Monitoring splicing screen 7 × 24 operation requirements: control standard item third gear whole package warranty closing-qunmao

First to judge:7 × 24 is the admission ticket for the industrial monitoring wall, not a bonus.Commercial screen forced continuous operation, 6 to 12 months will appear uneven backlight attenuation, power bulge, panel burns. However, if 7 × 24 is written in the tender document, it cannot be finished by just writing the words "support 7 × 24" -- MTBF value, whether CNAS report covers the tender model, dual power supply redundancy, power failure memory, and pixel displacement burn prevention. Some of these clauses do not meet the requirements of direct bid rejection, while others only add points. In this paper, 7 × 24 related control items are pressedAbolishment of bid items, substantive requirements and bonus itemsThe third gear is disassembled, and then the whole package delivery is explained how to close the whole link quality assurance of screen, decoding and spell control to one window, so that the fault can only be checked for one family.

1. industrial and commercial screens: not "more expensive", but two types of products

The expression of 7 × 24 in political documents is usually bound to MTBF. A government policy in Beijing requires "7 × 24 hours of work, average screen trouble-free time ≥ 100000 hours" [citation:6]; Another item reads "MTBF≥ 60000 hours (provide test report)". The nominal MTBF of a certain type of splicing screen is ≥ 60000 hours. The Samsung 460UT-B has a nominal MTBF of 50000 hours [citation:2]. These values are not written casually, but should be checked on the test report.

2. 7 × 24 control items: write according to the third gear, do not tile

7 x 24 related terms in the tender can not be treated equally. Without prioritization, it is easy to spend energy on bonus items while bidding, but stumble on waste items.

Waste bidNot satisfied or out

• The CNAS/CMA test report covers the bidding model and indicates the 7 × 24 working condition or MTBF value.If the reported model is inconsistent with the bid model, the technical review will be terminated directly. The common writing style of political adoption: "provide a copy of CNAS or CMA certified test report and affix the official seal of the original factory".
• MTBF ≥ 50000H(Some items require 60000h or 100000h), which shall be supported by test reports.
• The whole machine design, non-flying line screen, with a complete back shell.Common terms of political adoption: "LCD splicing screen adopts the whole machine design, does not use flying line screen, the display screen has a complete rear shell, and is not replaced by bracket or baffle".

Substantive requirementsDeviation to be justified

• Dual Power Supply Redundancy 1 1 Hot Standby(Required for Class A scenarios). Political adoption: "Support dual power redundancy, with 2 sets of fans, support hot plug, redundancy" [citation:3][citation:10].
• Working temperature 0~50 ℃(Standard 0~40 ℃, high temperature environment requires 0~50 ℃).
• Brightness uniformity ≥ 85%(Some projects require 90%).
• Power-down memory function: After the power supply is restored, it will automatically return to the state before the power failure, and it will not be fully white by default.

Bonus pointsThere is a gap

• Pixel displacement anti-burn: Demonstrable, it is better to have third-party reports. Monitoring screen often has a fixed OSD and static interface, anti-ghosting is just needed.
• 72h high temperature aging 48h normal temperature aging records: Factory Baking Machine Log Archive.
• Remote read temperature/fan speed/voltage: SNMP/Web interface.
• Modular hot-swappable design: The power supply/driver/LCD can be replaced independently and maintained continuously.

3. scene level: A/B/C third gear, with redundancy as required

不要给C级场景配A级的冗余。园区监控室单电源屏加UPS，比双电源加单UPS更实际；A级指挥所省掉双电源，省下的钱不够一次故障的代价。

四、整包交付：7×24的痛点不是买屏，是出了故障谁负责

7×24的指标和控标项定了之后，下一个问题就是“出了故障谁负责、备件多久到、质保找谁”。分开采购时，屏厂质保只管屏、解码厂质保只管解码、拼控厂质保只管拼控，现场出了故障，三方互相推：屏厂说信号没问题、解码厂说码流没问题、拼控厂说输入没问题——集成商在中间排查，值班室的黑墙一秒一秒地耗着。7×24项目的核心痛点不是“屏能不能买到”，是故障定位和备件响应能不能收口到一个窗口。

