Troxler 3216 User manual

Instruction Manual
MODEL 3216
ROOF MOISTURE
GAUGE
Troxler Electronic Laboratories, Inc.
3008 Cornwallis Rd. ·P.O. Box 12057
Research Triangle Park, NC 27709
Phone: 1.877.TROXLER
Outside the USA: +1.919.549.8661
Fax: [phone]
www.troxlerlabs.com

Troxler Gauges are protected by U.S.
and foreign patents
Copyright © 1981 - 2006
Troxler Electronic Laboratories, Inc.
All Rights Reserved
No part of this manual may be reproduced or
transmitted in any form or by any means, electronic
or mechanical, including photocopying, recording,
or information storage and retrieval systems, for
any purpose without the express written permission
of Troxler Electronic Laboratories, Inc.
PN 103367
October 2006
Edition 4.1

NOTES
SAFETY ALERT SYMBOL
The Safety Alert Symbol shall appear within this manual. Wherever
it appears in this manual or on safety signs affixed to the
machine, this is to make all aware of the potential for personal
injury and to be cautious when these images are present.
Always observe all WARNING, CAUTION, and NOTE recommendations
listed within this manual before operating the machine.

TROXLER SERVICE CENTERS
Troxler Corporate Headquarters
3008 Cornwallis Road
P.O. Box 12057
Research Triangle Park, NC 27709
Phone: 1.877.TROXLER (1.877.876.9537)
Outside the U.S.A.: +1.919.549.8661
Fax: [phone]
Web: www.troxlerlabs.com
Technical Support
Phone: 1.877.TROXLER (1.877.876.9537)
E-mail: [email protected]
Midwestern Branch Office
1430 Brook Drive
Downers Grove, IL 60515
Fax: [phone]
Western Regional Branch Office
11300 Sanders Drive, Suite 7
Rancho Cordova, CA 95742
Fax: [phone]
Southwestern Branch Office
2016 East Randol Mill Road
Suite 406
Arlington, TX 76011
Fax: [phone]
Florida Service Center
2376 Forsyth Road
Orlando, FL 32807
Fax: [phone]
Canadian Branch Office
7125 Pacific Circle, Unit 13
Mississauga, Ontario L5T-2A5
Canada
Fax: [phone]
Troxler European Subsidiary
Troxler Electronics GmbH
Gilchinger Strasse 33
D.82239 Alling nr.
Munich, Germany
Phone: ++49.8141.71063
Fax: ++49.8141.80731
E-mail: [email protected]

i
TABLE OF CONTENTS
I. INTRODUCTION AND SPECIFICATIONS
I-A. Introduction . . . . . . . . . . . . . . . 1-1
I-B. Definition of Terms . . . . . . . . . . . 1-2
I-C. Specifications . . . . . . . . . . . . . . 1-2
II. OPERATING INSTRUCTIONS
II-A. Getting Acquainted . . . . . . . . . . . . 2-1
II-B. Control Functions and Operations . . . . . 2-1
II-C. Test Functions . . . . . . . . . . . . . . 2-2
III. FIELD MEASUREMENTS
III-A. Data Collection . . . . . . . . . . . . . 3-1
III-B. Manual Analysis of Data . . . . . . . . . 3-4
III-C. Computer Aided Analysis of Data . . . . . 3-11
III-D. Vertical Wall Measurements . . . . . . . . 3-12
IV. SENSITIVITY DATA ................. 4-1
V. PERIODIC MAINTENANCE
V-A. Battery Charging . . . . . . . . . . . . . 5-1
V-B. Cleaning ................. 5-1
V-C. Internal Condensation . . . . . . . . . . 5-1
V-D. Gauge Disassembly . . . . . . . . . . . . 5-2
V-E. Leak Test Procedure . . . . . . . . . . . 5-2
VI. SERVICE
VI-A. Equipment Required . . . . . . . . . . . . 6-1
VI-B. Gauge Electronics . . . . . . . . . . . . 6-2
VI-C. Statistical Stability . . . . . . . . . . 6-5
VI-D. Troubleshooting Hints . . . . . . . . . . 6-7
VI-E. Service Centers . . . . . . . . . . . . . 6-8
VII. PARTS LIST
VII-A. Replacement Parts . . . . . . . . . . . . 7-1
VII-B. Accessories . . . . . . . . . . . . . . . 7-1
VIII. THEORY OF MEASUREMENT
VIII-A. Neutron Radiation and Matter . . . . . . . 8-1
VIII-B. Moisture Geometry . . . . . . . . . . . . 8-3
IX. FACTORY CALIBRATION
IX-A. Moisture Calibration . . . . . . . . . . . 9-1
IX-B. Moisture Performance Parameters . . . . . 9-2
X. RADIATION THEORY AND SAFETY
X-A. Radiation Theory . . . . . . . . . . . . . 10-1
X-A-1. Atomic Structure . . . . . . . . . . . . . 10-1
X-A-2. Radiation Theory . . . . . . . . . . . . . 10-2
X-A-3. Radiation Terminology . . . . . . . . . . 10-2
X-B-1. Radiation Statistics . . . . . . . . . . . 10-2
X-B. Radiation Safety . . . . . . . . . . . . . 10-3
X-B-1. Types of Radiation . . . . . . . . . . . . 10-3
X-B-2. Limiting Exposure . . . . . . . . . . . . 10-4
X-B-4. Monitoring Radiation . . . . . . . . . . . 10-5

