Using The Product - testo 523 Bedienungsanleitung

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Using the product

Using the product
Preparing measurement
Connecting t t emperature p p robe:
For the measurement of the line temperature and the automatic calculation
of super-heating and sub-cooling, a Pt100 temperature probe (accessory)
must be connected.
Probes must be connected before switching the instrument on, in order for
them to be recognized.
Open the socket cover on the left-hand side of the instrument.
1
Plug the connection plug of the temperature probe into the probe socket.
2
Depending on the measurement task, position the probe at the end of the
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evaporator (Superheat) or condenser (Sub-cooling).
Switching i i nstrument o o n:
Press .
Zeroing p p ressure s s ensors:
Carry out a zeroing of the pressure sensors before each measurement.
Zeroing is possible in the following range only:
±1bar (rel) / ±14.5psi (rel) and 0...2bar (abs) / ±29psi (abs) resprectively.
The connections on the low and high pressure sides must be depres-
surized (ambient pressure).
Press function button Set.
1
- p=0 flashes.
Press OK to carry out zeroing.
2
Connecting r r efigerant h h oses:
The valve knobs are closed.
Connect refrigerant hoses for low pressure side (blue) and high pressure
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side (red) to the instrument.
Connect refrigerant hoses to the system.
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