HS-256使用说明书1

6900系列多路H256高清解码器说明书
6900系列多路H256高清解码器是一款高质量的多路高清解码器。

该设备使用先进的数字信号处理技术，能够支持多种高清视频格式，如H.264、MPEG-4、AVI和WMV等等，并且具有多种视频输出接口，如HDMI、VGA和DVI等等。

该设备支持多种视频输入接口，包括HDMI、DVI、VGA和CVBS等等，可以满足不同的视频输入需求。

同时，还具有多种音频输入接口，如RCA、XLR和TRS等等，能够支持不同的音频输入源。

除此之外，该设备还具有强大的多路解码功能。

它可以同时解码多路高清视频，实现视频画面的多路浏览和分屏显示。

同时，还支持多种解码方式和解码码率，可以满足不同的视频解码需求。

该设备的高清输出接口支持HDMI、VGA和DVI等等，能够满足不同的高清输出需求。

同时，还支持多种音频输出接口，如RCA和XLR等等，可以输出高质量的音频信号。

该设备的操作界面简洁易懂，操作方便。

它采用了智能化的控制技术，可以实现多种控制方式，如按钮、遥控器和网络控制等等。

通过网络控制，用户可以远程控制设备，实现实时监控和远程控制的功能。

总之，6900系列多路H256高清解码器是一款功能强大、性能稳定、操作简便的高清解码器。

它能够满足不同的视频输入和输出需求，并且具有强大的多路解码功能。

同时，它还支持多种控制方式，方便用户的使用。

jwt校验写法-回复JWT（JSON Web Token）是一种用于身份验证和授权的开放标准。

在网络应用程序中，JWT是一种无状态的认证方式，即服务器不会在本地存储任何用户信息，而是通过使用密钥签发和验证令牌来进行身份验证。

在本文中，我们将一步一步回答如何进行JWT校验的写法。

第一步：理解JWT的结构JWT由三个部分组成：头部（Header）、负载（Payload）和签名（Signature）。

这三部分使用点号（.）分隔开，并编码为Base64字符串。

头部：包含了令牌的类型和算法，通常为`{"alg": "HS256", "typ": "JWT"}`。

其中，alg表示签名所使用的算法，typ表示令牌的类型。

负载：包含了令牌的声明信息，比如用户ID、角色等。

可以自定义其他需要的字段。

负载可以被任何人解读，但不能被篡改。

一个示例的负载可能是`{"userId": "123456", "role": "admin"}`。

签名：由头部、负载和密钥组成，用于验证JWT的完整性。

签名的生成需要使用头部和负载进行编码后的字符串，结合密钥，通过指定的算法生成。

在校验时，服务器会使用相同的密钥和算法重新生成签名，然后与接收到的签名进行对比，以确保JWT的完整性。

第二步：验证JWT的有效性1. 获取待验证的JWT：将从请求中获取到的JWT保存至某个变量中。

2. 拆分JWT：使用点号（.）将JWT拆分为头部、负载和签名。

3. 校验头部：首先，校验头部的类型和算法是否符合预期。

通常情况下，算法应为HS256，类型应为JWT。

如果不符合预期，则认为JWT无效。

4. 解码负载：使用Base64解码负载部分，得到JSON格式的负载。

5. 验证负载：根据应用程序的需求，验证负载中是否包含了必要的声明信息，如用户ID、角色等。

无锡信捷电气股份有限公司资料编号PD07 20210112 3.5信捷电气基于以太网的TCPIP通讯用户手册第一版目录———————————————————————以太网通讯概述———————————————————————以太网参数的配置———————————————————————接线方式及通讯协议———————————————————————以太网通讯指令———————————————————————1234基本说明♦感谢您购买了信捷以太网型可编程序控制器。

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网络硬盘录像机使用说明书V2.7.2前言概述本文档详细描述了NVR（Network Video Recorder）设备的安装、使用方法和界面操作等。

