High Technology, Inc.
109 Production Road,
Walpole MA 02081 USA
Document Number
OM-E-FC-360-30
Revision Level
Rev. 3
Prepared by
J.S. Bolio
Approved by
S. Titov
Effective Date
8/15/2016
Operator’s Manual: HTI BioChem FC-360
HIGH TECHNOLOGY, INC. PROPRIETARY AND CONFIDENTIAL
Page 173 of 222
It is also necessary to replace the Reference Electrode every six months or when the red ball indicator no
longer floats in the internal electrode solution, whichever comes first. Failure to replace the Reference
Electrode at this interval will cause all three of the errors mentioned.
Ensure that the ISE Module is properly grounded.
Flow problem
Observation
Probable cause
Action
Low Slope Na+ or K+ <52
mV/decade
Cl- <40mV/decade, Li+<47mV
mV/decade or High Slope Na+,
K+, or Li+>64 mV/decade
Misalignment of the
electrodes
Remove electrodes.
Inspect O-rings. Reassemble properly.
Calibrator solutions
Replace Reagent Pack.
Cl- >55 mV/decade
Electrode (low slope).
Replace electrodes.
Air bubble on reference
Remove electrode, tap to electrode
membrane. Dislodge bubble, replace, and
recalibrate.
Reference electrode.
Replace reference electrode and retest.
ISE Module or fluid
temperatures exceed 32°
C. (high slope).
Decrease the environment temperature.
Noise Error Flag Single
electrode.
Electrode.
Replace problem electrode and
recalibrate.
Noise Error Flag Multiple
electrode.
Electrode.
Replace reference electrode and
recalibrate.
Electrical noise spike from
environmental source.
Contact Technical Support
Component failure on ISE
Module board.
Contact Technical Support
Drift Error Flag Single Electrode
May occur when new
electrode or Calibrant A is
installed.
Purge the Calibrant A and recalibrate the
ISE Module. If the electrode is new it may
initially drift as it rehydrates over the
course of 15 minutes.
Electrode.
Replace the electrode and recalibrate.