Humboldt HC-2939 User Manual

11.10

product manual

HC-2939

Displacement Crack Monitor

Location of Monitor

Project

Taking Readings:

Slide the ruler into the slot in the top plate until it fits

into the raised panel on the bottom plate.

Displacement Monitoring: Where the red scal on the

ruler projects from the top plate take a reading and

mark the results below.

Horizontal Monitoring: Where the red line at the cen-

ter of the ruler coincides with the black scale on the top

plate, take a reading off the black scale and mark the

results below.

Displacement Crack Monitors measure displacement (out of plane) and
horizontal movement across a crack.

The Displacement Crack Monitor consists of three components: a graduated
ruler, a top plate (calibrated) and a bottom plate (not calibrated). It is only the
top and bottom plate that are fixed across a crack. The ruler is not left on the
gauge, but is only used when taking readings.

Fixing Instructions

1. Align the bottom plate parallel to the crack and fix with screws and rawlplugs
(size 6) and adhesive (figue 1).

2. Align the top plate on the other side of the crack at 90° to the bottom plate
and fix with screws and rawlplugs (size 6) and adhesive (figure 2).

Humboldt Mfg. Co.

875 Tollgate Road
Elgin, Illinois 60123 U.S.A.

Testing Equipment for

HUMBOLDT

www.humboldtmfg.com

U.S.A. Toll Free: 1.800.544.7220

Voice: 1.708.456.6300

Fax: [phone]

Email: [e-mail]

Construction Materials