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© 2021 All rights reserved. Data subject to change without notice.
LPT - Operation Manual
Rev. E | 2021.03
a slight twisting motion as you gently push the calibration adapter into the sensor opening. If the
calibration adapter is hard to insert, moisten the O-ring seal slightly then try re-inserting it. If the
optional splash guard is installed, slide the Cal Clip around the splash guard and attach the tubing
to the nozzle on the Cal Clip.
Step 4:
Open regulator valve fully allowing Oxygen gas to fl ow over sensor for 3 minutes to 5 minutes. If
the meter is attached, the voltage reading should be close to the span gas concentration being
used.
NOTE:
If an inappropriate concentration of span gas is applied during calibration, calibration may
succeed but it does not mean the equipment has been calibrated properly. CETCI is not responsible
for improperly calibrated transmitters. Follow manual instructions carefully.
Step 5:
Once the reading on the voltage meter is stable you can start the calibration. Move Jumper-2 from
IDLE to CAL. If the SPAN calibration is successful the LPT will blink the LED eight times indicating the
SPAN has been completed.
If this is a daily or weekly calibration and no N
2
is available, move Jumper-2 back to IDLE and the
SPAN calibration will be completed and the internal LED pattern will change to fl ash four times and
then pause with the LED off .
Step 6:
Switch to NItrogen calibration gas (N
2
99.99 %).
When the gas fl ow is detected, the internal LED
pattern will change to fl ash four times and then pause with the LED on. During this time the current
loop will follow the gas level based on the ideal span of the sensor.
The zeroing can be cancelled at any time by removing the Jumper-2 from the CAL position and
