Calculating Brew Ratio
(example: 18 grams dry coffee : 36 grams beverage weight or 1 : 2
Brewing in BREWRATIO mode
In Brew-ratio mode, the machine will calculate your target beverage mass by
applying your programmed brew ratio to your measured input dose.
First Enter Portafilter Weight
• Hold G1B2 for 2 seconds until is displayed.
• Wait until is displayed, place portafilter on scale tray, making sure
the lip of the portafilter sits in the crescent shaped cutout.
• This only need to be done once, and applies to all groups.
Enter Desired Target Brew Ratio in Programming
• Load portafilter to desired dose.
• Hold B1 on desired group for two seconds, until is displayed.
• Once the weight of the portafilter is displayed (as a negative value )
place loaded portafilter on scale tray, making sure the lip of the
portafiler sits in the crescent shaped cutout. The keypad will flash once
the dose is recorded.
• Engage the portafilter in the group.
• Start shot using programmed button.
• The target weight will be calculated based on the programmed brew-
ratio and displayed until the tare time.
• The shot will self-terminate when calculated beverage mass is reached.
Checking/Calibrating Scales
Your scales (firmware v1.8) come calibrated from the factory, and do
not need to be calibrated on install. Should you ever need to recalibrate,
follow these instructions:
To Check Calibration:
• Enter mass mode.
• With blind disk in portafilter, engage continuous brewing.
• After [ ] [ ] [ ] stops blinking ~5 seconds 0.0 will be displayed.
• When 0.0 is displayed, place 100.0g weight on scale.
• Display should show 100.0 +/- .1g.
• If scale is outside of range, calibration must be performed.
To Calibrate:
Caution: anytime the drip tray is removed, place blind portafilter baskets in
each group, to prevent water from dripping on electronics.
• Remove scale platforms and drip tray.
• Enter technician level programming, by holding the G1 continuous
button for 10 seconds, until prompted for a password. (Password is
B1,B2, CONTINOUS,B1,B2,CONTINUOUS).
• Navigate to SCALE CALIBRATION> GROUP 1 SCALE CALIBRATION.
• Follow on-screen instructions.
¤
Empty scale, press enter.
¤
Place 100g weight on scale, press enter.
• The display will flash values for three variables: Ratio, Trials and Quality.
Record these values, and compare to the chart below. If any of these
values are outside of the specified range, contact Technical Solutions.
Ratio
350-400
Trials
2-6
Quality
The difference between the two number should be <300
dry coffee weight
:
beverage weight
ratio
PF
[ ] [ ] [ ]
COF
[ ] [ ] [ ]
PF
0.0
COF
-569
