Product Overview - Hach DR 900 User Manual

2. The equipment must accept any interference received, including
interference that may cause undesired operation.
Changes or modifications to this equipment not expressly approved by
the party responsible for compliance could void the user's authority to
operate the equipment. This equipment has been tested and found to
comply with the limits for a Class A digital device, pursuant to Part 15 of
the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated
in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference
to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be
required to correct the interference at their expense. The following
techniques can be used to reduce interference problems:
1. Disconnect the equipment from its power source to verify that it is or
is not the source of the interference.
2. If the equipment is connected to the same outlet as the device
experiencing interference, connect the equipment to a different
outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the
interference.
5. Try combinations of the above.

Product overview

The DR 900 is a portable, LED-sourced colorimeter that measures at
wavelengths of 420, 520, 560 and 610 nm. The instrument is used to
measure various parameters in drinking water, wastewater and industrial
applications. The instrument comes with a complete set of stored
programs (pre-installed methods) and the availability of user program
storage and favorite program selection. Refer to
Figure 1 Instrument overview
1 USB port
2 Instrument cap
3 Cell compartment
Product components
Make sure that all components have been received. Refer to
any items are missing or damaged, contact the instrument supplier or a
sales representative immediately.
Figure 1.
4 Vent
5 Battery compartment
6 Power key
Figure 2. If
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