适用型号：型号系列具体型号NVR1系列NVR104、NVR104-P、NVR108、NVR108-P、NVR1104、NVR1104-P、NVR1108、NVR1108-P、NVR1104H、NVR1104H-P、NVR1108H、NVR1108H-P、NVR1104HS、NVR1108HSNVR2系列NVR2104HS-S1、NVR2108HS-S1、NVR2116HS-S1、NVR2104HS-P-S1、NVR2108HS-8P-S1、NVR2204-S1、NVR2208-S1、NVR2216-S1、NVR2204-P-S1、NVR2208-8P-S1NVR4系列NVR4104H、NVR4104H-P、NVR4108H、NVR4108H-P、NVR4116H、NVR4116H-P、NVR4104H-W、NVR4104H-4G、NVR4108H-4G、NVR4104、NVR4108、NVR4116、NVR4104-P、NVR4108-P、NVR4116-P、NVR4204、NVR4204-P、NVR4208、NVR4208-8P、NVR4208-P、NVR4216、NVR4216-8P、NVR4216-P、NVR4232、NVR4208-4K、NVR4216-4K、NVR4216-16P、NVR4232-16P、NVR4232-4K、NVR4408、NVR4408-8P、NVR4416、NVR4432、NVR4408-4K、NVR4416-4K、NVR4432-4K、NVR4416-16P、NVR4808、NVR4816、NVR4832、NVR4808-4K、NVR4816-4K、NVR4832-4K、NVR4104HS-HDS2、NVR4108HS-HDS2、NVR4116HS-HDS2、NVR4104HS-P-HDS2、NVR4108HS-8P-HDS2、NVR4104HS-4KS2、NVR4108HS-4KS2、NVR4116HS-4KS2、NVR4104HS-P-4KS2、NVR4108HS-8P-4KS2、NVR4208-HDS2、NVR4216-HDS2、NVR4232-HDS2、NVR4208-8P-HDS2、NVR4216-16P-HDS2、NVR4208-4KS2、NVR4208-8P-4KS2、NVR4216-4KS2、NVR4216-16P-4KS2、NVR4232-4KS2、NVR4408-HDS2、NVR4416-HDS2、NVR4432-HDS2、NVR4416-16P-4KS2、NVR4416-16P-HDS2、NVR4408-4KS2、NVR4416-4KS2、NVR4432-4KS2、NVR4808-HDS2、NVR4816-HDS2、NVR4832-HDS2、NVR4808-4KS2、NVR4816-4KS2、NVR4832-4KS2NVR5系列NVR5808-4K、NVR5816-4K、NVR5832-4K、NVR5864-4K、NVR5064-4K、NVR5032-4K、NVR5016-4K、NVR5408-4K、NVR5416-4K、NVR5432-4K、NVR5464-4K、NVR5208-4K、NVR5216-4K、NVR5232-4K、NVR5264-4K、NVR5016FG-4K、NVR5032FG-4K、NVR5064FG-4KNVR7系列NVR7032、NVR7032-R、NVR7064、NVR7064-R、NVR7808、NVR7816、NVR7832、NVR7864、NVR7816-16P、NVR7832-16P、NVR7864-16P、NVR7816-RH、NVR7832-RH、NVR7864-RH、NVR7408、NVR7416、NVR7432、NVR7464、NVR7208、NVR7208-8P、NVR7216、NVR7216-8P、NVR7232、NVR7232-8PNVR8系列NVR808-8-HD、NVR808-16-HD、NVR808-32-HD、NVR816-32-HD、NVR816-64-HD 符号约定在本文中可能出现下列标志，它们所代表的含义如下：图标说明危险表示有高度潜在危险，如果不能避免，会导致人员伤亡或严重伤害。

