4. The linear regression equationwill be displayed.
Figure 109 – Excel Graph of Multipoint Calibration
5. The following is a guide to approximate expected good results.
a. The gradient (m) falls between 0.98 and 1.02.
b. The intercept (c) lies between -2 and +2.
c. The correlation (R
2
) is greater than 0.99.
6. If unsatisfactory results are observed refer to Section 7 Non Linear Response.
5.8 Flow Calibration (Internal Pump Option Only)
This procedure calibrates the rate of the flow generated by the internal pump.
The following procedure must be performed:
After a service or repair.
When the external flow check has found the flow to be outside normal range (±10%).
When a new pump has been installed.
Equipment Required
• Calibrated Flow Meter
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