Slayer Steam LP - Flow Meter Calibration

SLAYER STEAM LP USER MANUAL V1.1 | JUNE 2019 37
FLOW METER CALIBRATION
The flow meter calibration is designed to ensure that volumetrics set
points are consistent group to group. A modification to this parameter
applies an oset to the entire group, not just a particular shot. Use this
method if both shots on a group are not accurate. See the section on
Calibrate Shot Weight Osets on pg 32 for shot to shot adjustments
on a particular group. While factory set manufacturer tolerances are
minimal between flow meters, Slayer has applied the following calibration
exercise to sync up subtle performance dierences, to ensure consistent
performance group to group.
1. The first objective is to reset the flow meter oset to 0 g. To do
this, scroll to the Advanced or Manager menu prompt and enter
the password if required. Scroll to Cal Shot Wt Oset and press the
button to select.
2. Scoll throught the values until the maximum value for Measured Wt is
reached. (When <0.0>g is reached, click in the opposite direction for
the maximum oset). Press the menu button to select and save.
3. Copy this oset to all groups when prompted.
4. Remove dispersion screw and shower screen from the groups. See Fig.
1 on pg. 41.
5. Using the Brew Parameters menu, program a desired shot weight (ex:
Pre: 0s | Brew 50.0g | Post 0g) to position 1. Copy to All groups.
6. Using a scale to measure shot weight, dispense and record the
weights of several shots of water and take a reasonable average of
the results. Subtract this number from the expected shot weight
displayed on the screen and multiply by (4) four. This is the oset
value.
7. Press the menu button and enter the password, if enabled, to access
the Advanced Menu.
8. Scroll to Flow Meter Calib. and press enter to select.
9. If the Expected Shot Weight is greater than the Measured Average
Weight of the test, scroll to enter the oset value in pulses as a
negative number.
SCREEN EXAMPLE:
Flowmeter Calib.
Gp1: <-10> puls
If the Expected Shot Weight is less than the Measured Average
Weight of the test, scroll to enter the oset value in pulses as a
positive number.
Ex:
Average of Shots = 47.5 g;
Expected Shot Wt as shown on the dsiplay = 50.0 g
Dierence = 2.5 g x 4 = 10
AND
Measured Wt < Expected Shot Wt, so enter -10 oset value
10. Press and hold the button to return to the home menu.
11. Verify that the new calibration is accurate: by runnig the programmed
shot again and comparing it to the actual weight.
12. Repeat steps 6 through 11 for the additional groups.
Now that flow meters have been calibrated group to group, indiviual shots
can be further fine-tuned using the Calibrate Shot Weight Oset option.
See pg. 32.