Page 963 - techequipmentscatalogue2016
P. 963
FL.UKE ®
To perform the test: • Always center the vernier
of your hand pump before
To get started, isolate the flow computer from the pipeline. It is normally in- starting any pressure
stalled with a 5 valve manifold. If so, closing the valves on the pipeline side calibration. This will allow
of the manifold should isolate it. Be sure to follow local policy and safety you to increase or decrease
procedures when performing this isolation step. Set the PI sensor of the the pressure when making
721 to measure inH20 and the P2 sensor to measure PSI and the tempera- fine adjustments.
ture sensor to measure degrees Celsius or Fahrenheit as needed.
• Store the temperature
Low pressure differential pressure calibration is performed using probe in a protective
case such as the built in
1 atmospheric pressure as a low side reference. Vent the low connection slot of the 721 soft case.
Exposing the RTD probe
of the flow computer or pressure transmitter and connect the high pressure to mechanical stress can
connection of the flow computer or transmitter to the low pressure port (PI) reduce the measurement
on the calibrator. accuracy of the probe.
Connect the computer (PC) to the flow computer serial or USB port. The PC • Be careful to not connect
will instruct the user to apply one or more test pressures to the flow com- the PI low pressure
puter or transmitter. For example, 0, 100 and 200 inH20. Squeeze the pump side of the calibrator
to get close to the test pressure and use the vernier or fine pressure adjust when doing high
to dial in. pressure calibrations
or measurement or the
Static pressure calibration will normally be applied to either the same sensor will be damaged
high pressure port of the flow computer or both the high and low pressure and possibly rupture
ports. Refer to the manufacturer's instructions for details. Connect the high creating a dangerous
pressure sensor input (P2) to the appropriate port on the flow computer or condition.
transmitter and to the high pressure test source. The PC will instruct the
pressures for the user to apply from the pressure source. • Inserting the RID probe
prior to the pressure
Temperature calibration of the temperature measurement on the flow calibrations typically
allows sufficient time to
3 computer is done with a single temperature point at the pipeline operating reach a stable temperature
measurement.
temperature. Insert the RTD probe into the test thermowell and allow time
for the measurement to stabilize. Additional resources
The PC will prompt the user to enter the temperature measured by the For more in depth information
calibrator. Remove the RTD from the test thermowell and the calibration is about this application check out
complete. these videos and application notes
from Fluke.
Flow Computers with 4 to 20 mA inputs: Many flow computers utilize a
HART pressure and HART
4 low pressure, static and temperature transmitter to convert the measured smart RTD transmitter
754 videos
parameters into 4 to 20 mA signals. In this instance these transmitters may
need individual calibration if the test results are not satisfactory (see HART f-!l Cust?dy?ransfer calibration
Transmitter Calibration application note or video for more details). Anoth- l!.=J apphcatlOn note
er source for errors in this configuration is the input A/D cards of the flow
computer. These can be independently tested using a rnA signal source HART transmitter calibration
from a loop calibrator.
www.tech-equipments.comlsales@tech-equipments.com 957
To perform the test: • Always center the vernier
of your hand pump before
To get started, isolate the flow computer from the pipeline. It is normally in- starting any pressure
stalled with a 5 valve manifold. If so, closing the valves on the pipeline side calibration. This will allow
of the manifold should isolate it. Be sure to follow local policy and safety you to increase or decrease
procedures when performing this isolation step. Set the PI sensor of the the pressure when making
721 to measure inH20 and the P2 sensor to measure PSI and the tempera- fine adjustments.
ture sensor to measure degrees Celsius or Fahrenheit as needed.
• Store the temperature
Low pressure differential pressure calibration is performed using probe in a protective
case such as the built in
1 atmospheric pressure as a low side reference. Vent the low connection slot of the 721 soft case.
Exposing the RTD probe
of the flow computer or pressure transmitter and connect the high pressure to mechanical stress can
connection of the flow computer or transmitter to the low pressure port (PI) reduce the measurement
on the calibrator. accuracy of the probe.
Connect the computer (PC) to the flow computer serial or USB port. The PC • Be careful to not connect
will instruct the user to apply one or more test pressures to the flow com- the PI low pressure
puter or transmitter. For example, 0, 100 and 200 inH20. Squeeze the pump side of the calibrator
to get close to the test pressure and use the vernier or fine pressure adjust when doing high
to dial in. pressure calibrations
or measurement or the
Static pressure calibration will normally be applied to either the same sensor will be damaged
high pressure port of the flow computer or both the high and low pressure and possibly rupture
ports. Refer to the manufacturer's instructions for details. Connect the high creating a dangerous
pressure sensor input (P2) to the appropriate port on the flow computer or condition.
transmitter and to the high pressure test source. The PC will instruct the
pressures for the user to apply from the pressure source. • Inserting the RID probe
prior to the pressure
Temperature calibration of the temperature measurement on the flow calibrations typically
allows sufficient time to
3 computer is done with a single temperature point at the pipeline operating reach a stable temperature
measurement.
temperature. Insert the RTD probe into the test thermowell and allow time
for the measurement to stabilize. Additional resources
The PC will prompt the user to enter the temperature measured by the For more in depth information
calibrator. Remove the RTD from the test thermowell and the calibration is about this application check out
complete. these videos and application notes
from Fluke.
Flow Computers with 4 to 20 mA inputs: Many flow computers utilize a
HART pressure and HART
4 low pressure, static and temperature transmitter to convert the measured smart RTD transmitter
754 videos
parameters into 4 to 20 mA signals. In this instance these transmitters may
need individual calibration if the test results are not satisfactory (see HART f-!l Cust?dy?ransfer calibration
Transmitter Calibration application note or video for more details). Anoth- l!.=J apphcatlOn note
er source for errors in this configuration is the input A/D cards of the flow
computer. These can be independently tested using a rnA signal source HART transmitter calibration
from a loop calibrator.
www.tech-equipments.comlsales@tech-equipments.com 957
