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Advanced Operation and Configuration
Pressure Modules and their Naming Conventions
MC5P’s software refer to pressure modules as follows:
Port: Module Name, e.g. P1: INT400m
which means that there is an internal pressure module in port P1
with a 0 to 400 mbar (0 to 6 psi) pressure range.
The names of internal pressure modules start with the letters INT.
The names also include numbers and possible additional letters as
follows:
1. The number defines the max. nominal pressure in the SI pres-
sure unit bar.
2. If the number is followed by a small “m”, the given max. nomi-
nal pressure is given in mbar.
3. If there is an additional letter C, the pressure module is a com-
pound module with an ability to also measure negative gauge
pressures.
Examples: Name Max. nominal pressure in psi
INT100m 100 mbar 1.5
INT400mC ± 400 mbar ± 6
INT2C -1 … 2 bar -14.5 … 30
Notes.
Compound modules with a max. nominal pressure above 1 bar (e.g.
INT2C) are able to measure negative pressures down to -1 bar.
Compound modules with a max. nominal pressure below 1 bar (e.g.
INT400mC) are only able to measure as deep negative pressures
as positive pressures.
The name of the internal barometric pressure module is B.
Eternal pressure modules have a name that starts with the letters
EXT. The name includes numbers and possibly an additional letter
similar to internal modules (does not apply to old XPMs).
Square Rooting
Pressure transmitters or converters used for flow measurement of-
ten have square rooting character. To enable correct percentage
error calculation of square rooting transmitters, select “square root-
ing” as the Transfer Function.
Square rooting is required when entering instrument data for a pres-
sure instrument (see Part D, Calibration). Standard pressure mea-
surement in Basic Mode does not require any Transfer Function
information.
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