User Manual

6 Using the product
17
6.2. Performing the measurement
WARNING
Risk of injury caused by pressurized, hot, cold or toxic
refrigerants!
> Wear protective goggles and safety gloves.
> Before applying pressure to the measuring instrument: Always
fasten the measuring instrument on the suspension attachment
to prevent it from falling down (danger of breakage)
> Before each measurement check the refrigerant hoses for
flawless condition and correct connection. Do not use any tools
to connect the hoses, tighten hoses only hand-tight (max.
torque 5.0 Nm / 3.7 ft*lb).
> Comply with the permissible measuring range (-14.7…870 psi
/ -1…60 bar). Pay particular attention in systems with
refrigerant R744, since these are frequently operated with
higher pressures.
Measuring
✓ The actions described in the chapter “Preparing for
measurement” have been performed.
1. Apply pressure to the measuring instrument.
2. Read the measuring values.
With zeotropic refrigerants, the evaporation temperature
to/Ev is displayed after the complete evaporation / the
condensation temperature tc/Co is displayed after complete
condensation.
The measured temperature must be assigned to the
superheating or subcooling side (t
oh
<--> t
cu
). Dependent on
this assignment, the display will show t
oh
/T1 resp. ∆t
oh
/SH
or t
cu
/T2 resp. ∆t
cu
/SC, depending on the selected display.
- Reading and display illumination are flashing.
• 14,5 psi/1 bar before the critical pressure of the refrigerant is
reached,
• when the max. permissible pressure of 870 psi/60 bar is
exceeded.