How To Mechanically Calibrate The Sb-100 Meter (M-Cal Option) - Bennett 3700 Series Installation Manual

How to Mechanically Calibrate the SB-100 Meter
The Bennett SB-100 Meter is built to maintain accurate measurement under normal operating
conditions. The meter is a positive displacement device with rods and pistons, which require a break in
period. The meter is calibrated at the factory using a solvent for safety purposes, and must be
calibrated after it has been installed. We strongly suggest recalibration of the meter after a 90 day break
in period.
With the 3800 series electronic dispenser, mechanical calibration is optional. The standard 3700 is
calibrated electronically. This means that the meter in the dispenser may not be able to be calibrated
mechanically (it will not have a mechanical calibration wheel). If the meter on the dispenser does not
have the mechanical calibration wheel on it then use the electronic calibration option. Go to the next
section in this manual that explains how to perform an electronic calibration.
The dial adjusting cover has (+) and (-) arrows to
indicate the correct direction to rotate the dial to
either increase or decrease delivery.
The dial cover has two pin hubs, one to the left of
the shaft and one to the right. The seal pin may be
inserted in either hub (see figure 43). The smallest
adjustment (.6 cu. in.) occurs when the pin is pulled
from one side and inserted in the other side by
moving the dial the least amount or half a hole. A
1.2 cu. in. adjustment is made by pulling the pin
and turning the dial until the next adjacent hole
aligns with the same hub and reinserting the pin.
To calibrate the meter, follow this procedure:
1. Measure the actual delivery of the meter at fast
flow in an accurate test measure. Dispense a
minimum of 5 gallons (20 liters).
2. Cut and remove the existing seal wires and
remove the seal pin (see figure 42).
3. Turn the dial the necessary amount in the (+)
or (-) direction to increase or decrease the
quantity of fuel delivered.
4. Re-insert the seal pin in the desired pin hub.
5. Dispense 5 gallons (20 liters) of fuel to allow
the meter to adjust to the new settings. Do not
make any adjustments based on this delivery.
6. Make sure the meter is properly calibrated.
Dispense another 5 gallons (20 liters) of fuel
into an official test measure to check the
calibration.
(M-Cal Option)
Figure 43 - Calibration Wheel
1. A fast flow test at 11 GPM shows a +3 cu. in.
reading in a five gallon test measure.
2. Remove the existing seal and pin and turn the
dial clockwise (-)five minimum adjustments (half
holes) and reinsert the pin.
3 cu. in.
.6 cu. in./adjustment
3. Test and reseal.
1. A fast flow test at 11 GPM shows a -2 cu. in.
reading in a five gallon test measure.
2. Remove the existing seal and pin and turn the
dial counterclockwise
adjustments (half holes) and reinsert the pin.
2 cu. in.
.6 cu. in./adjustment
3. Test and reseal
54
Example 1
= 5 half holes (-)CW
Example 2
(+) three minimum
= 3 half holes (+) CCW
120001 Rev K 1-19-18