Nova-Tech LMI Series HH Metering Pump - Manual (Page 14)

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7.3 Stroke Adjustment:
The Stroke Adjustment dial controls the volume of chemical being
injected with each stroke. The 100% setting indicates the maximum
volume per stroke.
The maximum rated output of your pump is
indicated on the data plate. The HH output
control features have been designed to make it
easy for the user to determine the appropriate
speed and stroke settings.
7.4 Calibration
The HH has been designed to inject a precise, repeatable amount of
chemical against system pressure. Because every system is different,
it is necessary to calibrate the pump once it is installed. The
calibration will enable you to fine tune the HH to provide the desired
injection amount.
The HH calibration is done after the pump is fully primed. The
discharge or injection point must be at normal operating pressure
for an accurate calibration to be done.
The suction line should be valved to run off the in-line calibration
cylinder. This cylinder must reproduce the suction pressure applied
by the tank (see Figure 4).