Mitutoyo 99MBH001B1 User Manual

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No.99MBH001B1

SERIES No.179

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Digi-Derm

Digital coating

thickness gage

User’s Manual

Read this User's Manual thoroughly

before operating the instrument. After reading,

retain it close at hand for future reference.

CONVENTIONS USED IN USER'S MANUAL

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Safety Precautions

To operate the instrument correctly and safely, Mitutoyo manuals use various
safety signs (Signal Words and Safety Alert Symbols) to identify and warn
against hazards and potential accidents.

The following signs indicate general warnings:

Indicates an imminently hazardous situation which, if not

ANGE

AUTIO

ARNIN

The following signs indicate specific warnings or prohibited actions, or
indicate a mandatory action:

avoided, will result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided,
could result in serious injury or death.

Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury or property damage.

Alerts the user to a specific hazardous situation. The given
example means "Caution, risk of electric shock".

Prohibits a specific action. The given example means " Do not
disassemble".

Specifies a required action. The given example means
"Ground".

i

CONVENTIONS USED IN USER'S MANUAL

On Various Types of Notes

The following types of notes are provided to help the operator obtain reliable
measurement data through correct instrument operation.

1 INTRODUCTION

IMPORTANT • An important note is a type of note that provides information

NOTE A note emphasizes or supplements important points of the

essential to the completion of a task. You cannot disregard
this note to complete the task.

• An important note is a type of precaution, which if neglected
could result in a loss of data, decreased accuracy or
instrument malfunction/failure.

main text. A note supplies information that may only apply in
special cases (e.g.. Memory limitations, equipment configura­tions, or details that apply to specific versions of a program).

TIP A tip is a type of note that helps the user apply the techniques

and procedures described in the text to their specific needs.
It also provides reference information associated with the topic
being discussed.

Mitutoyo assumes no liability to any party for any loss or damage,
direct or indirect, caused by use of this instrument not conforming
to this manual.
Information in this document is subject to change without notice.

© Copyright Mitutoyo Corporation. All rights reserved.

ii

WARRANTY

In the event that the Mitutoyo Digi-Derm should prove defective in workman­ship or material, within one year from the date of original purchase for use, it
will be repaired or replaced, at our option, free of charge upon its prepaid
return to us.

This warranty shall not apply if the product has been subject to fair wear and
tear, abuse through misuse or improper use/handling/storage/maintenance/
service/repair or through adaptation/modification by the original purchaser or
any third party without prior written consent of Mitutoyo or as a result of
damage by an actual disaster or circumstances beyond the control of Mitutoyo.
To obtain service under this warranty the product must be returned to the
nearest Mitutoyo Service Center. Any postage, insurance, or shipping charges
incurred in returning the product for service are the responsibility of the
purchaser.
* This warranty is not transferable and is only valid within the country of the

original purchase.

* You may have additional rights under the laws of country of original

purchase that do not allow the exclusion of implied warranties or the
exclusion or limitation of certain damages. If these laws apply, Mitutoyo's
limitations and exclusions may not apply to you.

iii

CONTENTS

CONVENTIONS USED IN USER'S MANUAL ......................... i

WARRANTY ...........................................................................iii

1 INTRODUCTION .............................................................. 1-1

1.1 Preface ................................................................................. 1-1

1.2 Application ............................................................................ 1-1

1.3 Nomenclature and Function ................................................. 1-2

2 OPERATION..................................................................... 2-1

2.1 Setting Power Source........................................................... 2-1

2.2 Calibration ............................................................................ 2-2

2.2.1 Zero adjustment.....................................................................2-2

2.2.2 Gain adjustment .................................................................... 2-3

2.2.3 Notes on calibration .............................................................. 2-4

2.3 Measurement........................................................................ 2-5

2.3.1 Measurement method ............................................................ 2-5

2.3.2 Holding displayed value .......................................................2-6

2.3.3 Outputting displayed value ................................................... 2-6

2.3.4 Rod stand ..............................................................................2-6

2.3.5 Over indication......................................................................2-6

3 SPECIFICATION AND SAFE-KEEPING .......................... 3-1

3.1 Specifications ....................................................................... 3-1

3.1.1 General specifications ........................................................... 3-1

3.1.2 Output specifications ............................................................3-2

3.2 Safe-keeping ........................................................................ 3-4

1 INTRODUCTION

SERVICE NETWORK

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11

1

11

1.1 Preface1.1 Preface

1.1 Preface

1.1 Preface1.1 Preface

The Mitutoyo Digi-Derm is a coating thickness gage of non-destructive
type with a digital display. If it is connected to the Digimatic Mini­processor, measurements can be printed and processed. Read this op­eration manual carefully before use.

