HF scientific MicroTOL Online Turbidimeter old series- 0-1000 NTU - Manual (Page 33)

MICRO TOL (12/04)
Rev. 2.7 27
8.3 Diagnostic Chart
Symptom Cause Cure
Lower display shows MA 4-20 mA loop open Check wiring. See sections
3.3.4 and 7.5.3
Lower display shows DESC Desiccant pouch bad Change desiccant pouch. See
section 9.2
Lower display shows CAL Calibration failure Refer to sections 5 and 6.1
Lower display shows LAMP Lamp failed Replace lamp. Refer to section
9.3
Lower display shows FLOW Sample flow has stopped Restore flow. Contact HF about
factory installed option
Lower display shows FAIL Major system fault Refer to section 8.1 & 8.2
Readings are higher than
expected (1) Bubbles in solution
(2) Condensate or leaky
cuvette
(3) Flow through cuvette
dirty
Instrument out of calibration
(1)Ensure that the drain vent is
open and is not obstructed.
See section 3.2.2.
(2)Apply backpressure. See
section 3.2 and figure 4
(3) For sever cases of bubbles a
stilling chamber is
available. Call HF scientific.
Part# 20106
Check flow through cuvette for
condensate or leaks.
Clean cuvette. See section 9.1
Recalibrate. Refer to section 5
Readings are erratic (1) Bubbles in solution
(2) Debris in flow through (1) See above
(2) Clean debris from cuvette
Readings are lower than expected Instrument out of calibration Recalibrate. Refer to section 5
Upper display shows O-r Sample Over-Range Check sample. Must be over
1000 NTU.
8.4 Technical and Customer Assistance
If for any reason you need assistance regarding this instrument please do not hesitate to
contact either the HF scientific, inc. Technical Service Department or the HF scientific,
inc. Customer Service Department:
HF scientific, inc.
3170 Metro Parkway
Fort Myers, Florida 33916-7597
Phone: (239) 337-2116
Fax: (239) 332-7643
Email: [email protected]