Model 79/2

Stretch Scope Survey Meter

Part Number: 48-4203

Features

• Lightweight - Approximately 1/3 the Weight of Comparable Instruments
• 1.1 m (45 in.) to 4.5 m (177 in.) Telescoping Carbon Fiber Pole
• Energy Compensated GM Detector
• Range: 0.001 mSv/h to 0.04 Sv/h (0.1 mR/hr to 4 R/hr)
• 1 µSv/h (0.1 mR/hr) Display Resolution
• Backlit, Auto-Ranging LCD with Adjustable Viewing Angle
• Simple Green, Yellow, and Red Status Indicators
• 3-Button Intuitive Interface for Easy Operation
• USB Port and All-Digital Calibration

The Model 79/2 Stretch Scope provides the operator with the ability to investigate areas of suspected gamma contamination while remaining at a greater distance from potentially high fields of radioactivity. The 4.5 m telescoping pole allows the attached detector to reach areas difficult to access with other types of instruments.

A large, easy-to-read LCD display rotates to maximize ease of viewing. Padded shoulder strap (included), audio warning tone, and easy, intuitive design are also featured. The unit’s body is made of durable, high-impact plastic with splash-resistant construction, allowing outdoor use.

The Model 79/1 has three modes of operation – RATE, MAX, and COUNT. Measurements can be collected in two sets of units (primary and secondary) for RATE and MAX modes in cps, cpm, Sv/h, mrem/hr, and R/hr units. The user can choose between two sets of units by simply pressing the Units button. An internal switch is used to enable or disable the front-panel setup feature to protect desired settings from inadvertent modification. Setup is also available via software from Ludlum Measurements (see the Options tab).

• Specifications
• Options
• Documents
• Firmware Updates
• Video
• Configurations

• Specifications
• Options
• Documents
• Firmware Updates
• Video
• Configurations

Specifications

Detector	Internal energy-compensated GM
Detection Range	0.001 mSv/h to 0.04 Sv/h (0.1 mR/hr to 4 R/hr)
Energy Response	Within 25% of true value from 60 keV to 3 MeV
Linearity	± 15% full range (dose rate)
LCD Display	Auto-ranging, 3-digit LCD with large 13.4 mm (0.53 in.) digits, low-battery indicator, MAX, ALARM, MUTE Units: (k)cps, (k)cpm, (k)Bq, (k)dpm, (μ)(m)R(/h), (μ)(m)Sv(/h), (μ)(m)rem(/h)
Display Range	0.0 cps to 99.9 kcps 0.00 cpm to 999 kcpm 0.00 Bq to 99.9 kBq 0.00 dpm to 999 kdpm 0.00 μR/h to 999 R/h 0.00 μSv/h to 999 Sv/h 0.00 μrem/h to 999 rem/h Display range can be set to limit display to calibrated range.
Backlight	Built-in ambient light sensor automatically activates low-power LED backlight, unless internal dipswitch is set to continuous-on (will reduce battery life). Alarm light intensity varies based on ambient light levels.
User Controls	ON/OFF/ACK: Long press to turn ON; Tap to acknowledge alarms and silence alarm tone; Press to reset Sigma Audio alarm, turn "click" audio On/Off, turn Sigma Audio beep On/Off; Hold for OFF Units: Long press changes the units between primary and secondary units Mode: Long press alternates between NORMAL (count rate), MAX (captures peak rate), and COUNT (user-selectable preset count time from 0 to 10 min.). Number of modes can be reduced in setup.
Response Time	User-selectable from 1 to 60 seconds, Auto-Response Rate FAST or SLOW, or Fixed FAST and SLOW
Alarms	Alarm setpoints adjustable over the display range
Overload	High count rate saturation protection to prevent the false display of lower count rates
Zero Protection	After a user-settable number of seconds of no pulses from detector, the instrument will flash zero reading and the alarm audio will be triggered
Dead Time Correction	Employs first and second order corrections for extended performance
Audio	Greater than 75 dB at 0.6 (2 ft), approximately 4 kHz
Click Audio Divide	x1, x10, x100, x1k
Power	Two alkaline or two rechargeable “AAA” batteries (instrument does not support in-device charging)
Battery Life	Approximately 100 hours of operation, 24-hour low battery warning
Construction	Meter: High-impact plastic with separate battery compartment Pole: Carbon fiber, telescoping
Temperature Range	-20 to 50 °C (-5 to 122 °F) May be certified for operation from -40 to 65 °C (-40 to 150 °F)
Environmental Rating	NEMA rating of 4x or IP rating of 65
Size (H x W x L)	20.3 x 8.1 x 114 cm (8 x 3.2 x 45 in.) retracted, 4.5 m (177 in.) fully extended
Weight	1.4 kg (3 lb), including batteries and shoulder strap

