Please make sure clamp-on temperature probes are connected as step F
and contacted fully to the refrigeration pipes.
◆ The instrument can calculate the SH - Superheat and SC - Subcooling
as shown below as long as the tested refrigerant is preset and clamp-on
temperature probes are connected well.
6.2. Vacuum operation
A. Turn off the blue valve and red valve.
B. Power on the instrument. Then make sure if the LCD displays vacuum
test status as below picture. If not, press the Function button to switch it.
C. Press the unit button to adjust the reading unit.
D. When the instrument is turned on, there may be 10 digits in the high and
low pressure display area. At this time, press the zero button long until it
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