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Model 30-4

Digital Neutron Survey Meter

Part Number: 48-4191

Features

Multi-Function Digital Display Unit
Low-Weight Device Substitutes for Ratemeter
Simple Switching Between Two Sets of Measurement Units
Moderated Neutron Detector
Range: 0 to 99.9 mSv/h (0 to 9.99 rem/hr)
Display Unit Detaches for Greater Versatility

The Ludlum Model 30-4 joins the Model 30 digital display unit with a 22.9 cm (9 in.) REM ball containing a ³He detector, thereby providing a significant weight reduction and more compact, maneuverable instrument for determining neutron dose rates.Three modes of operation – RATE, MAX, and COUNT – are available for the user. Measurements can be collected in two sets of units (primary and secondary) for RATE and MAX modes in cps, cpm, rem/hr, or Sv/h units. 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.

This instrument features a large, easily-readable LCD (liquid crystal display) that may be rotated for maximum ease of use for the operator. The connecting cable is threaded through the rugged carrying handle to simplify use. In addition the display unit may be detached from REM ball permitting the operator to position the detector and the display unit to best advantage within the limits of the cable length. Other features are an audio warning tone and easy, intuitive, user-friendly design. Splash-resistant construction allows the Model 30 to be used in outdoor environments. The instrument body is constructed of lightweight, durable, high-impact plastic.

Specifications

Indicated Use	Neutron dose rate
Detector	³He proportional detector, 1.6 x 2.5 cm (0.6 x 1.0 in.) (D x L), surrounded by a 22.9 cm (9.0 in.) diameter cadmium loaded polyethylene sphere
Measurement Range	0 to 99.9 mSv/h (0 to 9.99 rem/hr)
Sensitivity (bare AmBe neutrons)	Typically 10 cpm per μSv/h (100 cpm per mrem/hr)
Energy Response	Provides approximate inverse RPG curve for neutrons from thermal through 7 MeV, provides response up to 12 MeV
Linearity	Reading within 10% of actual value
Gamma Rejection (¹³⁷Cs gamma)	< 10 cpm through 0.1 Sv/h (10 R/hr)
LCD Display	3 digit LCD with large 13.4 mm (0.53 in.) digits, low-battery indicator, MAX, ALARM, MUTE Units: (k)cps, (k)cpm, (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 µrem/hr to 999 rem/hr 0.00 µSv/h to 999 Sv/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.
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; Press and hold for OFF MODE: Long press alternates between NORMAL (count rate), MAX (captures peak rate), COUNT (user-selectable preset count time from 0 to 10 min.). Number of modes can be reduced in setup. UNITS: Long press changes the units between count rate (cpm, cps) or dose/exposure (µSv/h, rem/hr)
Response Time	User-selectable from 1 to 60 s, Auto-Response Rate FAST or SLOW, or Fixed FAST and SLOW
Alarms	Count rate, exposure/dose, and scaler alarm setpoints adjustable over the display range
Overload	High count rate saturation protection prevents false display of lower count rates
Dead Time Correction	Employs first and second order corrections for extended performance
Operating Voltage	Approximately 1200 Vdc
Threshold	-2 mV
Audio	Greater than 75 dB at 0.6 m (2 ft), approximately 4 kHz
Click Audio Divide	x1, x10, x100, x1k
Power	Two alkaline or two rechargeable “AAA” batteries
Battery Life	Approximately 100 hours of operation, 24-hour low battery warning
Construction	High-impact plastic with water-resistant rubber seals and separate battery compartment
Working Environment	Splashproof shields for outdoor use
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 3x or IP rating of 52 with audio hole seal option (hole seal option will reduce maximum volume by approximately 10 dB)
Size	Display Unit: 8.5 x 8.0 x 4.8 cm (3.4 x 3.1 x 1.9 in.) (H x W x L) Detector: 22.9 cm (9 in.) diameter REM ball with ³He detector (1.6 x 2.5 cm)(D x L)
Weight	Display Unit: 174 g (0.38 lb) REM Ball Component: 6.6 kg (14.5 lb)

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
Case for Neutron Meters	Rugged transport and storage case.	2310377
Case for Neutron Meters	Rugged transport and storage case. Has wheels and extendable handle.	2311487

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.

To update the firmware on your instrument:

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)

Download the latest Lumic Firmware Updater Software.
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.
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.