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campaneros edited this page Feb 25, 2021 · 82 revisions

LY Bench

Table of Contents

Check List

  1. BEFORE opening the box, check if the HV is OFF, otherwise turn it OFF

Instructions

Slow Control DCS GUI (Cooling + Temperature monitor)

Open firefox
Go to page localhost:8888
IMPORTANT DO THIS ONLY IF THERE IS NO OPEN FIREFOX WITH A GUI ALREADY RUNNING. 2 GUIS CONFLICT!!
DO NOT UNPLUG/PLUG ARDUINOS OR OTHER USB CABLES UNLESS YOU KNOW WHAT YOU'RE DOING, OTHERWISE PORT NAMES WILL BE CHANGED!
Currently:
/dev/sensor_1 External temperature+humidity sensors
/dev/sensor_0 Internal temperature+humidity sensors
/dev/ttyUSB0 Lauda Chiller
/dev/usbtmc0 LED Pulser

To check temperature graph:
https://thingspeak.com/channels/781520

Remember: Temperature should be ~22.3 degree when external temperature is 26 (and chiller is at 18.5).

Chiler

Chiller lies below the box (on the right side from the door).
The chiller temperature is set at 18.5 degrees. Pump flow config is set at 3

The status of the chiller is reported in the GUI. Normally the cooling should be COOLING OK and green

Every 2 weeks please check the level of the water (please use only demineralised water to refill, which should be close to the chiller)

The chiller should be kept ON unless there will be no measurements for more than 2 weeks. To turn ON/OFF simply press the COOLING button, which should become yellow (COOLING OFF). To turn back ON simply press the button again, which after few seconds should become green (COOLING OK)

IMPORTANT DO NOT CHANGE PARAMS UNLESS YOU KNOW WHAT YOU'RE DOING

LED

Push the yellow LED OFF button on the DCS GUI. The button will become RED and LED ON. Push again to switch OFF
Parameters: 20 KHz, High Value: 4.22V, Low Value, 0V, Length: 60ns
IMPORTANT DO NOT CHANGE PARAMS UNLESS YOU KNOW WHAT YOU'RE DOING. JUST SWITCH ON/OFF FOR NORMAL OP
LED Voltage Scan is now done using DRS4DAQ with the corresponding switch

HV

NIM power supply. Nominal voltage is 1500V, current ~350mA
**** 1450V new setting since 2021/02/01, giving PE ~16 ADC counts. @1350V PE signal very small
IMPORTANT DO NOT CHANGE CONFIG UNLESS YOU KNOW WHAT YOU'RE DOING. JUST SWITCH ON/OFF FOR NORMAL OP
REMEMBER TO CHECK THE HV BEFORE OPENING THE BOX!!
The NIM power supply is the one on the left in the NIM crate below the box
For the moment the HV is not controlled by the GUI, but should be operated manually

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