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Overview

38DL PLUS Ultrasonic Thickness Gage:
Advanced Features, Simple Operation, Rugged, Reliable

The 38DL PLUS is an innovative instrument that signals a new era in ultrasonic thickness gaging. Ideally suited for almost every ultrasonic thickness application, this handheld thickness gage is fully compatible with a full line of dual and single element transducers. The versatile 38DL PLUS can be used in applications ranging from wall thinning measurements of internally corroded pipes with dual element probes to very precise thickness measurements of thin or multilayer materials with single element transducers.

The 38DL PLUS comes standard with many powerful but easy-to-use measurement features and a host of application-specific software options. Its sealed case is designed to meet IP67 requirements to withstand the rigors of very wet or dusty environments. The color transflective VGA display provides superior readability from bright sunlight to complete darkness. It features a simple, ergonomic keypad that can be operated with the left or right hand for easy access to all functions.

Key Features

Dual and single element transducer compatibility
Wide thickness range: 0.08 mm (0.003 in.) to 635 mm (25 in.) depending on material and transducer selection
Corrosion thickness gaging with dual element transducers
THRU-COAT® and Echo-to-Echo measurements on painted and coated surfaces
Internal Oxide/Scale software option
Standard resolution of 0.01 mm or 0.001 in. for all transducers
High Resolution software option of 0.001 mm or 0.0001 in. with single element transducers 2.25 MHz to 30 MHz

Multilayer software option for measurements of up to four layers simultaneously
High Penetration software option for attenuating materials such as fiberglass, rubber and thick casting
Thickness, Velocity, and time-of-flight measurements
Differential mode and Reduction Rate mode
Time-based B-scan mode; 10,000 reviewable readings per scan
Olympus High Dynamic Gain technology with digital filters
V-Path Builder for custom V-path compensation
Designed for EN15317

What Makes This Thickness Gage Different From Others?

The 38DL PLUS is designed to meet the challenges of demanding applications and built to withstand tough conditions in the field and on the production floor. Whether you work in very wet or dusty conditions, cold or hot climates, or bright or dark areas, the 38DL PLUS can handle any inspection job. Need an instrument tough enough to tolerate shocks, drops, and rough handling? The 38DL PLUS with its protective rubber boot and designed for IP67 rating is your answer.

Built for Tough Environments

Compact, weighs only 0.814 kg (1.80 lb)
Rugged, designed for IP67
Explosive Atmosphere: Safe operation as defined by Class I, Division 2, Group D, as found in the National Fire Protection Association Code (NFPA 70), Article 500, and tested using MIL-STD-810F, Method 511.4, Procedure I.
Shock tested using MIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 msec Half sine.
Vibration tested using MIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, general exposure: 1 hour each axis.
Wide operating temperature range
Protective rubber boot with gage stand
Color transflective VGA display with indoor and outdoor color settings for superior clarity

Designed for Easy Operation

Simple keypad for right hand/left hand operation
Easy operator interface with direct access to all functions
Internal and External microSD memory card storage
USB and RS-232 communication ports
Alphanumeric data logger with 475,000 thickness readings or 20,000 waveforms
VGA output to connect to computer or monitor
Default/Custom dual element transducer setups
Default/Custom single element transducer setups
Password protected function allows locking of instrument features

Outdoor display setting, A-scan mode

Indoor display setting, B-scan mode

Data Logger and PC Interface

The 38DL PLUS has a full-featured internal bidirectional alphanumeric data logger that is designed to easily collect and transfer thickness readings and waveform data.

Internal memory of 475,000 thickness readings or 20,000 waveforms with thickness readings
32 Character File name
20 Character ID# (TML#)
9 file formats: Incremental, Sequential, Sequential with custom point, 2-D Grid, 2-D Grid with custom point, 3-D Grid, 3-D custom, Boiler, and Manual
The ability to store up to 4 comments (notes) per ID# (TML)
Stores comments (notes) at an ID# or to a Range of ID#'s
Internal and External microSD memory cards
File copy with the ability to copy files between Internal/External microSD memory cards
Standard USB and RS-232 communication
Two-way transfer of both single and dual element transducer setups
Onboard statistical report
Onboard DB Grid View with three programmable colors
GageView™ interface program can communicate with the 38DL PLUS using the USB, RS-232 ports, and can read and write to a microSD memory card.
Direct export of internal files to microSD memory card in Excel compatible CSV (comma-separated values) format

38DL PLUS Ultrasonic Thickness Gage side view

GageView™

The GageView interface program, a Windows-based application, collects, creates, prints, and manages data from the 38DL PLUS.
Creates datasets and surveys
Stored data editing
View dataset and survey files; including thickness readings, gage setup values, and transducer setup values
Download and upload thickness surveys to and from the gages
Export surveys to spreadsheets and other programs
Collecting snapshot screens
Printing reports such as Thickness, Setup Table, Statistics, and Color Grid
Upgrading operating software
Download and upload single and dual element transducer setup files
B-scan review