DS-2XE68x5G0-IZHSHigh Resolution Explosion-Proof Network Bullet Camera Series● 2 MP or 8 MP High Resolution Options ● 2.8 mm to 12 mm or 8 mm to 32 mm Lens Option ● 120 dB Wide Dynamic Range ● H.265, H.265+, H.264, H.264+ ● On-Board Storage up to 256 GB● ATEX: Ex II 2 G D Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68 ● IECEx: Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68 ● UL(Zone): Class I, Zone 1, AEx db IIC T6 Zone 21, AEx tb IIIC T80°C ● cUL(Zone): Ex db IIC T6 Gb X Ex tb IIIC T80°C Db X ● UL/cUL (Division): Class I, Division 2, Groups A,B,C and D,T6; Class II, Division 2, Groups F and G,T80°CHikvision’s DS-2XE68x5G0-IZHS Explosion-ProofNetwork Bullet Camera Series feature 2 MP or8 MP resolution and 2.8 mm to 12 mm or 8 mm to32 mm Lens options. On-board storage of up to256 GB via a microSD card offers addedfunctionality. H.265, H.265+, H.264, and H.264+video compression options saves storage space and bandwidth.Available ModelsDS-2XE6825G0-IZHS (2.8 mm to 12 mm): 2 MP DS-2XE6825G0-IZHS (8 mm to 32 mm): 2 MP DS-2XE6885G0-IZHS (2.8 mm to 12 mm): 8 MP DS-2XE6885G0-IZHS (8 mm to 32 mm): 8 MPSpecificationsDS-2XE6825G0-IZHSDS-2XE6885G0-IZHSCamera Image Sensor1/2.8" progressive scan CMOS 1/2" progressive scan CMOS Minimum Illumination 2.8 to 12 mm Color: 0.012 lux @ (ƒ/1.4, AGC on), B/W: 0.0012 lux @ (ƒ/1.4, AGC on), 0 lux with IR 8 to 32 mmColor: 0.018 lux @ (ƒ/1.7, AGC on), B/W: 0.0018 lux @ (ƒ/1.7, AGC on), 0 lux with IR Shutter Speed 1s to 1/100,000 s Slow Shutter YesDay/NightIR cut filter WDR 120 dBLens Lens Type Varifocal lens, 2.8 mm to 12 mm or 8 mm to 32 mm lens Auto-IrisDC drive Aperture2.8 mm to 12 mmƒ/1.4ƒ/1.7, constant ƒ/1.7 throughout the zoom range 8 mm to 32 mmFocusAuto, semi-auto, manualFOV2.8 mm to 12 mm Horizontal FOV 115° to 42°, vertical FOV 59° to 24°, diagonal FOV 141° to 48° Horizontal FOV 112° to 41°, vertical FOV 58° to 23°,diagonal FOV 137° to 47°8 mm to 32 mm Horizontal FOV 43° to 15°, vertical FOV 23° to 9°, diagonal FOV 50° to 17° Horizontal FOV 42° to 15°, vertical FOV 23° to 8°,diagonal FOV 49° to 17°Lens MountIntegrated IlluminatorIR Range Up to 330 ft (100 m) Wavelength 850 nmVideoMaximum Resolution 1920 × 10803840 × 2160 Video Streams 5 defined streamsMain Stream 50 Hz 50 fps (1920 × 1080, 1280 × 720) 25 fps (3840 × 2160, 3072 × 1728, 2560 × 1440,1920 × 1080, 1280 × 720)60 Hz 60 fps (1920 × 1080, 1280 × 720) 30 fps (3840 × 2160, 3072 × 1728, 2560 × 1440,1920 × 1080, 1280 × 720) Sub-Stream50 Hz 25 fps (704 × 576, 640 × 480)60 Hz 30 fps (704 × 480, 640 × 480)Third Stream50 Hz 25 fps (1920 × 1080, 1280 × 720, 704 × 576, 640 × 480)60 Hz 30 fps (1920 × 1080, 1280 ×720, 704 × 480, 640 × 480) Fourth Stream50 Hz 25 fps (704 × 576, 640 × 480)60 Hz 30 fps (704 × 480, 640 × 480) Fifth Stream50 Hz 25 fps (704 × 576, 640 × 480)60 Hz 30 fps (704 × 480, 640 × 480) Video CompressionMain stream H.265+/H.265/H.264+/H.264 Sub stream H.265/H.264/MJPEGThird