MSA Ultima X Series Safety Manual

Table 2-2. Expected Alarm Relay States Gas Type
SETPOINT ALARM ALARM RELAY ALARM RELAY
SETTING STATE WITH STATE WITH
ZERO GAS SPAN GAS
APPLIED APPLIED
Lower than Above Set-point Not active Activated
span gas
concentration
Lower than Below Set-point Activated Not Active (NOTE:
span gas If alarm relays are
concentration configured as latching,
the alarm must
be cleared after the zero
gas is removed for this
state to be correct)
Higher than Above Set-point Not Active Not Active
span gas
concentration
Higher than Below Set-point Activated Activated
span gas
concentration
NOTE: Personnel performing the Ultima X proof test should be trained
in SIS operations, including bypass procedures, Ultima X
Monitor maintenance and company management of change
procedures.
Routine Maintenance
Besides proof testing, the following three maintenance procedures that
must be performed on the Ultima X gas monitors.
Periodic Calibration
To ensure accuracy and detect any sensor problems, calibrate the:
• XE and XA monitors a minimum of every three months
• XIR monitor according to the requirements as documented in the
Ultima X Series Gas Monitor instruction manual (P/N 10036101).
Calibrate monitors with catalytic combustible sensors when they have
been exposed to non-combustible chemicals known to reduce sensor
sensitivity (Silanes, Silicates, Silicones and Halides). Use the regular
calibration method given in the Ultima X Series Gas Monitor instruction
manual (P/N 10036101).
2-5

MSA Ultima X Series Specifications

General

Brand	MSA
Model	Ultima X Series
Category	Measuring Instruments
Language	English