Note: It is important that the differential gauge needle drops slowly.

注意: 重要的是差压计指针缓慢下降.

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After memory is set, disconnect differential gauge.

记忆设置后, 断开压差表.

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Slowly loosen hose at test cock # 2 until differential gauge rises to 2 pre - tighten hose.

慢慢松开测试旋 塞 2号上的软管直到差压计升到2为止.预先紧固软管.

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Connect, vent and prepare the differential gauge. Refer to instructions furnished with the gauge.

连接 、 排气和预备压差表. 参阅压差表附带的使用说明.

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Slowly loosen hose connection at TC # 3 until differential gauge rises to about 2 PSI, then tighten.

慢慢松开连接在测试旋塞3 号 上的软管直到压差表上升到大约2PSI, 然后紧固.

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