Siemens Simomed HC User manual

Page 1
Rehm
SIMOMED HC
Adjustment
SIMOMED
AX
Adjustment SIMOMED
0564239710140721
Print No.: Replaces: AX52-060.842.01.01.02
AX52-060.842.01.02.02
© Siemens AG
The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.
English Doc. Gen. Date: 05.03
1998
Page 2

2 Revision / Disclaimer

1Revision / Disclaimer
Document revision level
The document corresponds to the version/revision level effective at the time of system delivery. Revisions to hardcopy documentation are not automatically distributed.
Please contact your local Siemens office to order current revision levels.
Disclaimer
The installation and service of equipment described herein is to be performed by qualified personnel who are employed by Siemens or one of its affiliates or who are otherwise authorized by Siemens or one of its affiliates to provide such services.
Assemblers and other persons who are not employed by or otherwise directly affiliated with or authorized by Siemens or one of its affiliates are directed to contact one of the local offices of Siemens or one of its affiliates before attempting installation or service pro­cedures.
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Medical Solutions
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Setup and Adjustments 3

2Setup and Adjustments

General Remarks 0

Safety Information 0

The DHHS regulations have been met by this monitor under the following circumstances:
No components may be replaced inside the monitor.
Exception: when a modification or upgrade is initiated by Med. Adjustments are made via the service software or the front keys only.
110/230 V are present inside even if the power switch is OFF.

General Information 0

The Simomed HC is a 17" b/w landscape multisync monitor for progressive video scan­ning. The unit receives the video and synch information via three BNC connectors located at the rear.
The front keys are locked. The unlock is handled by the service software.
If there is a malfunction, the monitor is completely replaced.

Tools, auxiliary device and tests 0

Laptop with Windows interface (3.1 or compatible version).
Serial interface cable (0- modem cable)
According to AR TD Part 3, Part Number 99 00 440 RE999.
For some modalities, the monitor multi-norm testbox is required to perform adjust-
ments. (per AR TD Part 3, Part Number 97 16 754 Y4905.)
Mavo monitor (Part Number 97 16 754) or Luminance Spotmeter (Germany only).

Installing the monitor 0

Unpack the monitor and check for physical damage.
Place the monitor in a position where no lights, windows, furnishings with a shiny sur-
face or bright walls can be reflected onto the screen.
If the monitor is brought in from a cold environment, condensation may occur inside the
unit. Do not switch on immediately, wait a brief period.
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4 Setup and Adjustments
BAS connect ion

Connect Video and Power 0

Connect the video cable to the labeled video BNC socket. With separate sync signals
similar to ACOM.PC, connect the H-sync and V-sync cables accordingly.
Connect the power cable. For a PC-based system, connect the monitor to the PC pow-
er outlet.
Connect the ground cable at the designated terminal (this does not apply for PC-based
systems such as ACOM.PC).
V
H/( H+V )
Main s conne ct ion
Fig. 1:
VIDEO
Use clamps to stress-relieve of cables.
The cables can be run through the monitor base.
Fig. 2:
Switch on the monitor by using the power switch (front right).
The green LED should go on. The yellow LED lights up if the video signal is missing!
The monitor automatically recognizes the video timing being used, and sets the prepro­grammed values.
Depending on the graphics controller and the current position of use, it may still be neces­sary to readjust the geometry according to the video timing.
NOTE
PC-based systems (e.g. ACOM.PC) might have a video standard which is not preprogrammed at the monitor. The check of geome­try, focus, brightness and contrast is mandatory.

Installation of the service software and connection 0

1. Connect the 0-modem cable between PC and Monitor. The serial interface connector is found behind the front lid.
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Setup and Adjustments 5
2. Insert the supplied service diskette in the disk drive.
3. Select drive A in the Windows file manager.
4. Double-click on the SETUP.EXE file to start the program; the installation routine will in­stall the service software to PC.
5. Follow the on-screen instructions.
6. Start the application by double clicking the relevant icon.
7. The actual parameters of the monitor are downloaded (polled) automatically.
NOTE
For the latest information, check the README.TXT file.

