Hach-Lange ISENH318103 User Manual - Manual (Page 11)

Note: After long-term storage, the ISENH3181 probe (with membrane module assembled)
might need to be conditioned in Ammonia probe storage solution for up to 30 minutes to
improve the stabilization speed.
Troubleshooting
Message or symptom Possible cause Action
Probe not supported
Software not updated To download the most current version of the
software, refer to the applicable product page on the
manufacturer's website.
Refer to the HQd Series meter manual for specific
instructions for the meter model.
HQd meter does not support
IntelliCAL
® probe
Contact a Technical Support Representative.
Connect a probe or probe
requires service
Probe not connected properly Disconnect, then connect the probe. Tighten the
locking nut.
Software not updated To download the most current version of the
software, refer to the applicable product page on the
manufacturer's website.
Refer to the HQd Series meter manual.
Large number of methods stored on
probe. Continue to let probe connect. Do not disconnect
probe.
Damaged probe Make sure connectivity with another probe or meter
to confirm isolated issue with probe. Contact a
Technical Support Representative.
mV reading is the same for all
solutions Soaker bottle not removed Remove the soaker bottle.
Electrical issue Contact a Technical Support Representative.
Slow response time
Dirty sensing element Clean the probe (body, membrane module and glass
bulb). Refer to
Clean the probe on page 10.
Membrane failure Replace the membrane module.
Dirty filling solution Replace the filling solution.
Low sample temperature or
temperature difference between
samples Check the sample temperature. The lower the
temperature or the greater the difference of
temperatures between samples, traditionally the
longer the response time.
Bubbles trapped under sensor tip Gently shake the probe until bubbles are removed
from under sensor tip.
Slope out of range (refer to
Check probe response
on page 13)
pH is incorrect Make sure the pH is > 11 after each ISA addition.
Ionic strength adjustor (ISA) not
used Add ISA to each sample and standard (one powder
pillow per 25 mL of solution).
Insufficient conditioning Condition for at least in ammonia probe storage
solution.
Damaged probe Contact a Technical Support Representative.
Incorrect standards Calibrate using freshly prepared standards.
Dirty sensing element Clean the probe (body, membrane module and glass
bulb) and recalibrate.
Bubbles trapped under sensor tip Gently shake the probe until bubbles are removed
from under sensor tip.
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