ecal dcs @h4

10.11.2004ECAL - DCS

1G. DissertoriETH Zürich

ECAL DCS @H4

G. Dissertori DCS Coordination Board, Nov 10, 2004

Status report

Trigger/DAQ project DCS

CMS DCS

ECAL DCS

10.11.2004ECAL - DCS


Outline

Overview

Precision Temperature Monitoring (PTM)

Humidity Measurement (HM)

ECAL Safety System (ESS)

PVSS Monitoring (and related issues)

Note : For details on the PTM/HM and ESS hardware

(sensors, readout) I refer to the DCS ESR, May 04!

10.11.2004ECAL - DCS


Overview

ECAL moduleECAL module

crystalcrystal

PCBs for VFE and FEPCBs for VFE and FE

coolingcooling

LV, HV LV, HV

Laser systemLaser system

Offline, DAQOffline, DAQ

Data BasesData Bases

PVSSPVSS

prec. temp. sensor

Monitoring

ESS temp. sensor + WLDESS temp. sensor + WLD

MonitoringMonitoring Safety, PLCSafety, PLCinterlockinterlock

cooling, faults

humidity sensorhumidity sensor

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SM10

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PTM

Precision Temperature Monitoring - PTM

S. Zelepoukine, IHEP Protvino and ETHZ

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PTM

Requirements:

very high precision temp. monitoring : check stability of water cooling system, to stay within 0.02 - 0.05 deg C.

no hardwired feedback to cooling

relative precision : 0.01 deg C

one sensor/module on thermal screen and grid main water IN, main water OUT

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Patch panel

Patch panel

Thermal screen

Grid

Sensor probes location inside SM:

Probes of type 1 (N = 4 + 4) Probes of type 2(N = 2)

Number of probes (per SM): 4 + 4 + 2 = 10Each probe has its own signal cable – twisted pair

M1 M2 M3 M4

PTM : Sensor location

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PTM : Readout - Layout

ELMBELMB

Cur.srcCur.srcPC / PVSSPC / PVSS

ECALUXC55 balcony:

Counting room

20x2 STP cables

CANbus cables

~ 500 sensors(NTC thermistor Betatherm;100K @ 25C; indiv.calibrated;better than 0.01C rel.accuracy)

Readout electronics:ELMB based;ELMB reads voltages andconverts to digital data, thensends data via CANbus.DC-DC converters

DC Power supplies

DC Power supplies

Monitoring application:PVSS based;data storage/archiving,visualization/trending,warnings/alarms.

Network access

Galvanicisolation

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PTM @ H4

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Recent Results

First results from SM10 at H4:

Sensors, sensor probes, read-out practically final

Reading 4 sensors on grid, 3 sensors on thermal screen, and Water IN/OUT

One sensor lost, most likely due to bad intermediate connection inside SM before PP

Since about one week : installed 2 sensors on backplate Above M1 and M4

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Cooling Stability

Zoom

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M4

M3, M2

M1

Grid

Thermal screen

Water - IN

0.01C

0.01C

0.01CM1

M4, M3

Cooling stability = 0.01C (incl. day/night oscillations)

Zoom :

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Just to showuncompressed(in time)data…

10 min

Grid

Thermal screen

Water - IN

AmbientDiv = 1.0C

Div = 0.01C

Div = 0.01C

Div = 0.01C

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M2M2

M1, M3M1, M3

M4M4

M1 M2 M3 M4

28.5 30.6 28.2 25.7

M1 M2 M3 M4

28.5 30.6 28.2 25.7

Inside the electronics compartmentFrom ESS, see later…

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Conclusions on PTM

Cooling stability: Achieved 0.01 C in the long-term, including day/night variations Have a monitoring application, Serguei is working on a more “final”

version…

Temperatures on outer surfaces Recent measurements performed by Serguei Is heating towards outside (or inside, depending on orientation) an issue?

For other detectors? For other SMs ?

As next step, Serguei will move external sensors to lateral surfaces…

Hardware Resolve issue of immersion probes Intermediate connections will not be there any more

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HM

Humidity Monitoring - HM

S. Zelepoukine, IHEP Protvino and ETHZ

10.11.2004ECAL - DCS


Requirements

For HM we want to Measure humidity level inside modules, precision about 5%

Sensors One per module UPS600 from Ohmic Instruments, resistive type, cheap Transducers also from Ohmic Instr,

Readout Same principles as for PTM : ELMB + Canbus to PC

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RH cable shield grounded to SM10

M1, M3, M4

M2 (conn.broken)

Amb1/2 (SM10)

Amb_3 (DCS rack)

RH – inside SM10

RH -- ambient

water out

water in

Water temperatures

Ambienttemperatures

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HM : Conclusions

A complete SM has been equipped with RH sensors and readout (SM10 in H4 testbeam)

Non-calibrated sensors/transmitters were used for SM10 nevertheless acceptable channel to channel variations (2-4 %RH).

