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Table 1 Troubleshooting and Error Codes (continued)
Error
Code
E09
Calibration error or
instrument is not cali-
brated.
FFF
Turbidity is >440 NTU
Extremely high ambient
light
Cause
Possible Solution
Redo the calibration.*
Call Hach Service.
Dilute the sample with turbidity-free
water to within the range of the instru-
ment and reread the sample.
Make sure the instrument cap is properly
installed as a light shield. Read and fol-
low the instructions in Controlling Ambi-
ent Light on page 16 .
35
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