Nova-Tech LMI Series AA-B-C-E-J-P Metering Pumps - Manual (Page 32)

32
CAUTION
!
8.2 Calibration Procedure - On-Site
Volumetric Calibration in External Mode
1. Since pump output is governed by an external device such
as Flowmeter-Pulser, Liquitron ™ Controller, or 4-20 mA
DC signal from an instrument with an LMI Analog-to-
Digital Converter, only the output per stroke may be
calibrated.
2. With pump primed and discharge tubing connected to the
injection point as it would be in normal service, place Foot
Valve Assembly in a graduated container with a volume of
1000 ml or more.
3. Switch pump to Internal mode with Speed Knob set at 100
until air is exhausted from suction line and pump head.
4. Adjust Pressure Control (if desired) - See Section 8.1.
5. Switch pump OFF and note solution level in graduated
container. Refill graduate to a starting point.
6. Switch pump ON and count the number of strokes for
exactly one minute, then switch pump OFF.
7. Note volume pumped during the calibration period of one
minute. Divide into this the number of strokes to determine
the volume of solution pumped per stroke.
Example: 500 ml in 100 strokes = 5.0 ml per stroke.
Multiply this by your expected stroke rate per minute, per hour
or per day and compare with desired output requirements.
8. Adjust Stroke Length Knob (lower knob) to your best estimate
of required correction and repeat calibration procedure.
9.0 Spare Parts Replacement
Routine Maintenance
9.1
Depressurizing the Discharge Line
(For Pumps Equipped with a 3-FV or a 4-FV only)

ALWAYS wear protective clothing, face shield, safety glasses
and gloves when performing any maintenance or replacement
on your pump.