User's Manual

6 Using the product
14
Display Mode Function
display.
This mode is especially suited to air
conditioning systems which cool and
heat.
6.2. Performing the measurement
WARNING
Risk of injury caused by refrigerant that is at high pressure,
hot, cold, or poisonous!
> Wear safety goggles and protective gloves.
> Before pressurizing the measuring instrument: Always fasten
the measuring instrument at the suspension device in order to
prevent it from falling (risk of breakage)
> Check if the refrigerant hoses are intact and connected
correctly before each measurement. Do not use a tool to
connect the hoses. Only tighten the hoses by hand (max.
torque 5.0 Nm/3.7 ft*lb).
> Maintain permissible measuring range (0 to 50 bar). Pay
particular attention with systems with refrigerant R744, as
these are often operated with higher pressures.
Measuring
✓ The steps described in the chapter "Preparing for
measurement" have been completed.
1. Pressurize the measuring instrument.
2. Read off readings.
With zeotropic refrigerants, the evaporation temperature
to/Ev is displayed after the complete evaporation/the
condensation temperature tc/Co is displayed after the
complete condensation.
The measured temperature must be assigned to the
superheating or the subcooling side (t
oh
<--> t
cu
).
Depending on this assignment, t
oh
/T1 or Δt
oh
/SH or
t
cu
/T2 or Δt
cu
/SC is shown depending on the selected
display.