Crystal MultiCal Pressure Module - Manual (Page 4)

Operation  2
MultiCal H2O/PSI Pressure Module Manual
Operation
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FUNCTIONS
To ensure safe and accurate operation, please be familiar with the following operations and functions.
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WARNING: Severe injury or damage can occur through improper use of pressure instruments! Do not exceed recommended pressure limits of
tubing and fittings. Be certain all pressure connections are secured. Never disconnect pressure instrumentation without first relieving
system pressure.
!
CAUTION: Never insert any object (other than a 1⁄8" NPT fitting) into the inlet ports. The sensor diaphragm is very thin and can be damaged or
destroyed by solid or sharp objects. Clean the sensor with appropriate solvents, only.
The internal pressure sensor measures the difference between atmospheric (barometric) pressure, and the pressure (or vacuum) applied to the pressure port.
The pressure being measured can be either liquid or gaseous, providing it is compatible with the materials listed in the specification section.
PTFE tape should be used with any fittings installed into either of the 1⁄8" female NPT ports. Two ports are provided so that additional tees should not be
required. Plug any unused ports.
MultiCals have been calibrated for use with meters that have 10MΩ input impedance, as do most handheld meters, and some benchtop multimeters. If your
meter has higher or lower input impedance, add 0.1% to the specification of the MultiCal, or refer to the Calibration section of this manual for other methods
of eliminating the error introduced by an impedance mismatch.