On the C3683-02： Use a dual output power supply that can be set to Vout=±15 V and has a current capacity of Iout=100 mA. Also use a power supply whose ripple voltage is ±3 mVp-p or lower to suppress power supply noise.
Recommended power supplies
On the C9068-01 and C9069-01, use the AC adapter that comes supplied with them.
The PSD signal processing circuit has through-holes for externally connecting a PSD. Solder the leads or shield wires to connect between the PSD terminals and through-hole terminals. Using shielded wires is recommended to reduce effects from noise.
PSD signal processing circuits are compatible with the following multi-element photodiodes.
The C9069-01 provide the correct output only when light is incident on all 4 photodiode elements.
|Signal processing circuit||Photodiode|
|C3683-02, C9068-01||Dual type|
The repetition frequency and duty ratio cannot be changed in either of these circuits.
On the C3683-02: The gain can be changed just by replacing the feedback resistor and capacitor inserted in the first stage amp's socket.
On the C9068-01 and C9069-01: The gain cannot be changed.
On the C3683-02:
Cannot be used with pulsed light. When pulsed light is off, the divider IC within the PSD signal processing circuit issues an error,
and outputs a random value within the supply voltage range (±15 V).
On the C9068-01 and C9069-01:
Since the incident light signal is averaged every 5 ms, these PSD signal processing circuits cannot be synchronized with pulsed
light and are therefore impossible to detect pulsed light.
The C9068-01 and C9069-01 have an RS-232C port for signal output. Using an RS-232C to USB cable allows USB connection.
Operation with the following RS-232C to USB cable has been verified: USB-RSAQ5 (I-O DATA)
However, we do not guarantee the operation because there may be a problem with the compatibility between the RS-232C to USB cable and the PC.
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