Hach HIAC ROC User Manual page 20

Figure 11 Error list
Status alarm codes
Table 7 gives the hexadecimal codes shown on the ROC instrument display. The error message and
the decimal equivalent of the error code are shown (as part of the record) on the main screen. The
information is shown when the mouse moves over Status: Error. On the diagnostic screen, it shows
both the hexadecimal and decimal codes along with information about the code. There is a red flag
next to each error that makes up the code.
Note: Combination alarms can occur and make other hexadecimal codes (e.g., a displayed hexadecimal code
value of 140 shows the concentration is low and 4 µm code alarms).
Hexadecimal code
000
001
002
004
008
010
020
040
080
20 English
Table 7 Alarm codes
Description
There are no alarm conditions.
The laser current is low.
The laser current is high.
The photodiode power is low.
The photodiode power is high.
The temperature is low.
The temperature is high.
The concentration is low.
The concentration is high.