YOKOGAWA SC150, Инструкция по эксплуатации

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45
QIS 12D7B4-E-H
1st edition
Databankweg 20
3821 AL Amersfoort
The Netherlands
Quality
Inspection
Standard
YOKOGAWA
Model SC150
Conductivity and Resistivity
Converter
Introduction
The test equipment needed is :
BOX 1 Resistor decade to simulate the temperature sensor, maximum value
100 kW, adjustable in steps of 0.1 W, minimum accuracy 0.1 %.
BOX 2 Resistor decade to simulate the Conductivity sensor, maximum value
1 M
Ω
, adjustable in steps of 1 W, minimum accuracy 0.1 %.
2 fixed resistors To simulate the load resistance of the mA-output
value: 300ΩΩΩΩΩΩ, accuracy 1%.
Multimeter To measure DC currents up to 30 mA, minimum resolution 0.01 mA,
(preferably 2) minimum accuracy 0.05 % of reading.
To measure Contact Relays open or close.
Sensor cable type WU40 (2 metres) without sensor connection, to connect the input
signals
Connect the SC150 as shown in the figure below. The lower range decade box (BOX 1) to
terminals 11 & 12 to simulate the temperature input. Set decade box 1 to simulate 25 ºC,
see tables below for the value for the selected sensor. If this box has an earth connection,
connect it to terminal 12.
Connect the higher range decade box (BOX 2) to terminals 13, 14, 15 and 16, with 13/14
and 15/16 shorted at the decade box side. If this box has an earth connection, connect
this to terminal 14.
The output terminals are connected through the 300 W load resistor to the mA meter.
(Note: current outputs may be measured in turn with the same meter, or simultaneously if
two meters and load resistors are available).