Checkline DTMB User Manual

Page 12

5.42 Inserting Sample Into Thickness Compensator

Push the Thumbpiece forward to separate the two
anvils. Insert the sample into the slot and slowly
release the Thumbpiece back to its resting position.
The material sample should be secured between
the two anvils. Place the ends of the sample under
the Sample Holding Clips located on each side of
the unit. If the ends stick up bend them back so they will not present a safety
hazard.

NOTE: In lieu of a sample, an equivalent shim can be inserted into the
Thickness Compensator as long as its compressed thickness is the same as the
process material. The shim should be secured using a spray adhesive on one
side, so it will not fall out each time the Thumbpiece is pushed forward.

5.50 Gravity Correction Procedure (ZERO)

The DTMB is factory calibrated for use in
the right-handed, horizontal position

(vertical material path) with the rollers

aligned vertically. When using the DTMB

in any other orientation, a Gravity

Correction Procedure (Zero) should be
performed.

Hold the instrument in the measuring
position and press the and
keys simultaneously. The display will show zero.

The DTMB is now ready for use.

POWER

EXIT

RECALL

Sample Holding Clip

5.40 Thickness Compensator

When using the "three-roller” principle of tension measurement, an increase in
material diameter will result in an increased tension reading even when the line
tensions are unchanged. The DTMB is supplied with a proprietary Thickness
Compensation system which automatically shifts the outer rollers to compensate
for this effect. Additionally, the Thickness Compensator measures the material
diameter with an accuracy of 0.01 mm (0.0004 ") for use as a factor in the com-
puter calibration formula.

The Thickness Compensator is located on the back of the instrument. When the
Thumbpiece is pushed forward, two metal plates (anvils) will separate creating a
slot for insertion of the material sample.

NOTES:

1. Some monofilaments, wires and other difficult-

to-bend samples will need special preparation
prior to insertion into the Thickness
Compensator. See Preparing Sample for
Thickness Compensator.

2. It is unnecessary to use the Thickness

Compensator on the DTMB-200 because the
range of material diameters used with this
model is inconsequential.

5.41 Preparing Sample For Thickness Compensator

When using monofilament, wire or other difficult-
to-bend materials, the sample must be prepared
properly before inserting into the Thickness
Compensator. Using the pliers supplied, bend the
sample as noted in the sketch. For monofilaments,
maintain arc “A” as shown, so sample bends into
anvils.

Thickness Compensator

anvils

1-1/4"

1-1/2"

arc A