1.2 Application1.2 Application

1.2 Application

1.2 Application1.2 Application

1) No.179-741, 179-745 & 179-7461) No.179-741, 179-745 & 179-746

1) No.179-741, 179-745 & 179-746

1) No.179-741, 179-745 & 179-7461) No.179-741, 179-745 & 179-746

Capable of measuring the thickness of the following types of non­magnetic plating, films, etc. applied to magnetic materials (Iron,
Nickel, Cobalt, etc.):

• Plating: Gold, Copper, Zinc, Tin, Chromium, Lead, Cadmium, etc.

• Paint: Oil-based paint, Lacquer, Synthetic resin, Metallic-coating,

Rubber paint, etc.

• Lining: Resin, Rubber, Tar, Glass, etc.

• Parkerizing, Metal spraying, Oxide film, and other special film

• Film:Metal, Resin, Rubber, Paper or any other non-magnetic film

can be measured using steel base metal as the reference.

INTRODUCTIONINTRODUCTION

INTRODUCTION

INTRODUCTIONINTRODUCTION

1 INTRODUCTION

2) No.179-755 & 179-7562) No.179-755 & 179-756

2) No.179-755 & 179-756

2) No.179-755 & 179-7562) No.179-755 & 179-756

Capable of measuring the thickness of the following types of non­conductive plating, films, etc. applied to non-magnetic materials
(Brass, Copper, Aluminum, etc.):

• Paint: Oil-based paint, Lacquer, Synthetic resin, Rubber paint, etc.

• Lining: Resin, Rubber, Tar, Glass, etc.

• Oxide film, and other special film

• Film: Resin, Rubber, Paper or any other non-conductive film can

be measured using Copper, Brass, or Aluminum base metal as the
reference.

MANUAL No. 99MBH001B

1 - 11 - 1

1 - 1

1 - 11 - 1

1.3 Nomenclature and Function1.3 Nomenclature and Function

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c

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1.3 Nomenclature and Function

1.3 Nomenclature and Function1.3 Nomenclature and Function

1) Main unit1) Main unit

1) Main unit

1) Main unit1) Main unit

Zero adj. volume

Power sw.

Inch/mm

onversion

sw.

Print key
(except for 179-741)

Display
Gain adj. volume

Battery lid

Probe cable

Data output
connector or
Analog outpu
connector
(179-741)

Hold key

AC adaptor jac

1 - 21 - 2

1 - 2

1 - 21 - 2

Rod stand

(Rear view)

MANUAL No. 99MBH001B

1 INTRODUCTION

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e

2) Probe2) Probe

2) Probe

2) Probe2) Probe

Stopper

able Knurled sleeve

Bobbin cas

Core

Fig. 1

Zero adj. volume

Used to set the display to zero.

Gain adj. volume

Used to adjust the Digi-Derm to indicate precisely the thickness of
calibration film.

Print key

Used to output the displayed value to the connected Digimatic Mini­processor. (except for 179-741)

Hold key

Holds and releases the displayed value alternately.

Inch/mm conversion sw.

Converts the displayed mm values to inch values and vice versa.

MANUAL No. 99MBH001B

1 - 31 - 3

1 - 3

1 - 31 - 3

1 - 41 - 4

1 - 4

1 - 41 - 4

MANUAL No. 99MBH001B

OPERATIONOPERATION

OPERATION

OPERATIONOPERATION

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2

22

2.1 Setting Power Source2.1 Setting Power Source

2.1 Setting Power Source

2.1 Setting Power Source2.1 Setting Power Source

The Digi-Derm operates from either dry batteries or AC power source.
Perform the following setup with the Digi-Derm turned

1) Dry Batteries1) Dry Batteries

1) Dry Batteries

1) Dry Batteries1) Dry Batteries

Use four pieces of R6 (SUM-3). First, remove the battery lid on the
bottom of the case by pushing it in the arrow-marked direction, then set
the batteries over the ribbon in the proper polarity (+/-). Pulling the
ribbon removes the batteries.

Ribbon

2 OPERATION

OFFOFF

OFF.

OFFOFF

When the low battery indication "
decimal point indications" are turned on during operation, replace
the batteries with new ones.

