Nova-Tech LMI Series HH Metering Pump - Manual (Page 23)

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11.2 Speed
The speed may be changed with the pump ON or OFF. To increase
or decrease the speed, press or hold the (Up) or (Down)
key. The range runs from 0 SPH to 100 SPM. While normally the
speed will be set in SPM, if settings of SPH are desired, hold the
(Down) key until the display reads 0, then continue to hold it for an
additional three (3) seconds. The display will then show H60, which
is 60 SPH. The speed can be further reduced to 0 SPH with the
(Down) key.
For example:
MIN
INT +3 sec INT
MIN
INT