Mahr Pocket Surf EMD-1500-311 User manual

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Instructions
Portable Surface Roughness Gages
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MAHR GMBH, GERMANY • MAHR FEDERAL INC., USA

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The Pocket Surf
®
gage is a portable
battery-powered instrument for
checking surface roughness with
the measured values displayed on a
digital readout. The instrument can be
used in the laboratory, an inspection
area, in the shop, or wherever on-site
surface roughness gaging is required.
A Pocket Surf kit is furnished in a
fitted case, and includes a Pocket Surf
unit with a General Purpose Probe † and a
125
µ "/3,2 µ m (nominal) Reference
Specimen † plus:
•EBY-1014 9-volt Alkaline Battery
•EPL-1681 Riser Plate, for
calibrating the gage with the
Reference Specimen.
†Part Numbers listed in “Models” table on
next page.
Description
Even though this gage is designed and
built to withstand the rigors of handling
and use, it is a precision instrument and
should be treated with care to assure
measurement accuracy and reliable
performance.
Note: U.S. Patent No. 4,776,212
Product design and specifications subject to change without notice.
Pocket Surf® is a registered trademark of Mahr Federal Inc.
®Mahr Federal Inc. 2000

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Measuring Ranges . . . . . . . . . . . . . . Ra— 1µ" to 250µ"/0,03µm to 6,35µm
Ry— 8µ" to 999µ"/0,2µm to 25,3µm
Rmax — 8µ" to 999µ"/0,2µm to 25,3µm
Rz— 8µ" to 999µ"/0,2µm to 25,3µm
Display Resolution . . . . . . . . . . . . . . 1µ"/0,01µm
Measurement Accuracy . . . . . . . . . Meets ASME B46.1, ISO and DIN
standards and MIL specifications
Digital Readout . . . . . . . . . . . . . . . . . 3-digit LCD display, with “Battery” icon
Traverse Length (Selectable). . . . . . See table on page 9.
Evaluation Length (Selectable) . . . . See table on page 9.
Traverse Speed . . . . . . . . . . . . . . . . . .2"/5,08mm per second
Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . .030"/0,8mm; 2 RC filter
Probe Type . . . . . . . . . . . . . . . . . . . . . Piezoelectric
Maximum Stylus Force
(within displacement range) . . . . . . . 1500mgf/15.0mN
Power . . . . . . . . . . . . . . . . . . . . . . . . . 9-volt consumer-type alkaline battery
Battery Capacity . . . . . . . . . . . . . . . . Approx. 2500 measurements, depending
on frequency/degree of usage
Operating Temperature . . . . . . . . . . 50° to 113°F/10° to 45°C
Storage Temperature . . . . . . . . . . . . –
4° to 149°F/-20° to 65°C
Note: Rmax and Rzper DIN 4768
Specifications
ModelsModels
ModelsModels
Models
Pocket Surf
Kit Model No.
EGH-1019 Probe and PMD-90101 EMD-1500-311
Certified Reference Specimen
EGH-1019 Probe and EMD-90010 EMD-1500-312
Precision Reference Specimen
EGH-1026 Probe and PMD-90101 EMD-1 500-321
Certified Reference Specimen
EGH-1026 Probe and EMD-90010 EMD-1500-322
Precision Reference Specimen

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PocketSurf Measurement Parameters
RaRoughness Average—the arithmetic average height of roughness
irregularities measured from a mean line within the evaluation length (L).
Rmax Maximum Roughness Depth (per DIN) — the largest of the 5 maximum
peak-to-valley roughness depths in 5 successive sampling lengths. In
the illustration below, Rmax (DIN) = Ry 4.
RzMean Roughness Depth (per DIN) — also known as Rtm — the mean
of 5 maximum peak-to-valley roughness depths in 5 successive
sampling lengths.
Note: To fully meet the requirements of DIN 4768 for Rmax and Rz, probes having a stylus radius of
.0002"/5µm are available for use with Pocket Surf models.
MEAN
LINE
EVALUATION LENGTH (5 CUTOFFS)

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RyMaximum Roughness Depth — For the Evaluation Length equalling
one cutoff, it is the vertical distance between the highest peak and the
deepest valley within the sampling length. For the Evaluation Length
equalling 3 cutoffs, it is the largest of the 3 maximum peak-to-valley
roughness depths in 3 successive sampling lengths.
PocketSurf Measurement Parameters (continued)