2) AC Power Source2) AC Power Source

2) AC Power Source

2) AC Power Source2) AC Power Source

Connect the AC adaptor (Optional) to the AC adaptor jack of the
Digi-Derm, then to the AC power outlet.

MANUAL No. 99MBH001B

Fig. 2

ERRERR

ERR" is displayed or "three

ERRERR

2 - 12 - 1

2 - 1

2 - 12 - 1

2.2 Calibration2.2 Calibration

)

2.2 Calibration

2.2 Calibration2.2 Calibration

Be sure to perform calibration before measurement. Calibration in­cludes two adjustment: zero adjustment and gain adjustment. The fol­lowing is a calibration procedure using the provided reference speci­men as the base metal.

2.2.1 Zero adjustment2.2.1 Zero adjustment

2.2.1 Zero adjustment

2.2.1 Zero adjustment2.2.1 Zero adjustment

(1)Turn the Zero and Gain adj. volume to the approximate center of

each range.

(2)While setting the probe to the specimen surface, turn the Zero adj.

volume until the display becomes zero. When applying the
probe,hold the knurled sleeve of the probe with your fingers and
ensure that the probe is perpendicular, its end completely level
with the specimen surface.

The probe should be applied to a point where a measurement is to be
actually performed.

ZERO

2 - 22 - 2

2 - 2

2 - 22 - 2

(EX.: metric

Reference specimen

Fig. 3

(3)Apply the probe to the same point on the specimen as in (2) sev-

eral times in succession, then check that zero is displayed each
time.

MANUAL No. 99MBH001B

2.2.2 Gain adjustment2.2.2 Gain adjustment

)

2.2.2 Gain adjustment

2.2.2 Gain adjustment2.2.2 Gain adjustment

Perform gain adjustment after zero adjustment.

(1)Place the provided calibration film on the reference specimen.

For accurate measurement, use a calibration film of thickness as
close to that of the coating to be measured as possible.

(2)Applying the probe on the calibration film, turn the Gain adj. vol-

ume until the Digi-Derm indicates exactly the thickness as desig­nated on the film. Refer to 2.2.1 (2) for the way the probe is ap­plied.

The probe should be applied to the same point as used for "Zero
Adjustment".

2 OPERATION

SPAN

(EX.: metric

Reference specimen

(3) Remove the calibration film, then check the zero point (refer to

2.2.1 (3)). Place the film on the specimen again, apply the probe
to the film surface at the same point as applied at (2) several
times, then check that the correct film thickness is displayed each
time.

MANUAL No. 99MBH001B

Calibration film (Ex.: 100µm)

Fig. 4

2 - 32 - 3

2 - 3

2 - 32 - 3

2.2.3 Notes on calibration2.2.3 Notes on calibration

A

2.2.3 Notes on calibration

2.2.3 Notes on calibration2.2.3 Notes on calibration

Although the provided reference specimen was used as a base metal in
the above example to explain calibration procedures, use a base metal
identical in material, shape, and thickness with that of the workpiece
for calibration, for improved accuracy in measurement. If such a base
metal is not available, use one as similar in these three characteristics
as possible to the workpiece to be actually measured.

About the base metal sizeAbout the base metal size

About the base metal size

About the base metal sizeAbout the base metal size

For a flat-surface base metal, more than 30 x 30mm is recom­mended to use for reliable calibration, although the portion of
φ5mm (.2") [for 179-741, 179-745 & 179-746 ] or φ8mm (.3")
[for 179-755 & 179-756] can be measured.

1) Material1) Material

1) Material

1) Material1) Material

The material of the base metal used for calibration should be as similar
to that of the workpiece as possible.

2) Shape2) Shape

2) Shape

2) Shape2) Shape

The shape of the base metal used for calibration should be as similar
to that of the workpiece as possible. Calibration should be performed
at a point where measurement is to be actually performed.

Ex.:Ex.:

Ex.:

Ex.:Ex.:

When taking measurement at point A, calibrate at point A'. The same is
true with the other points in Fig. 5.

'

B'

Coating

A

C'

D'

B

C

D

Base metal

3) Thickness3) Thickness

3) Thickness

3) Thickness3) Thickness

The thickness of the base metal used for calibration should be as simi­lar to that of the workpiece as possible. But a base metal of over 1mm

Fig. 5

Workpiece

in thickness hardly affects thickness measurement.

