HF scientific Micro1000 Laboratory Turbidimeter - 0-10,000 NTU - Manual (Page 13)

Rev. 3.2 7
5. Completely fill the rinsed cuvette (from step 4) with the remaining portion (approximately 30
ml) of the grab sample and then cap the cuvette with the black light shield. Ensure that the
outside of the cuvette is dry, clean and free from smudges.
6. Place the cuvette in the instrument and index the cuvette to the lowest reading (the displayed
turbidity is updated once a second). Once the cuvette is indexed, the reading displayed on the
instrument's display should be recorded as the sample turbidity (see Glossary for more
information on indexing a cuvette).
7. If you have turned off the printer output in the customer setup section, pressing the key at this
time will output data to the RS232 port.
Repeat steps 2 through 7 for all of your samples.
4.3. Pour Through Sample Measurement (Optional Accessory)
Install the pour through assembly and index it according to the instruction sheet that accompanies
the assembly. The following steps describe how to measure the turbidity of a sample using the
instrument fitted with the optional pour through assembly:
1. Turn on the instrument. The instrument will be in the normal automatic mode. Allow
instrument to warm up for at least 30 minutes.
2. Sample approximately 500 ml of the process as you would normally do for turbidity
measurement.
3. Pour the complete 500 ml sample into the pour through assembly. Record the turbidity of the
sample displayed after the entire 500 ml sample has been poured into the assembly, the flow to
drain has ceased, and after the reading has stabilized.
4. If you have turned off the printer output in the customer setup section, pressing the key at this
time will output data to the RS232 port.
5. Repeat steps 2 through 4 for all of your samples.
The sample cuvette used in the pour through assembly is identical to the standard sample cuvettes
supplied with the instrument. Clean the cuvette on a periodic basis according to your experience
with the type and turbidity of the sample found in your facility.
4.4. Flow Through Sample Measurement (Optional Accessory)
Install the flow through assembly according to the instruction sheet that accompanies the assembly.
The following steps describe how to continuously measure the turbidity of a sample stream using the
instrument fitted with the optional flow through assembly:
1. Turn on the instrument. The instrument will be in the normal automatic mode. Allow
instrument to warm up for 30 minutes.
2. Initiate flow of the sample to the instrument and allow 2 minutes for the flow to stabilize prior to
recording the measured turbidity.
3. Begin to record the turbidity readings at the desired intervals.
4. If you have selected timed printer output in the customer setup section you should be able to
monitor the process in real time using PC data acquisition software.
The sample cuvette used in the flow through assembly is identical to the standard cuvettes supplied
with the instrument. Clean the cuvette on a regular basis according to your experience with the type
of turbidity sample found in your facility.