User Guide

3
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it to make
sure that no damage has occurred during shipping. If there is any damage,
notify your Dealer.
Each HI2400 bench D.O. meter comes supplied complete with:
• HI 76407/2 D.O. probe with 2 m (6.7') cable
• HI 76407A membrane cap (2 pcs)
• HI 7041S electrolyte solution (30 ml)
• 12 VDC power adapter (HI 710005 or HI 710006)
Note: Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in the original
packing with the supplied accessories.
GENERAL DESCRIPTION
HI 2400 is a microprocessor-based, logging bench meter for
Dissolved Oxygen measurements.
It can store in memory up to 99 lots with up to 8000 readings. These readings
can be transferred to a computer system for elaboration or permanent storage.
Dissolved Oxygen is indicated in ppm (parts per million) or in %.
Temperature is compensated for by the meter’s ATC circuitry. Salinity compen-
sation in water allows direct determination of Dissolved Oxygen in saline
waters and the altitude compensation readjusts for the altitude variance.
The Dissolved Oxygen probe has a membrane covering the polarographic
sensors and a built-in thermistor for temperature measurements and compen-
sation.
This permeable Teflon
®
membrane isolates the sensor elements from the test-
ing solution, but allows Oxygen to pass through. When a voltage is applied
across the sensor, oxygen that has passed through the membrane reacts
causing a current flow, and hence determining a reading.
Teflon
®
is registered Trademark of “Du Pont de Nemours & Co.”
38
WARRANTY
All Hanna Instruments meters are warranted for two years against defects in
workmanship and materials when used for their intended purpose and main-
tained according to instructions. The electrodes and the probes are warranted
for a period of six months. This warranty is limited to repair or replacement free
of charge.
Damages due to accident, misuse, tampering or lack of prescribed mainte-
nance are not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of purchase,
serial number and the nature of the problem. If the repair is not covered by
the warranty, you will be notified of the charges to be incurred. If the
instrument is to be returned to Hanna Instruments, first obtain a Returned
Goods Authorization number from the Technical Service department and then
send it with shipping costs prepaid. When shipping any instrument, make
sure it is properly packaged for complete protection.
To validate your warranty, fill out and return the enclosed warranty card
within 14 days from the date of purchase.
Hanna Instruments reserves the right to modify the design, construc-
tion and appearance of its products without advance notice.