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Pocket Surf Features
1Digital Display
2 “Start” Button
3Parameter Selection
Switch
4Output Connector
5Battery Compartment Cover
62 “V” Feet (on bottom of unit)
7Probe Holding Block
8Probe
9Protective Cover
10 Inch/Metric Switch
11 Traverse Length Switch

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1. Remove Protective Cover 9 from Pocket Surf base and slide Battery Compartment
Cover 5 off end of Pocket Surf unit.
2. Install/replace battery and replace Battery Compartment Cover.
3. Press and release “Start” button to check battery condition (see next section).
Duracell #MN/1604 and Eveready®Energizer®#522 or other equivalent 9-volt alkaline batteries are suitable
replacements. Avoid non-alkaline or rechargeable batteries because these types do not have sufficient
power.
Pocket Surf Controls and Digital Display
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1. Set Inch/Metric Switch for inch (
µ ") or metric ( µ m).
Set Traverse Length Switch for 1, 3 or 5. Refer to Traverse Length section
for details.
Set Parameter Switch to desired parameter -- Ra, Rmax, or Rz. If the Traverse
Length Switch is set to positions 1 or 3, the Rmax selection will actually calculate
Ry. Also, the Rzselection will not be calculated for positions 1 or 3, since a full 5
cutoffs are required per DIN for both Rmax and Rz.
Parameter Selection Switch
Inch/Metric Switch
Traverse Length Switch
“Start” Button

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In addition to displaying the measured roughness value, the digital readout also
signals other conditions:
2. Immediately after pressing and releasing the
“Start” button, the readout should display the
“Battery” icon and “all 8’s” (full display), indicating
satisfactory battery condition for normal operation.
3. A “low” (weak) battery is indicated by only the
“Battery” icon being displayed on the LCD readout
— no other characters displayed. A dead battery
(or none installed) results in no display at all. In either
instance, remove and replace the battery as directed
in Battery Installation/Replacement section on page 7.
4. When taking a measurement, an
“-H-” or an “-L-” may appear,
indicating that the measured value
is out of range, either too high or too
low. Refer to Specifications section on
page 3 for parameter measuring ranges.
5. If the display “blinks” when a measurement is made, it indicates that the
displayed value has been contaminated by three or more off-scale peaks or
valleys during the measurement. For example, the probe may have traversed
over a scratch or other random irregularity on the surface. Measure again,
with the probe positioned at a different place on the surface.
6. If a malfunction or other error occurs during operation, the readout
will display an error code: “E1”, “E2”, “E3”, “E4” or “E5L”. Refer to
Maintenance & Troubleshooting section on page 24 for details.
Pocket Surf Controls and Digital Display (continued)

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There are three traverse lengths available. For measuring short surfaces such
as o-ring grooves, short lands and shoulders use Switch Positions 1 or 3.
Nominal Number of Cutoffs/
Traverse Length Evaluation Length Switch Position
.075"/2,0mm .030"/0,8mm 1
.135"/3,5mm .090"/2,4mm 3
.195"/5,0mm .150"/4,0mm 5
Cutoff equals .030"/0,8mm.
Traverse Length
Gage Operation
The PocketSurf gage will operate in any one of four different probe positions (see
illustration on next page). Selection of the proper probe position depends on the
application.
When changing probe positions, gently grasp the probe by its body; never handle the
probe by its skid and stylus end.
Prior to operating the gage, its calibration should be checked. Refer to the
Calibration section for details.
Important: During the measuring cycle, the probe stylus and skid should be in
contact with a surface, and the setup should be properly aligned (as outlined in the
following sections). Otherwise, any readings obtained are not valid and are not to be
used for measurement or gage performance evaluation purposes.

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The Pocket Surf gage can be hand held or placed on a surface in any attitude;
it will operate in virtually any position — horizontally, vertically, at any angle in
between, even upside-down. In the “Closed” probe position, the gage can
measure flat surfaces or cylindrical surfaces (O.D.’s) down to
¼"/6,35mm in diameter. However, the workpiece or surface to
be measured must be at least 3½"/89mm long so that
it will span the two “V’s” on the bottom of the
Pocket Surf unit and rest securely
against them.
“Closed” Position“Closed” Position
“Closed” Position“Closed” Position
“Closed” Position
For workpieces or surfaces less than 3½"/89mm long (too
short to span the “V’s”), use of EAS-2584 Bottom Plate (an
optional accessory) is recommended.
“Closed” Position