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Model 3276

Multipurpose Digital Meter

Part Number: 48-4160

Features

Uses Either an Internal or External Detector to Measure Alpha, Beta, or Gamma Radiation
Versatile – Can Operate as an Area Monitor or a Frisker
Simple Setup and Use
User-Adjustable Alarms
User-Programmable Units of Measurement, Either U.S. or SI Units
Power: Standard Alkaline (4) “AA” Batteries or 9 Vdc Wall Mount Transformer

The Model 3276 is a versatile instrument that can be used for multiple radiation detection or measurement purposes. It is used with either an internal or an external radiation detector to detect alpha, beta, or gamma radiation in applications such as frisking or area monitoring.

It features a large, backlit, easy-to-read LCD screen and audible alarms and is controlled using a simple four-button interface. The unit body is made of lightweight, rugged aluminum. It is not intended for outdoor use and should be protected from splashing water. The attached metal handle facilitates transportation between sites. The instrument can be wall-mounted for area monitoring applications or mounted to a stand for desktop applications such as frisking (see options).

The Model 3276 can measure radiation in count rate, exposure rate, exposure rate/dose, activity rate, integrated exposure/dose, time-averaged rates, and scaler counts. When used as a frisker, three modes of operation are available – RATE, MAX, and COUNT – which can be selected by pressing the MODE button. When used as an area monitor, only RATE mode is available by default. Measurements can be collected in two sets of units (primary and secondary) for RATE and MAX modes in cps, cpm, Bq, dpm, R/hr, or Sv/h units. The user can switch between the two sets of units by pressing the UNITS button. When used as a frisker with a scintillation detector, a sigma audio mode can be enabled that allows the user to find small increases above the background radiation level.

Instrument setup can be done either through the front-panel controls or via the Lumic Calibration Kit (PN: 4498-1018). Power is supplied by either four alkaline “AA” batteries or a 9 Vdc wall mount transformer. The Model 3276 is shipped ready to use with batteries, a wall transformer, and a calibration certificate.

Specifications

Compatible Detectors	GM, Scintillation, Proportional
LCD Display	3-digit auto-ranging LCD with large 20 mm (0.8 in.) digits. Units: (k)cps, (k)cpm, (k)Bq, (k)dpm, (µ)(m)R(/h), (µ)(m)Sv(/h). Indicators: bar graph, MAX, ALARM, USB, audio, low battery.
Display Range	0.00 cps to 999 kcps 0.00 cpm to 999 kcpm 0.00 Bq to 999 kBq 0.00 dpm to 999 kdpm 0.00 µR/h to 999 R/h 0.00 µSv/h to 999 Sv/h NOTE: Operational display ranges are dependent on the detector and dead time configuration. Minimum and maximum display can be set to limit display to calibrated range.
Linearity	Readings within 10% of true value
Backlight	Continuously on to provide better visibility
User Controls	ON/OFF: Extra-long press to turn ON; Short press to acknowledge alarms; Extra-long press plus 3 seconds to turn OFF UNITS: Short press changes the units from count rate, dose/exposure, or disintegration, an extra-long press to change count time in COUNT mode AUDIO: Short press to adjust audio level MODE: Short press alternates between modes: RATE (displays count rate), MAX (captures peak rate), and COUNT (captures rate or dose readings for a user-selectable preset count time from 0 to 10 min)
Response Time	User-selectable from 1 to 60 seconds, or Auto-Response Rate FAST or SLOW
Alarms	Two count rate, exposure/dose, and count alarm setpoints adjustable over the display range
Overload Protection	High count rate saturation protection prevents false display of lower count rates. “OL” will appear on the display and an audio warning will be triggered.
Loss of Count Protection	After a user-settable time interval (default 60 seconds) of no pulses from detector, the unit will flash a zero reading and the alarm audio will be triggered
Dead Time Correction	Employs first and second order corrections for extended performance
Overrange	If the reading should exceed the predefined detector range, the instrument will flash a maximum reading and trigger an audio warning.
High Voltage	550 Vdc
Threshold	-4 to -100 mV, typically set to -35 mV for GM detectors
Audio	Approximately 4.5 kHz, click audio greater than 65 dB at 0.6 m (2 ft), alarm audio greater than 72 dB
Power	Four alkaline “AA” batteries for portable use, or 9 Vdc input via wall mount transformer (input 100 - 250 Vac, 50 - 60 Hz).
Battery Life	Approximately 50 hours with the backlight ON, 16-hour low-battery warning
Construction	Aluminum housing with powder coat finish and subsurface printed front panel
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 2 or IP rating of 51
Size (H x W x L)	5.8 x 13.5 x 19.1 cm (2.3 x 5.3 x 7.5 in.)
Weight	0.9 kg (2 lb) (excluding detectors and clips)