Lock and unlock of front keys 0

Press the >Disable/Enable Front Keys< softkey button in the service platfor.
Alternatively:
1. By simultaneous pressing SHIFT- CTRL(STRG) - U : Front keys are unlocked.
2. By simultaneous pressing SHIFT - CTRL(STRG) - L : Front keys are locked.
NOTE
Lock the front keys again once the installation or service is fin­ished.
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6 Setup and Adjustments

Basic adjustments using the front keys 0

The following adjustments are done without the Service PC unless the front keys are unlocked.
Adjust by pressing the brightness key.
Fig. 3:
Adjust by pressing the contrast key.
Fig. 4:
NOTE
For adjustment, refer to Luminance calibration.
Press the "Wrench symbol key t " for approx. 1 s to access the adjustment mode. The on screen display then appears which represents the function to be set. Continue press­ing the keys to cycle through the different functions.
Fig. 5:
The settings are changed using the contrast keys. Brief taps of the respective key changes the value by one step. If the key is kept pressed, the value is adjusted continu­ously.
After 10s inactivity, the monitor automatically switches back to normal operation and saves the set values.
Adjustment
Contrast - Contrast +
function
Horizontal Size
Fig. 6:
Fig. 7:
Horizontal Center
Fig. 8: Fig. 9:
Vertical Size
Fig. 10:
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Fig. 11:
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Setup and Adjustments 7
Adjustment function
Vertical Center
ROTATE
PIN
BOW
Contrast - Contrast +
Fig. 12: Fig. 13:
Fig. 14:
Fig. 16:
Fig. 18:
Fig. 15:
Fig. 17:
Fig. 19:
TRAP
SKEW
NOTE
Fig. 20:
Fig. 22:
Fig. 21:
Fig. 23:
The monitor has been exactly adjusted in the factory using an au­tomatic high-performance image processing system. Many of these optimized settings cannot be observed without an appropri­ate test image and without a trained eye; therefore only modify them if required.
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8 Setup and Adjustments

Basic geometry adjustments with the PC 0

Select the desired adjustment with the mouse pointer and adjust values with the corre­sponding slider.
Fig. 24:
Press SAVE to store the values in the non-volatile memory of the monitor.
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Setup and Adjustments 9

Special adjustments with the PC 0

Select the SPECIAL soft key button. Type in the password >*********< .
For the password, see the password list on the Intranet (same as SIMOMED HM).
Fig. 25:
Additional functions for focus and luminance are available. Select the desired adjustment using the mouse pointer and adjust the values with the corresponding slider.
To adjust focus use preferably a dotted test image. Use the corresponding slider for the various focus positions on the screen. Adjust to maximum sharpness.
For luminance calibration, follow the enclosed instructions.
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10 Setup and Adjustments

Luminance calibration 0

For image acceptance of a CRT (Cathode Ray Tube, Monitor), there are two things impor­tant for medical diagnostics:
1. defined contrast between the grey steps (the optimum is a perceptual linearity)
2. the same subjective impression of a medical image on different modalities, monitors and cameras.

