Hanna Instruments PCA 300 Series - Manual (Page 48)

48
DIAG
RELAY TEST
In the relay test mode all three alarm relays close for about
one second.
1. Press DIAG . The display will show the last diagnostic
mode and the right-most numerical digit will blink.
2. Enter code 501 using the and keys. After the code is
selected display will show “d501”.
3. Press DIAG. The display will blink “ON” and “OFF”, then
the display will automatically return to the last concentra-
tion reading.
CALIBRATION PROCEDURE
1. Withdraw a sample of the measured liquid direct from the
drain port of the measuring cell (#11) by opening its valve
(#12).
Note: withdraw the sample just before the electrovalve
stops the liquid flow to the measuring cell.
2. With a calibrated meter take a measure of
the sample. This is the calibration value.