Milk Frother Tests; Measure Hot Milk Temperature; Measure Milk Froth Ratio - Nespresso EF 451 C 111 Service Manual

9.6

Milk frother tests

Prerequisite
Use newly opened UHT, full fat or semi-skimmed milk at fridge temperature (+ 8 °C till
+ 10 °C) for the following tests only.

9.6.1 Measure hot milk temperature

• Prepare 240 ml hot milk in milk frother (use mixer without spring).
• Measure temperature immediately after preparation in jug.
The milk temperature should be between + 60 °C and + 70 °C (140 °F till 158 °F).

9.6.2 Measure milk froth ratio

• Prepare cold milk froth out of 120 ml milk in milk frother (use whisk with spring).
• Empty content of milk frother into measuring beaker.
• Determine the ratio x [%] of milk froth to liquid milk with following formula:
Approximate values:
direct after preparation ..................................................................................... x = 250
60 sec after preparation.................................................................................... x = 190
H2 H1 –
×
-------------------- -
x = 100
H1
F U N C T I O N T E S T S
H2
H1
Citiz service manual
The disregard of this
specification can
affect the measuring
results.
Spattered milk may
cause burns. Only
use milk frother
with lid.
109