Sourcing Pressure - Fluke 744 User Manual

744
Users Manual

Sourcing Pressure

The calibrator provides a source pressure display
function that requires the use of an external pressure
hand pump. Use this function to calibrate instruments
that require a pressure source or differential pressure
measurement. See Figures 19 and 34 for information
about that application.
Many ranges and types of pressure modules are
available from Fluke. See "Accessories" near the
back of this manual. Before you use a pressure
module, read its Instruction Sheet. The modules vary
in how you use them, how you zero them, what types
of process pressure media are allowed, and
accuracy specification.
To use the source pressure display, see Figure 19
and proceed as follows:
wWarning
To avoid a violent release of pressure in
a pressurized system, shut off the valve
and slowly bleed off the pressure before
you attach the pressure module to the
pressure line.
52
Caution
To avoid mechanically damaging the
pressure module, never apply more than
10 ft.-lb. of torque between the pressure
module fittings or between the fittings
and the body of the module. Always
apply appropriate torque between the
pressure module fitting and connecting
fittings or adapters.
To avoid damaging the pressure module
from overpressure, never apply pressure
above the rated maximum printed on the
pressure module.
To avoid damaging the pressure module
from corrosion, use it only with specified
materials. Refer to the printing on the
pressure module or the pressure module
instruction sheet for the acceptable
material compatibility.