Ultra1000 Wireless Detectors
(Battery Operated)
Rev 2
Page 13
4.
Place and hold the magnet until display indicates the “Calib Sensor” . Move the magnet away
from the cover.
5.
While the Calib Sensor message is being displayed the sensor is making its initial
adjustments. It may take 5 to 10 seconds. (Note: Do not apply calibration gas yet)
6.
Once the initial adjustments are made the sensor will display the concentration of the
calibration gas to be applied. For example the display will show “Cal Gas 50 “. To match
the displayed Cal-Gas reading to the calibration gas bottle being used simply place and hold
the magnet to the cover at 8 o’clock position until the display reads the desired cal-gas value.
Typically the calibration is performed at mid scale. For example, the H2S sensor with the
detection range of 100 ppm the typical calibration gas should be 50 ppm. The selected
calibration gas value will be stored in the non-volatile memory and remains unchanged until
modified.
7.
The microprocessor waits 60 seconds for the user to apply the calibration gas while flashing
the display approximately twice every second. Attach the calibration adapter to the sensor
head assembly and turn the gas on. When the flow of the gas is detected by the sensor the
display flashing rate will slow down to once every second. If no gas is detected within 60
seconds the sensor aborts calibration and will display error message “Calibration Time Out”
for few seconds before returning to normal operation..
8.
Apply the calibration gas for about 2 minutes.
Magnet tool to activate
Internal switch
Figure 4. Activating internal magnetic switch for sensor calibration mode