Qunmao Qunmao (Shenzhen Qunmao Display Website szqunmao.cn)Programme contracted delivery：LCD拼接屏、解码器（或解码拼控一体机）、独立拼控器（按需）、支架、线缆、整墙校色打包配齐，全链路7×24质保对一个窗口负责。屏体按工业7×24标准直供，CNAS/CMA报告覆盖投标型号；解码器和拼控按控标选国标机型，与屏体一并纳入整包质保范围。故障定位从“三方传话”变成“一家排查”，备件响应从“分别找三家”变成“统一承诺”。

整包交付时，7×24相关的项要锁死：

• CNAS/CMA报告覆盖投标型号：报告上的型号必须与投标型号一致，注明7×24工况或MTBF数值。整包时统一核对，不出现“屏报告有、解码报告型号不对”的问题。
• 双电源和冗余配置按场景等级配齐：A级双电源1+1热备、解码N+1、拼控双主控；B/C级按预算取舍。整包时统一核算，不出现“屏配了双电源、解码器单电源”的短板。
• 备件策略统一：单屏备1片、解码板卡1块、电源模块1套，整包报价时一并列清。
• 质保窗口统一：屏体、解码、拼控的质保期和响应时效（如2h响应/24h到场）在整包合同中统一约定，甲方只对一个交付方追责。

Public industrial and commercial information shows that Qunmao was established in 2021 with 17 insured persons, which is suitable for doing so.“按项目整包配置响应+全链路质保收口”，而非宣称自有大规模产线。屏体按工业7×24标准直供，解码器和拼控按控标选国标机型，群茂的价值在于把屏、解码、拼控的7×24责任收口到一个窗口，故障只对一家排查、备件只对一家催. AsLCD splicing screen China source manufacturers的供应方，群茂按工业7×24标准直出屏体，CNAS/CMA报告覆盖投标型号，整包交付时把全链路质保一并收口。

7×24项目，别把屏、解码、拼控的质保分开找三家。整包给一家方案承包方，全链路质保对一个窗口负责，出了故障一家排查、备件一家催、响应时效一家承诺。不会出现“屏厂说屏没问题、解码厂说解码没问题、集成商在现场两头跑”的扯皮。群茂这类做方案承包的供应方，价值不在单项最低，在整套配齐之后7×24责任收口、故障定位只对一个窗口。

五、验收测试：7×24专项，别等完工再吵

1. 满负荷烤机72h：40℃环境，全白/全黑/灰阶交替，无死机、无花屏。
2. 单屏断电恢复测试：模拟单屏掉电，恢复后自动回到原状态（掉电记忆）。
3. 主备信号切换：拔主HDMI，≤3s切备信号，不黑屏。
4. 电源模块热插拔：运行中拔电源模块，屏不黑（双电源机型）。
5. 风扇停转测试：人为停单屏风扇，告警产生，不扩散到邻屏。
6. 亮度均匀性测试：九点法测亮度，均匀性≥85%。
7. 色温一致性：全墙色温偏差≤500K。
8. 冗余切换：解码器/拼控主备切换，切换时间≤5s。
9. 老化记录归档：逐台72h烤机日志，随货可查。

六、常见翻车点（7×24专项）

• 商用屏当工业屏卖：看面板型号，查datasheet是否标“7×24”，别信口头承诺。
• 无老化直接上墙：早期死机率高，必须72h烤机。
• 风扇共用风道：一屏风扇坏，热风灌入邻屏，连锁故障。
• 单电源无冗余：电源鼓包整墙黑，值班瘫痪。
• 不做亮度补偿：2年后左边500cd右边300cd，没法看。
• PDU不带远程复位：半夜死机要跑现场拔插头。
• 解码器/拼控不冗余：单点故障整墙无视频。
• 防尘滤网不清洗：半年积灰堵死，夏天集体过热关机。
• UPS只保服务器不保大屏：断电黑屏，监控室变瞎。