Technology Solutions
Instruction Manual
Tek-Cor 1100A
www.tek-trol.com
32
5.2.9
Zero Calibration
5.3
Calibration
The Tek-Cor 1100A Coriolis Mass Flow meter does not need field calibration because it
is calibrated before delivery. Each Tek-Cor 1100A has its own instrumental coefficient,
including one flow coefficient and four density coefficients, which are high density D1,
high period K1, low density D2, and low period K2. These are present on the sensor.
The direct mount instrument comes preset with the instrument coefficients and the
user cannot change this.
5.3.1
Zero Calibration
Zero calibration provides the reference point for the flow meter. It is necessary to
conduct zero calibration whenever the Coriolis Mass Flow meter installation is
performed.
For zero calibration, perform the following steps after installation-
1.
Warm-up the flow meter for 30 minutes.
2.
After the warm-up time is complete, continue the flow through the flow meter
till the temperature of the flow meter is same as the working temperature of
the fluid.
3.
After the flow meter has reached the required temperature, close the
downstream valve and make the fluid pass through the flow meter under
normal temperature, density, and pressure and then close the upstream valve
to ensure that the sensor is full of liquid during the process of zero calibration.
4.
Do the zero calibration of the flow meter.
NOTE
Each zero calibration takes 30 seconds and must repeated at least 10 times.
5.3.2
Flow Calibration
The mass measured by Tek-Cor 1100A is calculated from the multiplication of the
detected signals’ time difference between two circuits and flow calibration factor. If
the accuracy is not up to grade after long-term service, modify the flow calibration
factor according to the following formula:
𝐊𝐊
𝟏𝟏
=
𝐊𝐊
𝟎𝟎
× (
𝟏𝟏
+
(
𝐌𝐌−𝐌𝐌
𝐭𝐭
)
𝐌𝐌
𝐭𝐭
)
𝐊𝐊
𝟏𝟏
=
𝐊𝐊
𝟎𝟎
×
𝐌𝐌
𝐌𝐌
𝐭𝐭
where,
