YOKOGAWA EXA TB TB400G, User Manual

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<6. PROCEDURES FOR CONVERTER OPERATION>
6-10
IM 12E04A02-02E 9th Edition : Mar. 16, 2018-00
(2) Lamp voltage indication (FUNCTION "2")
The output voltage of the converter to the lamp (across terminals P1 and P2) is displayed.
(3) Turbidity element detection current (FUNCTION "3")
The signal detected by the turbidity detecting light-receiving element in the detector is displayed
as the current value (converted value).
(4) Reference element detection voltage (FUNCTION "4")
The signal detected by the light-receiving element for the amount of light from the lamp is
displayed as the voltage.
(5) Analog output in % (FUNCTION "5")
The current output signal is displayed in a % of the selected output range span.
(Example) In the case of output range: 0 to 2 mg/L, and
Turbidity indication: 1.20 mg/L
% Indication = × 100 = 60.0 %
1.20
2 – 0
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The analog output is sent out in the range of -10 to 110% of the output range span.
(6) Analog output in mA (FUNCTION "6")
The current analog output value is displayed in a value converted to mA. The value is directly
displayed for a 4 to 20 mA output, but for a 1 to 5 V output, it is displayed by converting it into a 4
to 20 mA output.
(7) Zero-point error (FUNCTION "7")
The measuring voltage signal for zero water or with the light source turned off at zero calibration
is displayed in a value converted to turbidity. If the measuring signal at zero calibration exceeds
the range of -10 to 10 mV, "Err21" is displayed.
(8) Slope (FUNCTION "8")
When the sensitivity at the reference sensitivity calibration is taken as 100%, this indication
displays the ratio as a percentage of the sensitivity obtained at usual span calibration to 100%. If
the sensitivity exceeds the range of 50 to 400% at span calibration, "Err22" is displayed.