Checkline DXN User Manual

ELECTROMATIC

E Q U I P M E N T C O., I N C.

600 Oakland Ave., Cedarhurst, NY 11516–U.S.A.
TEL: [phone] • FAX: [phone]

CHECK•LINE

®

INSTRUMENTS

CHECK•LINE

®

BY ELECTROMATIC

DXN

Operating Instructions

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CONTENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page

1.0 Overview & Operating Principle . . . . . . . . . . . . . . . 2

2.0 Operating Elements . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.0 Thickness Compensation . . . . . . . . . . . . . . . . . . . . . 4

4.0 Quick Start Instructions . . . . . . . . . . . . . . . . . . . . . 5

5.0 Calibration Notes . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5.1 Calibration with “Standard” Filaments

5.2 Special Calibration

5.3 NIST Calibration

5.4 Calibration Verification Schedule

6.0 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

6.1 High-Speed Guide Rollers

6.2 Lever Assembly

6.3 Air Dashpot Damping

7.0 Model Data & Specifications . . . . . . . . . . . . . . . . . . 12

7.0 DXN MODEL DATA & SPECIFICATIONS

Accuracy* ± 1% of full scale or

± 1 graduation mark
on scale

Diameter of Scale 54 mm

Maximum Speed

(standard) 2000 m/ min
(optional) 3500 m/ min (K)
(optional) 5000 m/ min (HS)

Outer roller distance, c:c

DXN-30 to DXN-1000 EX 38 mm
DXN-200 to DXN-10K 100 mm
DXN-2K 150 or 200 mm
DXN-30K to DXN-50K 250 mm

Roller material

(standard) Hard-coated aluminum
(optional) Hardened steel (ST)

Ceramic (CE)
Phenolic (PH)

Housing material Die-cast aluminum

Dimensions 260 x 72 x 44 mm

(10.2 x 2.8 x 1.7 in.)

Weight 700 g (1.5 lbs.), approx.

* Using factory standard materials and procedures. Special calibration using

customer sample is available.

Specifications subject to change without notice.

OI803N

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1.0 OVERVIEW & OPERATING PRINCIPLE

DXN Tension Meters are hand-held, mechanical
instruments which accurately measure the running as
well as static tensions of a wide variety of process
materials including yarns, fibers, wires, optical fibers,
tapes, etc. They employ the 3-roller principle for
tension measurement where the outer two reference
guide rollers remain fixed during measurement to
establish a wrap angle over the middle sensing roller.
The middle roller, acting against an internal
calibrating spring, is displaced relative to the running
line tension. This displacement is converted to a rotary
motion to turn a pointer on a scale to give a reading in
grams tension.

6.3 Air Dashpot Damping

DXN Tension Meters incorporate a moderate amount
of movement damping to smooth out some high fre­quency tension fluctuation. However, where process
fluctuations result in rapid pointer swings which make
it difficult or near impossible to read the scale, an
optionally-available Air Dashpot Damping mechanism
can be provided to
slow down the pointer
swings to permit a
reading. In setting up
the mechanism, it is
best to set the damp­ing rate just to
the point where a
readable pointer
results with minimal
pointer swings. The amount of damping is set by turn­ing the small slotted screw or hex-head screw of the
damping assembly located near the guide-roller mount­ing bracket. The Air Dashpot must be installed at time
of original manufacture. It cannot be added later.

CAUTION: Do not set damping rate too high as
this will damage the movement.

Adjustment Screw