HF scientific Micro1000 Laboratory Turbidimeter - 0-10,000 NTU - Manual (Page 30)

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8.1.Cuvette Cleaning and Care
Proper measurement of the turbidity of a sample requires the use of a cuvette that is free of marks,
smudges, scratches and any bacterial growth. Any typical glass cleaner can be used along with a lint
free cloth, or tissue, to clean the outside of the cuvette. The inside of the cuvette can also be cleaned
with any typical glass cleaner. Once cleaned, the cuvette should be rinsed thoroughly 8 to 10 times
with clean distilled water to eliminate the possibility of detergent build-up and streaking. Cleaned
and dried cuvettes should be stored with the black light shield cap on the cuvette and can be stored in
a cuvette rack (see accessories and replacement parts list). During normal operation you may use
any typical glass cleaner along with a lint free cloth, or tissue, to clean the outside of the cuvettes.
8.2.Lamp Replacement
Periodically the lamp module will require replacement. Figure 1 illustrates the location of the lamp
module. An error message will be illuminated when it is time to replace the lamp (see
Troubleshooting). We recommended that you keep one spare lamp module for each instrument on
hand at all times to ensure continuous use of the instrument.
Before replacing the lamp module ensure that the instrument is turned off. Once you have turned off
the instrument, proceed with the following instructions:
1. Remove the lamp module from the instrument by squeezing the two side tabs on the module
inward while pulling the module out of the instrument. Pull the module away from the
instrument until the in-line power connector is exposed (about 6-8 inches).
2. Unfasten the connector by holding on to the white in-line connector and pulling the in-line
connector apart. When pulling the in-line connector apart, DO NOT hold on to the wires.
3. The new lamp module can now be connected to the instrument using the in-line power
connector.
4. Feed the wire back into the instrument being careful that the wire does not get in the way of the
lamp or the lamp holder (on instrument). Make sure that the light bulb icon on the back of the
lamp module is upright. Press the module into the instrument until you hear it click firmly into
place.
8.3.Battery Replacement
The Micro 1000 contains a non-rechargeable 10-year life lithium battery for backup of the real-time
clock. This battery is not field replaceable. Failure of this battery will not impede the use of the
instrument, however some time-related activities such as timed printouts will not operate. Contact
the HF scientific inc. Service Dept. for replacement of this item.
Note: The side tabs may need to be pressed outward until they click to secure the new lamp module.
5. If the two side tabs on the lamp module do not click the lamp module securely in place, check
that the power wire is not obstructing the lamp module.
6. Turn on the instrument and follow the instructions in section 4.1 to re-calibrate the instrument
with the new lamp module. The instrument must be re-calibrated after lamp module
replacement.
7. Resume normal operation after recalibrating the instrument.