Connecting Probes/Sensors - TESTO 521 Instruction Manual

4.3 Connecting probes/sensors

Connect the probes / sensors before switching the
instrument on. Probe-specific characteristics are only
read in when the instrument is switched on. Make
sure the connections are secure, but do not use force!
Connect the plug/hoses of the probes/sensors to
the corresponding connections of the instrument:
1 Pressure hoses at p+ and p-
Make sure the pressure hose does not jump
away from the connection socket!
Risk of injury!
Always use the screw locking device to secu-
Caution
re the pressure hose at pressures above 700
hPa.
2 Socket „1" and socket „2":
Thermocouple probe (type K), NTC probe, pressu-
re probe, power supply cable
4. Commissioning
4.3 Connecting probes / sensors
13