SI value, the so called “velocity response spectrum”, is one of the standards to express an earthquake’s destructive power against structures. SW-74SI is an advanced model equipped with alarm output to 10-step and SI value output.
Block Diagram
Features
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[Fine Visual Display]
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[Touch panel type]
Direct operation makes speedy conrirm.
-
[Easy fixing]
U-shaped fixing hole makes easy
anchor positioning for seismic
pickup and fixing. -
[System Calibration Service]
Calibration system is composed of a compact electrodynamic horizontal table PET-03 and an amplifier with oscillator PET-OA. It can simulate earthquake and enables an easy calibration test.
-
[Compact design]
By locating pick-up port at a lower place and rounding off the corners, we are able avoid impact to cables from outside.
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[Water-proof type]
IP67 water proof compliant structure enables installation at
rainy or dusty places. -
[History Report Screen]
History up to 50 are saved.
-
[Safety and high accuracy]
This is the most advanced of all
electrical type. Servo sensors can
detect acceleration fromO Hz.
Three units of the servo type
sensors are equipped in a
seismometer to detect
accelerations in 3-axis.
- Hazardous material isolation
-
System Comp0sition
Outward Drawing
What is “SI value”?
SI value, the so called “velocity response spectrum”, is one of the standards to express an earthquake’s destructive power against structures. Power plants or gas facilities are currently widely using this standard.
Earthquake damage on buildings may differ based on frequency range, or time, and can not be forecast based only on seismic intensity scale or acceleration.
Specifications
Processing Unit（SW-74SI）
| MODEL | SW-74SI |
|---|---|
| Display Element | STN monochrome LCD with touch switch (back light color: Green/Orange/Red) (Replacement unnecessary) |
| Display Contents | Indicated content switching (Acceleration + Seismic intensity scale/Instrumental seismic intensity/SI value by internal setting) |
| Earthquake monitor screen | Present time |
| Earthquake generation screen | Earthquake generation time Maximum value |
| Alarm hold screen | Reset button (Whole reset of alarm/buzzer) |
| Each setting screen | Trigger, Alarm, Date/time |
| Maintenance screen | Pickup test, Earthquake history |
| Extra Alarm | Alarm step : Upper 7-step (ALM4-10) Individual setting (Acceleration / Instrumental seismic intensity/ SI value. Any setting is possible) Alarm setting value : 0.1-999.9 (Gal/Instrumental seismic intensity/Kine) (0.1 step, 0.0 is alarm operation OFF) (Seismic intensity scale alarm is set by Instrumental seismic intensity value) Alarm contact : 1a contact (photo MOS relay) Independent COM 2-point (ALM 1-5, ALM6-10, each 1-point) Contact rating : 200V-0.65A (AC/DC common, peak value) |
| Alatm & Buzzer | Upper 3-step (ALM1-3) Individual setting, buzzer 1-point Alarm setting value : 0.1-999.9 (Gal/Instrumental seismic intensity/Kine) 0.1 step, 0.0 is buzzer operation OFF (Seismic intensity scale alarm is set by instrumental seismic intensity.) |
| Alarm & Buzzer Reset Method |
a. External reset terminal (All step reset by no-voltage a contact) b. Automatic reset by built-in time c. Reset button the touch panel (Available on the alarm hold screen) 1-9999sec, (Setting interval: 1-sec, 0 is automatic reset OFF) |
| Fault Alarm | [Power failure/System abnormal] 1a/1b contact switching type Contact rating: 2A 30VDC (Max. allowance voltage/current : 220VDC/2A) |
| Serial Output | For maintenance (conforms to RS232C) : MC1 (Switching type with screen control) For external display (conforms to RS422) : MC2 |
| Back-up Unit | Backup time ≧10min (ready time), Charging time ≦48hrs (No function at the operation by optional power 24VDC) |
| Mounting Method | Wall type |
| Ambient Temperature | 0～+50℃ |
| Humidity Range | 10～85％RH |
| Power Supply | 100VAC±10％, ≦100VA 24VDC±10％, ≦70W(option) |
| Outer Dimensions | See the outside view |
| Painted Color | Panel: Similar to Munsell 5GY8/0.5 Case: Munsell N6.0 |
| Weight | 3kg approx. |
Option
Options to expand the function are provided.
- Indicates Acceleration value, Seismic intensity scale and Alarm generation time.
“Color display in standard unit is a touch-panel display.
This optional external display is only an indicator without touch-panel function. - Takes out the alarm when 2-sets among 3-sets operate.
It increases the reliability of control ･ cut-off alarm contact output for seismic monitor.
