Hach DR300 Service Manual page 57

Error Description
E-10 Environment
temperature too
high or too low
E-12 Low battery
power
E-13 Parameter load
failure
E-14 Zero
measurement
invalid
E-15 Absorbance too
high
E-20 Signal
measurement
out of range
User action recommendations
The ambient temperature is out
of range. Use the instrument only
in the specified operating
conditions. Refer to
Specifications on page 3.
Battery power is too low.
Replace the batteries. Refer to
Install the batteries on page 9.
The memory of the instrument is
defective. Contact technical
support.
The zero measurement is too
low. Use a sample cell filled with
water and try again. If the error
continues, contact technical
support.
Identify if there is a light blockage
in the cell holder. Clean the cell
holder. Dilute the sample. Do the
test again.
Note: This instrument can not read
absorbance values higher than
3.5 Abs.
There is too much light on the
light detector. Make sure that the
instrument cap is fully installed
on the cell holder. Do the test
again. If the error continues,
contact technical support.
Technical information including troubleshooting action
items (only for Service Operator)
The ambient temperature was measured out of range. Probably
the instrument was used out of spec temperature. (T < -20°C or
T > 70 °C)
+ Check/read the service log for possible other error messages.
> Replace the mainboard on page 42
Battery power is too low. Error appears between 0-2% battery
capacity.
+ Check/read the service log for possible other error messages.
Check battery power.
> Replace batteries
Check battery contacts got appropriate contact to mainboard.
> Replace the battery contacts
> Replace the mainboard on page 42
The DR300 chemical parameters could not be loaded (neither
from filesystem nor from backup). The device is not capable to
function without and is therefore locked.
+ Check/read the service log for possible other error messages.
> Update mainboard firmware and parameter setting.
> Replace the mainboard on page 42
Signal of zero measurement is too low. Zero - High Frequency
< 1 KHz
+ Check/read the service log for possible other error messages.
> Use water vial and try again.
> Replace LED
> Replace optical filter
> Replace detector
> Replace the mainboard on page 42
Absorbance was read > 3.5 Abs.
+ Check/read the service log for possible other error messages.
Check if beam path (cell compartment) is blocked.
> Clean cell compartment.
Check the absorbance reading in 'service mode'.
Check absorbance values for service test kit vials.
> Replace detector
> Replace the mainboard on page 42
> Replace LED
> Replace optical filter
Too much signal on light detector. Zero or Read signal - High
frequency > 500 KHz
+ Check/read the service log for possible other error messages.
Check the absorbance reading in 'service mode'.
Check absorbance values for service test kit vials.
Check optical aperture in front of LED is still in place.
> Replace optical aperture
> Replace optical filter
> Replace LED
> Replace detector
> Replace the mainboard on page 42
Troubleshooting
on page 49
55