TESTO 523 - Page 11

Using the product 11
Button functions
· : Change measurement value display. Possible display combinations:
- or (only with connected temperature probe) -
- or (only with connected temperature probe) -
· Function button Hold/Min/Max : Freeze measurement values, display min./max. values (since switch-
on, last reset or last switch-over t
oh
<--> t
cu
).
· Function button
RESET : Reset min./max. values. Only available when min./max. values are displayed.
· Function button t
oh
<--> t
cu
: Allocation of the temperature probe measurement value to the low
pressure side (blue) or high pressure side (red). Only available when a temperature probe is connected
and the measured temperature or sub-cooling/super-heating is displayed.
- When the critical pressure of the refrigerant is reached: Measurement
value and display illumination flash.
________________________________________________________________ ________________________________________________________________
Evaporation pressure Condensation pressure
Super-heating
Δ
t
oh
/ t
sh
Sub-cooling
Δ
t
cu
/ t
sc
________________________________________________________________ ________________________________________________________________
________________________________________________________________ ________________________________________________________________
Evaporation pressure Condensation pressure
Measured line temperature. t
oh
Measured line temperature. t
cu
________________________________________________________________ ________________________________________________________________
________________________________________________________________ ________________________________________________________________
Evaporation pressure Condensation temperature
Refrigerant evaporation temperature. t
o
Refrigerant condensation temperature. t
c
________________________________________________________________ ________________________________________________________________
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