Electrical Adjustment Of The Connection Cable Circuit; 1> Removing The Upper Case - Magnescale SR138-025R Instruction Manual

4. Electrical Adjustment of the Connection Cable Circuit

(SR138R series only)
* The operations described in this section are not required for the
GB-ER series which are shipped together with the connection
cable in the electrically adjusted condition.
When connecting the SR138R series with a counter unit, use a
CH04 series (optional) connection cable.
The connection cable must be electrically adjusted together with
the used scale unit. Perform this adjustment according to the
procedures outlined below.
Electrical adjustment is performed in order to optimize the A/B
quadrature signal from the scale unit. Therefore, if the adjustment
is not performed as specified, the scale accuracy specifications
will not be satisfied.
Note
When the scale unit and counter unit connection cable (CH04
series) are ordered together, they are shipped in the adjusted
condition so no adjustment is necessary. Connect the scale unit
and cable so that the serial No. on the scale unit matches the
combination No. on the connection cable.
Required items
• Oscilloscope
(Sensitivity: 0.01 V or more,
frequency bandwidth: 1 MHz or more)
Input sensitivity : DC0.1 V/div (1 using a 10 : 1 probe)
Horizontal axis sweep : 50 ms/div to 0.5 ms/div
Trigger source : INT
Trigger mode : AUTO
• Standard screwdriver (for rotating the trimmer)
• Phillips screwdriver
(for removing and mounting the upper case)
<1> Removing the upper case
Remove the two screws M2×8 mounting the upper case of the
interface unit and remove the upper case.
Upper case
Fig. 4-1
M2×8
(E) 25