Hach HIAC PODS, Basic User Manual

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Table 4 Screen: SIZ
Programmable size menu. When MODE is set to P/1 ml or P/10 ml, the
PG2 menu becomes available for any of the eight size channels to be
programmed. The minimum and maximum size program limit is 4.0 to 68.0 μm.
The size must be programmed in an ascending order from the smallest size on
channel 1 to the largest size on channel 8.
Note: If needed, use F2 (DEFAULT) to reset all sizes to factory default settings.
Table 5 Screen: I/O
Variable Description
UNIT_ID Sets a unique device address that is used in the serial communication
of the instrument MODBUS protocol (01–99).
CNTRL Set to LOCAL when the instrument is manually operated. Set to
REMOTE when a computer program operates and controls the
instrument sampling. Set to DOWNLOAD when a computer program
retrieves the records from the sample buffer only. The setting of this
variable can also be changed automatically through the serial
MODBUS protocol (LOCAL, REMOTE or DOWNLOAD).
Table 6 Screen: CLK
Variable Description
TIME Current time in 24-hour format (Hours/Minutes/Seconds)
DATE Current date (Month/Day/Year)
Operation
W A R N I N G
Chemical exposure hazard. Obey laboratory safety procedures and
wear all of the personal protective equipment appropriate to the
chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
C A U T I O N
Chemical exposure hazard. Dispose of chemicals and wastes in
accordance with local, regional and national regulations.
Procedure to take a sample
Use proper techniques to take a sample. It is important to get a
representative sample of the contamination level of the system under
test. Take the sample from a source with moving fluid.
Note: If the sample is taken from a slow-moving stream, a non-representative
sample can result. Let the system run for at least 30 minutes before a sample is
taken.
Note: The Filter mode is no longer active. Use one of the other modes to take a
sample.
When a series of tests is complete, there is still some sample inside the
instrument. This instrument must be flushed with a fluid that does not
contaminate the next sample. To flush the instrument:
1. Use the same fluid type as intended for the next sample. Do not mix
fluid types. If other fluid types are used, fluid incompatibility causes
sampling errors.
2. If an online operation is used, the instrument is flushed with the fluid
to be tested. For proper flush of the instrument, the flush volume
must be approximately twice that of the internal volume of the
hydraulic hose that connects the instrument to the system to be
tested.
3. Do a maximum flush before a sample is taken to make sure that an
accurate sample measurement. To flush the instrument, refer to
Flush the instrument in bottle mode on page 13 or Flush the
instrument in the online mode on page 13.
Note: An excessive amount of flushes causes prematurely clogged filters.
Prepare to take a sample with a bottle
Common sources of contamination inadvertently added to fluid samples
come from the bottles, pick-up tube, and airborne particles. Use only
clean sample bottles and keep them covered at all times.
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