TESTO 523 Instruction Manual page 11

Button functions
· : Change measurement value display. Possible display combinations:
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Evaporation pressure
Refrigerant evaporation temperature. t
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- or (only with connected temperature probe) -
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Evaporation pressure
Measured line temperature. t
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- or (only with connected temperature probe) -
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Evaporation pressure
Super-heating Δt
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Hold/Min/Max
· Function button
on, last reset or last switch-over t
RESET
· Function button
t
· Function button
oh
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.
o
oh
/ t
oh sh
: Freeze measurement values, display min./max. values (since switch-
<--> t
oh cu
: Reset min./max. values. Only available when min./max. values are displayed.
<--> t
: Allocation of the temperature probe measurement value to the low
cu
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Condensation temperature
Refrigerant condensation temperature. t
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Condensation pressure
Measured line temperature. t
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Condensation pressure
Sub-cooling Δt
/ t
cu
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).
Using the product 11
c
cu
sc