TESTO 6681 Instruction Manual page 53

Analog output 3: Connect measuring cables to terminals for channel 3,
guide measuring cables out of housing and perform measurement
outside of the transmitter, see diagram.
5 Return to Test Analog Output using ESC and continue to Test Relay
Output using  or .
 Testing functionality of relay outputs
1 Press SET, choose between Alarm 1, 2, 3, 4 with  or .
2 Press SET.
The relay can now be tested. You can choose between OFF and ON
using  or . If ON is chosen, the NO contact is closed, the NC
contact opened. If OFF is chosen, the NC contact is closed, the NO
contact opened.
3
To test, route a measuring cable from the relay terminals (see chapter
1.3.2.3) out of the transmitter to a multimeter (resistance
measurement) or continuity tester.
4 Go back to Test Relay Output by pressing either SET (starts relay
test) or ESC (exits the menu without relay test).
 Reading off min./max. values of channels
To reset the max./min. values, see chapter 1.4.6.10, Editing
Reset main menu.
1
Read off the min./max. values of the three channels by pressing  or
 one after the other and return to Main Menu Analysis using ESC.
2 Continue to Main Menu Message using  or  or return to
Measuring Mode by pressing ESC.
testo 6681
- 1.4 Operation 53
1 Channel 1 test
contacts
2 Service interface
3 Channel 2 test
contacts
4 Ends of channel 3
cables
5 Multimeter