Setting The Sensitivity Gauge; Routine Operation - Teledyne 1220 Instruction Manual

Multi-Channel Combustible Monitor
2. If necessary, proceed to the previous or next procedure. Otherwise,
press RUN to place the instrument in the analysis mode.
4.8

Setting the Sensitivity Gauge

NOTE: The sensitivity gauge can only be adjusted when performing a
local (Paragraph 4.3) or "1MAN" (Paragraph 4.4.5.1) span
calibration.
Recommendations:
1. Upon initial installation of a new sensor, use the left or right arrow
key to set the gauge to read "100".
2. Each time that you complete a span calibration procedure, the value
of the sensitivity gauge will be updated to indicate the sensor's
sensitivity (measured relative to its original sensitivity). This can
be used as an estimate of the sensor's remaining life.

4.9 Routine Operation

During routine operation, the system will require no attention unless
an alarm state occurs. In the event of an alarm indication, the audible
alarm may be silenced in one of two ways:
1. Move the AUDIBLE ALARM switch on the system control mod-
ule to BYPASS. This will immediately silence the audible
alarm and also prevent an audible indication from occurring should
another channel go into an alarm state.
2. Press the BYPASS button on the Channel Module. The associated
alarm LED will flash and the AUDIBLE ALARM will be silenced
until the ALARM condition is cleared.
specific alarm channel will be affected. In the occurrence of an
additional alarm in the same channel, or any alarm in any other
channel, the AUDIBLE ALARM will again activate.
In either case, once the audible alarm has been silenced the combusti-
ble gas level may be determined by viewing the LCD display reading on
the channel module. When the level has diminished to less than the alarm
level, the system may be reset by depressing the RESET button.
Teledyne Analytical Instruments
In this case, only the
Operation 4
4-13