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WO81
24×48 type digital fine differential pressure sensor
• Product compliant with the UL standard and the EU directive RoHS WO71 •  Designed with consideration for ease of incorporation into the device, such as employment of RITS connector and snap-in type panel mounting method • The displacement sensor employs a high-performance diaphragm and a differential inductance method. FR51A MS99 •  Variation of fourteen ranges in total, including five zero center range types •  Easily visible 12 mm high red LED display •  Equipped with a variety of functions that include a movement average filter, MS99S maximum/minimum value memory, and comparison output Sign inversion function convenient for negative pressure measurement (negative . value indication is possible) MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A <Main application fields> • Semiconductor manufacturing equipment Negative pressure for dust
 collector/differential pressure of air conditioners Filter pressure loss management Precision machine manufacturing line General factory management equipment Acossones Application Precautions Maintenance <Usage> • Measurement of internal pressure of indoor device • Detection of clogging of air filter
 Measurement of clogging of bug filter Measurement of dynamic pressure at ventilation/exhaust device Room pressure measurement in a clean room *The wiring side connector and cable are not supplied. If they are necessary, use the RITS plug/connector 5P (refer to page 70).
◆When making an inquiry or placing an order, specify the above product code. *(Refer to pages 114 to 117)
List of WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Accessiries Application Precautions Maintenance
Conforming standards 1. EU directive This product is compliant with the EMC directive of EU. EMC directive basic requirements  Standard No. .... EN 61326–1 This product in combination with HWS15A-24/A (TDK-Lambda Corporation) is confirmed to be compliant with the EMC directive. When using this product with other power unit, have the final system go through the EMC test. 2. UL standard This product is certified as an UL standard recognition part. It is also certified with Canada Standard (C-UL). However, use this product in accordance with the installation conditions shown in (3) below. (1) Requirements standard No............. UL 61010–1 (2) File No. (3) Installation condition Code) Class 2 power source or LPS (Limited Power Source) power source.
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products WO81 External dimension drawing WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Acossonis Application Precautions Maintenance

Operation panel
Functions of EMD8AD>>>
▶Display function
●Pressure indication Easily visible 12 mm high seven-segment red LED display ●Push type automatic zero reset Zero-resets the pressure indication and analog output at the same time. ●Movement average filter (for indication use) When the measured pressure greatly fluctuates, this function increases the response time to alleviate the fluctuation of display value. ●Maximum value/minimum value memory function Memorizes and displays the maximum pressure and minimum pressure during measurement.
▶Comparison output function (NPN or PNP transistor
output)
●Equipped with two systems of the exact same function, each of which operates independently. (Transistor output and output monitor red LED are equipped for each system.) ●By changing the following parameter settings, it is possible to use this instrument for various applications. 1. Comparison mode (hysteresis mode or window mode) 2. Comparison pressure setting point 3. Output mode (OFF, N.O., N.C.) 4. Output on-delay time 5. Output off-delay time 6. Power supply on-delay time WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Accessines Under normal conditions, when the differential pressure being measured rises, the analog output value also rises. However, turning on the analog output inversion function makes an opposite action. ●Low power consumption function Reduces the power consumption by decreasing the LED display brightness. Application Precautions Maintenance ●Setting protection function Protects setting values in various setting modes from erroneous operation and others. ●Setting clear function This function can revert the setting values in all setting modes to the factory default state.
▶ Analog output function
●Analog output (4 to 20 mA or 1 to 5 V) This function performs zero setting and movement average filter processing of a digital pressure measurement value, and then performs D/A conversion of the value and outputs it as an analog value. ●Movement average filter (for output use) When the measured pressure greatly fluctuates, this function increases the response time to alleviate the fluctuation of analog output.
