model 1621m trainer’s guide. general overview model 1621m is a geiger meuller based personal...
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General Overview
Model 1621M is a Geiger Meuller based Personal
Radiation Detector (PRD) Complies with ANSI 42.32 Used for individual monitoring or
Exposure and Exposure Rate Capabable of Storing
Accumulated Exposure and Communicating with a PC
Applications
Emergency Workers / Responders
Nuclear Power Nuclear Medicine
(Radiopharmacy) Health Physics Anti-Terrorism, WMD Detection Event Management Many Others….
Features of Model 1621M
1 Dose Rate Scale (seven segments) for quick visual
2 Dose Rate Indicator (in DER Mode)
3 % Variation in Dose Rate (in DER Mode)
4 Dose Rate Averaging Time
5 “Light/Set” button 6 “Mode” button7 Speaker8 LCD9 IR Port10 Center of Detector11 Battery Compartment
Basic Power-Up
Unscrew Battery Compartment Insert Battery (+) Side First Replace Battery Cover Check Display for Self Test (all
Symbols lit) Wait 1 Minute for Self Test and
Calibration Maximum Sensitivity if Detector
is Facing Outward (on belt clip, etc)
Mode
After Power Up, Unit will Default to Measurement Mode Current Dose Rate (DER) Absorbed Dose (DE) Blind Mode (Display does not
indicate radiation details) Communication Mode (Device is
using IR port)
More Modes
Battery (bat) – Device needs a new battery
Alarm – Thresholds are exceeded
Set Mode – Flashing indicators allow user to set various items
Continuous Monitoring
Unit Continues to Record: Dose Rate Level (DER) Accumulated Dose Absorption
(DE) Time Elapsed with Respect to DE
EXCEPT while in Data-Transfer Mode (using IR Port)
Memory
1621M Stores in Memory: Dose Absorption (DE) Time Elapsed Relative to DE
Measurement Thresholds for Alarms History Files on Dose Rates and
Absorbed Dose
Safety and Usability Note If you expect High Dose Rates,
include new battery (>0.1mS/Hr) If going to Temperatures below -
20C, Display will not function but alarm and storage of data will continue
Avoid unnecessary shock, humidity, chemical, etc to the unit.
Ship sealed and without battery installed
Manager Utilities
Supervisor May: Adjust Alarm Thresholds Reset Absorbed Dose and Related
Time Elapsed Modify Audible Settings (on / off) Permit or Disable Modes of
Operation (DE, DER, Blind, Communication to PC)
Manager Set Up
To Modify Thresholds for Alarm, Supervisor may use Mode and Light Buttons Hold Light Button for 5 seconds Cycle to Alarm 1 or 2 (press Light Button) Cycle to Parameter to Change (units,
values, decimal place) using Light button Change Values using Mode button (press
to increment value, hold for faster cycling of value)
Hold Light Button when done
Advanced Set Up
Use IR Communication to: Enable / Disable modes altogether Download History to PC Modify what Functionality User
can Access (Such as Disable Ability for User to
Dose Absorption and related Time) Develop Operational Protocols for
User Group
Main User Mode 1
Dose Rate (DER) Displays the Following: Measurement in Units (uR/hr,
mR/hr, R/hr) Simple Bar Indication (7
Segments, logarithmic) Averaging Time of DER Value (in
seconds) Coefficient of DER Variation (as a
% value)
Quick Tip: Location of Radiation Source is quickly obtainable by using the DER value and sweeping a subject or area
Main User Mode 2
Absorbed Dose of Radiation (DE) Indicates total absorbed dose
since reset Accumulation Time since reset Reset Both Values by Holding the
Light and Mode Button at the Same Time
In PC Mode, this can be disabled. Also in PC Mode, DE values can be reset.
Quick Tip: Use this
mode before an
event to track total
absorbed dose.
Absorbed Dose Set-Up
Modify the Alarm Thresholds similar to Dose Rate Mode Setup (DER) Hold Light Button to enter ‘adjust’, cycle
values with “Mode” and variables with “Light”
When Complete, Hold “Light” for 5 seconds to exit setup
Threshold 1 is initial Alarm to indicate to user that first threshold is exceeded
Threshold 2 is total allowable absorption This value is used to calculate remaining
allowable stay time