13
V
apodest
10
s
6 Errors
6.1. Distillation does not start or is interrupted
Cause of failure and correction
Check cooling water inlet
- Turn on the tap
- Cooling water pressure too low < 0,5 bar.
- Check water supply to the steam generator.
- Steam generator is filled with water, wait till water
is evaporated.
- Overheat protection has activated, turn off the unit
and wait for about 70 min. Should the problem
occur again, call customer service!
- Close the protection door
- Insert the sample tube
- Check the tanks and fill with chemicals
- Put the diode dummy plug on the connection for
level sensor control (only necessary, if the set of
tanks KAN 20 is not used).
Switch on the excess current switch again. If this pro
-
blem reoccurs, call service!
Check water supply to the steam generator.
Cause of failure and correction
Check the chemicals one after the other, get a blank
value, a replacement of the chemicals might be re-
commended.
Increase the amount of water.
Exchange the glass condenser.
Clean the tubes without detergent or rinsing agent.
Extent the distillation time or check whether sufficient
alkali was added.
Error description
Vapodest is not ready for operation (green display
is out)
- No cooling water
- Steam generator is not ready
- protection door opened
- No sample tube
- Chemical tank NaOH or H
2
O is empty
- Diode dummy plug is missing
The excess current switch cuts off in case of ex-
cessive current consumption.
Even though instrument is ready for operation
there is no steam input.
Error description
The chemicals used are contaminated with nitrogen
compounds.
Strong reaction in the digestion tube, caustic soda
drops got into the receiver.
Part of the glass condenser is broken, drops of the
caustic soda got into the receiver.
Tubes are contaminated with nitrogen
Carry over of ammonia from the previous sample
6.2. Results too high
