VELTRON DPT 2500
Air Monitor Corporation
116-045-10.P65 (6/99)
VELTRON DPT 2500
- IO&M Manual
5
SECTION 3 – INSTALLATION
3.4 – PROCESS CONNECTIONS
The VELTRON DPT 2500 comes standard with brass ¼” tube compression fittings (or special fittings if ordered). To these fittings
connect the appropriate rigid or flexible tubing. Although any size tubing can be used, the response time of the VELTRON DPT 2500
to process change can increase if there is an increase in tubing size or an increase in tube length. The following table lists
recommended tube size versus length.
When connecting the VELTRON DPT 2500 to an airflow measuring device, connections must be completed as follows:
– High port on the DPT 2500 connects to Total Pressure from the airflow measuring device.
– Low port on the DPT 2500 connects to Static Pressure from the airflow measuring device.
When connecting the VELTRON DPT 2500 for positive room pressurization, connections must be completed as follows:
– High port on the DPT 2500 connects to sensor from monitored room.
– Low port on the DPT 2500 connects to reference sensor.
When connecting the VELTRON DPT 2500 for negative room pressurization, connections must be completed as follows:
– High port on the DPT 2500 connects to reference sensor.
– Low port on the DPT 2500 connects to sensor from monitored room.
CAUTION
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 DPT 2500.
When making any tubing connections or changing fittings, use a 9/16” wrench to prevent the
1/8” FPT bulkhead fitting from turning.
Signal Line Length
Recommended Tube Size
Up to 50'
1/4"
50' to 200'
3/8"
Over 200'
1/2"