The RH readout chain “sensor-transmitter-ADC” is rather sensitive to the grounding of the HM signal cable shield: changing the grounding point can result in an offset for the measured RH value equal to about 10% RH

A detailed lab study is planned for investigating HM grounding issues. Also we would like to make the sensor excitation voltage frequency as low as possible (now = 440 Hz) – this will certainly require to recalibrate all transmitters at the new (lower) frequency.

A humidity generator has been ordered and now delivered. Building a laboratory setup for automated RH sensor/transmitter calibration is in progress now.

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ESS

ECAL Safety System - ESSformerly : TSS (Temperature Safety System)

Belgrade group, ETHZ

See also CMS NOTE 2004-013

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Three interconnected system layers:

• Temperature conversion and channel multiplexing - ESS FE LayerESS FE Layer,• Data acquisition, data processing and interlock generating - ESS PLC LayerESS PLC Layer,• System monitoring and system control - ESS Soft LayerESS Soft Layer;

Schematic layout

RS485

RS485

?

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Sensors : NTC 470 Ohms NTC 470 Ohms thermistors (EPCOS)positioned in pairs at each measurement point ( “Twin” sensors ).

2x twisted pair cableSCEM = 04.21.51.704.4SCEM = 04.21.51.704.4, 2x2x0.05mm2,outside diameter 2.9mm, PETP insulationPETP insulation

ESS : Sensor Location

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Siemens S7- 400 Family PLC System for ESS:

ESS : PLC

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Experience up to now

Excellent performance of ESS

No problem during SM10 running up to now

Interlock tests at the startup were successful

Afterwards, no interlock up to now

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PVSS Monitoring and Control

S. Zelepoukine, P. Milenovic, R. Ofierzynski, F. Beaudette, A. Lister, R. Gomez-Reino, F. GlegeAlso : Thanks to S. Schmeling / JCOP

See also talk by Bobby…

Will also give a detailed presentation at a future JCOP meeting….

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PVSS @H4

Have implemented the monitoring of the following subsystems:

Temperatures from ESS Water Leakage Detection System (via ESS) Temperatures from PTM Humidity (HM) Cooling System (temperatures, flow, pressures) Status of Laser System HV and LV

Not implemented Temperatures from DCUs Storage to ORACLE DB

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PVSS @H4 : Prototype for ECAL

First complete set-up of PVSS DCS system At H4, includes: PTM - HM - ESS - LV - HV - Cooling - Laser + Supervisory system Every application implements a Finite State Machine Based on PVSS II, v.3, and the JCOP framework

Distributed system (Windows XP) on 3 PCs : 1 : Supervisor, Laser, Cooling 2 : HV, LV 3 : PTM, HM, ESS

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PVSS @H4 : Data Logging

For the moment, all data go to the PVSS archive (proprietary)

Not easy to get data out (apart trending, which is ok) not foreseen as final solution (!)

Done because of pressure to get the FSM at H4 etc running

On the long term : ORACLE

A new expert is joining the efforts (Rick Egeland, Minnesota) He will try to help us setting up the commun. with ORACLE and

to develop scripts to easily retrieve data

But not more to say for the moment…..

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Major Issues

During development : Already preparing for the final ECAL application

Some debugging of Framework tools, in particular FSM, was necessary. Thanks to C. Gaspar for her feedback.

Suffered from missing documentation of Framework

Note : The continuous and friendly help by S. Schmeling was absolutely essential !! Thanks!!

HV - LV: Major problems with the connection to CAEN crates See dedicated discussion on this topic

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Supervisory System : 1

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HV Application

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LV Application

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Cooling Application

CommunicationWith coolingSystem via OPC

Note:This applicationonly monitors

user can notoperate the cooling system from here !

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ESS Application

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Conclusions

Hardware PTM / HM / ESS performs according to specs Able to monitor temperature stability to 0.01 C

Software Major efforts gone into development of DCS prototype Achievement more or less our goal Still unresolved : communication problems with CAEN crates

Note : A major effort in terms of man power was needed. This should be a warning for other sub-detectors…..

10.11.2004ECAL - DCS


Other issues…

Switch to ELMB analog DC supply(RH uses a separate 5VDC supply)

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