Onboard DB Grid View with three programmable colors

Standard Package

38DL PLUS digital ultrasonic thickness gage, AC or battery, 50 Hz to 60 Hz
Kits available with standard dual element transducers

Charger/AC adapter (100 VAC, 115 VAC, 230 VAC)
Internal data logger
GageView interface program
Test block and couplant
USB cable
Rubber protective boot with gage stand and neck strap
User's manual
Two-year limited warranty

Measurement features: THRU-COAT, Thru-Paint Echo-to-Echo, EMAT compatibility, Min./Max. mode, two alarm modes, differential mode, B-scan, Application Auto-Recall, temperature compensation, Average/Min. mode

Specifications

Measurements > Dual element transducer measurement mode	Time interval from a precision delay after the excitation pulse to the first echo
Measurements > THRU-COAT^® measurement	Measurement of true metal and coating thicknesses with a single back-wall echo (with D7906-SM and D7908 transducers)
Measurements > Thru-Paint Echo-to-Echo	Time interval between two successive back-wall echoes to eliminate paint or coating thickness
Measurements > Single element transducer measurement modes	Mode 1: Time interval between the excitation pulse and the first back-wall echo Mode 2: Time interval between the delay line echo and the first back-wall echo (with delay or immersion transducers) Mode 3: Time interval between successive back-wall echoes following the first interface echo after the excitation pulse (with delay line or immersion transducers) Oxide: optional Multilayer mode: optional
Measurements > Thickness range	0.080 mm to 635.00 mm (0.003 in. to 25.000 in.) depending on material, transducer surface conditions, temperature, and selected configuration
Measurements > Material velocity range	0.508 mm/μs to 13.998 mm/μs (0.020 in./μs to 0.551 in./μs)
Measurements > Resolution (selectable)	Low: 0.1 mm (0.01 in.) Standard: 0.01 mm (0.001 in.) High Resolution (optional): 0.001 mm (0.0001 in.)
Measurements > Transducer frequency range	Standard: 2.0 MHz to 30 MHz (-3 dB) High Penetration (optional): 0.50 MHz to 30 MHz (-3 dB)
General > Operating temperature range	-10 °C to 50 °C (14 °F to 122 °F)
General > Keypad	Sealed, color-coded keypad with tactile and audible feedback
General > Case	Impact-resistant and water-resistant, gasketed case with sealed connectors. Designed for IP67.
General > Dimensions (W x H x D)	Overall: 125 mm x 211 mm x 46 mm (4.92 in. x 8.31 in. x 1.82 in.)
General > Weight	0.814 kg (1.80 lb)
General > Power supply	AC/DC adaptor, 24 V; lithium-ion battery 23.760 Wh; or 4 AA auxiliary batteries
General > Battery life, lithium-ion	Operating time: minimum 12.6 h, 14 h typical, 14.7 h maximum Fast charge: 2 h to 3 h
General > Standards	Designed for EN15317
Display > Color transflective VGA display	Liquid crystal display, display area 56.16 mm x 74.88 mm (2.2 in. x 2.95 in.)
Display > Rectification	Full wave, RF, half-wave positive, or half-wave negative
Inputs/Outputs > USB	1.0 client
Inputs/Outputs > RS-232	Yes
Inputs/Outputs > Memory card	Maximum capacity: 2 GB External microSD memory card
Inputs/Outputs > Video output	VGA output standard
Internal Data logger > Data logger	The 38DL PLUS identifies, stores, recalls, clears, and transmits thickness readings, waveform images, and gage configuration information through the standard RS-232 serial port or USB port.
Internal Data logger > Capacity	475,000 thickness measurements or 20,000 waveforms with thickness measurements
Internal Data logger > File names, IDs, and comments	32-character file names and 20-character alphanumeric location codes with four comments per location
Internal Data logger > File structures	Nine standard or custom application-specific file structures
Internal Data logger > Reports	On-gage reporting of summary with statistics, Min./Max. with locations, Min. review, file comparison, and alarm report

Software Options

38DLP-OXIDE (U8147014): Code-activated Internal Oxide measurement software
38DLP-HR (U8147015): Code-activated High Resolution measurement software
38DLP-MM (U8147016): Code-activated Multilayer measurement software
38DLP-HP (U8147017): Code-activated High Penetration (low frequency) measurement software
38DLP-EBSCAN (U8147018): Encoded B-scan software

