Yokogawa DR240 - Manual (Page 265)

14-20 IM DR232-01E
14.5 Specifications of Strain Input Module
Model Code, Number of Input Channels, Terminal Configuration, Shortest
Measurement Interval and Values of Built-in Resistors
Model Code Number of Input Terminal Shortest Measurement Built-in
Channels Configuration Interval Resistor
DU500-12 10* Clamp 0.5 s 120 Ω
DU500-13 10* Clamp 0.5 s 350 Ω
DU500-14 10* NDI** 0.5 s External
*: Requires the space of two slots.
**: Recommended by the Japanese Nondestructive Inspection Association
Method of Input
Non-balanced floating input, with isolation between channels (separated channels)
Resolution of A/D Conversion
Equivalent to reading on 20000 full scale
Integral Time of A/D Conversion
Manual or automatic selection between 20 ms (50 Hz), 16.7 ms (60 Hz) and 100 ms (10 Hz)
(Except, auto switch does not function on the subunit (DS400/DS600) of a DC power supply
model. Selecting "AUTO" will set the A/D integration time to 20 ms (50 Hz).)
Types of Input
Signals from strain gauge or strain-gauge sensor
Connection Methods
Single-gauge, opposed-side two-gauge, adjacent-side two-gauge or four-gauge configuration
(Configured with built-in DIP switches for DU500-12 and DU500-13)
Applicable Gauge Resistance
100 to 1,000
Ω
The DU500-12 and DU500-13 modules contain 120- Ω and 350-Ω resistors, respectively.
Bridge Voltage
Fixed to 2 V DC (
±5% accuracy with a correction function)
Gauges
2.00 (with scaling capability)
Balancing
Automatic
Range of Balancing
Equivalent to ±10,000 µe (for single-gauge method)
Measuring Ranges and Accuracies
As described below, under the following operating conditions:
Ambient temperature: 23
±2°C; ambient humidity: 55 ±10% RH; power supply voltage: 90 to 250
VAC (AC power supply)/10 to 32 VDC (the subunit of a DC power supply model only); power
supply frequency: 50/60Hz within
±1% (AC power supply); warm-up time 30 minutes or more;
vibrations and others not affecting instrument operation.
Gauge Method Measuring Range Accuracy Resolution
Single-gauge –2000 to 2000 µε 0.5% of Range 0.1 µε
–20000 to 20000 µε 0.3% of Range µε
–200000 to 200000
µε
0.3% of Range 10
µε
Two-gauge –1000 to 1000 µε 0.5% of Range 0.1 µε
10000 to 10000
µε
0.3% of Range 1
µε
–100000 to 100000
µε
0.3% of Range 10
µε
Four-gauge –500 to 500 µε 0.5% of Range 0.1 µε
–5000 to 5000 µε 0.3% of Range 1 µε
–50000 to 50000 µε 0.3% of Range 10 µε
The Accuracies and Resolutions of the DU500-12 and DU500-13 models, do not include the influence of
the internal- and contact-resistance of the jumper setup switch.