VELTRON II
Air Monitor Corporation
116-011-98.P65 (8/30/10)
VELTRON II - IO&M Manual
7
4.4 – PROCESS CONNECTIONS
The VELTRON II comes standard with brass 1/8" FPT connections (or special fittings if ordered). To these connections
the customer can install fittings required for the type of tube/pipe used to connect to process sensor (i.e. flow station,
flow probe, static pressure sensors).
When connecting the VELTRON II to an airflow measuring device, connections must be completed as follows:
– High Port on VELTRON II connects to Total Pressure from airflow measuring device.
– Low Port on VELTRON II connects to Static Pressure from airflow measuring devices.
When connecting VELTRON II for positive room pressurization, connections must be completed as follows:
– High Port on VELTRON II connects to sensor from monitored room.
– Low Port on VELTRON II connects to reference sensor.
When connecting VELTRON II for negative room pressurization, connections must be completed as follows:
– High Port on VELTRON II connects to reference sensor.
– Low Port on VELTRON II connects to sensor from monitored room.
Although any size of tube/pipe can be used, the response time of the VELTRON II to process change increases with
increasing tube/pipe size or increasing in tube/pipe length.
CAUTION
– Selected fittings should be compatible with the brass 1/8" FPT bulkhead connection, and installed using an
appropriate thread lubricant/sealant.
– When signal fittings are added or removed, use a 9/16 wrench to prevent the 1/8" FPT bulkhead fitting from
turning.
– It is extremely important that no pressure be present in signal tubing at the time of installation, and the
orientation of high and low pressure signal lines is maintained between the source and the VELTRON II.
If process being measured contains humidity or moisture, it is recommended a drip leg with drain on each tube/pipe be
installed to preclude the migration of water into the VELTRON II. See Figure 4.2. for typical drip leg installation.
Figure 4.2
SECTION 4 – INSTALLATION
CAUTION
Migration of water into
the VELTRON II will
void warranty.
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