Calibration Process; Water Flow Test And Adjustment - Bunn JDF Silver Series Technical Training Manual

Calibration Process

The following process needs to be completed for all dispense stations.
Step 1: Identify the desired mix ratio for the product being used, (usually found on the product container), and mark
the product ratio on the total dispense ratio chart.
Step 2: Conduct water flow test to determine known volume of water dispensed.
Step 3: Perform total dispense test to determine total volume of water and product dispensed.
Step 4: Use the total dispense ratio chart to determine if total dispense matches the ratio target.
Step 5: Make pump speed adjustment if total dispense does not match desired ratio target.
The procedures for conducting a water flow test, and total dispense test are explained in detail below along with the
procedure for making a pump speed adjustment.
Water Flow Testing and Adjustment
Tools Required:
• 64 ounce pitcher (BUNN P/N: 04238.0000) or graduated measuring cup (BUNN P/N: 33095.0000).
Step 1: Place a graduated measuring cup or the large chamber of the empty brixing
cup (BUNN-O-MATIC part number 33095.0000) under the appropriate dispense
nozzle. Place the Program switch in the ON position.
Step 2: Press and release the desired "Product Dispense Switch" three times. (On
Portion Control models, use the plus/stop switches)
Step 3: The selected position will dispense water (no concentrate) only for 3 seconds.
Step 4: Measure the water dispensed.
Step 5: Adjust the water flow rate with a 1/4 allen wrench, (clockwise to increase flow
rate; counterclockwise to decrease flow rate) to the corresponding product mix
ratio as follows:
Mix Ratio
(water + concentrate)
2+1
4+1
5+1
3+1 through 7+1
Above 7+1
High Viscosity Juice
*Maximum flow rate may be less depending on the water pressure supply at each location.
Note: Information for specific products listed in this table is to be used for reference only. Consult the product label for
exact mix ratio and/or brix %. See product label for target brix %.
Step 6: Repeat steps 1 through 5 as necessary until the correct water flow rate is achieved and record the total
dispensed water for each dispense station.
Step 7: Repeat steps 1 through 5 for the remaining dispense positions.
Step 8: Place the Program switch back into the OFF position.
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JDF Silver Series Training Manual
Adjust water flow rate to:
*3.75 fl. oz (111 ml)
per 3-second test
*4.0 fl. oz (118 ml)
per 3-second test
*4.0 fl. oz (118 ml)
per 3-second test
2.25 - 3.0 fl. oz (66.5 - 89 ml)
per 3-second test
Product
Prune Juice
Other
Orange Juice
Pineapple Juice
Cranberry Fruit Cocktail
Grapefruit Juice
Lemonade
Apple Juice
Fruit Punch
Grape Juice
Other
Other
As Required
Brix %
16.0%
*
11.8%
12.8%
14.0%
10.6%
12.0%
13.0%
*
*
-