THAILAND

Features

• ■ Reliable accuracy

  Built - in servo type accelerometer is also used for detection of micro-tremor. Both indication setting and alarm setting is 1 gal step.

• ■ Waterproof structure

  It is ideal to install the seismometer on the common foundation to catch the motion of earthquake correctly. SW-52EX / 52ST adopts IP67 waterproof structure which is able to be installed outside or dusty environments.

• ■ Available to large-scale earthquake monitoring

  The peak of motion in any direction can be surely captured by vector composition of the accelerations detected by the accelerometers arranged in three directions. The measurable acceleration range up to 5000 gal prepare against the large-scale earthquake.
  

• ■ Flame-proof structure
  * Only SW-52EX

  The container is constructed to withstand the pressure when explosive gas explosion occurs and not to catch fire.

• ■ Standard communication method

  RS-485(ModBus)is adopted.

System composition

Flame-proof / dust-ignition-proof specification

Certification		Ex db IIB+H2 T6 Gb (IECEx, ATEX), Ex d IIB+H2 T6 Gb (TIIS) Ex tb IIIC T120℃ Db (IECEx, ATEX,TIIS)
Certification No.		IECEx DEK 16.0004X DEKRA 16ATEX0005 X TIIS TC22341X
Compliance standard	IECEx	IEC 60079-0:2011 IEC 60079-1:2014-06 IEC 60079-31:2013
	ATEX	EN 60079-0:2012+A11 EN 60079-1:2014 EN 60079-31:2014
	TIIS	Explosion-protected electrical installations in general industries JNIOSH-TR-46-1:2015 JNIOSH-TR-46-2:2015 JNIOSH-TR-46-9:2015

Classification of explosive gas

	450°C≧ T1 >300°C	300°C≧ T2 >200°C	200°C≧ T3 >135°C	135°C≧ T4 >100°C	100°C≧ T5 >85°C	85°C ≧ T6
ⅡＡ	NH3, CO, C2H6, C7H8, C3H8, CH4	C2H6O, C4H10O, C4H10, C5H8O2, (C2H3Cl)n	C6H14, gasoline, Kerosene, C5H12	C2H4O, C3H9N		Ethyl nitrite
ⅡB	HCN, C3H3N, Coal gas	C4H4O, Ethyl acrylate, C2H4	C2H6O, C6H12, C5H8
ⅡC	H2	C2H2			CS2	C2H5NO3

Main explosive gas targeted by this product

Classification of explosive dust (GroupⅢ)

	Type of dust	Electric resistance	Representative materials
ⅢA	Combustible flyers Size > 500 μm	―	Textiles such as rayon, cotton, sisal hemp, jute
ⅢB	Non-conductive dust Size ≦ 500 μm	Electric resistance > 103Ωm	Powder such as cereal flour, sugar, toner, synthetic resin powder
ⅢC	Conductive dust Size ≦ 500 μm	Electric resistance ≦ 103Ωm	Metal powders such as carbon black, aluminum, magnesium

Specifications

• 

  SW-52EX Instruction manual

• 

  SW-52ST Instruction manual

Item	Specification
Detection method	All-directional detection based on vector composition acceleration
Built-in pickup	Force-balancing servo acceleration pickup
Frequency range	0.3 to 10 Hz ±10 %
Acceleration measurement	Maximum range	0 to 5000 Gal (composite value of 3-component vector) NS and EW axes : ±3000 Gal / UD axes : +2000 to -3000 Gal
	Frequency range	0.3 to 10 Hz ±10 %
SI value measurement	Maximum range	0 to 5000 Gal (composite value of 3-component vector) Cycle : 2 seconds, 5000 Gal, Damping : 2%)
	Cycle range	0.1 to 2.5 seconds Real-time calculation of speed response spectrum at measuring acceleration through twenty-five simulation filters with 1-degree of freedom, Inherent cycle : 0.1 sec. step
	Damping	2 to 30 % (Arbitrary setting in 1 % step)
Low pass filter	30 Hz (-3 dB), 4th butterworth
A / D converter	24 bit, 100 Hz sampling
Seismic intensity scale calculation method	Modified Mercalli intensity scale (PGA estimated value)
Analog output	4 to 20 mA DC x 2 pcs (Load resistance : 300 Ω or less) Selection of “Acceleration”, “SI” or “MMI scale” for each output
	MMI scale : Full-scale is fixed, 10-level output in 1.6 mA step
Relay output	1a contact (Photo-MOS relay) Contact rating : 40 V, 0.8 A (For AC and DC, peak value) Output content : “Seismic alarm” or “FAULT alarm” can be selected
Digital output	Open-collector output × 3 pcs. (D-GND is common) Output rating : 30 V, 50 mA Output content : “Seismic alarm” or “FAULT alarm” can be selected.
Alarm	Seismic alarm	Alarm is output when the system detects earthquake and the measured value exceeds a preset level. Upper limits of 4 levels (Digital output 1 to 3, Relay output) can be individually specified. Output factor : “Acceleration” or “SI value” can be selected Output level : 0.1 to 999.9 (Gal / Kine) 0.1 step, 0.0: Alarm is OFF Reset time: 1 to 9999 seconds, 1-sec. step 0 sec. : Auto-reset is disabled
	FAULT alarm	The alarm is output at detection of any of the following errors “Hardware self-diagnosis”, “Pickup self-diagnosis”, “Pickup test” or “System power failure”
Seismic alarm reset	Internal timer or digital input (Digital input setting is required)
Digital input	Open-collector or non-voltage contact input x 1 pcs. (D-GND is common.) Open voltage : Approx. 13 V (ViH: 2.4 V or more, ViL: 0.8 V or less) Input pulse width : 0.1 sec. or more Function can be changed depending on communication setting: [Seismic alarm reset / Time correction / Pickup test execution]
Serial I/F	Communication with host : Measurement data collection, system setting change, status monitoring, pickup test execution, digital input function changeover Interface : RS-485 (2-wire type half-duplex communication) Communication speed : 115,200 bps Protocol : Modbus (RTU mode)
Clock	Accuracy	20 ppm (monthly error: 50 seconds) or less
	Calibration	±30 sec. correction using digital input (Digital input setting is required)
Operational temperature range	0 to + 50 ℃
Operating humidity range	10 to 100 %RH (non-condensing)
Power supply	DC 24V ±10 % 10 W or less
Structure	Aluminum
Installation method	Installation on the ground (fixed by anchor)
Construction	SW-52EX	Ex db IIB+H2 T6 Gb (IECEx, ATEX), Ex d IIB+H2 T6 Gb (TIIS) Ex tb IIIC T120℃ Db (IECEx, ATEX,TIIS)	SW-52ST	IP67 (Dustproof, watertight structure)
Mass		Approx. 5 kg		Approx. 2 kg
I/O cable		Cable ground (Internal terminal block connection)		Connection with waterproof connector