© 2021 All rights reserved. Data subject to change without notice.
39
Rev. E | 2021.03
LPT - Operation Manual
move to IDLE position before the zeroing is fi nished and the transmitter will return to normal
operation (solid green light on the front).
If the z
ero is out of range but within the override range, the LED will fl ash. To override, move the
concentration jumper to the OVER position. If Jumper-1 is not moved to the OVER position in 30
seconds, the current loop will output 20 mA and will stay there until you move the Jumper. After
using the OVER position, Jumper-1 should be returned to the gas selection position (GAS1, GAS2
or GAS3).
If the sensitivity of the sensor is calculated out of range more than the OVER can compensate for,
the in
ternal LED will turn on solid, the front LED will remain off and the current loop will output 20
mA indicating the sensor cannot be calibrated. You can try to recalibrate, starting from step 2, to
confi rm the procedure was followed correctly and this may correct the fault.
9 ACCESSORIES
9.1 Splash Guard
p/n:
S
The splash guard attaches to the front of the enclosure to protect the
sensor during water spray or washdown applications. It is factory
installed and when attached the enclosure meets IP54 standards. To
calibrate a device with a splash guard, use the Cal Clip.
NOTE:
A specialize splash guard (Option -SN) must be used for sticky gas sensors like Chlorine (Cl
2
).
NOTE:
A splash guard will slow down the response time of the sensor.
