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output matching a different EC or TDS range, for example,
4 mA = 30 mS and 20 mA = 50 mS.
To change the default values, the setup mode must be en-
tered. Setup codes for changing the analog output minimum
and maximum are 41 or 42, respectively. For the exact pro-
cedure, refer to the setup mode section in the manual.
Note The analog output is factory calibrated through software. The
user may also perform the calibration procedure as explained
in the following. It is recommended to perform the output
calibration at least once a year.
Note Analog output resolution is 1.5‰ f.s. with 0.5% f.s. accu-
racy.
Note The analog output is “frozen” when entering the setup or
calibration mode (after password confirmation).
CALIBRATION
The controller is factory calibrated for temperature as well as
for the analog input and outputs.
The user should periodically calibrate the instrument for EC
or TDS. For greatest accuracy, it is recommended that the
instrument is calibrated frequently.
Before beginning normal operation,it is recommended to stan-
dardize the probe with the Hanna calibration solution close
to the expected sample value and inside the selected range.
EC AND TDS CALIBRATION
The calibration points for EC and TDS are as follows:
Range Calibration point(s)
0.0÷199.9 µS 84.0 µS
0÷1999 µS 1413 µS
0.00÷19.99 mS 5.00 - 12.88 mS
0.0÷199.9 mS 80.0 - 111.8 mS
0.0÷100.0 ppm 42.0 ppm
0÷1000 ppm 800 ppm
0.00÷10.00 ppt 6.44 ppt
0.0÷100.0 ppt 55.9 ppt
