Welch Allyn 9600 Bedienungsanleitung

Operation Manual

Calibration Tester

Model 9600

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Service Manuals

WelchAllyn9600CalibrationTester

Calibration Tester

Model 9600

OperationManual

CONTENTS

INTRODUCTION ................................................................................4

WHATTHE 9600 CALIBRATION SYSTEM IS ........................................ 4

WHATTHE 9600 CALIBRATION SYSTEMDOES ................................. 4

MAJOR COMPONENTSOF THE9600 ..............................................5

TEMPERATURESELECT SWITCH ...................................................... 5

POWERINDICATOR ............................................................................. 5

READYINDICATOR............................................................................... 5

OVER-TEMPERATUREDETECTOR..................................................... 6

THERMOMETERHOLES ...................................................................... 6

USINGTHE9600 SYSTEM................................................................7

SETUP PROCEDURE........................................................................... 7

LEVEL1 CALIBRATIONTEST ..........................................................7

THE MODEL 9000 THERMOMETER .................................................... 8

THERMISTORTHERMOMETERS......................................................... 9

CELSIUS-ONLYTHERMISTORTHERMOMETERS.............................. 9

LEVEL2 CALIBRATIONTEST ........................................................10

LEVEL 2CALIBRATIONTEST ............................................................. 10

TROUBLESHOOTING ..................................................................... 11

MODEL 9600 CALIBRATION CHECKS................................................11

ENVIRONMENTALCHECKS............................................................... 12

MODEL9000 CALIBRATIONADJUSTMENT ..................................12

PRIORTOCALIBRATIONADJUSTMENT ........................................... 13

ESTABLISHINGA BASELINE PRIORTOMAKING

CALIBRATIONADJUSTMENTS ........................................................... 13

SETTINGTHE THERMOMETER TOTHE

CALIBRATIONADJUSTMENTMODE .................................................. 14

SPECIFICATIONS ...........................................................................15

LIMITEDWARRANTY......................................................................16

INTRODUCTION

WHAT THE 9600 CALIBRATION SYSTEM IS

The 9600 Calibration Tester is a device for testing the calibration of

Welch Allyn thermometers. The unit contains solid-state circuitry for long-

term stability, with virtually no maintenance.

The 9600 System provides a convenient “reference patient” for testing the

calibrationof:

nThermistor-based thermometers (for example, Models 500, 600,

650, 678, 679, 767T, SureTemp® and SureTemp4®).

nInfrared-technology Model 9000 and Model 9020 Welch Allyn

thermometers.

To maintain long-term stability, as well as to ensure strict control over

varying environmental conditions, only the highest precision components

are used in the construction of the 9600 System. For this reason, the

instrument must be factory calibrated on a regular basis. The initial calibra-

tion, if performed within the warranty period, is free of charge. Please

contact your Welch Allyn Customer Service representative at (800) 854-

2904 for further information.

WHAT THE 9600 CALIBRATION SYSTEM DOES

The 9600 Calibration Tester provides a tightly regulated temperature source

that is compatible with all Welch Allyn thermometer products. The device’s

“temperature” can be taken with the knowledge and assurance that precise

readings will be obtained as the unit is factory calibrated to very close

tolerances. User adjustments are not required or recommended.

With the 9600 System, the difficult and time-consuming setup, precision

calibration, and maintenance requirements of water baths and other general

purpose equipment, such as ovens and environmental chambers, is elimi-

nated.

WelchAllyn9600CalibrationTester

MAJOR COMPONENTS OF THE 9600

TEMPERATURE SELECT SWITCH

The Temperature Select Switch and the POWER and READY Indicators are

located on the front of the Main Unit. Whenever the unit is plugged into a

standard wall outlet, the POWER indicator will illuminate. There is no

power ON/OFF switch. The READY indicator will only illuminate when the

temperature stabilizes at the temperature you have selected on the Tempera-

ture Select Switch.

NOTE: For specific operational details about the components of the 9600

Calibration Tester, see the Specifications Section at the end of this manual.

POWER INDICATOR

When unpacking the 9600 Calibration Tester, notice that the Power Module

is permanently connected to the Main Unit. This is to assure a continuous

power supply to the unit, since intermittent power would cause the unit to

lose temperature control and would turn off the READY Indicator.

After the 9600 warms up, the unit will draw about 7 watts of power from a

standard wall outlet; therefore, it may be left on continuously. However, if

the unit will not be used for long periods of time, it may be unplugged.

READY INDICATOR

The 9600 Calibration Tester contains an independent temperature sensing

circuit that senses temperature changes more precisely than the thermom-

eters it tests.

