YOKOGAWA DR231 User Manual Download

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5-3

IM DR231-01E

Setting the Input Type/Recording Span/Linear Scaling

5.1 Setting the Type of Input and Recording Span

Selecting the Type of Input

The following types of input can be selected. The default setting is VOLT.
• SKIP

Measurement, recording and display (except for page display) will not be carried out.
Measurement, recording and display will be carried out for the next channel whose input type is
not set to SKIP.

• VOLT (DC voltage)

This input type can be selected from 20mV, 60mV, 200mV, 2V, 6V, 20V and 50V. Refer to
chapter 14 for the measurement range of each setting. The default setting is 2V.

• TC (thermocouple)

This input type can be selected from R, S, B, K, E, J, T, N, W, L, U and KP (KPvsAU7Fe).
Refer to chapter 14 for the measurement range of each setting. The default setting is R.

• RTD (resistance temperature detector)

This input type can be selected from PT1 (Pt100 1mA), PT2 (Pt100 2mA), JPT1 (JPt100 1mA),
JPT2 (JPt100 2mA), PT50 (Pt50 2mA), NI1 (Ni100 1mA SAMA), NI2 (Ni100 1mA DIN), NI3
(Ni120 1mA), CU1 (Cu10 GE), CU2 (Cu10 L&N), CU3 (Cu10 WEED), CU4 (Cu10
BAILEY), PT1S (Pt100 1mA high resolution), PT2S (Pt100 2mA high resolution), JPT1S
(JPt100 1mA high resolution), JPT2S (JPt100 2mA high resolution) and J263B (J263*B). Refer
to chapter 14 for the measurement range of each setting. The default setting is PT1.

• DI (voltage level: LEVL; contact:CONT)

This input type can be selected from LEVL and CONT.
In case of LEVL, a voltage of less than approx. 2.4 V will be recognized as “0 (OFF)”, whereas
a voltage of approx. 2.4V or more (max. allowable voltage is up to

60 VDC) will be

recognized as “1 (ON)”.
In case of CONT, an open, externally connected contact to which no voltage is applied, will be
recognized as “0 (OFF)”, whereas a closed contact will be recognized as “1 (ON)”.
The default setting is LEVL.

• DELTA (difference between channels)

Destination channels should lie within the first channel No. to the last channel No. range. The
number of the reference channel should be lower than the number of the distination channels.
The default setting for the reference channel is 01. The type of input and the measuring range
in the distination channel are the same as for the reference channel. After setting the DELTA
(difference between channels), if you attempted to change the rype of input and the measuring
range, setting the difference between channels is released, thereby the type of input and the
measuring range in the destination channel are returned to their original settings, and the
recording span is returned to its initial value.

• RRJC (Remote RJC, available if the instrument is equipped with the optional MATH function)

Reference channel (RJC): Within the setting range of reference channel No.
TC (thermocouple) must be selected as the type of input to the reference channel.
If the channel No. or type of input for the reference channel, or the type of thermocouple is
changed, the alarm and partial compression recording functions will be turned OFF.
If the type of input for the reference channel or the type of thermocouple is changed, the RRJC
settings will be cleared and the type of input and measuring range for the reference channel will
be set to the one which was in effect before the change was made. The recording span will be
set to the initial value of the measuring range.

Setting the Recording Span

The measurement range is decided according to the type of input. The recording left and right
span must lie within the measurement range. However, the recording span is 0 to 1 for the DI
input type. The value on the left side of the SPAN menu shows the left span, and the value on the
right side of the SPAN menu shows the right span.
For the remote RJC, the setting range for recording span is the same as that for the reference
channel.