Shekel Scale Service Instruction Rev A

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Service Instruction

Shekel Scale Service Instructions Important The information contained in this service document pertains only to those models of products which are marketed by Ohmeda Medical as of the effective date of this document or the latest revision thereof. This service document was prepared for exclusive use by Ohmeda Medical service personnel in light of their training and experience as well as the availability to them of parts, proper tools and test equipment. Consequently, Ohmeda Medical provides this service document to its customers purely as a business convenience and for the customer’s general information only without warranty of the results with respect to any application of such information. Furthermore, because of the wide variety of circumstances under which maintenance and repair activities may be performed and the unique nature of each individual’s own experience, capacity, and qualifications, the fact that a customer has received such information from Ohmeda Medical does not imply in any way that Ohmeda Medical deems said individual to be qualified to perform any such maintenance or repair service. Moreover, it should not be assumed that every acceptable test and safety procedure or method, precaution, tool, equipment or device is referred to within, or that abnormal or unusual circumstances, may not warrant or suggest different or additional procedures or requirements. This document is subject to periodic review, update and revision. Customers are cautioned to obtain and consult the latest revision before undertaking any service of the equipment.

SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION An Electrostatic Discharge (ESD) Susceptibility symbol is displayed to alert service personnel that the part(s) are sensitive to electrostatic discharge and that static control procedures must be used to prevent damage to the equipment.

Technical Competence The procedures described in this service document should be performed by trained and authorized personnel only. Maintenance should only be undertaken by competent individuals who have a general knowledge of and experience with devices of this nature. No repairs should ever be undertaken or attempted by anyone not having such qualifications. Genuine replacement parts manufactured or sold by Ohmeda must be used for all repairs. Read completely through each step in every procedure before starting the procedure; any exceptions may result in a failure to properly and safely complete the attempted procedure.

Service Instruction

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Precautions Caution: Only competent individuals trained in the repair of this type of equipment should attempt to service it as detailed in this manual. Caution: Always perform the checkout procedure after performing any type of repair and before placing the scale back in service.

Specifications Functional range 300gm to 8 kg Accuracy +/- 10gm Resolution 10gm (factory setting) or 5gm user selectable on non-EU scales The resolution of scales distributed in the EU region vary depending on the scale revision: • • •

Scales with revision 2.72 only have a resolution option of 10 g. Scales with revision 2.86 have a resolution of 5 g up to 5000 g and 10 g up to 8000 g. The resolution on EU scales with software 2.86 and above is not user selectable.

Checkout Procedures The scale can be calibrated using a Class F calibration weight between 1 kilogram and 8 kilograms (accuracy of 0.01%). It is recommended to perform weight testing of the scale with a 5 kilogram (5000 gram) certified test weight. This weight is available as Ohmeda part number 6600-0209-800.

Mechanical check 1.

Examine the scale connector cord for damage. Examine the LEMO connector to make sure it is tightly assembled. Check for bent pins. If any of the parts are damaged replace them.

2.

2. Examine the scale for obvious signs of damage.

3.

3. Ensure there is no mechanical binding between the scale and unit.

Center weight check For best test accuracy enter the service screen and set the scale resolution to 5 grams, then shut off the unit and power it back up to enter normal weighing mode. Place a known weight in the center of the mattress and perform a weigh cycle. The displayed weight should be the known weight +/- 10 grams.

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Service Instruction

Off center weight check For best test accuracy enter the service screen and set the scale resolution to 5 grams, then shut off the unit and power it back up to enter normal weighing mode. Place a known test weight 10 cm (4”) from the center of the mattress in 4 positions 90 degrees from each other (for example- toward each corner of the mattress) and check the reading at each position. Resulting weight readings should be within +/- 10 grams of previously obtained center weight reading. Note:

Important: If the scale fails the weight checks, calibrate it according the procedure in section 3 and then perform the weight checks again.

Maintenance and Calibration Maintenance Schedule Annual: Perform checkout procedures in section 2. If the scales fail the weight check, perform the calibration procedure below.

Service Tools Note:

The scale can be calibrated using a Class F calibration weight between 1 kilogram and 8 kilograms (accuracy of 0.01%).

A 5 kilogram (5000 gram) certified test weight is available from Ohmeda Medical (part number 6600-0209-800).

Scale Calibration Note:

For EU Member States, this scale has been designed and manufactured in accordance with the non-automatic weighing instruments (NAWI) directive, 2009/23/EC. In order to assure complete compliance to the Directive, have the unit calibrated by an accredited local test authority. If you are unable to identify a test authority, please contact your GE representative or distributor for assistance.

Periodic re-verification (calibration) of the scale must be performed in accordance of the National Regulations Governing Legal Metrology. The required re-verification frequency will vary by country. Contact your local weights and measures authority for more information. On Giraffe Incubators and Omnibeds:

Service Instruction

1.

Clear all objects from the bed and ensure only the mattress and Plexiglas remain on the scale.

2.

Ensure the bed is level.

3.

Place the test weight on the center of the scale.

4.