2 - 42 - 4

2 - 4

2 - 42 - 4

MANUAL No. 99MBH001B

2.3 Measurement2.3 Measurement

2.3 Measurement

2.3 Measurement2.3 Measurement

2.3.1 Measurement method2.3.1 Measurement method

2.3.1 Measurement method

2.3.1 Measurement method2.3.1 Measurement method

If calibration is complete, the Digi-Derm is ready for measurement. It
will indicate the coating thickness on the point where the probe is ap­plied. For accurate measurement, the probe should be applied to the
same point as that where calibration was performed.

Calibration the Digi-Derm regularly at appropriate intervals.

1) Measurement on a curved or round surface1) Measurement on a curved or round surface

1) Measurement on a curved or round surface

1) Measurement on a curved or round surface1) Measurement on a curved or round surface

The V-grooves of a probe allow exact measurement on a curved or
round surface. For measurement on such surface, calibrate the Digi­Derm first in the same conditions as those in which measurement is to
be performed, i.e., using a base metal of the same material, shape and
thickness as that of the workpiece.

V-groove

2 OPERATION

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2) Other notes on measurement2) Other notes on measurement

2) Other notes on measurement

2) Other notes on measurement2) Other notes on measurement

If surface roughness of the base metal is over 3µm Rmax., or the coat­ing thickness is not uniform, the coating thickness should be deter­mined as the arithmetical average of several points on the same surface.

MANUAL No. 99MBH001B

R

Fig. 6

2 - 52 - 5

2 - 5

2 - 52 - 5

2.3.2 Holding displayed value2.3.2 Holding displayed value

T

2.3.2 Holding displayed value

2.3.2 Holding displayed value2.3.2 Holding displayed value

Pressing the Hold key with the probe applied on the measured surface
holds the display with "
analog output is not held in the HOLD state (179-741). To release the
Digi-Derm from HOLD state, press the key again.

2.3.3 Outputting displayed value2.3.3 Outputting displayed value

2.3.3 Outputting displayed value

2.3.3 Outputting displayed value2.3.3 Outputting displayed value

If data print-out and processing are needed, connect the Data output
connector on the Digi-Derm to the Digimatic Mini-processor* (op­tional) with the cable
value to the processor, press the Print key on the Digi-Derm (except
for 179-741) or the data entry key on the processor. Data output can
also be performed in the HOLD state.
*179-741 additionally requires the A/D converter.

2.3.4 Rod stand2.3.4 Rod stand

2.3.4 Rod stand

2.3.4 Rod stand2.3.4 Rod stand

You can raise the rod stand folded in the bottom of the Digi-Derm so as
to incline the front panel. Since the rod stand can easily become de­tached, don't use this stand as a carrying handle or for any purpose
other than as a stand.

2.3.5 Over indication2.3.5 Over indication

2.3.5 Over indication

2.3.5 Over indication2.3.5 Over indication

OVEROVER

If "

OVER" or "

OVEROVER

probe is placed on the measured surface, this means that the thickness
is exceeding the measuring range of the Digi-Derm.

HH

H" or "

HH

No. 936937No. 936937

No. 936937 (optional). To output the displayed

No. 936937No. 936937

Initial displayInitial display

Initial display" (179-741) is displayed when the

Initial displayInitial display

←←

←" (179-741) sigh indication. The

←←

T > Measuring range

Coating

2 - 62 - 6

2 - 6

2 - 62 - 6

Base metal

Fig. 7

MANUAL No. 99MBH001B

3 SPECIFICATION AND SAFE-KEEPING

SPECIFICATION AND

3

SAFE-KEEPING

3.1 Specifications

3.1.1 General specifications

Code No. 179-741 179-745 179-746 179-755 179-756
Workpiece Non-magnetic coating on

magnetic material

Range 1.500mm (.05900") 1.000mm (.03930")
Resolution 0.001mm/.00005"
Accuracy (range)

Display
Output

Min. measuring area
Min. radius of

curvature
Min. thickness of

base metal
Power supply
Power consumption
Battery life Approx. 80 hours under continuous service (When battery

Operation temperature
Dimensions Digi-Derm: 180(H) x 100(W) x 44(D) mm (7.1 x 3.9 x 1.7")

Weight 500g (1.1lbs.), includes batteries

±3µm±1 digit ±2µm±1 digit ±2µm±1 digit

(0-0.1mm) (0-0.1mm) (0-0.1mm)
±3%±1 digit ±2%±1 digit ±2%±1 digit
(0.1-1.1mm) (0.1-1.1mm) (0.1-1.0mm)
±4%±1 digit ±3%±1 digit
(1.1-1.5mm) (1.1-1.5mm)

3.5-digit LCD

Analog output

(1V/fullscale)

φ5mm (.2") φ8mm (.3")

Convex: 3mm (.12") Convex: 7mm (.28")

Concave: 25mm (.98") Concave: 25mm (.98")

Two-way, four dry batteries of SUM-3 or AC adaptor (6V DC)

voltage is down,the message "ERR" will be displayed.

