CalDet Environmental Monitoring Guide

This document is designed to help those w/ hardware, software and maintenance of Environmental Monitoring system, specifically at CalDet. Additionally there are documents by Erik Beall and Hucian Ping that can found on the DCS computer at CalDet.

Basic Operation Guide

The FP Unit and the Environmental Display program are designed to work symbiotically to monitor and record the pressure, humidity, temperature and TOF rate. The basics of controlling all of monitoring begin w/ starting the FileMonitor.exe by using the shortcut on the desktop of minosdcs1. After that it is necessary to start the Environmental Data Display using the shortcut to EnvDisplay.exe. It is possible to do this either from the actual terminal in the T7 or T11 control rooms or by logging into pcminos01 and typing "vncviewer minosdcs1" w/ the standard MINOS password from the prompt. The FileMonitor is designed to restart the Environmental Display if for some reason it should stop taking data, and should ALWAYS be running as should the Environmental Display. Double clicking on either icon will bring up the appropriate Display and start it running. For the FileMonitor this is all that is needed, and once it is running it is best just to let it alone. The Environmental Display is similar in that it is programmed to start running immediately upon double clicking on the shortcut. This means that all the thermocouples, all the counters, the 5 Cerenkov pressure transducers and the standalone temperature, humidity and pressure gauges are initialized and are read out on the Environmental Display, even if they are not connected. Anything more advanced involving hardware can be found below, and any concerns involving software should be conveyed to Huciana Ping, pinghc@hep.wisc.edu or Eric Beall ebeall@physics.d.umn.edu.

Basic Environmental Hardware/Installation

The Field Point unit consists of 7 National Instrument Field Point Modules. There is one Analog Input Module which has 16 channels to possibly monitor 8 Voltages and 8 Currents, and is currently setup up to monitor the pressures, humidity and one temperature gauge. There is one Digital Input Module which is established to record the PS signal as well as the TOF signal. There are 4 Thermocouple modules to monitor up to 32 thermocouples, and there is a communication relay module to transmit all information into the data stream.

Analog Input Module

This module is connected the Humidty monitor, Pressure monitor, a standalone non-thermocouple Temperature monitor and the 5 Cerenkov pressures from theTransducer Cerenkov pressure box. The Humidity, Pressure and Temperature monitors output a voltage which is read in on Channels 0,1,2 in the Voltage input section of the FP-AI, w/o any grounds. This means that wires carrying the monitored information are going into the V row on the FP-AI where the numbers on the inputs correspond to channels. There are 16 voltage input numbers coresponding to 8 channels for readout, this means that voltage input 1&2 correspond to Channel 1, input 3&4 correspond to Channel 2 and so on. The Pressure monitor itself is connected to an 8 pin male connector, which attaches to a wire w/ a female 8 pin female connector that is connected to the FP-AI. There are only 4 wires attached to the 8 pins so upon connection there is only one possible orientation of joining the connector that makes sure that 4 appropriate pins match their mate across the connector.

Monitors wire connections to FP-AI

Humidity/Temperature: Red wire to Input 5, White - 3, Green & Bare - 20, Black- 19

Pressure: Bare/White/Black - 18, Red - 17, Green - 1

Voltage References: + Voltage goes to the V input on the top right of the FP and the- Voltage goes to the C input on top right of the FP

The Transducer box has 5 individual transducers that monitor 5 different differential pressures in the Cerenkov. There is a male 9-pin connector on the transducer box where pins 1-5 correspond to the individual Transducers and pins 6-9 are all common ground. There is a small numbering scheme on the front of the female 9-pin connector, connected to the wire from the FP-AI to the Transducer box male connector, such that if the labels come off there is no need to take the connector apart to figure out which individual transducer corresponds to which wire. Even though the FP-AI has a common ground, all the even voltage inputs, the wire from the Transducer box to the FP-AI module has 5 grounds as well that should be connected to the FP-AI. The Transducers produce voltages from one volt to slightly over ten Volts depending on the individual transducer, which is within the FP-AI range of 0-10.4 Volts per channel. There is also an external 12V power supply connected to this module, and the FP-AI will give erroneous results across all channels, voltage and current, if at any point the 12V is not being supplied to the FP-AI. Transducer1 is connected to the FP-AI w/ the signal wire in the number 7 input and an arbitrary grounding wire in the number 8 input, transducer2 signal wire to input 9 and arbitrary grounding wire to input 10, so on and so on.

Transducer 1 - when the locations of these transducers are determined they can be added to this documentation.

Transducer 2

Transducer 3

Transducer 4

Transducer 5

Digital Input Module

The Digital Input Module is setup to monitor TTL pulses under the names of Counter1, Counter2 etc... Counter1is the PS signal which is the indicator of when the beam spill is approaching. The PS also acts as a trigger so that the environmental data will be written out every time CalDet gets a beam spill as well as every 5 minutes. The second counter, Counter2, is connected to the TOF to monitor how many hits the TOF receives per beam spill. To operate, this module needs a 3.3 V reference voltage. MORE NEEDS TO BE ADDED HERE WHEN ALL COUNTERS ARE COMPLETED.

Thermocouple Modules

By far the easeist of the Modules to handle, because all the setup that is required is connecting the thermocouples to the inputs. The following is a list of Detector locations and channel inputs for all the thermocouples.

M3CH0 (Module 3 Thermocouple 0) - FP Unit rack

M3CH1 ->M3CH7 - FP Unit rack

M4CH0 - FP Unit rack

M4CH1 - LI Rack

M4CH2 - Bottom of the last plane

M4CH3 - Top of last plane

M4CH4 - Far Detector Rack 2

M4CH5 - Far Detector Rack 1

M4CH6 - Bottom of detector longitudinally halfway

M4CH7 - Top of Plane 12

M5CH0 - Far Detector Rack 0

M5CH1 - Front End rack

M5CH2 - HV rack

M5CH3 - Bottom of plane 0

M5CH4 - Minder 6 rack

M5CH5 - Minder 7 rack

M5CH6 - Minder 8 rack

M5CH7 - Minder 5 rack

M6CH0 - Minder 4 rack

M6CH1 - Master Crate 2

M6CH2 - Master Crate 1

M6CH3 - Minder 3 rack

M6CH4 - Minder 2 rack

M6CH5 - Minder 1 rack

M6CH6 - FP Unit rack

M6CH7 - FP Unit rack

Communication Module.

No installation required.

If any problems occur in the Installation of the Field Point Unit a good troubleshooting tool is the Field Point Explorer. This program gives the raw outputs in currents and voltages of the FP modules that are connected to the communication module. On the main screen of the minosdcs0.cern.ch machine there is a shortcut to both the field point explorer as well as the environmental display.

Any and all software questions or problems should be referred to Erik Beall ebeall@physics.d.umn.edu, Jason Koskinen kosk0083@d.umn.edu or Huciana Ping pinghc@hep.wisc.edu.

Trouble Shooting:

The Environmental Monitor Display is running but it is not taking data, and the Field Point Explorer is registering values off of the FP Unit.

Occasionally the Driver stalls and cannot be made to reconnect w/ the FP unit and so the computer needs to be restarted. In the past this has always solved the problem.

The red lights are all 'on' for the Thermocouple FP but it does not recognize the attached thermocouples and the green power light is not 'on'.

The Thermocouple FP has two pieces, a front and back face. The two faces have metal junctions on the bottom of each that match up and must be connected and must be firmly secured to each other. By firmly secure I mean put the two faces beween your hand and push them together hard, and then tap the side of the FP to see if you can get it to reset. If you cannot get it to reset by tapping and the green light for the power has come 'on' then happy trails.