
BA_008 Rev 1F6 Pressure gauges Page 4/4
4.1 Zero-point correction
Small measuring errors or deviations
caused by difference in level between pres-
sure gauge and point of measurement can
be corrected on measuring devices with
micro control position pointers. To do so
turn the adjusting screw on the pointer hub
(see picture ).
Similarly, a displacement of the zero point
caused by use and long service life can be
corrected if necessary.
Picture 4: Zero-point correction
4.2 Devices with Diaphragm Seal
Remove the protective cap or protective wrapping from the diaphragm only just before installation
to prevent contamination or damage.
The diaphragm must not be touched. Do not place the device on its diaphragm. Even small
scratches or deformations may negatively influence the zero point or other characteristics of the
device.
Pressure transmitter and diaphragm seal are a closed system that must not be separated.
You can find further information about diaphragm seals in the document TA_031 on
www.labom.com
.
4.3 Maintenance / Service
When properly installed in accordance with applicable specifications, this device is maintenance-
free. However, we recommend an annual recalibration of the device.
In the event of any damage or defect the customer cannot replace or repair any components or
assemblies.
5 Disassembly
When measuring hot media, make sure that the device has cooled down prior to any dismounting
or wear appropriate protective clothing to avoid burns.
Warning
Opening pressurized lines might cause severe injuries.
Danger of severe injuries or damage
Relieve the process pressure before attempting
to remove the device. Shut off
the pressure supply for all feed lines to the device and relieve the pressure in
them.
Warning
Hazardous deposits and residues might remain on opened process connec
removed devices.
Danger of injury
After the device has been removed, seal off the measuring point and mark the
open process connection accordingly. Consider a possible danger due to resi-
dues when handling the removed device.