Hach-Lange 2100 N IS Laboratory Turbidimeter Basic User Manual - Manual (Page 16)

Note: To print a diagnostic report, hold down PRINT, then turn the instrument on.
Table 4 Diagnostic codes
Code Display Description
21 Pr In Printer test
22 Test results are shown. Display test
23 Test results are shown. Keyboard test
24 Test results are shown. Memory test
Delete calibration data
To delete any calibration data entered by the user:
1. Turn off the instrument.
2. Push and hold CAL.
3. Turn on the instrument.
The CAL? light flashes. The instrument starts in Calibration mode.
4. Calibrate the instrument before use.
Flashing 9s
When manual ranging is selected, the display will flash all 9s when the
sample being measured is greater than the selected range.
When automatic ranging is selected, the display will flash 9s when the
sample is greater than the maximum range of the instrument.
Flashing 0s
When manual ranging is selected, the display will flash all 0s when the
sample measured is less than the selected range.
When automatic ranging is selected, the display will flash all 0s when the
measurement is less than the range of the instrument or a negative
value. Calibrate the instrument.
16 English