AccUView LED (1/2020)
Rev 2
28
10.0 Troubleshooting
10.1 AccUView LED Fault Detection
The AccUView LED performs continuous diagnostic monitoring. In the AccUView LED
there are three levels of fault detection; warnings, errors and failures. Any faults are
displayed in a queue form in the bottom row of the LCD.
A
warning
is simply a screen indication of a problem. No alarms are activated. If the
desiccant alarm is turned off and the desiccant becomes saturated, a screen warning of
DESC
will appear. At power-up for 30 minutes and at operating temperatures outside of
our specifications, the %T or ABS reading may flash. When this happens the reading may
be outside of the stated tolerance.
An
error
indicates a fault or a problem that usually can be corrected by the operator.
These errors consist of lamp low output (
LAMP
), 4-20 mA loop open (
MA
), bad 100% T
or 0 ABS calibration (
CAL Err
), bad temperature compensation calibration (
TECO
), if
desiccant alarm activated and replacement required (
DESC
), if enabled no flow (
FLOW
)
(if equipped with the optional flow switch). An additional message will indicate that the
ultrasonic transducer is not making contact or the flow through has been removed (
CLN
).
If any of these conditions occurs, both alarm relays will be activated and the 4-20 mA
output will be held at 2 mA. If any of these errors occur the instrument will still display
readings, however the accuracy is not known and the instruments readings should not be
trusted.
A
failure
is a system fault. This is NOT a problem that the operator can correct, and the
unit must be returned to the factory for service. These failures consist of failures in the
CPU, A/D, EEPROM or other devices internal to the instrument (
FAIL
). If a failure
occurs, the instrument will not function properly and will display the word FAIL on the
lower row, both alarm relays will be activated and the 4-20 mA output will be held at 2
mA (if 4-20 mA is selected).
If any fault conditions occur, the message indicating the fault will be shown on the lower
row of the display.
10.2 System FAIL Message
Normally, this condition indicates that the instrument will require servicing. Contact either
the HF scientific, Technical Service Department or the HF scientific, Customer Service
Department.
HF scientific
3170 Old Metro Parkway
Fort Myers, Florida 33916-7597
Phone: (239) 337-2116
Fax: (239) 332-7643
Email: [email protected]
www.hfscientific.com