stream H.265/H.264/MJPEGFourth stream H.265/H.264/MJPEG Fifth stream H.265/H.264/MJPEGH.264 Type Baseline Profile/Main Profile/High ProfileH.264+ Main stream supports H.265 Type Main profileH.265+ Main stream supports Video Bit Rate 32 Kbps to 16 MbpsSVC H.265 and H.264 support AudioAudio Compression G.711/G.722.1/G.726/MP2L2/PCMAudio Bit Rate 64 Kbps (G.711)/16 Kbps (G.722.1)/16 Kbps (G.726)/32–192 Kbps (MP2L2)Environment Noise Filtering YesAudio Sampling Rate 8 kHz/16 kHz/32 kHz/44.1 kHz/48 kHzSmart FeaturesSmart Event Line crossing detection, up to 4 lines configurable Intrusion detection, up to 4 regions configurableRegion entrance detection, up to 4 regions configurableRegion exiting detection, up to 4 regions configurableUnattended baggage detection, up to 4 regions configurable Object removal detection, up to 4 regions configurableScene change detection, audio exception detection, defocus detectionBasic Event Motion detection, video tampering alarm, exception (network disconnected, IP address conflict,illegal login, HDD full, HDD error)Face Capture Detects up to 40 faces simultaneouslyHard Hat Detection Detects up to 30 human targets simultaneouslySupports up to 4 shield regionsLinkage Method Upload to FTP/NAS/memory card, notify surveillance center, send e-mail, trigger alarm output,trigger recording, trigger captureRegion of Interest 4 fixed regions for main stream, sub stream, and third stream, and dynamic face trackingSpecifications (continued)DS-2XE6825G0-IZHSDS-2XE6885G0-IZHSImageImage EnhancementBLC, HLC, defog, EIS, distortion correction, 3D DNRImage Settings Saturation, brightness, contrast, sharpness, AGC, and white balance are adjustable by client software or Web browser Target Cropping YesDay/Night Switch Day/Night/Auto/Schedule/Triggered by alarm inPicture OverlayLogo picture can be overlaid on video with 128 × 128 24-bit bmp formatNetwork Network StorageSupports microSD/SDHC/SDXC card (256 GB), local storage, and NAS (NFS, SMB/CIFS), ANRIf used with a Hikvision high-end class memory card 1, memory card encryption and health detection are supportedProtocolsTCP/IP, ICMP, HTTP, HTTPS, FTP, DHCP, DNS, DDNS, RTP, RTSP, RTCP, PPPoE, NTP, UPnP, SMTP, SNMP, IGMP, 802.1x, QoS, IPv6, UDP, Bonjour, SSL/TLS API ONVIF (PROFILE S, PROFILE G), ISAPI, SDKSecurityPassword protection, complicated password, HTTPS encryption, 802.1x authentication (EAP-MD5), watermark, IP address filter, basic and digest authentication for HTTP/HTTPS, WSSE and digest authentication for ONVIF, TLS1.2 Simultaneous Live ViewUp to 20 channelsUser/HostUp to 32 users. 