Because the unit contains this independent circuitry, a failure in the tempera-

ture-control circuit will not alter its “READY-sensing” ability. It is virtually

impossible for the READY indicator to illuminate if the temperature is

incorrect.

NOTE: Do not use the unit if the READY indicator is not illuminated. If the 9600

does not show “Ready” within a few minutes of the time allowed in the

Specifications Section of this manual, and the environment is within acceptable

operating conditions, the unit is malfunctioning and should be returned to the

factory for repair or replacement.

OperationManual

OVER-TEMPERATURE DETECTOR

In addition to the READY Indicator, the 9600 Calibration Tester contains an

“Over-Temperature Detector.” This is a fail-safe feature that protects the

unit against over-temperature conditions, in the unlikely event that a failure

should occur in the temperature-control circuitry. The over temperature

control circuit overrides the normal control circuit, and holds the tempera-

ture slightly above the set point.

If a failure were to occur in the circuitry and it caused the unit to keep

heating indefinitely, the Over-Temperature Detector would activate as soon

as the temperature rose a few tenths of a degree above the set point. If this

were to happen, the READY indicator would not illuminate, thereby alerting

the user that the unit should not be used.

THERMOMETER HOLES

The internal “blackbody” of the 9600 Calibration Tester acts as a heat

reservoir for the thermistor probe and as a heat radiator for the infrared-

sensing aural thermometer.

The large hole under the flap in the top of the Main Unit is for Model 9000

infrared (IR) Aural thermometers and the small hole is for thermistor-based

thermometers. For proper positioning of the thermometers in these holes,

see the following section, “Using the 9600 System.”

The surface texture inside the large hole must be flat (dull) and dry for

proper IR readings. This hole should be black; you should only be able to

see its surface under bright light. The small hole, which is not painted black,

must be kept clean and dry.

The coating in this part of the unit is fragile, so please follow the cleaning

instructions carefully. The surface of the unit should not be touched, nor

should any foreign objects be inserted into the unit. It also is important to

avoid spilling liquids onto the unit, even though it has a dust cover. If liquid

or other contaminants are allowed to enter the unit, proper calibration

cannot be assured.

WelchAllyn9600CalibrationTester

USING THE 9600 SYSTEM

SETUP PROCEDURE

The 9600 Calibration Tester takes about 20 minutes to cool from its high

setting to its low setting. When testing several thermometers at both

temperatures, first test the units on the cool setting. Then switch settings,

wait for the READY indicator to illuminate, and test the thermometers at the

high setting.

To prepare the system for use, place the 9600 Calibration Tester on a level

surface away from sunlight, drafts, and other heat and cold sources. Then

take the following steps:

1. Set the Temperature Select Switch to the 96.4 ºF position.

2. Plug the power adapter into a wall outlet.

3. Verify that the POWER indicator is on. If the POWER indicator is not

on, check the connection to the power source, and verify that the outlet

has power. Do not open the unit as there are no parts that can be

serviced in the field. If the unit is opened, the warranty will become

void.

4. Wait until the READY indicator lights continuously. The unit will take

about 6 minutes to stabilize during which time the READY indicator

might blink on and off briefly before staying on continuously.

5. After obtaining a temperature (as described in the following sections),

switch the temperature setting to 106.0 ºF, and wait for the READY

Indicator to light continuously. This will take about 4 minutes.

LEVEL 1 CALIBRATION TEST

Level 1 Calibration Test is described on the instruction label on the top panel

of the unit and in the following instructions. If a reading in the 9600 Tester

is less than, or equal to, +/-0.3 ºF from the temperature selected on the

9600, then the instrument is within specifications and no further testing is

needed.

OperationManual

THE MODEL 9000 AND MODEL 9020 THERMOMETER

1. The Model 9000 (InstaTemp® and ThermoGuide™) Thermometer can

be placed into a special Test Mode for checking the calibration using the

9600 System.

The Test Mode is entered by simultaneously pressing the PULSE,

TIMER, and MODE switches and is signified by a ‘T’ displayed on the

thermometer LCD.

The Test Mode will remain on as long as the “pulse timer” is active.

Once in the Test Mode, the mode may be extended by repeatedly

pressing the PULSE TIMER switch only. The Test Mode is exited

automatically when the “pulse timer” times out. The thermometer mode

will then change back to the thermometer mode prior to entering the

Test Mode. The Test Mode may be exited before the “pulse timer”

times out by pressing the MODE switch only. This will cause the

thermometer mode to change to the ORAL mode.

NOTE: For thermometers having serial numbers less than 25000, the Test

Mode is entered as an Operation Mode by repeatedly pushing the MODE

switch, For these thermometers, the Test Mode will remain until the mode is

manually changed - it will not automatically change back to the previous mode.

