6
PROCEDURE FOR ON-SITE VOLUMETRIC CALIBRATION E7 IN INTERNAL MODE
A.
Make certain speed control knob is turned fully clockwise. Turn off power to pump.
B.
With pump primed and discharge tubing connected to the injection point as it would be in normal
service, place foot valve and strainer assembly in a graduated container with a volume of 500 ml or
more (so that the volume displaced by tubing and foot valve assembly is minimal in relation to
volume of the solution in the container).
C.
Turn pump on, and pump until air is exhausted from the suction line and pump head.
D.
Turn pump off, note the solution level in the graduate. Refill graduate if necessary.
F.
Turn off pump at the end of the calibration period, note volume pumped during the calibration
period, and calculate volume of solution pumped in the time unit you choose (minute, hour, day,
etc.).
G.
Adjust stroke frequency and/or stroke length knobs to your best estimate of required correction, and
repeat calibration measurements as a check.
PROCEDURE FOR ON-SITE VOLUMETRIC CALIBRATION OF E7 IN EXTERNAL MODE
A.
Since pump output is governed by an external device, only the output per stroke may be calibrated.
B.
With pump primed and discharge tubing connected to the injection point as it would be in normal
service, turn off pump and place foot valve and strainer assembly in a graduated container with a
volume of 500 ml or more.
C.
Turn pump to internal mode with speed knob set at 100 and operate until air is exhausted from
suction line and pump head.
D.
Turn pump off and note solution level in graduated container. Refill graduate if necessary.
E.
Turn pump on and count the number of strokes for exactly one minute. Then switch pump off.
F.
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: 50 ml/100 spm = 0.5 ml per stroke.
Multiply this by your expected stroke rate per minute, per hour or per day and compare with
desired output requirements
.
G.
Adjust stroke length knob (lower knob) to your best estimate of required correction and repeat
calibration procedure.
You may elect, for safety and convenience, to do the first calibration or operating test with water or other
non-hazardous solution. If so, make certain the water or test fluid is removed from the Liquid End before
pumping solutions that may react with the test fluid or be exothermic, such as sulfuric acid.
The final calibration adjustment should be made with pumping conditions identical to conditions of normal
pumping service. This means that factors such as injection pressure, fluid viscosity, suction lift and others
will automatically be accounted for in making the final adjustment of the pump.
Max. Pressure Rating
Max. Output
Series
psi
Bar
GPH
l/h
E70
300
20.7
1.3
4.9
E71
150
10.3
2.5
9.5
E72
100
6.9
4.0
15.1
E73
60
4.1
8.0
30
E74
25
1.7
20.0
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