ALTAIR 5X PID
24
Description
US
Motion Alert Activation Page
When the MotionAlert feature is active, the + symbol appears. The device enters pre-alarm when no
motion is detected for 20 seconds. This condition can be cleared by moving the device. MotionAlert is
turned OFF each time the device is powered OFF. After 30 seconds of no motion, the full MotionAlert
alarm is triggered. This alarm can only be cleared by pressing the S button. This page displays if it
was selected in Setup Mode. To activate or deactivate the MotionAlert feature, press the S button
while the MOTIONALERT ACTIVATION page is displayed.
3.6 Sensor Missing Alarm
Enabled PID and XCell sensors are continuously monitored for proper function. If, during operation,
the PID or an XCell sensor is detected as failed or disconnected, this alarm message appears.
- "SENSOR MISSING" flashes on the display.
- The problematic sensor is indicated.
- The alarm sounds and the Fault and Alarm LEDs flash.
- The alarm can be silenced by pressing the S button; no other pages can be viewed.
3.7 Monitoring Toxic Gases
The device can monitor the concentration of a variety of toxic gases in ambient air. Which toxic gases
are monitored depends on the installed sensors.
The device displays the gas concentration in parts per million (ppm), µmol/mol or mg/m
3
on the Meas-
uring page. Gas units are selected in the SETUP - INSTRUMENT OPTIONS page.
The device has four gas alarms:
- HIGH Alarm
- LOW Alarm
- STEL Alarm
- TWA Alarm
Fig. 6 Alarm Conditions (here High Alarm)
The carbon monoxide channel in the device is equipped with an internal filter. The purpose of this filter
is to protect the CO sensor from acid gases (H2S, SO2, etc.) and from the hydrocarbons that the device
is intended to measure, including the calibration gas, isobutylene. In normal use, an interferent signal
for calibration or bump checking the device should not be observed on the CO channel. However,
exposure to large amounts of certain hydrocarbons (either long exposure times or high concentrations)
can overwhelm the filter and appear as signals on the CO channel.
In normal operation, after the hydrocarbon exposure is ended, the filter is designed to outgas absorbed
hydrocarbons at a rate that will not cause a signal on the CO channel. However, if the unit is exposed
to high temperature (>40°C), this desorption rate increases and spurious signals may be observed on
the CO channel due to gassing of previously absorbed hydrocarbons. Typically the CO sensor will
WARNING
When this alarm occurs, the device is inoperative for measuring gases. The user must exit the
hazardous area, the device must be powered down, and the sensor situation must be corrected.
WARNING
If an alarm is triggered while using the device, leave the area immediately.
Remaining in the area under such circumstances can cause serious personal injury or death.
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