E Calibration - Fetco CBS-1261 User Manual

E Calibration

POSITION Program Items
Ready Temp.
E1
Offset
E2 LLC Sensitivity
Slow flow rate
E3
from supply
LT Brew Valve
E4
flow rate:
RT Brew Valve
E5
flow rate:
LT Bypass Valve
E6
flow rate:
RT Bypass
E7
Valve flow rate:
Calibration
E10
Procedure
Check for these causes for the difference in the programmed value to the brewed value. These must be corrected first.
-CSD spray head is not in place. This will always result in an increased flow volume
-Flow related error codes 100, 101 - see page 11. Reduced water flow can cause reduced brew volume.
-Clogged or fouled inlet valve or improperly installed inlet valve. See page 16.
-Bypass turned on and flow is off or incorrect. Bypass flow is calculated into total flow and cause short potting if faulty
-Verify that the controls that the brew time is correct, and the display is operating as the control may be turning off.
-Lime scale. This can cause erratic and sometimes random under or over brew volumes. Brew valve can drip, be stuck
open or closed, or fail due to lime scale accumulation. Always correct lime scale faults before changing flow rate.
Changing the flow rate corrects the brew volume if it is different from the programmed value.
Flow rate can be calculated manually or by the FLOW RATE Calibration procedure (E10) on the next page.
The flow rate calibration procedure is an internal program to test for and enter corrections for flow rate inconsistencies.
In the procedure: the equipment will dispense for 60 seconds. The flow dispensed is carefully measured and entered
into the program. The software automatically corrects the flow rate based on the difference of the actual results to the
stored values.
The procedure requires a calibrated 1½ gallon/6liter container. The flow must be very accurately measured. It will be
easiest to manage the readings if the brewer volume units are placed into ounces or liters for units of measure. [Go to
PROGRAM B6]. Units of measure in gallons require a calculation in fractional units of measure - which can be difficult.
TESTING SHOULD BE MADE WITH AN EMPTY BREW BASKET. NO FILTER PAPER. NO COFFEE OR TEA.
Use this formula to manually compensate for minor discrepancies in actual volume versus programmed volume.
See "PROGRAM" E4 to E7 For valve settings and calibration. Factory set brew valve flow rates are in liter/min
Current setting is the flow from E4,E5, E6, E7
See table above for factory set default flow rates
ACTUAL VOLUME
PROGRAMMED VOLUME
Use this formula to determine the correct setting
EXAMPLE: A three gallon brew was under by one quart (2.75 gallon) Using the formula above and the default flow rate for
the brew valve (134) the new flow rate is 122.8 (rounded to 129). Enter , save and test brew to verify the new volume
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Brewer Sensors and Keypad
Factory set Default Programming Range Increments
-3°F
-2°C
NORMAL
("NORMAL" for
most water)
OFF
1.05 G
3.95 L
134 Oz
1.05 G
3.95 L
134 Oz
0.38G
3.45L
118 Oz
0.38G
3.45L
118
Oz
Start NO+
CURRENT NEW
X =
SETTING SETTING
-2° to -9°F
-1° to -5° C
HIGH
NORMAL
(Biased for reverse
osmosis water or
HIGH
very pure water)
Toggle +/-
OFF/ON
YES or NO
0.89-1.22G 0.01G
3.35-4.65Liter 0.05L
114-157 Oz
0.89-1.22G 0.01G
3.35-4.65Liter 0.05L
114-157 Oz
0.77-1.07 G 0.01G
2.90-4.05Liter 0.05L
99-137 Oz
0.77-1.07 G 00.01G
2.90-4.05Liter 0.05L
99-137 Oz
Press middle button
to activate procedure
NOTE
Default Brew Valve Flow Rate—CBS-1260 Brewers
CBS-1260
Left Brew Valve FR
Right Brew Valve FR
Left Bypass Valve FR
Right Bypass Valve FR
Set FR lower to increase volume; set higher to decrease volume.
User Guide & Operator instructions
Page 10
Notes
1°F Compensates output to measured
1°C temperature
Liquid level control sensitivity.
High,1300Ω is for reverse
osmosis water or very pure water.
Trims fill system for reverse
osmosis, low supply or Flojet use
Adjusts flow rate
1 Oz
Adjusts flow rate
1 Oz
Adjusts flow rate
1 Oz
Adjusts flow rate
1 Oz
Follow directions om next page
Ounces/minute
134
134
118
118
2.75
3.00
P214 September 2023
Range
114 to 157 Oz
114 to 157 Oz
99 to 137 Oz
99 to 137 Oz
X =
134 129