Honeywell EC350 - P-T-Z Measurement

5 Key features
5.2 P-T-Z Measurement
Honeywell 2024
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5.2 P-T-Z Measurement
5.2.1 Gas Pressure
Gas pressure is measured on a time-based approach (every 30 seconds), as opposed to being based on
volume input. With each 30 second measurement, the gas pressure correction factor is computed and
high and low Pressure alarms are checked (regardless of flow rate conditions).
The EC350 uses a high resolution analog to digital conversion process to produce a very accurate final
reading.
Up to two Pressure Transducer can be used with the EC350. The Pressure Transducer connected to the P1
input is used for computing the Gas pressure correction factor (item 044). If a second Pressure transducer
is connected at P2 input, this serves to monitor pressure but is not used for correction. Gas pressure
measurement can be disabled for either transducer by use of items 1052 (P1 Enable) or 1053 (P2
Enable).
The P4 is a virtual sensor connected to all pressure sensors. It calculates the pressure differences between
any two pressure sensors.
See Item Reference Guide” for information about the following pressure items and several other additional
pressure Items.
l
Gas Pressure (item 008)
l
Gas Pressure units (item 087)
l
Gas Pressure no. of decimal points (item 088)
l
Pressure correction factor (item 044)
l
Base Pressure (item 013)
l
Atmospheric Pressure (item 014)
l
Pressure Low alarm (item 143)
l
Pressure Low alarm limit (item 011)
l
Pressure High alarm (item 145)
l
Pressure High alarm limit (item 010)
5.2.1.1 Gas Pressure statistics
EC350 supports various pressure statistical items.
Following are several of the P1 pressure statistical items: