caliper marks - humboldt mfg
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product manual11.10
HC-2943
Caliper Marks
Project
Location of Monitor
Indicate b
elow the m
ovement at each
reading
after the crack wid
ths have been
measured
using the D
igital or Vernier
Calip
er.
www.humboldtmfg.comHUMBOLDT
Testing Equipment for Construction Materials
Humboldt Mfg. Co.875 Tollgate RoadElgin, Illinois 60123 U.S.A.
U.S.A. Toll Free: 1.800.544.7220 Voice: 1.708.456.6300
Fax: 1.708.456.0137Email: hmc@humboldtmfg.com
Fixing Instructions1. Fix the Caliper Marks with adhesive about 80mm to 100mm apart on either
side of the crack to be monitored.2. The line of Caliper Marks should be perpendicular to the crack.3. Allow the adhesive to harden thoroughly before taking the first reading.4. The distance between the Caliper Marks is measured by locating the top
caliper jaw on the inside of each Caliper Mark.
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