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15.5 DIAGNOSTIC INFORMATION
The printed circuit board inside the
ViscoSense
®
3
controller has a provision for diagnostic indication.
Failures and errors are displayed by a blinking digit or character on a 7 segment LED. Dependent on
the type of failure, error or warning, the viscosity and/or temperature outputs will go to 0, 4 or 20 mA,
or will remain functioning normally.
If there is no failure, error or warning, the display indicates the state of the program by displaying a
symbol (not blinking) on the display.
The following symbols are displayed during normal operation:
Display
Description
Display
Description
Start-up of interface box and self-test
Adjusting phase
Start-up of pendulum
Adjusting amplitude
Measuring negative phase
Measuring positive phase
During start-up the current outputs will be 4 mA.
When the display turns into 2. , 3. , 4. , 5. , or 6. after start-up of the interface box (0.) this indicates
an error in software or electronics of the interface box.
The decimal point at the bottom of the display is always on after power is on. This point is only turned
off while the
ViscoSense
®
3
is writing to EEPROM, and if no measurement is possible due to extensive
external vibrations.
Normally the
ViscoSense
®
3
electronics will try to restart the unit if a faulty situation occurs. However,
if the fault is persistent contact VAF Instruments or your local authorised VAF dealer and give a
detailed description of the problem that occurred and the diagnostic information indicated at the 7
segment LED.
