TSI Incorporated Certifier FA Plus - Required Pre-Test Calibrations; High Flow Module; Low Flow Module; Low-Pressure and High-Pressure Transducer Zeroing

2: Setup and Operation 35
Caution
 To ensure accurate measurements, wait one minute for the Certifier
®
FA Test
System to warm up. If environmental conditions have changed significantly, more
time may be necessary.
 To avoid damage to the Certifier
®
FA Test System components, always use
bacteria filters upstream of the flow modules, and always cap flow module ports
when not in use.
 If liquid has penetrated any of its components, do not use, and return to the factory
for calibration.
2.4 Required Pre-test Calibrations
2.4.1 Low Flow Module
2.4.1.1 None required
2.4.2 High Flow Module
2.4.2.1 Zeroing the Flow Direction Sensor
The model 4081, High Flow Module, has a sensor that is used to detect the direction of
flow. This sensor will normally auto-zero if there is no flow for a fraction of a second. If it
is unable to do this at power-up or at least every 10 minutes, a appears on the
screen. Touch the symbol on the display for an explanation of the warning. To manually
zero the direction sensor, remove the High Flow Module from the flow source and cover
one end of the flow tube for a couple of seconds.
2.4.2.2 Low-Pressure and High-Pressure Transducer Zeroing
Check the Low-pressure transducer zero and a High pressure transducer zero by
disconnecting the pressure tubing from the flow module before each pressure
measurement after initial power up to ensure the most accurate readings. If the low or
high pressure is not reading zero, perform the following steps to zero the transducers.
1. Disconnect the pressure tubing from the low and high pressure ports.
2. Press the key.
3. “Pressure Transducers Zeroing” appears on the display for one second. If the
transducers do not see a steady pressure or near zero pressure, an error appears.
NOTE: The barometric pressure transducer does not require a zero calibration.