Model 9-7

High Range Ion Chamber Survey Meter

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.

• Specifications
• Detectors
• Options
• Documents

• Specifications
• Detectors
• Options
• Documents

Specifications

Detection Range	Depends on detector connected, see optional detector list below
Compatible Detectors	Ludlum Models 9-7-LD (Low Range: 0.001 to 1.999 R/hr) 9-7-BM (Mid Range: 0.1 to 199.9 R/h) 9-7-BH (High Range: 0.01 to 19.99 kR/hr) Eberline Models RO-7-LD RO-7-BM RO-7-BH
Display	LCD, 3 1/2 digits, 1.3 cm (0.5 in.) high, includes decimal point and minus sign, backlit illumination provided by activating separate user-controllable switch
Indicators	Low battery alert kR/hr range active
External Controls	3-position rotary switch for instrument OFF, BAT TEST, and instrument ON Zero adjust control Display backlight on/off switch
Response Time	Approximately 2.5 s to 90% of final reading on all ranges
Temperature Range	-20 to 50 °C (-4 to 122 °F)
Humidity	0 to 90%, non-condensing
Power	2 "D" cell batteries
Battery Life	160 hours
Construction	Aluminum with beige powder coat case with separate battery compartment and accompanying front access door, includes folding tripod stand and carrying handle
Size (H x W x L)	24.1 x 9.7 x 23.6 cm (9.5 x 3.8 x 9.3 in.)
Weight	1.6 kg (3.5 lb), including batteries

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

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Detectors

	Model 9-7-BLD	Model 9-7-BHL-1	Model 9-7-BM	Model 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

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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	8293-689-15
Extension Cable	9.1 m (30 ft.) long	8293-689-30
Extension Cable	18.3 m (60 ft.) long	8293-689-60
Detector Extension	61 cm (2 ft.) rigid detector extension	4293-843
Detector Extension	152 cm (5 ft.) rigid detector extension	4293-844

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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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