Optional Accessories

38DLP/EW (U8778348): Three-year warranty
1/2XA/E110 (U8767104): Filter adaptor for E110-SB EMAT transducer
38-9F6 (U8840167): RS-232 cable
38-C-USB-IP67 (U8800998): USB cable for IP67 sealed operation
38DLP/RFS (U8780288):Foot switch, factory installed
HPV/C (U8780124): Digital caliper for thickness input for velocity measurements
38DLP-V-CC (U8840172): Cable for digital caliper
EPLTC-C-VGA-6 (U8840035):VGA output cable
MICROSD-ADP-2GB (U8779307): 2 GB External microSD memory card
BSCAN-ENC (U8779522): Encoded B-scan buggy
38DL--ENC-CBC-10 (U8840168): 10 ft encoder cable

Software Features

Thickness Measurements on Internally Corroded Metals

One of the major applications of the 38DL PLUS is measuring the remaining thickness of pipes, tubes, tanks, pressure vessels, hulls, and other structures affected by corrosion or erosion. Dual element transducers are most commonly used for these applications.

Automatic Probe Recognition for standard D79X series dual element transducers
Ten custom dual element transducer setups
Optimized default gain during calibration for dual element transducer
V-Path Builder for custom V-path compensation
Calibration Doubling warning when echo doubling may occur during calibration
THRU-COAT® and Echo-to-Echo measurements on painted and coated surfaces
High temperature measurements; up to 500 °C (932 °F)
Boiler tube and Internal Oxide measurements (optional) with M2017 or M2091 single element transducers
EMAT transducer (E110-SB) for no-couplant measurements of boiler tubes with external oxide/scale buildup

Optional Encoded B-Scan

This powerful optional feature allows the 38DL PLUS to be connected to a linear encoded scanner to generate encoded B-scans. The 38DL PLUS will capture and store the distance traveled information along with corresponding thickness readings. The waveform at the minimum thickness is also captured. The user can select the distance between measurements and select between bidirectional and unidirectional modes. Up to 10,000 thickness readings can be stored in a single B-scan.

thrucoat probe screen

Thru-Coat^® Technology

A single back-wall echo is used to measure true metal thickness. You can display the metal and coating thicknesses, each adjusted for their correct material sound velocities. There is no need to remove paint and coatings from surfaces. THRU-COAT measurements use the D7906-SM, D7906-RM, and D7908 dual element transducers.

Temperature Compensation

Variations in material temperature affect sound velocity and accuracy of thickness measurements. The temperature compensation feature allows you to manually enter the calibration block's temperature and the current (high) temperature at the measurement points. The 38DL PLUS automatically displays the temperature-corrected thickness.

Optional Oxide/Scale Measurement

38DL PLUS uses advanced algorithms to measure the thickness of oxide/scale buildups inside boiler tubes. The gage simultaneously displays the metal thickness of the boiler tube and the thickness of the oxide layer. Knowing the thickness of the oxide/scale helps predict tube life. We recommend using M2017 or M2091 transducers in this application.

V-Path Builder

This new and patented feature allows you to build a custom V-Path compensation curve for almost any dual element transducer. These curves can be saved and recalled along with custom setups for most dual element transducers.

You simply calibrate and enter the known thickness with a minimum of 3 and up to 10 calibration points, and the instrument will create the V-path.

Automatic Probe Recognition

All standard dual element transducers feature Automatic Probe Recognition, which automatically recalls a default V-path correction for each specific transducer.

Thickness Measurements on Plastics, Metals, Composites, Glass, Rubber, Ceramics

When using single element transducers, you can make accurate thickness measurements on metals, plastics, composites, glass, ceramics, and other materials. These transducers are available in a wide range of frequencies, diameters, and connector styles. The High Resolution software option allows you to make very precise measurements at a resolution of 0.0001 in. or 0.001 mm.

Standard resolution of 0.01 mm (0.001 in.) for all transducers
High Resolution software option can display measurements up to 0.001 mm (0.0001 in.) for single element transducers from 2.25 MHz to 30 MHz
High Penetration software option for measurements on attenuating materials such as fiberglass, rubber, and thick castings
Multilayer software option for individual thickness measurements of up to four layers simultaneously
Thickness, Velocity, or time-of-flight measurements
Application Auto-Recall with default and custom setups to simplify thickness measurements

High Penetration Software Option

This option allows you to use low frequency single element transducers (as low as 0.5 MHz) to measure thick or sound attenuating materials such as rubber, fiberglass, castings, and composites.

Multilayer Software Option

This software option calculates and simultaneously displays thickness measurements of up to four individual layers.

It also displays total thickness of selected layers. Typical applications include thickness of barrier layers in plastic fuel tanks, bottle preforms, and soft contact lenses.

Transducers

Transducers for Precision Thickness Gages

Transducers for Corrosion Thickness Gages

Olympus NDT offers a complete selection of transducers, cables, couplants, calibration test blocks, and accessories to meet a wide variety of ultrasonic precision thickness gaging applications.