Differences

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--- d2:laser_controller [2022/02/11 17:34] – external edit 127.0.0.1
+++ d2:laser_controller [2024/03/27 15:33] (current) – Captilizing Rth_RTN to match table. Thomas Bersano
@@ Line 28: / Line 28: @@
 As with __any__ diode laser and controller, improper usage can cause irreparable damage to the diode.
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 <WRAP center round important 60%>
 If you are considering using an Uninterruptible Power Supply (UPS) to guarantee operation of your Vescent products through a brown out or black out, great care should be taken in choosing the model.  Lower cost models tend to produce modified square wave voltage profiles.  The high-frequency components of such a voltage profile may interact poorly with the D2-005 (and down-stream active Vescent modules).  If you do choose to use a UPS, select a model that will provide a sine wave voltage profile without higher harmonic components to avoid potential damage to your high-value equipment.
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+<WRAP center round important 60%>
+Both temp control loops can be toggled with a board-level switch located under the PID tuning switches. If you are experiencing problems with either of your temp loops, please toggle this switch off and then on again, as it's possible for the switch to get bumped into an intermittent position where it looks on, but is off. The most common symptom of this issue is that the faulty temp loop's front panel LED will turn red, but this does not always happen.
+</WRAP>
 ==== Purchase Includes: ====
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 T1 is also set at the factory and should not require further adjustment.  However, the T1 trimpot can be accessed by removing the right panel from the enclosure.  Note: Before attempting to set the set point temperature, you must connect a thermal plant to the D2-105.  If you do not have a plant attached to the temperature loop, the set point range will appear to be limited to less than ~12°C.
+<WRAP center round important 60%>
+Both temp control loops can be toggled with a board-level switch located under the PID tuning switches (see <imgref standby_switch>). If you are experiencing problems with either of your temp loops, please toggle this switch off and then on again, as it's possible for the switch to get bumped into an intermittent position where it looks on, but is off. The most common symptom of this issue is that the faulty temp loop's front panel LED will turn red, but this does not always happen.
+</WRAP>
+<imgcaption standby_switch|The location of the control switches for T1 and T2.>{{ :d2:d2-105:standby_switch_loation.jpg?600 |}}</imgcaption>
 **Temp Lock (Dual position switch)**
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 The temperature servo input is summed to the T2 temperature set point signal and can be used to make electronic perturbations to the laser diode temperature.  The Temp Servo Input, has two settings: "Low" and "High" gain. The default settings is "Low" but can be changed by a switch accessible on the right side panel. See <imgref VPN00267>.
-<WRAP center round box 570ptx>
-Both Temp control loops can be toggled with a board-level switch located under the PID tuning switches. If you are experiencing problems with either of your temp loops, please toggle this switch off and then on again, as it's possible for the switch to get bumped into an intermittent position where it looks on, but is off. The most common symptom of this issue is that the faulty temp loop's front panel LED will turn red, but this does not always happen.
-</WRAP>
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 **Laser Temp Output (8-pin connector)**
-An 8-pin Hirose connector (see <tabref TECconnectortable> for identity of connectors) carries the signals for the temperature control of the Laser module.  The wiring diagrams are shown in <tabref TEC_connector_pinout> below, where 1 (2) refer to stage 1 (2) temperature control, which stabilizes the Laser Housing (Laser Diode). Rth and Rth_Rtn are the two ends of a 10 kΩ [[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]].
+An 8-pin Hirose connector (see <tabref TECconnectortable> for identity of connectors) carries the signals for the temperature control of the Laser module.  The wiring diagrams are shown in <tabref TEC_connector_pinout> below, where 1 (2) refer to stage 1 (2) temperature control, which stabilizes the Laser Housing (Laser Diode). Rth and Rth_RTN are the two ends of a 10 kΩ [[http://www.analogtechnologies.com/ath10kr8.html|Analog Technologies ATH10KR8 Thermistor]].
 <WRAP round center box 230px><tabcaption TEC_connector_pinout| TEC connector pin out>
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 **Remote Interlock**
-The remote interlock can be used to disable the laser diode output via an interlock control.  When this input is shorted the laser diode output is ON.  When the input is open the diode output is OFF.  If not used, leave a shorting cap over this BNC. Once the interlock has been tripped, the laser will stay off until it is manually reset with the front panel switch.
+The remote interlock can be used to disable the laser diode output via an interlock control.  When this input is shorted the laser diode output is ON.  When the input is open the diode output is OFF.  If not used, leave a 50Ω BNC terminator over this BNC. Once the interlock has been tripped, the laser will stay off until it is manually reset with the front panel switch.
 **Setpoint In**