Configurations

Area Monitor Configurations

Model	Detector	Operating Range	Part Number
3276/1 *	CsI scintillator	0.010 µSv/h - 500 µSv/h (1.0 µR/hr - 50.0 mR/hr) with ¹³⁷Cs	48-4169
3276/2	energy compensated GM	1.0 µSv/h - 50 mSv/h (0.10 mR/hr - 5.00 R/hr)	48-4170
3276/4	energy compensated GM	10 µSv/h - 500 mSv/h (1 mR/hr - 50 R/hr)	48-4171
3276/6	energy compensated GM	40 µSv/h - 1 Sv/h (4 mR/hr - 100 R/hr)	48-4283

* 3276/1 Note: While the detector used in this instrument is sensitive and is often used for detection of near-background levels of radiation, its nonlinear energy response means that dose and exposure measurements may be over/underreported. See Energy Response Curve.

Other Configurations

Model	Description	Part Number
3276 with 44-9	Includes wall mount and Model 44-9 detector for use as a frisker	48-4160-4
3276HFM	Includes: Model 44-25 Hand Monitor Detector Model 44-26 Foot Monitor Detector Stand	48-4160-2
3276HFM with Frisker (with stand)	Includes: Model 44-25 Hand Monitor Detector Model 44-26 Foot Monitor Detector Model 44-9 Detector Stand	48-4160-6
3276HFM with Frisker (with wall mount)	Includes: Model 44-25 Hand Monitor Detector Model 44-26 Foot Monitor Detector Model 44-9 Detector Wall mount	48-4160-1

Options

Option	Description	Part Number
Ludlum Universal Software	Displays radiation levels and alarm statuses from multiple Ludlum instruments. Requires Ethernet option (4498-958).	1370-093
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
RS-232 Option	Adds RS-232 port to instrument. Includes 4.6 m (15 ft) cable.	4498-873
Ethernet Option	Adds Ethernet port to instrument.	4498-958
Relay Option	+12V relay kit.	4498-1007
Dual Relay Option	Relay kit with both form C contacts and +12V.	4498-1005
Model 375 Software	The Model 3276 can be configured to be used with Model 375 software. Click here to view the hardware requirements for each software. Note: Because the Model 375 software uses a fixed unit display, the preferred unit of measurement for the display must be specified when ordering (ex: mR/hr, µSv/h). The Model 3276 minimum and maximum display parameters must also be set to preclude units other than those specified for the software.
Desktop Stand	Metal stand to support instrument for desktop applications.	4498-784
Wall Mount with Detector Cradle with Switch for Model 44-9 (detector not included)	Includes a mounting bracket for the Model 3276 and a detector cradle with a switch for the Model 44-9 detector. (Model 44-9 detector not included.) The audio is silenced while the detector is in the cradle and is enabled when the detector is lifted from the cradle. Dimensions (H x W): 15.5 x 26.1 cm (6.1 x 14.2 in.)	4498-859-02
Wall Mount with Detector Cradle for Model 44-9 (detector not included)	Includes a mounting bracket for the Model 3276 and a detector cradle for the Model 44-9 detector. (Model 44-9 detector not included.) Does not include switch to control audio (see above). Dimensions (H x W): 15.5 x 26.1 cm (6.1 x 14.2 in.)	4498-869
Strobe & Horn	12 V Strobe & Horn assembly with relay Flash Energy: 2 J at 12 VDC (1,000,000 peak effective candlepower) Flash Rate: 60 - 90 flashes per minute Audio: 90 dB Temperature Range: -34 °C to 52 °C (-30 °F to 125 °F) Environmental: Rain tight	4498-1016
Remote Display	Includes Model 272D remote display, RS-232 option, and cable. Note: Because the Model 272D has a fixed unit display, the preferred unit of measurement for the display must be specified when ordering (ex: mR/hr, µSv/h). The Model 3276 minimum and maximum display parameters must also be set to preclude units other than those specified for the Model 272D.	4498-1014
Headphone Jack	Adds a headphone jack to the instrument.	4498-555
Stereo/Mono Headphones	Adjustable stereo/mono headphones.	22-9313

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.