9
8
Each meter is supplied complete with four
1.5V AA batteries. Remove the back cover,
unwrap the batteries and install them while
paying attention to the polarity (see "Battery
Replacement" section for details).
To prepare the instrument for use, connect
the DO probe to the meter by aligning the
pins with the socket located on the top of the
meter, pushing the plug in and tightening the
threaded ring. See the "Initial Probe Prepara-
tion" procedure explained on page 10.
To switch the meter on, press the ON/OFF
key and "Cond" appears on the display to
inform that the probe is in the auto-condition-
ing (polarization) mode. Once the "Cond" dis-
appears, the instrument can be calibrated.
If the probe is not connected, the meter will
display "°C ---.-", and print "---- ppm" & "----
°C" to alert the user.
This can also indicate a broken probe cable.
To save the battery life, the display is auto-
matically switched off after 4 hours of non-
use. However, the meter will continue to monitor
the dissolved oxygen and temperature (if in
recording/logging mode) .
ON/OFF
SPECIFICATIONS
Range
0.00 to 19.99 ppm (mg/L) O
2
0.0 to 50.0°C
Resolution
0.01 ppm (mg/L) O
2
0.1°C
Accuracy
±1.5% FS (O
2
)
±0.5°C
Typical EMC Deviation
±0.6 ppm (mg/L) O
2
/ ±3°C
Calibration
Automatic,
in saturated air, at 100%
Temperature Compensation
Automatic, 0 to 30°C (32 to 86°F)
Altitude Compensation
0 to 1900 m (resolution 100 m)
Salinity Compensation
0 to 40 g/L (resolution 1 g/L)
Probe
HI 76407/4, polarographic,
with 4 m (13') cable (included)
Printer
Low power impact type belt,
common 38 mm plain paper (HI 710034)
Printing / Logging (HI 91410 only) Interval
Selectable at
1, 2, 5, 10, 15, 30, 60, 120 or 180 min.
PC Connection (HI 91410 only)
RS232 port with HI 9200 transmitter
and HI 92000 software (not included)
Power Supply
4 x 1.5V AA batteries / approx. 70 hours of use;
auto-off after 4 hours of inactivity;
or 12 Vdc input
Environment
0 to 50°C (32 to 122°);
RH max 95%
Dimensions
220 x 82 x 66 mm
(8.7 x 3.2 x 2.6")
Weight
550 g (1.2 lb.)
INITIAL PREPARATION
°C
1 4 - 0 1 - 9 6
0 0 0 9 * 0 0 . 5 0
- - - - p p m
- - - - ° C
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