ii
Table of Contents (cont'd)
X-B-4. 3216 Radiation Profile . . . . . . . . . . 10-6
X-B-5. Source Encapsulation . . . . . . . . . . . 10-7
X-B-6. Emergency Procedures . . . . . . . . . . . 10-7
XI. TRANSPORTATION AND SHIPPING
XI-A. Requirements . . . . . . . . . . . . . . . 11-1
XI-A-1. Certificate of Competent Authority . . . . 11-1
XI-A-2. Results of Type A Package Testing . . . . 11-2
XI-A-3. Emergency Response Sheet . . . . . . . . . 11-2
XI-A-4. Emergency Response Telephone Number . . . 11-2
XI-A-5. Labeling Requirements . . . . . . . . . . 11-2
XI-A-6. "Bill of Lading" Requirements . . . . . . 11-2
XI-A-7. Locking or Sealing of Package . . . . . . 11-3
XI-A-8. Inspection of Package Prior to Shipment . 11-3
XI-A-9. Accident Notification Requirements . . . . 11-3
XI-A-10 Hazmat Training . . . . . . . . . . . . . 11-3
XI-B. Shipping Forms . . . . . . . . . . . . . . 11-3
APPENDIX A
BASIC Listing for Standard Deviation . . . . . . . AI
Sample Output from Standard Deviation Program . . . AII

iii
LIST OF ILLUSTRATIONS
Figure Description Page
3-1 Gridded Roof Plan 3-3
3-2 Roof Measurement Data 3-3
3-3 Histogram of Sample Data 3-4
3-4 Normal Distribution With
Confidence Limits
3-5
3-5 Normal Distribution Overlaying
Histogram
3-6
3-6 Standard Deviation for Grouped
Data
3-7
3-7 Percent Moisture Correlation Graph
Data
3-8
3-8 Graphic Interpretation of Roof
Survey
3-9
3-9 Computer Aided Plot 3-11
5-1 Leak Test Analysis Form 5-3
6-1 Interior Layout 6-3
6-2 Block Diagram of Gauge Electronics 6-4
6-3 Statistical Test Data 6-5
8-1 Neutron Interaction Data 8-3
8-2 Effect of Neutron Source-Detector
Distance
8-4
8-3 Effect of Moisture on Depth of
Measurement
8-5
9-1 3216 Calibration Data 9-4
9-2 Graphic Interpretation of Moisture
Calibration
9-6
10-1 Diagram of an Atom 10-1
10-2 Variation of Radioactive Emission 10-3
10-3 Effect of Distance on Exposure 10-4
10-4 3216 Radiation Profile 10-6
11-1 Sample Intra-company "Bill of
Lading"
11-4
11-2 Sample Common Carrier "Bill of
Lading"
11-5
11-3 Sample Shipper's Declaration of
Dangerous Goods
11-6
11-4 Sample Federal Express Form 11-7

iv
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TROXLER 1-3
I-C-3. CALIBRATION SPECIFICATIONS
Number of Standards 2
Accuracy of Standards ±4.0%
I-C-4. RADIOLOGICAL SPECIFICATIONS
Neutron Source 1.48 ± 10% GBq
(40 ± 10% mCi)
70,000 n/sec yield,
TEL A-102451
Source Form Stainless steel,
encapsulated
Source Classification ANSI-C54444
per ANSI N542-1977
Shielding Lead and Polyethylene
Maximum Surface Dose Rates See Radiation Profile on
page 10-6
Shipping Case DOT 7A, Type A, Yellow II
Label, 0.1 TI
Special Form Approval Am-241, SPECIAL FORM
Certificate GB:SFC 7
Gauge Classification per ANSI-54-685-685-R2
ANSI N538-1979
I-C-5. ELECTRICAL SPECIFICATIONS
Time Accuracy and Stability ± 0.005% ± 0.0002%/°C
Power Supply Stability ± 0.01%/°C
Battery Capacity 14 W-hr
Charge Source 115/230 V, 50-60 Hz
or 12-15 VDC
Battery Recharge Time
AC Charger 14 hr
DC Charger 3 hr
LCD 4 digits
Largest Number Displayable 9999
Count Registers 1
Power Consumption 0.08 W
Power Consumption after 0.001 W
Automatic Battery Cutoff
Battery packs are fully protected against overcharge and
overdischarge. Low Battery alarm is indicated on the display
several hours prior to automatic cutoff.

3-2 TROXLER
III-A-2. LAYOUT GRID ON ROOF
The grid pattern (at the selected size) must be laid out
on the roof. Paint, strings, marked ropes, or other
methods can be used to define the grid intersections on
the roof.
One popular method is to use two marked ropes, placed
parallel on opposite sides of the roof. A third marked
rope is stretched between the two parallel ropes. With
spray paint can spot the roof at each marking on the
rope. The "marking stick" listed in the Accessories
Parts List (Section VII-B) is especially useful for this
purpose.
III-A-3. DRAWING OF ROOF PLAN
Make a scaled drawing of the roof's top view. Note on
this drawing all roof structures (drains, heating and
air conditioning units, ventilation shafts, etc.). If
there are no roof structures or other details that
indicate building orientation, then note the north
orientation on the drawing.
Any roof structures the user wishes included on a plot
must also by shown on the roof plan.
III-A-4. COLLECT MEASUREMENT DATA
Set the POWER/TIME switch to the desired accumulation
time period. Use the gauge to make a measurement count
at each grid intersection. Record this count at the
correct position.
III-A-5. CUT CORE SAMPLES
Nuclear gauges register relative hydrogen levels. If
absolute moisture levels are needed, one must correlate
count rates and actual moisture levels. Correlation is
normally done via core samples.
The core samples should be chosen to include the widest
range of count rates possible. The roof plan count rate
data will be useful in choosing where to cut core
samples. If a limited number of core samples are to be
cut, then they should be made at sites (determined from
the count data) that indicate a transition from dry to
wet.