Brooks Instrument 5861E - Manual (Page 16)

3-2
Model 5861E
Section 3 Operation Installation and Operation Manual
X-TMF-5861E-MFM-eng
Part Number: 541B107AAG
November, 2008
3-2 Operating Procedure
a. Apply power to the flowmeter and allow approximately 45 minutes
for the instrument to warm-up and stabilize its temperature.
b. Turn on the gas supply.
c. Shut-off flow to the meter and observe the flowmeter's output
signal. If the output is not 0mVdc (±10mVdc), check for leaks and
if none are found, refer to the re-zeroing procedure in Section 3-3.
d. Open valve to allow flow to pass through the meter.Monitor the flow
output signal.
3-3 Zero Adjustment
Each Model 5861E is factory adjusted to provide a 0 ±10mVdc signal at
zero flow. After initial installation and warm-up in the gas system the zero
flow indication may be other than the factory setting. This is primarily
caused by changes in temperature between our calibration laboratory and
the final installation. The zero flow reading can also be affected to a small
degree by changes in line pressure and mounting attitude.
Figure 3-1 Flow Sensor Operational Diagram