MSA Ultima - Optional RESET Push-button; General; RESET Button Selection

• Ultima sensor is not connected properly or
• Ultima Gas Monitor internal fault or
• An inoperative relay.
• Fault Relay PULSED (once per minute) indicates:
• Under-range reading on the display or
• Improper calibration of the Ultima Gas Monitor or
• Multiplex Ultima Gas Monitor with address set
improperly or
• Ultima Gas Monitor CAL or CAL fault displayed
(FIGURE 2-2).
Optional RESET Push-button
General
A RESET button is an optional feature to allow latching relays to
be reset at the sensor location.
• This may silence any alarm horns or turn OFF any equipment
connected to the relays.
• Latching relays can be configured on the Ultima Monitor via the
Ultima Controller. Refer to the Ultima Controller manual (P/N
813379) for explicit instructions.
• In a latching configuration:
when the RESET button is pushed and any alarm is
latched and not in its active alarm state, the alarm
will reset.
NOTE: An IR command can mimic the pushbutton as
described in the Controller and Calibrator manuals.
• In a non-latching configuration:
the RESET button has no affect on the alarms.
RESET Button Selection
The RESET push-button can be acquired locally and wired to the
Ultima Gas Monitor during unit installation. The RESET
push-button ratings, however, must meet or exceed the area
classification where the button is to be used.
• Install an explosion-proof push-button with the appropriate
rating in an area classified as a hazardous area.
"!
WARNING
Do not install a push-button that is rated for a
general-purpose area in a location classified as a hazardous
Appendix C, Internal Relay Option
C-6