Prerequisites 0

1. Only use calibrated luminance measuring instruments.
2. The screen must be cleaned before measurement.
3. Check environmental brightness: Turn off the monitor. Measure the luminance at the surface of the monitor, emitted from the surrounding light sources. The luminance must be less than 0.10 cd/m duced, cover the CRT with a dark cloth during the measurement in black or add the measured luminance level to each of the reference value.
2
. Otherwise reduce the room light. If the room light can‘t be re-
4. The monitor must be switched on for at least 30 minutes before start of adjustment.
5. Use the test image with 10% center field (IQAP) or a grey scale test pattern of the par­ticular digital system (preferably the SMPTE test image). If a digital test image is not available use the Monitor Multinorm Test Box.
6. Keep same measurement position on screen during all measurements!
7. Pay attention to correct (default) window and center values.
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Setup and Adjustments 11
8. For use on PC systems (e.g. ACOM PC).
To avoid burn-in effects of “white” windows, the desktop settings should be adapted as follows:
Prerequisites: Right-click on the Desktop and select Properties. The following dialog box will appear. Set the background color for the activated window to gray (see arrow).
Fig. 26:
NOTE
If a S/W test image is not available, a black or white image can be generated with the ACOM PC as follows.
Load a patient scene with “file open”.
White image: Set the slider for Windowing to:
WT = 1 and WB = 0.
Black image: Set the slider for Windowing to
WT = 255 and WB = 254
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12 Setup and Adjustments

Adjustment 0

Fig. 27:
After finishing the calibration, press SAVE to store the values in the non-volatile memory of the monitor.
NOTE
By pressing the UNDO ALL CHANGES soft key, the latest changes will be cancelled.
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Setup and Adjustments 13

Adjustment Procedure 0

NOTE
The adjustment sequence must be observed. If the “wrong” con­troller is changed, it is necessary to “start over”!
Pre-setting:
=> min. means to the left stop (minimum value).
=> max. means to the right stop (maximum value).
The white measuring field (100% white) should be approx. 10% of the screen area.
A cover cloth must be used for the measurements (scattered light).
Tab. 1 Adjustment
Slider pre-setting! Adjuster Measurement values with the Mavo
monitor.
Brightness at min.
Contrast at min.
Bright Min.
Adjust to 0.2 cd/m, - 0 / + 0.1 cd/m in the black area.
ContMin / BrtMin at min.
Brightness at max.
Contrast at min.
ContMin / BrtMax at min.
Bright Max.
Background brightness.
Adjust to 3.0, +/- 0.3cd/m in the black area.
Brightness at min.
Contrast at min.
Brightness at min.
Contrast at max.
Brightness at max.
Contrast at min.
Brightness at max.
Contrast at max.
ContMin / BrtMin
ContMax / BrtMin
ContMin / BrtMax
ContMax / BrtMax
=> Using the SMPTE test pattern: Adjust so that the white measuring field is still just visible.
=> Without the SMPTE: Adjust so that the image contents (100% white) to the postblanking circuit is still just visi­ble.
This corresponds to 0.2 cd/m to 0.3 cd/m in the white measuring field.
Adjust the brightness in the white measuring field to
200 cd/m, +/-5 cd/m.
Adjust the brightness in the white measuring field to 3.2 cd/m, -0/+ 0.1 cd/m (the white measuring field must just be detectable).
Adjust the brightness in the white measuring field to 250, +/- 5cd/m.
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14 Setup and Adjustments
Slider pre-setting! Adjuster Measurement values with the Mavo
monitor.
Brightness at max.
Brightness
Contrast at min.
Contrast at max. Contrast
Adjust the brightness in the black measuring field to 0.6, +/- 0.15 cd/m.
A value of 210, +/- 10 cd/m must result in the white measuring field or it must be possible to set this value with the contrast slider.
If this value is not reached, the entire adjustment must be repeated or the picture tube is worn out!
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Setup and Adjustments 15

Cleaning and preventive maintenance 0

Always use a damp AND NOT WET cloth.
To clean the screen, apply a household glass cleaner to a cloth and wipe the screen.
Do not use solvents or abrasives. It might discolor the housing and affect the anti-glare
treatment off the screen.
Check annually geometry and focus.
To compensate the ageing effect of the monitor CRT, check annually the luminance
values and calibrate if required.
Check and record the working hours by pressing the corresponding key.
Fig. 28:

Information sources and support services 0

Check README.TXT, found on the delivered service software, with a standard editor
for additional help.
For service problems, call your support center.
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16 Setup and Adjustments

Changes to Previous Version 0

Adjustment procedure changed.
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