negative sign; backlit illumination controlled by switch
Indicators	Battery OK (green lamp) kR/hr range active (red lamp)
Response Time	Approximately 2.5 seconds to 90% of final reading
Controls	OFF, BAT TEST, ON rotary power switch LAMP ON-OFF toggle switch (for display backlight) ZERO ADJUST knob
Power	Two "D" cell batteries, approximately 160 hour battery life
Temperature Range	-20 to 50 °C (-4 to 122 °F)
Humidity	0 to 90%, non-condensing
Construction	Aluminum housing with beige powder coat, includes carrying handle and folding tripod stand
Size (H x W x L)	24.1 x 9.7 x 23.6 cm (9.5 x 3.8 x 9.3 in.), excluding detector
Weight	1.6 kg (3.5 lb), including batteries

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Detectors

Model	9-7-BLD	9-7-BHL-1 *	9-7-BM	9-7-BH
Image
Part Number	47-3693-1	47-3882-1	47-3694	47-3696
Range	0.001 to 1.999 R/hr	0.01 to 19.99 R/hr	0.1 to 199.9 R/hr	0.01 to 19.99 kR/hr
Resolution	0.001 R/hr (1.0 mR/hr)	0.01 R/hr (10 mR/hr)	0.1 R/hr (100 mR/hr)	0.01 kR/hr (10 R/hr)
Linearity	± 10%
Ion Chamber	Aluminum housing, plastic lined thin entry window filled with air at atmospheric pressure; Aluminum housing thickness nominally 1.5 mm (0.060 in.); Acrylic thickness nominally 3.2 mm (0.13 in.)
Active Chamber Volume	50 cm3 (3.1 in.3)	7 cm3 (0.43 in3)	7 cm3 (0.43 in3)	7 cm3 (0.43 in3)
Window	7 mg/cm2 aluminized Mylar
Beta Shield	removable acrylic shield, approximately 9 mm thick
Temperature Range	-20 to 50 °C (-4 to 122 °F)
Humidity	0 to 90%, non-condensing
Size (Dia. x L)	4.5 x 22.1 cm (1.75 x 8.7 in.), including beta shield	4.8 x 14 cm (1.9 x 5.5 in.), including beta shield	4.8 x 14 cm (1.9 x 5.5 in.), including beta shield	4.8 x 14 cm (1.9 x 5.5 in.), including beta shield
Weight	0.3 kg (0.7 lb), including beta shield	0.18 kg (0.40 lb), including beta shield	0.18 kg (0.40 lb), including beta shield	0.18 kg (0.40 lb), including beta shield

* Note: The Model 9-7 requires modification to use the 9-7-BHL-1 detector.

 

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Options

Option	Description	Part Number
Model 9-7 Underwater Housing	Protects probes down to 30.5 m (100 ft.). Available with a 18.3 m (60 ft) or 30.5 m (100 ft.) cable.	With 18.3 m (60 ft) cable: 4536-046 With 30.5 m (100 ft) cable: 4536-047
Extension Cable	4.6 m (15 ft.) long 9.1 m (30 ft.) long 18.3 m (60 ft.) long	8293-689-15 8293-689-30 8293-689-60
Extension Cable with Kellems Grip	30.5 m (100 ft.) long 61 m (200 ft.) long	8293-689-100GR 8293-689-200GR
Rigid Detector Extension	61 cm (2 ft.) long 152 cm (5 ft.) long	4293-843 4293-844

Note: Other cable lengths are available upon request.

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Documents

• Model 9-7 Data Sheet
• Model 9-7 Detectors Data Sheet
• Product Manual
• Model 9-7 CE Certificate
• Detectors CE Certificate

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