Welch Allyn Tycos User manual

Manuals

Operator Manual

Service Manual

Aneroid Sphygmomanometers

PN 95P504 Rev A

Copyright 2000

Welch Allyn Inc.			Aneroid Sphygmomanometers Service Manual
Revision A
Revision History
Revision	Section	Date	Author	Description
A	All	8/31/00	JDB	Introduction of Aneroid Service
				Manual

Welch Allyn Inc.

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Welch Allyn Inc.		Aneroid Sphygmomanometers Service Manual
Revision A
Table of Contents
Section 1: General Information .......................................................................................................................			4
1.1	To Service Personnel ............................................................................................................................		4
1.2	Tools and Equipment ............................................................................................................................		5
1.3	Test Specifications ................................................................................................................................		6
1.4	Test Equipment Bench Layout ..............................................................................................................		7
Section 2: Classic Pocket Aneroid Gauges .....................................................................................................			8
2.1	Opening/Removing and Replacing Parts of the Pocket Gauge* ...........................................................		8
2.2	Calibration of the Pocket Gauge ...........................................................................................................		9
2.3	Testing ................................................................................................................................................		11
Section 3: Classic Hand Aneroid Gauge .......................................................................................................			12
3.1	Opening/Removing and Replacing Parts of the Hand Gauge*............................................................		12
3.2	Calibration of the Hand Gauge ...........................................................................................................		13
3.3	Testing ................................................................................................................................................		15
Section 4: Classic Wall and Mobile Aneroid Gauge.....................................................................................			16
4.1	Opening/Removing and Replacing Parts of the Wall and Mobile Gauge.* ........................................		16
7670 series Wall and Mobile Aneroid. .................................................................................................			16
Classic Wall and Mobile Aneroid. ........................................................................................................			16
4.2	Calibration of the Wall and Mobile Gauge .........................................................................................		17
4.3	Testing ................................................................................................................................................		19
Section 5: Economy Aneroid Gauge .............................................................................................................			20
5.1	Opening/Removing and Replacing Parts of the Economy Gauge* .....................................................		20
5.2	Calibration of the Economy Gauge .....................................................................................................		21
5.3	Testing ................................................................................................................................................		23
Section 6: Silver Ring Hand Aneroid...........................................................................................................			24
6.1	Opening/Removing and Replacing Parts of the Silver Ring ...............................................................		24
6.2	Calibration of the Silver Ring Hand Aneroid......................................................................................		25
6.3	Testing of the Silver Ring Hand Aneroid............................................................................................		27
Section 7: Pro Check Hand Aneroid .............................................................................................................			28
7.1	Opening/Removing and Replacing Parts of Pro Check Hand Aneroid ...............................................		28
7.2	Calibration of the Pro Check Hand Aneroid .......................................................................................		29
7.3	Testing of the Pro Check Hand Aneroid .............................................................................................		31
Section 8: Pictures and Replacement Parts ...................................................................................................			32
Section 8.1: Classic Pocket Aneroid Replacement Parts...........................................................................			32
Section 8.2: Classic Hand Aneroid Replacement Parts.............................................................................			33
Section 8.3: 767 Wall/Mobile Aneroid Replacement Parts.......................................................................			34
Section 8.4: Classic Wall/Mobile Aneroid Replacement Parts .................................................................			35
Section 8.5: Economy Aneroid Replacement Parts...................................................................................			36
Section 8.6: Silver Ring Hand Aneroid Replacement Parts ......................................................................			37
Section 8.7: Pro Check Hand Aneroid Replacement Parts........................................................................			38
Section 8.8: Welch Allyn Tycos Movement .............................................................................................			39
Section 8.9: Welch Allyn S+K Movement................................................................................................			40

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

Section 1: General Information

1.1 To Service Personnel

The information contained in this manual is subject to change without notice and should not be construed as commitment by Welch Allyn Inc.

Welch Allyn Inc. assumes no responsibility for any errors that may appear in this manual. If the product and/or its operation varies significantly from any description herein, please contact the

Welch Allyn Inc. Technical Service Center 800-450-9275 [phone]

Fax [phone]

Welch Allyn Inc.

95 Old Shoals Road

Arden, North Carolina 28704

USA

This product has been designed to provide a high degree of safety and reliability. However, Welch Allyn Inc. can not guarantee against: deterioration of components due to aging, normal wear, tampering, and abuse.