3 user levels: administrator, operator, and user ClientiVMS-4200, Hik-Connect, HikCentral Web BrowserPlug-in required live view: IE8–11Plug-in free live view: Mozilla Firefox 52+InterfaceCommunication Interface1 RJ-45 10M/100M self-adaptive Ethernet port, optical interface FC RS-485 (half duplex, HIKVISION, Pelco-P, Pelco-D, self-adaptive) Audio 1 line in/outAlarm1 input, 1 output (maximum 24 VDC, 1 A or 110 VAC 500 mA) Interface StyleConnector panelVideo Out1Vp-p composite output (75 Ω/CVBS)On-Board StorageBuilt-in microSD/SDHC/SDXC slot, up to 256 GBGeneralFirmware VersionV5.5.96Web Client Language 32 languages: English, Russian, Estonian, Bulgarian, Hungarian, Greek, German, Italian, Czech, Slovak, French, Polish, Dutch, Portuguese, Spanish, Romanian, Danish, Swedish, Norwegian, Finnish, Croatian,Slovenian, Serbian, Turkish, Korean, Traditional Chinese, Thai, Vietnamese, Japanese, Latvian, Lithuanian,Portuguese (Brazil)General Function Anti-flicker, heartbeat, mirror, privacy mask, pixel counterReset Reset via reset button on camera body, Web browser, and client softwareStartup and Operating Conditions -40° to +60° C (-40° to +140° F), humidity 95% or less (non-condensing)Storage Conditions -30° to +60° C (-22° to +140° F), humidity 95% or less (non-condensing)Power Supply 100 to 240 VAC, PoE (42.5 to 57 V, 802.3 at), terminal blockPower Consumption and Current 100 to 240 VAC, 0.4 A, maximum 18 W; PoE (802.3at, 42.5 to 57 V), 0.55 to 0.45 A, maximum 18 WMaterial Stainless steel 316L and anti-corrosion coating Heater YesDimensions Camera: 352 mm × 200 mm × 214 mm (13.6" × 7.9" × 8.4")With package: 438 mm × 283 mm × 303 mm (17.2" × 11.1" × 11.9")Weight Camera: 14 kg (37.5 lb)With package: 15 kg (40.2 lb) ApprovalsEMC 47 CFR Part 15, Subpart B; EN 55032: 2015, EN 61000-3-2: 2014, EN 61000-3-3: 2013, EN 50130-4: 2011+A1: 2014; AS/NZS CISPR 32: 2015; ICES-003: Issue 6, 2016; KN 32: 2015, KN 35: 2015Safety UL 60950-1, IEC 60950-1:2005 + Am 1:2009 + Am 2:2013, EN 60950-1:2005 + Am 1:2009 + Am 2:2013, IS13252(Part 1):2010+A1:2013+A2:2015Environment 2011/65/EU, 2012/19/EU, Regulation (EC) No 1907/2006Protection IP68 (IEC 60529-2013) Explosion-proof:ATEX: Ex II 2 G D Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68IECEx: Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68 UL(Zone): Class I, Zone 1, AEx db IIC T6 Zone 21, AEx tb IIIC T80°CcUL(Zone): Ex db IIC T6 Gb X Ex tb IIIC T80°C Db XUL/cUL (Division): Class I, Division 2, Groups A,B,C and D,T6; Class II, Division 2, Groups F and G,T80°C Anti-Corrosion: NEMA 4X (NEMA 250-2014), C5 (ISO 6270-1, ISO 9227) Explosion-Proof Certificate ATEX: Ex II 2 G D Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68 IECEx: Ex db IIC T6 Gb/Ex tb IIIC T80°C Db IP68For explosive gas atmospheres, the maximum surface temperature is 85° CFor flammable dust atmospheres, the maximum surface temperature is 80° CIIC: for explosive gas atmospheres other than mines susceptible to firedamp For explosive gas mixture atmospheres: Zone 1, Zone 2, Zone 21, Zone 221You are recommended to purchase the memory card together with the product if needed. After ordering, the memory card will be installed to product during manufacturing.DimensionsAccessoriesNOT INCLUDEDDS-1707ZJ-Y-AC (OS)Wall Mount。

