WIKA CPH6400 - Handbuch (Seite 7)

7 WIKA operating instructions, model CPH6400
11313439.04 12/2012 GB/D
GB
2. Safety
2.3 Special hazards
WARNING!
■ Pressure sensors should only be fitted or removed when the system
is free from pressure.
■ Observe the working conditions in accordance with chapter
"3. Specifications".
■ Always operate the pressure indicator within its overload limits.
■ Residual media in dismounted precision hand-held pressure indica-
tors and/or their sensors, can result in a risk to persons, the environ-
ment and the equipment.
Take sufficient precautionary measures.
■ Do not use this precision hand-held pressure indicator in safety or
Emergency Stop devices. Incorrect use of the precision hand-held
pressure indicator can result in injury.
■ Should a failure occur, aggressive media with extremely high temper-
ature and under high pressure or vacuum may be present at the
precision hand-held pressure indicator and the sensors.
■ Plan the wiring especially carefully when connecting to other devices.
Under certain circumstances, internal connections in third-party
devices (e.g. GND connected to the ground) can lead to impermis-
sible voltages that could compromise or even destroy the function of
the device itself or a device connected to it.
■ To ensure problem-free operation, only operate the precision hand-
held pressure indicator on battery power. Only use the mains lead for
charging the batteries of the precision hand-held pressure indicator.
■ Only use the sensor cable available from WIKA for the precision
hand-held pressure indicator. Do not connect any cable over 3 m
long to the CPH6400.
■ The measurement signal of the reference (or test sample) can be
influenced by large electromagnetic effects and the display of the
signal may be lost completely.
■ The display screen is made from glass. If there is any possibility of
the screen breaking during operation, all personnel in the vicinity of
the instrument must wear eye protection before and during its use.
■ If the CPT6400 reference pressure sensor is used in applications
with oil as a pressure medium, make sure it is not be used with
flammable material or gases directly afterwards, since this can lead
to dangerous explosions and a risk to personnel and machinery.