Warning: If in the course performing calibration or repair on the gauge the device becomes inoperable and must be sent in to the Welch Allyn Inc. Service Center, The warranty will not be honored and you will be charge for all repairs.

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

1.2 Tools and Equipment

The following is a list of the tools and equipment that is required to do the repair and calibration of the aneroid gauges.

Tool Number	Description
T106845A	Calibration Tool
T105243A	Pointer Removal Tool
T105243B	Pointer Removal Tool
T107345	Span Wrench
T110657	Calibration Dial Adapter, Economy
T105721	Calibration Dial, Pocket and Hand Gauge
T112663	Calibration Dial, Walls and Mobiles
T106763	Calibration Stand (Wall Aneroid)
T112592	Calibration Dial (Silver Ring)
T105258	Wrench (Economy)
T108913	3/8” Open End Wrench
T108897	Movement Removal Wrench
T113265	Thumbscrew Wrench
T110543	Pliers to Grip Lure
T105644	Collet
T55804-1	Pocket Screw Cap Assembly
T108212	Economy Fixture
T107569	Hand Fixture
T74555	Pocket Fixture
T112655	Top Plate Wrench
T113249	Screw Cap Removal Tool
T112927	5/16” Open End Wrench
T112765	¼” Open End Wrench
T34938	Pointer Block
T112511B	Tweezers
T112726	Jewelers Screw Driver
T112595	Calibration Tool (Silver Ring)
“Disytest”	Calibration Dial for Pro Check (Order From S+K)
T112833	Movement Removal Tool (S+K Movement)
T112653	Torque Wrench (S+K movement)
T112653A	Adapter for Torque wrench (S+K Movement)
Test Equipment	Description			Other Tools Needed but
5088-01	Bulb and Valve			Not Provided By Welch Allyn
T112854	500cc Volume			1. Small Hammer
9585TPK4	“T” Fitting			2. 5/8” Socket
9586TPK4	“Y” Fitting			3. ½” Socket
97P24	Pneumatic Tubing (4ft.)			4. ¾” Open End Wrench
200-2000IN	Netech Digital Pressure Meter			5. 9/16” - 24 Thread Tap
“or”				6. ¼” - 40 Thread Tap
2270-01	Setra Digital Pressure Meter.			7. 7/16” - 36 Thread Tap
T111962A	Tension Set Tool
T112459	Torque Screwdriver
T112459A	Torque bit.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

1.3 Test Specifications

The following are the test specification for the Welch Allyn Tycos Aneroid Gauge:

1.The gauge will be accurate to within +/- 3 mmHg* at the following test pressures:

a)0 mmHg (pointer inside the oval/rectangle)

b)60 mmHg

c)150 mmHg

d)200 mmHg

e)300 mmHg

*This accuracy is based on the use of a calibrated digital pressure meter. If using a calibrated aneroid or mercury column for measuring the accuracy of the aneroid in question the resulting accuracy is +/- 6 mmHg.

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

1.4 Test Equipment Bench Layout

500cc Volume		Digital
		Pressure
		Meter

Gauge

Under

Test

Figure 1.5

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

Section 2: Classic Pocket Aneroid Gauges

2.1 Opening/Removing and Replacing Parts of the

Pocket Gauge*

1.Place the pocket gauge into the Pocket Gauge Fixture (T74555).

2.Remove the bezel by unscrewing it from the case and aside. Remove the crystal and aside.

3.Remove the pointer by using the pointer removal tool (T105243A).

4.Pry out the dial by using a small flat head screwdriver.

5.Remove the locking nut using the span wrench (T107345).

6.Remove the screw cap using (T113249) and remove the capsule.

Note: the arm of the movement fits into the top of the capsule.

7.Remove the 2 screws that are holding down the gauge movement using T108897 and remove the movement.

Reassemble in reverse order.

* - See section 8.1 for exploded view drawing for the Pocket Gauge.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

2.2 Calibration of the Pocket Gauge

1.Attach the pneumatic tubing of test equipment to the gauge.

2.Place gauge in to fixture (T74555)

3.Remove bezel, crystal, pointer and dial.

To set the tension:

4.Tighten all screws.

5.View sector gear and ensure proper position (i.e. right edge of sector gear should align with mark on base of movement).