18 590 12 Rev. --RH255, RH265Owner's ManualIMPORTANT: Read all safety precautions and instructions carefully beforeoperating equipment. Refer to operating instruction of equipment that this engine powers. Ensure engine is stopped and level before performing any maintenance or service.Warranty coverage as outlined in the warranty card and on . Please review carefully as it provides you speci fi c rights and obligations.To maintain compliance with applicable emission regulations, exhaust system backpressure may not exceed limits which can be found on . Search by Model No., select Read More, then select Specs tab.Record engine information to reference when ordering parts or obtaining warranty coverage.Engine Model Speci fi cation Serial Number Purchase DateEN DEESE ESS FRC FRF HR ID IT PT RO RU SL TR ZH218 590 12 Rev. -- WARNING: A hazard that could result in death, serious injury, or substantial property damage.CAUTION: A hazard that could result in minor personal injury or property damage.NOTE: is used to notify people of important installation, operation, or maintenance information.Explosive Fuel can cause and severe burns.Do not tank whileengine is hot or running.Gasoline is extremelyWARNINGHot Parts can cause severe burns.Do not touch engine while operating or just after stopping.Never operate engine with heat shields or guardsremoved.WARNINGRotating Parts can cause severe injury.Stay away while engine is in operation.Keep hands, feet, hair, and clothing away from all moving parts to preventinjury. Never operate engine with covers, shrouds, orguards removed.WARNINGAccidentalStarts can cause severe injury or death.Disconnect and ground spark plug lead(s)before servicing.Before working on engine or equipment, disable engine as follows: 1) Disconnect spark plug lead(s). 2) Disconnect negative (–)battery cable from battery.WARNINGCarbonMonoxide can cause severe nausea, fainting or death.Avoid inhaling exhaust fumes.Engine exhaust gases contain poisonous carbon monoxide. Carbon monoxide is odorless, colorless, and can causedeath if inhaled.CAUTIONElectrical Shock can cause injury.Do not touch wires while engine isrunning.ENPre-Start Checklist1. Check oil level. Add oil if low. Do not overfi ll.2. Check fuel level. Add fuel if low. Check fuel system components and lines for leaks.3. Check and clean cooling areas, air intake areas and external surfaces of engine (particularlyafter storage).4. Check that air cleaner components and all shrouds, equipment covers, and guards are in placeand securely fastened.5. Check spark arrestor (if equipped).18 590 12 Rev. 3WARNINGCarbon Monoxide can causesevere nausea, fainting or death.Avoid inhaling exhaust fumes.Engine exhaust gases contain poisonouscarbon monoxide. Carbon monoxide isodorless, colorless, and can cause death ifinhaled.WARNINGRotating Parts can cause severeinjury.Stay away while engine is inoperation.Keep hands, feet, hair, and clothing awayfrom all moving parts to prevent injury. Neveroperate engine with covers, shrouds, orguards removed.NOTE: Choke position for starting may varydepending upon temperature and otherfactors. Once engine is running andwarm, turn choke to OFF position.NOTE: Extend starter cord periodically tocheck its condition. If cord is frayedhave it replaced immediately by aKohler authorized dealer.NOTE: Do not crank engine continuously formore than 10 seconds. Allow a 60second cool down period betweenstarting attempts. Failure to followthese guidelines can burn out startermotor.NOTE: If engine develops suffi cient speed todisengage starter but does not keeprunning (a false start), engine rotationmust be allowed to come to a completestop before attempting to restartengine. If starter is engaged whilefl ywheel is rotating, starter pinion andfl ywheel ring gear may clash, resultingin damage to starter.1. Turn fuel shut-off valve to ON position (ifequipped).2. Start engine as follows:Cold engine: Place lever in choke position.Warm engine: Place lever in full throttle/FAST position.3. Retractable Start: Slowly pull starter handleuntil just past compression-STOP! Returnstarter handle; fi rmly pull straight out to avoidexcessive rope wear from starter rope guide.Electric Start: Activate starter switch.Release switch as soon as engine starts. Ifstarter does not turn engine over, shut offstarter immediately. Do not make furtherattempts to start engine until condition iscorrected. Do not jump start. See your Kohlerauthorized dealer for trouble analysis.4. Gradually move lever to FAST position afterengine starts and warms up. Engine/equipment may be operated during warm upperiod, but it may be necessary to leavechoke partially on until engine warms up.1. Use proper oil for temperature expected.2. Disengage all possible external loads.3. Use fresh winter grade fuel. Winter gradefuel has higher volatility to improve starting.Stopping1. If possible, remove load by disengaging allPTO driven attachments.2. Move lever to stop position.3. If equipped, close fuel shut-off valve.Refer to operating instructions of equipmentthis engine powers. Do not operate this engineexceeding maximum angle of operation; seespecifi cation table. Engine damage could resultfrom insuffi cient lubrication.NOTE: Do not tamper with governor setting toincrease maximum engine speed.Overspeed is hazardous and will voidwarranty.If this engine is operated at an altitude of 4000ft. (1219 meters) or above, a high altitudecarburetor kit is required. To obtain high altitudecarburetor kit information or to fi nd a Kohlerauthorized dealer, visit orcall 1-800-544-2444 (U.S. and Canada).This engine should be operated in its originalconfi guration below 4000 ft. (1219 meters).Operating this engine with the wrong engineconfi guration at a given altitude may increaseits emissions, decrease fuel effi ciency andperformance, and result in damage to theengine.418 590 12 Rev. --518 590 12 Rev. ENWARNINGBefore working on engine or equipment, disable engine as follows: 1) Disconnect spark pluglead(s). 