Hold the override key (>37) while powering up to enter the service screen on a Giraffe

5.

On the second service screen, select Cal Scale.

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6.

Remove the weight and push the knob at the screen prompt “REMOVE THE WEIGHT AND PUSH KNOB”. The screen will prompt “INITIALIZING...” for a few seconds.

7.

Replace the weight and push the knob at the screen prompt “PLACE TEST WEIGHT AND PUSH KNOB”. The screen will prompt “MEASURING ...” for a few seconds

8.

When the screen prompts “ENTER TEST WEIGHT” Dial in the test weight to the nearest gram. Press the knob to enter. The screen will prompt “CALCULATING.” for a few seconds.

9.

When the screen prompts: SAVE AND EXIT EXIT ONLY RESTORE DEFAULT Select and enter “SAVE AND EXIT”.

10. Power cycle the unit to exit service mode and enter operation mode. 11. Verify the accuracy of the scale by performing a weighing cycle using the test weight. The measured value should be the test weight +/- 10 grams. On Giraffe and Panda Warmers 1.

Clear all objects from the bed and ensure only the mattress and Plexiglas remain on the scale.

2.

Ensure the bed is level.

3.

Enter service menu turn on the unit by holding the Help and Alarm Silence keys until you hear two tones (approximately 5 seconds) and release.

4.

On the Main Menu select “Scale Calibration”, then select “Manual Calibration”.

5.

Use the UP/DOWN arrow keys to set the gram value of the known test weight and press the enter key.

6.

When prompted, clear all objects from the bed.

7.

Press the Start Key, “Scale Obtaining Tare” will be displayed.

8.

When “Apply Test Weight” is displayed, place the weight on the center of the bed and press the OK key.

9.

If calibration is successful “Calibration Successful” is displayed. If not press the Recal key and repeat the procedure.

10. Press the Save key to save the new Calibration Constants or the Abort key to retain the original setting. 11. Power cycle the unit to exit service mode and enter operation mode. 12. Verify the accuracy of the scale by performing a weighing cycle using the test weight. The measured value should be the test weight +/- 10 grams.

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Service Instruction

Troubleshooting Error Codes Error Code

Definition

Action

Scale Failure “1”

Microcomputer random access memory failed test on power up.

Replace the Control PCA

Scale Failure “2”

Microcomputer program memory failed checksum test on power up.

Replace the Control PCA

Scale Failure “3”

No output data from A/D converter.

Replace the Control PCA

Scale Failure “4”

Output signal from A/D converter is over range.

Remove all items from platform and remove the top and circuit board cover to access J2 and J3 . Proceed to service mode and check the value of SC. Unplug one load cell at either J2 or J3 and see if the SC value returns to normal. If its suspected that a load cell is faulty, swap their connectors on the control board to verify that the problem follows the load cell. IF unplugging or swapping the load cells doesn’t fix the issue, replace the control board.

Scale Failure “5”

EEPROM memory has failed.

Replace the Control PCA

Scale Failure “6”

Field Calibration data has been lost.

Perform scale calibration. If problem persists replace the Control PCA.

Scale Failure “1”

Microcomputer random access memory failed test on power up.

Replace the Control PCA

Troubleshooting Table Problem

Possible cause

Action

Scale Icon does not appear on unit control panel

Scale not plugged in.

Plug scale into Giraffe receptacle.

Defective cable.

Check cable continuity. Repair or replace cable.

Defective printed circuit board.

Replace printed circuit board.

Scale receptacle on unit defective.

Replace scale receptacle on unit.

Scale causes unit malfunction

Defective cable

Repair or replace cable.

Defective printed circuit board.

Replace printed circuit board.

Scale icon disappears/ reappears on control panel. Scale makes repeated clicking noise.

Defective cable.

Check that connector is fully inserted.

Defective printed circuit board.

Check that LEMO connector is tightly assembled. Check for bent pins.

Service Instruction

Scale receptacle on unit defective

Check cable continuity. Repair or replace cable. Replace printed circuit board. Replace scale receptacle on unit.

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Problem

Possible cause

Action

Scale never completes weighing cycle

External mechanical interference.

weighing (patient tubing, wires, severe vibration). Place scale outside of unit and check operation.

Internal mechanical interference. Defective load cell. Defective printed circuit board.

Remove scale top frame and check for interference between top frame, load cells and wiring. Check output of scale using service screen. Check “SR” (Scale counts Raw) display. Number displayed should not fluctuate by more than 4 counts when at rest. If excessive fluctuation is noted disconnect load cells one at a time to isolate; replace individual defective load cell. Replace printed circuit board.

inconsistent, erratic

Mechanical interference Defective load cell Defective printed circuit board.

Perform off center weight check to determine corner weight readings. Examine defective corner and correct interference. Perform checkout procedure. If it fails, perform load cell check below. Replace load cell as needed. Replace printed circuit board.

Service Screen To access the service screen please refer to the following documents as appropriate: • • •

Panda® iRes and Giraffe® Warmers Service Manual M1128921. Giraffe® Incubator Service Manual 6600-0847-801 (USA) 6600-0847-802 (INTL). Giraffe® OmniBed Service Manual 6600-0834-801 (USA) 6600-0834-802 (INTL).

