求助!excel fft算的加速度幅值和设备输出结果相差几个数量级why

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				excel计算	设备输出
X:Time (Seconds)		Y:(g)		g	Y(Mag (g) (0-peak))_frm0
0.00E+00	1	-9.36E-04	-1.788543366025	-1.788543366	3.41E-05
2.00E-03	2	5.73E-01	-1.81484013226618-7.10049174683359E-002i	-1.816228621	5.76E-05
4.00E-03	3	1.22E-01	-1.8891091202351-9.29161204282177E-002i	-1.891392787	4.06E-04
6.00E-03	4	3.91E-01	-1.97143305978611-0.304851245434635i	-1.994864053	1.13E-03
8.00E-03	5	6.02E-01	-2.87351625562275+8.70907070515525E-003i	-2.873529453	2.11E-03
1.00E-02	6	-2.02E-01	-1.48240108975123-0.515020599309593i	-1.569318071	2.44E-03
1.20E-02	7	-1.95E-01	-0.470291436804119-1.85806516306345E-002i	-0.470658343	2.91E-03
1.40E-02	8	1.50E-01	-2.25181660072627-1.12460752363472i	-2.51702604	3.97E-03
1.60E-02	9	3.41E-02	-6.19386219159302E-002+3.10200849893122E-003i	-0.062016251	3.15E-03