Hydrogen Sensor; Ozone Sensor - Hach ORBISPHERE 31 Serie Manual De Instrucciones

Hydrogen sensor

Problem
Sensor won't calibrate, even after
thorough servicing.
"0000" H levels displayed.
2
Shorter than expected sensor
operation in relatively high H
concentration.
Unexpected or inaccurate H
readings.

Ozone sensor

When the O sensor has been properly calibrated using the ORBISPHERE measuring instrument,
3
the sensor has to settle down for up to 24 hours when used in very low O
Problem
Sensor won't calibrate, even after
thorough servicing.
"0000" O levels displayed.
3
Unexpected or inaccurate dissolved
O readings.
3
Probable cause
Repeated calibrations go beyond
"expected limits" of instrument.
Wrong reading scale "XXXX"
selected for display unit.
High H concentrations require
2
more work from electrochemical
2
sensor.
2
High residual current.
Probable cause
Repeated calibrations go beyond
"expected limits" of instrument.
Instrument internal barometric
pressure sensor needs calibration.
Wet membrane interface.
Wrong reading scale "XXXX"
selected for display unit.
High residual current.
Insufficient flow rate.
Length of sample line allows O
time to react.
Doesn't match lab samples.
Possible solution
MOCA 3600 only: Select membrane
from "Options/Membrane" menu.
Then, calibrate the sensor.
Change reading scale by selecting
"X.XXX, XX.XX or XXX.X".
Shut off analyzer when not needed.
If concentration is significantly
higher than low limit, try a sensor
service.
concentration conditions.
3
Possible solution
MOCA 3600 only: Select membrane
from "Options/Membrane" menu.
Then, calibrate the sensor.
Calibrate internal barometer against
a certified barometer. Do not correct
for sea level !
Wipe dry with a tissue and re-
calibrate.
Change reading scale by selecting
"X.XXX, XX.XX or XXX.X".
If concentration is significantly
higher than low limit, try a sensor
service.
Regulate flow equivalent to
membrane specified levels.
3
Reduce length of sample tubing.
Take samples at close proximity to
sensor.
English 17