SR and SC display Two displays of internal scale operation are provided in the service menu. These are labeled “SR” and “SC”. SR (Scale counts raw): On EU scales, the SR value is a non-resettable count of how many times the scale has been calibrated. The value of SR increments by one whenever the scale is calibrated. In non-EU scales, the SR (Scale Raw counts) represents the actual digital converted weight number received from scale’s A/D converter without any further processing. The value of SR displayed without a weight, Plexiglas, and mattress will vary greatly, due to the tolerance of the transducers and electronics. With a stable weight on the bed, the SR value should not fluctuate more than a few counts. SC (Scale counts corrected): Scale counts Calibrated. This is the weight value after processing from the scale’s internal microcomputer. It can be thought of as the “software” value representing the weight applied to the scale. On a properly calibrated scale, each count of this value represents exactly 1 gram of weight.

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Service Instruction

Repair Procedures No special procedures are required to disassemble and re-assemble the scale. Please refer to illustrated parts for exploded views to assist with repairs.

Service Instruction

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Illustrated Parts Giraffe Scale Service Parts

ITEM

PART NUMBER

DESCRIPTION

I 2 3 4 5 6 7

M1131119 M1131120 M1131131 M1131133 M1131123 2068227-001 M1131130 2068225-001 2070929-001

GIRAFFE SCALE TOP TRAY SHOCK ABSORBER KIT IN BED SCALE LOAD CELL KIT IN BED SCALE HARDWARE KIT COVER CIRCUIT BOARD CABLE KIT BUBBLE LEVEL CONTROL BOARD FOR NON-NAWI SCALES CONTROL BOARD FOR NAWI SCALES

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Service Instruction

Panda Scale Service Parts

ITEM

PART NUMBER

DESCRIPTION

I 2 3 4 5 6 7

M1131132 M1131120 M1131131 M1131133 M1131123 2068226-001 M1131130 2068225-001 2070929-001

PANDA SCALE TOP TRAY SHOCK ABSORBER KIT IN BED SCALE LOAD CELL KIT IN BED SCALE HARDWARE KIT COVER CIRCUIT BOARD CABLE KIT BUBBLE LEVEL CONTROL BOARD FOR NON-NAWI SCALES CONTROL BOARD FOR NAWI SCALES

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Service Instruction

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Complete Scale Part number List Giraffe IN-BED Scale EU Gravity Zone 1 ... M1147621 Giraffe IN-BED Scale EU Gravity Zone 2 ... M1147623 Giraffe IN-BED Scale EU Gravity Zone 3 ... M1147624 Giraffe IN-BED Scale EU Gravity Zone 4 ... M1147625 Giraffe IN-BED Scale EU Gravity Zone 5 ... M1147626 Giraffe IN-BED Scale EU Gravity Zone 6 ... M1147628 Giraffe IN-BED Scale EU Gravity Zone 7 ... M1147629 Giraffe IN-BED Scale EU Gravity Zone 8 ... M1147630 Giraffe IN-BED Scale EU Gravity Zone 9 ... M1147631 Giraffe IN-BED Scale EU Gravity Zone 10 ... .M1147632 Giraffe IN-BED Scale EU Gravity Zone 11 ... M1147633 Giraffe IN-BED Scale EU Gravity Zone 12 ... M1147634 Giraffe IN-BED Scale EU Gravity Zone 13 ... M1147635 Giraffe IN-BED Scale EU Gravity Zone 14 ... M1147636 Giraffe IN-BED Scale EU Gravity Zone 15 ... M1147637 Giraffe IN-BED Scale EU Gravity Zone 16 ... M1147638 Giraffe IN-BED SCALE None EU... M1125056 Panda IN-BED Scale EU Gravity Zone 1 ... M1147670 Panda IN-BED Scale EU Gravity Zone 2 ... M1147687 Panda IN-BED Scale EU Gravity Zone 3 ... M1147688 Panda IN-BED Scale EU Gravity Zone 4 ... M1147689 Panda IN-BED Scale EU Gravity Zone 5... M1147690 Panda IN-BED Scale EU Gravity Zone 6 ... M1147691 Panda IN-BED Scale EU Gravity Zone 7... M1147692 Panda IN-BED Scale EU Gravity Zone 8... M1147693 Panda IN-BED Scale EU Gravity Zone 9... M1147694 Panda IN-BED Scale EU Gravity Zone 10 ... M1147695 Panda IN-BED Scale EU Gravity Zone 11 ... M1147696 Panda IN-BED Scale EU Gravity Zone 12 ... M1147697 Panda IN-BED Scale EU Gravity Zone 13 ... M1147698 Panda IN-BED Scale EU Gravity Zone 14 ... M1147699 Panda IN-BED Scale EU Gravity Zone 15 ... M1147700 Panda IN-BED Scale EU Gravity Zone 16 ... M1147701 Panda IN-BED Scale None EU... M1125055

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Service Instruction