Model IR4000S
22
The second relay setting is
La
or
nL
for latching or non-latching, respectively.
Apply and remove the magnet to select
La
or
nL
.
The third relay setting is the % LEL setpoint. Available
Lo
setpoints are from
5 to the
Hi
setpoint in 5% LEL increments. Available
Hi
setpoints are from
the
Lo
setpoint to 60% LEL. Apply and remove the magnet to select the
setting. To finish and advance to the next option, apply the magnet when
Fi
(Finish) appears.
5.
Return to normal operation.
When Lo and Hi settings are completed, the
IR4000S will display
Lo
,
Hi
, and
Fi
. To return to normal operation, apply and
remove the magnet when
Fi
(finish) appears.
4.6 Resetting the Relays (rSt )
NOTE:
If the unit was ordered without relays, changing the relay settings will still affect
the operation of the high and low LEDs on the display.
The
rSt
main menu option is provided to reset Warn and Alarm relays; if these relays are
configured as latching, they must be manually reset after an Alarm occurs. The default
setting for the IR4000S Warn relay is non-latching, and the default setting for the Alarm
relay is latching.
NOTE:
Red indicators above and below the digital display are on when the Alarm and
Warn relays are active. Latching relays can only be reset if the gas concentration
has fallen below the respective relay setpoint.
To Reset the Relays:
1.
Open the main menu.
Place the magnet on the IR4000S GM logo to move from
the run display to the main menu options.
2.
Select the rSt option.
After a few seconds, the
rSt
main menu option appears.
Remove the magnet to select this option.
The message
r
appears briefly to confirm that the relays are being cleared. Then the
unit returns to the default normal operation.
Alternate Methods for Resetting the Relays
In addition to the
rSt
menu option, the relays can be reset by connecting a normally
open switch between the IR4000S terminal TB2-7 and TB2-8 (relay reset and COM)
momentarily using a General Monitors explosion-proof switch (P/N 30051-1).
