A&D RA3100 Omniace, Instruction Manual

Page: 129 / 176

10. 10Appendix - 10.2. Relationship between Sampling Speed and Chart Speed in Pen Recording
1WMPD4004444 129
10.2. Relationship between Sampling Speed and Chart Speed
in Pen Recording
The relationship between sampling speed and chart speed in pen recording is indicated in the table below.
Sampling speed Chart speed
100 ms/div (1 kS/s) 100 mm/s
200 ms/div (500 S/s) 50 mm/s
500 ms/div (200 S/s) 20 mm/s
1 s/div (100 S/s) 10 mm/s
2 s/div (50 S/s) 5 mm/s
5 s/div (20 S/s) 2 mm/s
10 s/div (10 S/s) 1 mm/s
20 s/div (5 S/s) 30 mm/min
50 s/div (2 S/s) 12 mm/min
100 s/div (1 S/s) 6 mm/min
2 min/div (50 S/min) 5 mm/min
5 min/div (20 S/min) 2 mm/min
10 min/div (10 S/min) 1 mm/min
10.3. Scale Conversion (Physical Quantity Conversion)
The scale conversion function converts the voltage values output from a sensor, etc. to a physical
quantity for direct reading.
This product has two conversion methods. Both methods perform the same conversion, as indicated in the figure.
Method 1 Direct conversion with two point values
The Y = AX + B formula is derived by specifying the input and output values a [Xa, Ya] and b
[Xb, Yb] of the two points a and b.
Method 2 Conversion with gain compensation when conversion between physical quantity and sensor
output voltage is defined
Gain A and offset B of the sensor input are defined and the formula Y = AX + B is derived.
Physical quantity
Yb b
Ya a
Gain A
Offset B
0 Xa Xb Input voltage
Example-1 2-pt gain
4-20mA transmission When the sensor side output 4-20mA (1 - 5 V) is 0 - 10 kg
Two point method Conversion 1: 1 → 0; Conversion 2: 5 → 10 (unit: kg)
Example-2 Gain compensation
Vibration sensor Sensitivity 4.5 N = 1 V
Sensor type Gain: 4.5; Offset: 0 (unit: N)