Vaisala DMT340 - Manual (Page 137)

Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 135
Example of using relay 1 as fault alarm: selecting relay 1 to follow the
fault status and relay 2 to follow the temperature measurement.
>rsel fault t
Rel1 FAUL above: -
Rel1 FAUL below: -
Rel1 FAUL hyst : -
Rel1 FAUL enabl: ON ?
Rel2 T above: 0.00 'C ? 30
Rel2 T below: 0.00 'C ? -
Rel2 T hyst : 0.00 'C ? 2
Rel2 T enabl: OFF ? ON
Testing the Operation of Relays
Testing activates relays even if they are disabled.
Use the module push buttons to activate the relays. Press the REL 1 or
REL 2 button to activate the corresponding relay.
Use the display/keydpad to test the operation of relays.
1. Open the Main Menu by pressing any of the arrow buttons.
2. Select System
, press the ►arrow button.
3. Select Diagnostics
, press the ►arrow button.
4. Select Relay tests
, press the ►arrow button.
5. Select Invert relay 1... , press TEST. Now the selected relay
output is forced to opposite state. Press OK to return to normal
operation.
6. Press EXIT to return to the basic display.
RTEST
Use the serial line command RTEST to test the operation of the relays.
RTEST [ON/OFF ON/OFF]
Example: Testing all four relays.
>rtest on on on on
ON ON ON ON
>
>rtest off off off off
OFF OFF OFF OFF
Enter the command RTEST to stop testing.