Model 1621M Trainer’s Guide

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)

Battery Replacement (cont.)

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

Toggle Between Modes

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

Adjust Using Lower Button

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

Enable Search to Screen Cargo, Areas or Personnel

Enable Vibrate Mode for Increased Awareness

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

Blind Mode

Used to Monitor Status of Instrument

Indicates Serial Number and Production Date

PC Communication

Used to Set Up Instrument Save Stored Data Enable or Disable Local Access

to Funtionality

Need: IR Port on PC Software that came with unit