▶Other functions
●Test mode function It is possible to check the setting value and operation without applying pressure. ●Display low cut function When the measurement pressure is near zero, the pressure indication can be forcefully set to zero. ●Measurement indication symbol inversion function The indication values in the pressure indication mode and maximum/minimum indication mode are displayed with their symbols inverted. ●Analog output inversion function
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products WO81 Wiring Comparison output: NPN transistor type (when photocoupler is to be connected) WO71 FR51A MS99 MS99S MS61A-RA QDP33 Comparison output: PNP transistor type (when photocoupler is to be connected) EMD8A EMD7 EMT1 EMTGP1 EMT1H
Functional block diagram
EMT6 EMP5A EMRT1 HWS15A Acossones Application Precautions Maintenance
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products WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMIGP I EMTIH EMT6 EMP5A EMRT1 HWS15A Access(r)85 Apolication Precautions Vainterance
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products WO81 Comparison function operation diagrams WO71 FR51A MS99 MS99S MS61ARA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRI1 HWS15A t on-delay timer: Acossones Application Precautions Maintenance close (ON) when the pressure falls below P2. Power on-delay timer: During the operation of the timer, the comparison output will forcefully open (OFF). pressure area from Lo to Hi (window). When the output mode is set to N.C., the output will close (ON) when the applied pressure is within the range (window) and will open (OFF) when the pressure is out of the range. During the operation of the timer, the comparison output will forcefully open (OFF). Comparison output delay (On, Off, Power supply on) Power on-delay timer: when the applied pressure falls below the setting value P1, and vill close (ON) when the pressure exceeds P2. During the operation of the timer, the comparison output will forcefully open (OFF). Operation explanation: The comparison operation is performed in the range outside the set pressure area from Hi to Lo. When the output mode is set to N.C., the output will close (ON) when the applied pressure is out of the range and will open (OFF) when the pressure is within the range. Power on-delay timer: During the operation of the timer, the comparison output will forcefully open (OFF). Operation explanation: Power on-delay timer: : Regardless of the output mode setting (N.C., N.O.), the close and open (ON and OFF) timings of output transistor are delayed by the set delay time. During the operation of the timer, the comparison output will forcefully open (OFF).
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products EMD8A accessories RoHS This is a cable with connector used for connection with EMD8A. In the sheath cable and other constituting parts of this product, vinyl chloride is not intentionally used. RITS plugs and connectors are products of TE Connectivity.
Core wire sheath outer diameter: 1.0 mm Standard: AWG#24 This product is not UL-certified. Caution RITS plug/connector 5P  (TE Connectivity) This is a wiring side plug/connector used on EMD8A.
EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Accessines Application Precautions Maintenance Caution As the connector on the wiring side, be sure to use the RITS plug/connector from TE Connectivity. As the RITS connector is not compliant with e-CON, it is not compatible with connectors from other manufacturers. WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 Caution When crimping of the connector is performed, use the dedicated tool (item number: 1729940-1 from TE Connectivity). For other RITS connectors and details, contact TE Connectivity.
■Warranty period The warranty period for our product is one (1) year from delivery to the location specified by the orderer who makes a direct transaction with us.
■Scope of warranty
If any failure or defect attributable to us becomes clear during the above warranty period, we will repair the product or supply a substitute product free of charge. However, even during the warranty period, we will exclude the product from the scope of the warranty if the failure or defect corresponds to any of the following: (1) The failure or defect was caused by an unreasonable condition, environment, handling, or usage not mentioned in the instruction manual, specifications, and our product catalog. (2) The failure or defect was caused by a factor other than our product. (3) The failure or defect was caused by a modification or repair conducted by a party other than us. (4) The failure or defect was caused by an event that could not be foreseen at the scientific and technical levels at the time of product shipment from us. (5) The failure or defect was caused by an external factor not attributable to us, such as acts of God and disasters. Please note that the warranty mentioned here means the warranty for our individual product, and damage provoked by a failure or defect of the product is excluded from the scope of the warranty. *This warranty is valid only in Japan.
Application and usage
Our products are designed and manufactured as general-purpose instruments for general industries. Therefore, our products are not intended for the following uses, and our products used in such a manner are outside the scope of application. (1) Equipment that is anticipated to greatly affect lives and properties, such as nuclear power generation, aviation, railways, marine vessels, vehicles, and medical devices (2) Utilities that include electricity, gas, and service water (3)  Use in outdoor locations and under similar conditions or environments other than those stipulated in the instruction manual (4) Usage to which considerable safety consideration and attention equivalent to (1) and (2) above need to be given
Service
■Scope of service Because the product price does not include service expenses, such as the dispatch of engineers, we will separately charge for the expenses in the following cases: (1) Instruction for installation and adjustment and a witnessed test run (2) Maintenance inspection, adjustments, and repairs (3) Technical guidance and technical education (4) Witnessed inspections of products at our factory <<Note>>  The product specifications and information in this catalog are subject to change without prior notice for product improvement or other reasons. ●For order placement, contact Manufacturer 1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031 TEL. +81-78-631-6000 FAX. +81-78-631-6020