3
Preliminary Examination
1. PRELIMINARY EXAMINATION
HI6421
is an advanced dissolved oxygen benchtop meter with a large touchscreen display and streamlined design.
HI6421
is delivered with either an optical dissolved oxygen probe (
HI7641133
) or a polarographic probe
(
HI764833
).
Benchtop models
HI6421‑01
US power plug
HI6421‑02
EU power plug
Package contents
Ordering code
HI6421
is delivered with:
•
HI7641133
optical DO probe (opdo
®
)
•
HI764113‑1
Smart Cap™ with O‑ring
• Calibration / storage vessel
• Syringe, lens wipe, silicone grease (6 g sachet)
• DO Smart Cap quality certificate
Ordering code
HI6421P
is delivered with:
•
HI764833
polarographic DO probe
• Membrane cap with O‑ring (2 pcs.)
•
HI7041S
Electrolyte solution (30 mL)
Additionally,
both
ordering codes
are delivered with:
•
HI764060
electrode holder with following accessories:
•
base plate (integrated pivot pin) and screw, requires installation
•
cable holder clip, attached
•
electrode holder with adapter, attached
• 24 VDC power adapter
• USB‑C to USB‑A cable
• Probe quality certificate
• Instrument quality certificate
• Quick reference guide
Note:
Save all packing material until you are sure the instrument works correctly. Any damaged or defective item
must be returned in its original packing material with the supplied accessories.
2. HANDLING AND USAGE PRECAUTIONS
The unit, while not fragile, can be damaged by improper handling and usage.
• Transport the unit with all cables removed.
• Keep the unit on a stable and even surface, away from contact with liquid.
• Avoid excessive dirt and dust.
• Protect the unit from contact with food, oils, and chemicals.
• If the device becomes wet, gently wipe the exterior with a clean, dry cloth.
• Keep away from direct sunlight.
• Use in a safe place that is appropriate to application requirements.
• Use attachments and accessories specified in this manual only.
• Capacitive touchscreen and buttons – operate without applying pressure.
• Do not puncture the capacitive touchscreen or drop the unit.
• Do not use the device near heat sources.
• Do not place objects on top of the device.
• Do not insert objects into the ports, spaces around keys, other than the intended cable, USB drive.