FastFlo™ 620S Instruction Manual
Chapter 2 Installation
IM-62S
2-1
Chapter 2 Installation
Installation Overview
The FastFlo 620S flow meter is factory calibrated to the specific pipe size
shown on the meter’s Certificate of Calibration. The factory calibration
eliminates the task of calculating the average flow across the pipe to de-
termine the correct insertion depth. Simply insert the flow meter sensor
to the centerline position of the pipe. (If the pipe size differs from the me-
ter’s calibrated size, return the meter to the factory for re-calibration.)
When selecting an installation site, make sure that:
1. Line pressure and temperature will not exceed the flow meter rating.
Temperature should not vary more than 120°F (50°C) from the cali-
bration temperature. Line pressure should not vary more than 50
psi (3.4 bar) around the calibrated pressure.
2. The location meets the required minimum number of pipe diam-
eters upstream and downstream of the sensor head (see Figure
2-1).
3. Safe and convenient access with adequate clearance
.
Also, verify the
meter is located where the gas is clean and dry and the meter is cali-
brated for the gas to be measured.
4. For remote installations, verify the supplied cable length is sufficient to
connect the flow meter sensor to the remote electronics. (Do not ex-
tend or shorten the supplied cable between the probe and the elec-
tronics.)
Also, before installation check your flow system for anomalies such as:
•
leaks
•
valves or restrictions in the flow path that could create disturbances
in the flow profile that might cause unexpected flow rate indications
•
heaters that might cause rapid excursions in the measured temperature
