Gripping Force Tester GFT
®
-X 270
Rev. 1.8/1.5
12/2012
page 25
H.-D. SCHUNK GMBH & CO. SPANNTECHNIK KG Lothringer Straße 23 D-88512 Mengen
Tel. +49-(0)-7572-7614-0 Fax +49-(0)-7572-7614-99 www.schunk.de
If no data is displayed although the Handheld Unit is switched on and the
measurement menu is activated, proceed according chapter 13 Trouble shooting /
FAQ´s.
9
Calibration, Recalibration
The GFT
®
-X is carefully tested and calibrated on a test bench at the factory. A calibration
certificate is enclosed. This calibration certificate documents the traceability to national
standards, which realize the units of measurement according to the International System of
Units (SI).
The zero point of the Measuring Head could change due to stress (material fatigue) and due to
temperature variation. In a narrow range the measured value can be tared (set to zero) referring
7.6.2.1.
The GFT
®
-X is a calibrated measuring equipment, a recalibration should be performed by the
manufacturer after 12 months of operation. For calibration purpose we will ask you to send the
complete GFT
®
-X unit back to your supplier.
10
Maintenance, Service
The GFT
®
-X is a measuring device and should therefore be treated very carefully.
Special care must be taken with respect to the Measuring Head extension with its
crowned surface. Due to the gripping forces, this surface might be subject to wear
and tear in the course of time. A replacement is advisable at the latest when a ridge
becomes visible on the disk (spare part numbers see chapter 16)
If problems occur which cannot be solved as described in chapter 13, the complete GFT
®
-X
must be returned to the supplier. A detailed description of the problem will shorten the time to
repair and save costs.