6.If sector gear not aligned properly, loosen the capsule nut using a 3/8” wrench and adjust the sector gear by turning the capsule until sector gear is in correct position per step 5. Tighten capsule nut.

7.Loosen sector stop lug and pull toward bottom of gauge.

8.Using your left index finger, push the sector gear all the way to the post and hold that in position.

9.Place tension setting tool (T119628) onto pinion at the 9 o’clock position.

10.Rotate tool clock wise to the 3 o’clock position.

11.Release sector gear and continue rotation to the 6 o’clock position sector gear should be moving during this step).

12.Bring lug back to correct position and lock into place.

To set the span:

13.Place Test Dial onto gauge. Place pointer onto pinion. Rotate dial until pointer is at “0” at the bottom of the gauge.

14.Apply 320 mmHg to the Gauge.

15.Release pressure to 300 mmHg to the gauge.

16.If point is less than 300, Place the calibration tool (T106854A) into the radius plate in slot above screw. Pull calibration tool toward bottom of gauge moving the sector gear upward until pointer reached “300.” Release pressure and check “0” point.

17.If point is greater than 300, Using the calibration tool (T106845A) positioned between the sector gear and radius plate on the left of the movement, rotate the tool clock wise until pointer is at “300” (this brings the radius plate down). Release pressure and check “0” point.

18.If not at “0” upon release of pressure, rotate test dial until pointer is on the “0” mark of test dial and re-apply 300 mmHg. Repeat steps 14-17 until span is

set.

19.Check for leak by pinching off the tubing from the test equipment while pressure is on the gauge. There should be no visible leak.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

Check and finish calibration:

20.Remove the pointer and test dial, replace the gauge’s dial.

21.Place pointer onto pinion and resting in center of oval. Tap pointer with small hammer slightly to secure.

22.Apply 320 mmHg to the gauge.

23.Release pressure to 300 mmHg and take readings here and at given points (see section 1.3).

24.If pointer is greater than 300, pull pointer until you feel slight resistance counter-clock wise, tap pointer with small hammer and recheck. Make sure pointer returns to the oval each time. Repeat until satisfied.

25.If less than 300, rotate pointer 1 complete revolution clockwise until resistance is felt. Push pointer a little farther and tap pointer with small hammer and recheck. Make sure pointer returns to the oval each time.

Repeat until satisfied.

26.Place crystal and bezel back onto gauge and check.

Please see Section 8.8 for a drawing of the Welch Allyn Tycos Movement.

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

2.3 Testing

1.Hook up the Pocket Gauge that needs to be tested to the pneumatic tubing of the test equipment.

2.Apply 320 mmHg to the gauges.

3.Release the pressure to 300 mmHg on the digital pressure meter, or a calibrated aneroid or mercury gauge. Note: The aneroid or mercury gauge must be accurate to +/- 3 mmHg at the stated target pressures using a calibrated digital pressure meter. If using a calibrated aneroid or mercury column the accuracy must be +/- 6 mmHg.

4.Check reading of the pressure meter or gauge to that of the Pocket Gauge under test. Refer to section 1.3 for specifications.

Welch Allyn Inc.

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Welch Allyn Inc.	Aneroid Sphygmomanometers Service Manual
Revision A

Section 3: Classic Hand Aneroid Gauge

3.1 Opening/Removing and Replacing Parts of the Hand

Gauge*

1.Pull bulb off of valve body (48S95).

2.Place the Hand Gauge into the Hand Gauge Fixture (T107569).

3.Remove the bezel by unscrewing it from the case and aside. Remove the crystal and aside.

4.Remove the pointer by using the pointer removal tool (T105243A).

5.Pry out the dial by using a small flat head screwdriver.

6.Remove the cover of the Hand Gauge by unscrewing the two screws (9P2651) with a Phillips head screwdriver.

7.Loosen the locking nut (32P527) from the capsule and remove both from the case.

8.Remove the 9P1799 screws from the case and movement and remove the movement from the case.

9.Remove the Thumbscrew by using tool # T113265 (Thumbscrew wrench) and turning the thumbscrew counter-clock wise.

10.Remove the Thumbscrew valve body (42P252) using a 5/8” socket.

11.Remove the valve body (48S95) from the case using a 1/2” socket.

Reassemble in reverse order

* - See section 8.2 for an exploded view drawing of the Hand Gauge.

Welch Allyn Inc.

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