2. When the ready indicator is visible, push the slide forward to place a

probe cover on the sensor.

3. Inspect the probe cover for integrity. If the probe cover is damaged,

retract the slide fully to remove the damaged probe cover, When the

ready indicator is visible, push the slide forward to replace the probe

cover and then reinspect the integrity of the new cover.

4. Lift the flap and insert the tip of the Model 9000 Thermometer into the

large opening on the 9600 Calibration Tester until it rests on top,

perpendicular to the tester.

5. Immediately after inserting the thermometer, depress the scan button

until you hear the temperature completed beep (about 3 seconds), then

remove the thermometer from the 9600 Tester.

6. Verify that the reading on the Model 9000 Thermometer is within the

following tolerances:

96.4ºF Setting: 96.1ºF to 96.7ºF

106.0ºF Setting: 105.7ºF to 106.3ºF

WelchAllyn9600CalibrationTester

THERMISTOR THERMOMETERS

(Please note that the following procedure reflects the Model 600 series and

later thermometers. When testing the Model 500, follow these instructions

where possible.)

1. Set the thermometer to Monitor Mode and Fahrenheit (ºF) following the

instructions in the Users’ Manual for the instrument to be tested.

2. Extract the probe from its holder, but do not load a probe cover.

3. Lift the flap and insert the probe fully into the small hole in the top of

the 9600 Tester (the probe will go in approximately 1 3/4").

4. Wait 2 minutes for the temperature to fully stabilize.

5. Verify that the reading on the thermometer is within the following

tolerances:

96.4ºF Setting: 96.1ºF to 96.7ºF

106.0ºF Setting: 105.7ºF to 106.3ºF

See “Level 2 Calibration Test” to test units outside of these limits.

CELSIUS-ONLY THERMISTOR THERMOMETERS

1. Where possible, follow the instructions for the Model 600 series

Thermometer.

2. The Fahrenheit Mode is the preferred mode for calibration testing of

thermometers, because the temperature units (degrees) are smaller, and

give a more accurate test. Therefore, whenever possible, use this mode.

3. For Celsius-Only Units, use the following conversion table for testing

the calibration of the thermometer.

ºFahrenheit ºCelsius ºFahrenheit ºCelsius

96.0 35.6 105.6 40.9

96.1 35.6 105.7 40.9

96.2 35.7 105.8 41.0

96.3 35.7 105.9 41.1

96.4 35.8 106.0 41.1

96.5 35.8 106.1 41.2

96.6 35.9 106.2 41.2

96.7 35.9 106.3 41.3

96.8 36.0 106.4 41.3

OperationManual

LEVEL 2 CALIBRATION TEST

Usually thermometer calibration will fall within the +/-0.3ºF tolerance limit

when tested in the 9600 Calibration Tester. This tolerance is the result of

two elements: the thermometer system contributing +/-0.2ºF, and the 9600

Tester contributing +/-0.1ºF to the test reading.

If a Level 1 reading is greater than +/-0.3ºF from the temperature selected,

try the “Level 2 Calibration Test”. If the Level 2 Test is not successful, then

proceed to the TROUBLESHOOTING Section.

There are several variables that must be checked before concluding that a

thermometer is out of calibration. They are described on the following

pages.

LEVEL 2 CALIBRATION TEST

If the Level 1 Calibration Test is not successful - that is, if the reading is

greater than +/-0.3ºF from the temperature selected - conduct the Level 2

Calibration Test.

1. Check to see that the 9600 READY indicator is on continuously. It

should not go out unless the temperature selection is changed. If the

READY indicator goes out occasionally, be sure the unit is away from

drafts, direct sunlight, and other heat and cold sources, and that there is

continuous power to the unit.

If the READY indicator does not come on, but the unit reads close to

the temperature selected then there is an internal malfunction and the

temperature is being controlled by the Over-Temperature Protection

Circuitry. This temperature is not a calibrated temperature and cannot

be used to test thermometers. If this should happen, the 9600 Unit

should be returned to the factory for repair.

2. Check the temperature of the room. It must be within 65ºF and 80ºF

(18.3ºC and 26.7ºC).

3. For Model 9000 and Model 9020 Thermometers, use the following

procedure.

nEnsure that the sensor is free from debris. To do this, first load a

probe cover, then peel the probe cover off the tip. If the tip appears

clean, retract the probe. If you see dust or other debris on the tip,

clean the surface following the first 2 steps of the procedure in the

Model 9000 CALIBRATION ADJUSTMENT Section of this manual.

WelchAllyn9600CalibrationTester

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