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groups:mg:htc-3000 [2020/02/05 10:58] – [Configuration for Peltier Elements and Resisitive Heaters] fienegroups:mg:htc-3000 [2024/03/20 09:36] (current) – Admin: Syntax-Update (Migration from deprecated "fontcolor" plugin to "color" plugin) klaus
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 The right switch has two positions: The right switch has two positions:
-  * In the upper position the current voltage output by the HTC in order to monitor the current temperature is displayed. +  * In the lower position the current voltage output by the HTC in order to monitor the current temperature is displayed. 
-  * In the lower position the voltage corresponding to the wanted temperature is displayed. +  * In the upper position the voltage corresponding to the wanted temperature is displayed. 
-While you <fc #ff0000>can't</fc> directly read the current temperature, the display allows you to gauge how well the system's temperature is stabilized or see if there are any problems.\\+While you <color #ff0000>can't</color> directly read the current temperature, the display allows you to gauge how well the system's temperature is stabilized or see if there are any problems.\\
  
 The left switch enables or disables the output temperature. Turn off while changing the set temperature.\\ The left switch enables or disables the output temperature. Turn off while changing the set temperature.\\
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-The Display is powered by a 9V supply+The display is powered by a 9V supply. It only measures correctly if the -9V input and the Vin- input are "seperated". The following schematic shows how it was done in this case: \\ 
 +{{:groups:mg:display2.png?nolink&250|}} 
 +{{:groups:mg:display1.png?nolink&450 |}} 
 +The Vin+ input (In_High) is directly connected to the HTC T-Monitor Outputs.
  
 ==== Back Panel ==== ==== Back Panel ====
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 The necessary temperatures are: The necessary temperatures are:
 ^ SHG  ^ Temperature  ^ Voltage  ^ ^ SHG  ^ Temperature  ^ Voltage  ^
-| #1 | 38,6 °C | 0,48 V | +| #1   | 38,6 °C      | 0,48 V   | 
-| #2 | 29,3 °C | 0,97 V | +| #2   | 29,3 °C      | 0,97 V   | 
-| #3 | 18,8 °C | |+| #3   | 18,8 °C      | 1,64 V   |
 (Status of 04.02.2020) (Status of 04.02.2020)
  
 The temperaturecontrolling processes somewhat like this: \\ The temperaturecontrolling processes somewhat like this: \\
-{{:groups:mg:charakterisierung.png?nolink&500|Characterization of SHG #3}}+{{ :groups:mg:temperaturecontrollingdiagramm.pdf |Characterization of SHG #3}}
 ===== Replacing the HTC ===== ===== Replacing the HTC =====
 Unscrew the HTC and detach the pins. You may also have to unscrew the heatsink from the metal shroud. Then plug the new HTC back in and tighten all screws firmly. Unscrew the HTC and detach the pins. You may also have to unscrew the heatsink from the metal shroud. Then plug the new HTC back in and tighten all screws firmly.
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 | **Problem** | **Possible Solution(s)** | | **Problem** | **Possible Solution(s)** |
-| When viewing "T-Soll", the display only shows "1" | Try turning the "Set-T"-potentiometer in one direction for a while. If this doesn't help, try the other direction. Otherwise check the connections of the potentiometer |+| When viewing "T-Soll", the display only shows "1"/"-1" | Try turning the "Set-T"-potentiometer in one direction for a while. If this doesn't help, try the other direction. Otherwise check the connections of the potentiometer. If you haven't simulated, that the display is floating (see Power Supply), this may be the reason. |
 | Heating and cooling are mixed up | Change the polarity of the peltier element. See page 8 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for detailed instructions. | | Heating and cooling are mixed up | Change the polarity of the peltier element. See page 8 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for detailed instructions. |
 | The Element neither heats nor cools | Check the connector, test the element. Otherwise see Power Supply Related Problems | | The Element neither heats nor cools | Check the connector, test the element. Otherwise see Power Supply Related Problems |
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   * a 10 kOhm trim-potentiometer ("Gain")   * a 10 kOhm trim-potentiometer ("Gain")
   * a 100 kOhm trim potentiometer ("Current Limit")   * a 100 kOhm trim potentiometer ("Current Limit")
-  * a 10 MOhm and a 100 kOhm SMD-resistor for the display+  * a 10 MOhm and a 100 kOhm SMD-resistor for the displayblack 
 +  * two OP07, a 5V reference, two 10 kOhm resistors and a 4,7 kOhm resistor for the display
   * a 1 µF capacitor for an integrator time of 1 second (the integral time constant can be set between 0 to 10 seconds, see page 8 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for further information)   * a 1 µF capacitor for an integrator time of 1 second (the integral time constant can be set between 0 to 10 seconds, see page 8 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for further information)
   * a 12,1 kOhm resistor, for a 10 kOhm sensor (see page 7 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for further information)   * a 12,1 kOhm resistor, for a 10 kOhm sensor (see page 7 of the {{ :groups:mg:htcseries_datasheet.pdf |datasheet}} for further information)