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Model 177-84

m177-84_front_500px
m177-84_front_500pxm177-84_back-composite_500px


Model 177-84

Alpha-Beta Benchtop Counter

Part Number: 48-2727

Features

  • Simultaneous Alpha & Beta Counting
  • Independent Alpha & Beta Readouts, Alarm Setpoints & Audible Signatures
  • Automatic Background Subtraction & Updating
  • 50 Hour Battery Backup

The Model 177-84 is a microprocessor based radiation survey instrument used to measure and discriminate low level alpha and beta radiation when used with an alpha-beta scintillation or proportional detector. The instrument has automatic background subtract and automatic background update. It also has an adjustable count timer which can be set from 0 to 120 seconds. An external switch must be connected to the instrument to initiate a count.

The radiation level is displayed on two analog meters. The Alpha meter dial indicates 0 - 1000 cpm on a three-decade log scale. The Beta meter dial indicates 100 - 100,000 cpm on a three-decade log scale. Each channel has its own distinguishable click per event audio tone. Beta events are a low pitch and alpha events are a high pitch. Beta clicks per event can be set at 1 per 1, 10, 100, or 1000. Each channel has its own alarm point which is adjustable from zero to full scale. Alarms are indicated by an audible tone and LEDs.

 

  • Specifications
  • Options
  • Documents
  • Replacement Parts
  • Specifications
  • Options
  • Documents
  • Replacement Parts

Specifications

Compatible Detectors Gas proportional, Dual phosphor scintillation (such as Model 43-93 and Model 43-68)
Linearity ± 10% of true value, typically ± 2% of true value when measured with an electronic pulser
Meters Dual meters (one each for alpha and beta), 1 mA, 2 inch DC movement
Alpha Parameters Threshold -1 to -180 mV
Meter Scale 0 - 1000 cpm
Beta Parameters Threshold -1 to -4 mV
Window Adjustable 4 to 70 mV
Meter Scale 100 - 100,000 cpm
Cross Talk ≤ 1% alpha counts in beta channel
≤ 10% gross counts in alpha channel
Controls Front Panel
  • ACK/Reset button
  • Meter readout mode (HV, Alarm, Ratemeter)
Rear Panel
  • Power On/Off
Status Indicators Green LEDs
  • Updating background
  • Checking
  • Check on
Red LEDs
  • Incomplete
  • Overload
  • Low battery
Inputs Count switch signal input via phone jack TINI-JAX #41
Response Time Beta varies between 1 to 5 s
Alpha varies between 5 to 15 s
Count Time Adjustable between 0 to 120 s in 8 s increments
High Voltage 200 to 2500 Vdc
Power 117 Vac, 60 Hz, and internal rechargable 6 V (sealed-acid) battery, battery life approximately 50 hours
Detector Connectors Series type “C”
Size (H x W x L) 19.1 x 22.9 x 15.3 cm (7.5 x 9 x 6 in.)
Weight 2.3 kg (4.9 lb.)

Options

OptionDescriptionPart Number
 Low Battery Light Indicator Adds a low-battery indicator light to instrument. 4347-155
 4 - 20 mA Output (Isolated) Analog output signal. 4347-437
 Shelf (or Wall) Bracket Mounting bracket for the Model 177-Series of instruments. 7173-078-02

m7328 021 alarm set cover

Alarm Set Cover

This device may be mounted to the Model 177-Series of benchtop counters to provide protection against unintended modifications to the instrument's alarm setting. It is constructed of aluminum and has two drilled holes for screw-mounting it to the instrument. 7328-021

wall mount

Wall Station for Model 43-93 Detector

Wall mount bracket for a Model 43-93 alpha-beta detector. Includes a built-in switch to support background update functionality. 4347-500
Wall Station for Model 43-68 Detector Wall mount bracket for a Model 43-68 alpha-beta detector. Includes a built-in switch to support background update functionality. 4347-501

Documents

  • Data Sheet
  • Product Manual

Replacement Parts

DescriptionPart Number
AC Rustrack Cable 8303-387
DC Rustrack Cable 8303-426
Meter Assembly 4173-166
Rechargeable Batteries 21-9385

Related Products

m177-face2_500
Model 177
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Model 177-50
m177-61-face-mar27-2010_500px
Model 177-61
m3276_w_display_500px
Model 3276
Display #
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