Hach-Lange 2100 N Laboratory Turbidimeter User Manual - Manual (Page 40)

Replace a fuse
D A N G E R
Fire hazard. Use the same type and current rating to replace fuses.
Replacement parts:
• Fuse for 115 V operation, time-delay, 250 V, 1.6 A (3030700), or
• Fuse for 230 V operation, time-delay, 250 V, 1.6 A (3030600)
To replace a fuse, refer to the illustrated steps in Figure 11 .
Figure 11 Replace a fuse
Troubleshooting
Refer to the tables in this section for error codes, diagnostic codes,
common problem messages or symptoms, possible causes and
corrective actions.
Error codes
Table 7 lists the error codes shown for different conditions. Error codes
identify instrument malfunction or operator error.
The instrument continues operation in an error condition.
Push ENTER to clear an error code from the display.
Note: Any calibration being calculated when an error occurs, is discarded. The old
calibration is kept.
Table 7 Error codes
Error Description Solution
ERR01 The turbidity of the
dilution water is
greater than 0.5 NTU.
Start the calibration again with lower turbidity
dilution water.
Note: Ignore ERR01 when the sample cell diameter is
less than 25 mm. Push UNITS/Exit to go back to
measurement mode.
ERR02
• Two calibration
standards have the
same value.
• The difference
between two
calibration
standards is less
than 60.0 NTU.
• The turbidity of
Standard 1 is too
low (less than
10 NTU).
1. Inspect the preparation of standards.
2. Do the calibration again.
Note: Ignore ERR02 when the sample cell diameter is
less than 25 mm. Push UNITS/Exit to go back to
measurement mode.
38 English