User Guide

8
LCD FUNCTIONAL DESCRIPTION
OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 VDC adapter into the meter.
HI 2400 uses an EEPROM to retain the D.O. calibration and temperature
calibration as well as the serial communication setting. The instrument will
store the respective data after a calibration or serial communication setting,
even when it is not pluggedin.
PRIMARY DISPLAY
SECONDARY DISPLAY
Environment 0 to 50ºC (32 to 122ºF);
95% RH
Dimensions 240x182x74 mm
(9.4x7.1x2.9")
Weight 1.2 kg (2.7 lb.)
Response time The response time is approximately 20 seconds for a
95% reading at a constant temperature of 25ºC.
The response time for low oxygen readings or at low temperature is
approximately 40 seconds. Allow more time to obtain more accurate
readings.l
33
Commands requiring an answer:
DO? Causes the meter to send the D.O. (% or ppm will depend on the
meter setting). If the reading is out of range “Err 1” is sent.
TM? Causes the meter to send the temperature value. If the reading
is out of range “Err 3” is sent.
DA? Requests the meter to send the date
E.g. “022896” for 28th Feb. 96
TI? Requests the meter to send the time.
E.g.
“233001” for 23:30 hr, 1 sec. as interval
“233002” for 23:30 hr, 15 sec. as interval
“233003” for 23:30 hr, 30 sec. as interval
“233004” for 23:30 hr, 1 min. as interval
“233005” for 23:30 hr, 5 min. as interval
“233006” for 23:30 hr, 30 min. as interval
“233007” for 23:30 hr, 60 min. as interval
“233008” for 23:30 hr, 120 min. as interval
“233009” for 23:30 hr, 180 min. as interval
?ML Requests the meter to send the available lot number collected in
memory. The transmission begins with <STX> and terminates
with <ETX>. The data are sent in the following order:
1) stx
2) Lot number
E.g. “01” for lot No. 1
3) Total number of samples per lot
E.g. “1234” for total no. of samples: 1234.
4) Channel #1 status
E.g. “1” for ppm logging selected in this lot
“0” for ppm logging not selected in this lot
5) Channel #2 status
E.g. “1” for % logging selected in this lot
“0” for % logging not selected in this lot
6) Channel #3 status
E.g. “1” for not used “0” for not used
7) Channel #4 status
E.g. “1” for temperature logging selected in this lot
“0” for temperature logging not selected in this lot