Owner's manual

www.humboldtmfg.com
HUMBOLDT
Testing Equipment for
Construction Materials
Humboldt Mfg. Co.
875 Tollgate Road
Elgin, Illinois 60123 U.S.A.
U.S.A. Toll Free: 1.800.544.7220
Voice: 1.708.456.6300
Fax: [phone]
Email: [e-mail]
Fixing Instructions
1. Fix the Crack Monitor over the crack with the vertical zero line on the
calibration scale parallel with the crack to be monitored.
2. Ensure that the numbers on the scale are positioned correctly.
3. Use screws and adhesive to fix
3. Remove the two pre-set pegs
4. If the crack opens or closes the cursor moves relative to the calibration scale.
The opening or closing of the crack can then be recorded on the record sheet
on the reverse of these instructions.