Checkline STM User Manual

Tensions that exceed the tension range of the instrument by more than
100% may cause permanent damage to the movement and must be
avoided under any circumstances.

This device must not be operated in explosion hazard areas and must
not come into contact with aggressive substances.

– 4 – – 1 –

6.0 WARRANTY

ELECTROMATIC Equipment Co., Inc. (ELECTROMATIC) warrants to the original
purchaser that this product is of merchantable quality and confirms in kind and quality with
the descriptions and specifications thereof. Product failure or malfunction arising out of any
defect in workmanship or material in the product existing at the time of delivery thereof
which manifests itself within one year from the sale of such product, shall be remedied by
repair or replacement of such product, at ELECTROMATIC’s option, except where unautho­rized repair, disassembly, tampering, abuse or misapplication has taken place, as determined
by ELECTROMATIC. All returns for warranty or non-warranty repairs and/or replacement
must be authorized by ELECTROMATIC, in advance, with all repacking and shipping
expenses to the address below to be borne by the purchaser.

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE WARRANTY
OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE OR
APPLICATION. ELECTROMATIC SHALL NOT BE RESPONSIBLE NOR LIABLE FOR
ANY CONSEQUENTIAL DAMAGE, OF ANY KIND OR NATURE, RESULTING FROM
THE USE OF SUPPLIED EQUIPMENT, WHETHER SUCH DAMAGE OCCURS OR IS
DISCOVERED BEFORE, UPON OR AFTER REPLACEMENT OR REPAIR, AND
WHETHER OR NOT SUCH DAMAGE IS CAUSED BY MANUFACTURER’S OR
SUPPLIER’S NEGLIGENCE WITHIN ONE YEAR FROM INVOICE DATE.

Some State jurisdictions or States do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation may not apply to you. The duration of any
implied warranty, including, without limitation, fitness for any particular purpose and mer­chantability with respect to this product, is limited to the duration of the foregoing warranty.
Some states do not allow limitations on how long an implied warranty lasts but, not with­standing, this warranty, in the absence of such limitations, shall extend for one year from the
date of invoice.

ELECTROMATIC Equipment Co., Inc.

600 Oakland Ave. Cedarhurst, NY 11516—USA

Tel: [phone]/ Tel: [phone]/ Fax: [phone]

Every precaution has been taken in the preparation of this manual. Electromatic Equipment Co., Inc.,
assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting
from the use of information contained herein. Any brand or product names mentioned herein are used for
identification purposes only, and are trademarks or registered trademarks of their respective holders

1.0 INTRODUCTION

The STM-50 Screen Tension Meter is designed to measure how taut a woven
material is when tension has been applied in two directions at right angles to
each other, as in the case of a screen printing frame.

The measuring surface on the bottom of the instrument is fitted with a one­inch bar indentor placed midway between two outer “reference” bars spaced
two inches apart. When the instrument is placed on the material, the greater
the tension, the more the bar will be pushed in and the greater the reading on
the scale.

1.1 Unpacking

Unpack the STM-50 carefully and inspect it for any damage.
If damage is found, contact Electromatic immediately by telephone
at 516-295-4300 or send email to [e-mail].

1.2 Complete Kit

STM-50 Screen Printing Tension Meters are supplied as a complete kit,
including:

• Instrument

• Operating manual

• Calibration certificate
without data

• Foam-fitted carrying
case

WARNING

– 2 –

2.0 OVERVIEW

2.1 Tension Range Markers

The STM-50 is equipped with two adjustable Tension Range Markers
that can be used to mark the upper and lower limits of the most
frequently used tension range

Scale

Instrument

Moveable Outer Ring

Measurement Pointer

Adjustable Markers

Fig. 1

Fig. 2

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3.0 VERIFYING CALIBRATION

1. To confirm the calibration, place
the STM-50 on a glass plate and
press down (see Fig. 3).

2. The scale pointer should make
one full turn on the scale, from
zero to zero, when you press
down on the instrument. If it
does not, contact Electromatic
for assistance.

4.0 TAKING A MEASUREMENT

1. Place the instrument on a flat surface and make sure that the Measurement
Pointer lines up with the zero position on the scale. If it does not, rotate the
Outer Ring carefully, moving the Zero Position Marker until it lines up
with the Measurement Pointer.

2. Place the STM-50 on the screen web as shown in Fig 1. Tap the screen
web lightly with your hands a few times to compensate for any mechanical
friction cause by the instrument. This will help to ensure repeatable
measurements.

3. Press down firmly on the STM-50. The Measurement Pointer will show
the screen tension directly in N/cm.

5.0 SPECIFICATIONS

Tension Range 6–50 N/cm
Dimensions 3” x 1.8” x 4.5”

(75 x 46 x 115mm)

L x W x H

Weight (approx) 16.9 oz

(480 g)

Fig. 3

Smooth Glass Plate