2) Disconnect negative (–) battery cable from battery.Accidental Starts can cause severe injury or death.Disconnect and ground spark plug lead(s) before servicing.Normal maintenance, replacement or repair of emission control devices and systems may beperformed by any repair establishment or individual; however, warranty repairs must be performed by a Kohler authorized dealer found at or 1-800-544-2444 (U.S. and Canada).Oil RecommendationsWe recommend use of Kohler oils for best performance. Other high-quality detergent oils (including synthetic) of API (American Petroleum Institute) service class SJ or higher are acceptable. Select viscosity based on air temperature at time of operation as shown in table below.Check Oil LevelNOTE: To prevent extensive engine wear ordamage, never run engine with oil level below or above operating range indicator on dipstick.Ensure engine is cool. Clean oil fi ll/dipstick areas of any debris.1. Remove dipstick; wipe oil off.2. Reinsert dipstick into tube; rest on oil fi ll neck; turn counterclockwise until cap drops down to lowest point of thread leads; do not thread cap onto tube.a. Remove dipstick; check oil level. Level should be at top of indicator on dipstick.orb. Remove oil fi ll plug. Level should be upto point of over fl owing fi ller neck.3. If oil is low, add oil up to point of over fl owing fi ller neck.4. Reinstall dipstick or oilfi ll plug and tighten securely.618 590 12 Rev. -- Change oil while engine is warm.1. Clean area around oil fi ll cap/dipstick and drain plug.2. Remove drain plug and oil fi ll cap/dipstick. Drain oil completely.3. Reinstall drain plug. Torque to 13 ft. lb. (17.6 N·m).4. Fill crankcase with new oil, up to point of over fl owing fi ller neck.5. Reinstall oil fi ll cap/dipstick and tighten securely.6. Dispose of used oil in accordance with local ordinances.This switch is designed to prevent enginefrom starting in a low oil or no oil condition. Oil Sentry ™ may not shut down a running engine before damage occurs. In some applications this switch may activate a warning signal. Read your equipment manuals for more information.Explosive Fuel can cause and severe burns.ll fuel tank while engine is hot or running.Gasoline is extremely fl ammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away ames. Spilled fuel could and should NOT be used; effects of old, stale or contaminated fuel are not warrantable.Fuel must meet these requirements:● Clean, fresh, unleaded gasoline.● Octane rating of 87 (R+M)/2 or higher.● Research Octane Number (RON) 90 octane minimum.● Gasoline up to 10% ethyl alcohol, 90% unleaded is acceptable.● Methyl Tertiary Butyl Ether (MTBE) andunleaded gasoline blend (max 15% MTBE by volume) are approved.● Do not add oil to gasoline.● Do not over fi ll fuel tank.● Do not use gasoline older than 30 days.Explosive Fuel can cause and severe burns.ll fuel tank while engine is hot or running.Gasoline is extremely fl ammable and its vapors can explode if ignited. Store gasoline only in approved containers, in well ventilated, unoccupied buildings, away ames. Spilled fuel could 1. Clean area around fuel cap.2. Remove fuel cap. Fill to base of fi ller neck. Do not over fi ll fuel tank. Leave room for fuel to expand.3. Reinstall fuel cap and tighten securely.Fuel LineLow permeation fuel line must be installed on carbureted Kohler Co. engines to maintain EPA and CARB regulatory compliance.ENCAUTIONElectrical Shock can cause injury.Do not touch wires while engineis running.Clean out spark plug recess. Remove plug andreplace.1. Check gap using wire feeler gauge. Adjustgap, see specifi cation table for adjustment.2. Install plug into cylinder head.3. Torque plug to 20 ft. lb. (27 N·m).NOTE: Operating engine with loose ordamaged air cleaner componentscould cause premature wear andfailure. Replace all bent or damagedcomponents.NOTE: Paper element cannot be blown outwith compressed air.Unhook cover latch and remove air cleanercover.Paper Element: Remove and replace paperelement.Foam Element: Remove foam element;replace or wash in warm water with detergent.Rinse and allow to air dry.Reinstall air cleaner cover and secure coverlatch.Ensure both ends of breather tube are properlyconnected.WARNINGHot Parts can cause severeburns.Do not touch engine whileoperating or just after stopping.Never operate engine with heat shields orguards removed.Proper cooling is essential. To prevent overheating, clean screens, cooling fi ns, and otherexternal surfaces of engine. Avoid sprayingwater at wiring harness or any electricalcomponents. See Maintenance Schedule.We recommend that you use a Kohlerauthorized dealer for all maintenance,service, and replacement parts for engine.To fi nd a Kohler authorized dealer visit or call 1-800-544-2444(U.S. and Canada).StorageIf engine will be out of service for 2 months ormore follow procedure below.1. Add Kohler PRO Series fuel treatment orequivalent to fuel tank. Run engine 2-3minutes to get stabilized fuel into fuel system(failures due to untreated fuel are notwarrantable).2. Change oil while engine is still warm fromoperation. Remove spark plug(s) and pourabout 1 oz. of engine oil into cylinder(s).Replace spark plug(s) and crank engineslowly to distribute oil.3. Disconnect negative (-) battery cable.4. Store engine in a clean, dry place.7 18 590 12 Rev. 818 590 12 Rev. -- *Exceeding maximum angle of operation may cause engine damage from insuf fi cient lubrication.Additional speci fi cation information can be found in service manual at .Exhaust Emission Control System for models RH255, RH265 is EM for U.S. EPA, California, and Europe.Any and all horsepower (hp) references by Kohler are Certi fi ed Power Ratings and per SAE J1940 & J1995 hp standards. Details on Certi fi ed Power Ratings can be found at .Do not attempt to service or replace major engine components, or any items that require specialtiming or adjustment procedures. This work should be performed by a Kohler authorized dealer.。