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Options

Option	Description	Part Number
Lumic Calibration Kit	Lumic Calibration Software allows the reading and writing of important parameters via a USB port in the Model 3000 Series and Model 30 family of instruments. This software also includes a calibration wizard (guides the user through calibration steps) and a plateau wizard (determines the optimal detector operating voltage). The kit includes Lumic Calibration Software versions 1.0 and 2.0, a Model 3000 Series USB cable, and a Model 30 family USB cable.	4519-865
Lumic Configuration Kit	Lumic Configuration Software allows the reading and writing of important parameters via a USB port in the Model 3000 Series and Model 30 family of instruments. Does not include calibration or plateau wizards. The kit includes the Lumic Configuration Software, a Model 3000 Series USB cable, and a Model 30 family USB cable.	4519-747
Headphone Jack	Adds headphone jack to instrument.	4498-697
Model 79-Series Case	Rugged, dust- and waterproof transport and storage case.	2312979
Audio Hole Seal Option	Reduces audio volume output.	4498-913
Decontamination Sleeve	Protective plastic sleeve to cover pole and detector.	4272-630

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Documents

• Data Sheet
• Product Manual

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Firmware Updates

In order to use the latest Lumic Calibration Software*, you may need to update the firmware on your instrument. (All new instruments will be compatible with the latest software version.) Use the table below to determine the firmware requirement for your instrument.

Software Version	Compatible Models	Required Firmware
Lumic 1.0	30, 30-4, 30-6, 30-7, 35, 79	2.x or lower
	3000, 3001, 3005, 3006, 3019, 3276	N34 or lower
	3002, 3277	N12 or lower
Lumic 2.0	30, 30-4, 30-6, 30-7, 35, 79	3.x or higher
	3000, 3001, 3005, 3006, 3019, 3276	N40 or higher
	3002	N20 or higher
	3003, 3014, 3078	N/A

*Note: If you purchased the original Lumic 1.0 software, you are eligible for a free copy of Lumic 2.0. Please contact your local sales representative or Ludlum Measurements to receive your copy.

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To update the firmware on your instrument:

1. Download the appropriate instructions file (PDF) for your instrument.
   IMPORTANT: The firmware update instructions are model number specific. You must use the instructions for your specific instrument model. See table below.
   
   

   Model	Instructions File
   30, 30-4, 30-6, 30-7, 35, 79	Lumic Firmware Update Instructions (Model 30/35/79 Series)
   3000, 3001, 3002, 3005, 3006, 3019, 3276	Lumic Firmware Update Instructions (Model 3000 Series, Gen 1)
   3003, 3014, 3078	Lumic Firmware Update Instructions (Model 3000 Series, Gen 2)

2. Download the latest Lumic Firmware Updater Software.
3. Determine the printed circuit board number your instrument has. To do this, you must open the instrument can and find the number on the circuit board.
4. Using the drop-down selectors below, select your instrument model and printed circuit board number. This will populate a list of available firmware downloads for your instrument.

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Video

Models 30, 35, and 79 Device Menu Overview

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Configurations

Model	Detector	Range
Model 79	Energy-Compensated GM Detector	10 µSv/h to 10 Sv/h (1 mR/hr to 1000 R/hr)
Model 79/1	CsI(Tl) Scintillator Detector	0.01 µSv/h to 500 µSv/h (1 µR/hr to 50 mR/hr)
Model 79/2	Internal Energy-Compensated GM Detector	1 µSv/h to 10 mSv/h (0.1 mR/hr to 1 R/hr)

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