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MURPHY SHD-30 and SHD30-45 Digital Tachometers Hourmeter
SHD30 and SHD30-45 Models Digital Tach/Hourmeter w/Adjustable Overspeed Trip Point
SHD-30和SHD30-45数字式转速表和计时器

MURPHY SHD30和SHD30-45是基于微处理器的转速计,带有计时器和超速跳闸点。跳闸点可以连接为C型继电器输出或常开可控硅输出,用于超速报警或停机。MURPHY SHD30 and SHD30-45 are microprocessor-based tachometers with hourmeter and an overspeed trip point. The trip point can be connected as either a form C relay output or as a normally open SCR output for alarm or shutdown on overspeed.

SHD30采用面板安装设计,塑料外壳长5-1/16(129毫米),4-1/4英寸。(108毫米)高。SHD30-45有相同的外壳,但它也有一个带螺柱的背板,可以像OPLFC一样安装。SHD30型号的电源和转速数据由磁性拾波器或电容放电(CD)点火装置提供。计时器可调至预设时间并可重置为零。如果断电,车载电池将保持运行时间显示,并允许重置超速继电器输出。当存在转速信号时,SHD30型号显示转速。当转速表信号不存在时,除非按住面板上的读取小时膜键,否则显示为空白。五位数液晶显示屏每秒更新一次。通过操纵薄膜开关,可以显示发动机每转的运行小时数、超速设定点和电流脉冲。即使断电,也可以显示运行时间。运行小时显示可配置为与RPM显示交替。

SHD30,SHD30-45 Digital Tachometer and Hourmeter with Adjustable Overspeed Trip Point
数字式速度表及小时表,带可调超速开关点


The SHD30 features a panel-mounting design, plastic enclosure that is 5-1/16 (129 mm) long and 4-1/4 in. (108 mm) high.The SHD30-45 has the same enclosure, but it also has a backplate with studs to mount like an OPLFC.The SHD30 models power and RPM data are supplied by either a magnetic pickup or a capacitor discharge (CD) ignition. The hourmeter is adjustable to a preset time and resettable to zero. Should power be lost, on-board batteries maintain the run hours display and allow for resetting the overspeed relay output.When a tach signal is present the SHD30 models display RPM. When a tach signal is not present, the display is blank unless the Read Hours membrane key on the faceplate is pressed and held.The five-digit, liquid crystal display is updated every second. The run hours, overspeed set point and current pulses per engine revolution can be displayed by manipulating the membrane switches. Run hours can be displayed even after power is lost. The run hours display can be configured to alternate with the RPM display.

Ease of Calibration
易于校准

SHD30模型校准是通过使用面板上的每转脉冲数和超速设定值膜键输入发动机每转脉冲数来完成的。脉冲数由气缸数、循环数和点火特性决定。它还取决于电磁拾波系统上发动机飞轮的齿圈齿数。预设和重置运行时间是从后面和前面的SHD30模型。The SHD30 models calibration is accomplished by entering the number of pulses per engine revolution using the Pulses per Revolution and Overspeed Set point membrane keys on the faceplate. The number of pulses is determined by the number of cylinders, cycles and ignition features. It is also determined by the number of ring gear teeth of the engine’s flywheel on a magnetic pickup system. Presetting and resetting running hours is done from the back and front of the SHD30 models.

 

Features:

Normally open and normally closed overspeed alarm or shutdown switch (standard)
RPM data and power supplied by magnetic pickup or capacitor discharge (cd) ignition
accurate to ±0.5% of display reading
hours can be preset and reset to zero
Approved for Class I, Division 2,Groups C & D hazardous areas

 

Specifications:

Power input:
CD ignition:
90 to 350 VDC
150 μA typical @ 90 VDC
300 μA @ 350 VDC
Magnetic Pickup:
5 to 120 Vrms
325 μA typical @ 5 Vrms, 100 Hz
450 μA typical @ 5 Vrms, 1 kHz
1 mA typical @ 5 Vrms, 5 kHz
2 mA typical @ 5 Vrms, 10 kHz
15 mW max. @ 5 Vrms, 10 kHz
2.8 W max. @ 120 Vrms, 10 kHz
Backup Batteries: 2 replaceable, long-life Lithium batteries, Panasonic
CR2032 or equivalent, 3 V, 220 mAh power. Shelf life expectancy 10
years
Operating Temperature: -4° to 158°F (-20° to 70°C)
Storage Temperature: -40° to 300°F (-40° to 150°C)
Case Material: Plastic
Ignition Frequency Range: 3 to 666 Hz
Magnetic Pickup Frequency Range: 1 to 10 kHz
Overspeed Output:
Connected to S.C.R. (Silicon Controlled Rectifier) terminals:
0.5 A, 350 VDC continuous
Connected to Form C Relay terminals:
Relay Contact, 0.5 A, 30 VDC, 125 VAC resistive
Tachometer Accuracy: ±0.5% of the display reading or ±1 RPM whichever
is greater
Hourmeter Range: 0 to 65535 hrs
Hourmeter Accuracy: ±15 minutes per year
Laboratory Approvals: CSA (Canadian Standards Association) approved for Class I, Division 2, Groups C & D hazardous areas
Shipping Weight: 1 lb (0.5 kg)
Shipping Dimensions: 9-1/4 x 8-1/4 x 5-1/4 in. (235 x 210 x 133 mm)

 

Applications

- Gas Compressors
- Oil Field Equipment
- Industrial Engines
- Generators

 

Downloads

 

- How to Order

Part Number Model and Description Notes
Specify Model Number SHD30 Tach/Hourmeter with Overspeed  
SHD30-45 Tach/Hourmeter with Overspeed to mount like SHD45 or OPLFC  
00009389 Panasonic CR2032 or equivalent backup battery (2 required)  

 

 

 


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