Detector: φ15 x 43(L) mm (.6 x 1.7")

Digimatic Code Output format

(For connection with M-SPC system)

0.3mm (.012")

Approx.120mVA

0 - 40°C

Non-conductive coating on

on non-magnetic material

6-digit LCD

MANUAL No. 99MBH001B

3 - 1

Code No. 179-741, 179-745, 179-746 179-755, 179-756

Standard • SUM-3 ....................................4

accessories • Carrying case .........................1

• Case for films .........................1

•

Base metal, SPC (No. 933038)...... 1• Base metal, ALP (No. 937305) ..... 1

•

Calibration film set (No. 945014)1• Calibration film set (No. 945049). 1
25µm (No.527599) 25µm (No.527599)
50µm (No.527600) 50µm (No.527600)
100µm (No.527601) 100µm (No.527601)
250µm (No.527602) 250µm (No.527602)
500µm (No.527603) 500µm (No.527603)

1000µm (No.527604) 1000µm (No.527604) ....... 1ea.

1500µm (No.685013)....... 1ea.

Optional • AC adaptor
accessories

No.528041 For 100V AC.
No.528041A For 120V AC.
No.528041D For 220V AC with West German AC plug.
No.528041E For 240/220V AC without an AC plug
No.936937 Connection cable for M-SPC
No.732135

Probe for small hole
(For 179-741, 179-745 & 179-746 only)

3.1.2 Output specifications

1) Connector pin assignment

13579

3 - 2

246810

Pin No.

Fig. 8

Signal I/O Description
1 GND --- Ground
2 DATA O Measurement data
3 CK O Clock for transmission
4 RD O Ready for transmission
5 REQ I Request for data transmission

6 - 10 NC --- Not used

MANUAL No. 99MBH001B

3 SPECIFICATION AND SAFE-KEEPING

it

0)

0)

O
m
"

R

C

D

R

R

H

C

D

R

2) Data format

d1 d2 d3 d4 d5 d6 d7 d8 d9 d10 d11

MSD LSD

All "F" (1111)

rdinary
easurement

F" (1111)

Sign
+: 0 (0000)

-

: 8 (0001)

Measurement

Fig. 9

d12 d13

decimal point
3 (1100)

mm: 0 (000

inch: 1 (100

Un

Data consists of 13 digits (d1 thru d13); each digit consists of 4 bits.
Data output to a linked data processor or other peripheral is effected via

0

pin No.2 from d1 to d13 in bit serial, from the LSB (2

) to the MSB (23)

for each digit.

3) Timing chart

Using Print key of Digi-Derm

D

20msec or more

EQ

K

ATA

0.6sec
or less

2sec or less

T0T1T

2

T

50

50

50µsec or more

Fig. 10

Using request signal for dmata transmission from the peripheral with­out using Print key of Digi-Derm

D

2msec or more

MANUAL No. 99MBH001B

EQ

K

ATA

2sec or less

Fig. 11

3 - 3

3.2 Safe-keeping

For long service life of Digi-Derm, observe the following maintenance
points:

• Keep the Digi-Derm clean and avoid moisture in the storage loca­tion.

• Do not apply excessive force or shocks to the Digi-Derm.

• Turn the Digi-Derm OFF after use.

• Remove the batteries from the Digi-Derm when the Digi-Derm is

to be left unused for a long period.

• Avoid rubbing or excessive pressing of the measuring face of the
probe to prevent scratches or deformation. Wear on the measuring
face degrades measuring accuracy. Check the accuracy of your
Digi-Derm in the following manner: 1) prepare two calibration
films of different thickness (e.g.: 50µm and 100µm); 2) calibra­tion the Digi-Derm on the provided reference specimen with one
calibration film (e.g.: 100µm); and 3) make sure that the measure­ments of the other film (e.g.: 50µm) are as accurate as laid out in
"Specification".

3 - 4

MANUAL No. 99MBH001B

3 SPECIFICATION AND SAFE-KEEPING

MANUAL No. 99MBH001B

3 - 5