#author("2021-06-02T18:00:51+09:00","default:LabMember","LabMember")
* データロガー DL850E (横河計測) [#y77a0b96]


** Pictures [#k42430a5]
*** IPアドレス: 133.11.4.66 (2020年9月購入) [#m4fd1eaf]
#ref(L-4C_horizontal.JPG,,8%);

*** IPアドレス: 133.11.4.68 (2020年10月購入) [#jd5f5867]
#ref(L-4C_horizontal.JPG,,8%);

**How to Use [#m7c5d307]
*** L-4C [#c48594a5]
Just connect the cable to its output.~
Response function from displacement to voltage:
#ref(response_eqn.png,,10%);
#ref(Geophone_Response.png,,20%);

Parameters:
| Label. | G | f0 | Q |
| H1 | 249 | 1.071 | 1.81 |
| H2 | 243.8 | 0.9491 | 1.705 |
| H3 | 246 | 1.013 | 1.81 |
| V1 | 255 | 1.013 | 1.739 |
| V2 |243.1 | 0.9819| 1.746 |
| V3 | 263.2 | 1.061 | 1.760 |



*** L-22E [#ga251dff]
L-22E has two outputs and the actual signal is their differential, so you need to subtract one output to the other. Except for this, everything is almost the same as L-4C.~
Parameters:
| Label. | G | f0 | Q | Comment |
| GEO2 (Vert.) | 49.3 | 2.04 | 0.67 | |
| 404089806 (Horiz.) | 42.78| 2.07 | 0.732 |https://granite.phys.s.u-tokyo.ac.jp/elog/?p=3998 |
| 404089807 (Horiz.) | 45.02 | 1.92| 0.766 | https://granite.phys.s.u-tokyo.ac.jp/elog/?p=3998|


** Noise Level [#p91c5139]
will be written someday.


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