Whirlpool G-21 Service Manual

CONSUMER SERVICES TECHNICAL

EDUCATION GROUP PRESENTS

G-21

USING TEST EQUIPMENT

JOB AID

Part No. 4322537A

THE VOLT-OHMMETER (VOM)

INTRODUCTION

The volt-ohmmeter, usually referred to as a ”VOM,” or ”Multimeter,”

combines two individual instruments into one. These instruments are

the:

• Ohmmeter for measuring resistance (in ohms - Ω).

• Voltmeter for measuring voltage (AC and DC).

Technicians prefer the convenience of this single meter that combines

both measuring functions. Some multimeters offer other functions, such

as AC ampere, DC millivolt, and temperature measurements.

1

FEATURES & FUNCTIONS

Most VOMs offer the following standard features and functions:

DISPLAY — The window that shows the variable pointer, and the

printed measuring scales for the different types of readings. A digital

VOM does not use a pointer or printed scales. Instead, it displays its

measurements in actual numbers.

RANGE SELECTOR — A rotary switch that performs two functions:

1. Chooses the type of reading (AC volts, DC volts, and Ohms) to be

measured.

2. Selects the range of the highest expected reading. Some meters

use jacks instead of a selector switch, or a combination of jacks

and switches.

METER ZERO ADJUST — A control (usually a screw or knob) that

aligns the pointer with the zero mark on the measuring scales to in-

crease accuracy.

OHMS ZERO ADJUST — A control (usually a small knob) that aligns

the pointer with the zero mark on the Ohms scale. An internal battery

supplies a small voltage for making resistance measurements. As the

condition of the battery changes over time, the Ohms Zero Adjust con-

trol allows the user to easily zero the pointer to compensate for these

changes.

PROBE JACKS — Connection terminals for the test leads that are used

to make electrical measurements. The jacks and terminals are marked

with a (+) and a (–) symbol. They are also color-coded (usually red and

black) to ensure proper connections and polarity when making DC

measurements. If the leads are reversed when making a DC voltage

reading, the meter pointer will move in the direction opposite of the

meter scale. Some meters have a polarity reversing switch that inter-

nally reverses the (+) and (–) leads when the range switch is set to DC.

2

Display

Range Switch

Mechanical Zero Adjust

AC-DC Selector

Range Selectors

Ohms Zero Adjust

Test Leads

Probe Jacks

Alligator Clips

Figure 1

Simpson 260 Series 6XLMP Meter

Display

Voltage & Resistance
Selector

Probe Jacks

Temperature Probe Jacks

Temperature Adapter

Test Leads

Figure 2

Fluke 16 Multimeter

3

HOW THE METER MOVEMENT OPERATES

In order for the VOM to register a measurement, the meter’s pointer

must be made to move, or rotate, across the scale. For this to happen,

the base of the pointer is mounted on a pivot, and placed between the

poles of a permanent magnet. In addition, a coil of very fine wire is

wound around the base of the pointer.

As current passes through the coil, a small magnetic field is produced.

This field reacts with the field produced by the permanent magnet. The

amount of pointer movement is determined by the amount of current

passing through the coil, and the size of its magnetic field.

When current stops flowing through the coil, the pointer returns to zero.

It is very important to handle a VOM carefully, since a sudden jolt can

unseat the pointer from its pivot, and damage the movement.

4

MAKING ACCURATE MEASUREMENTS

To make your measurements as accurate as possible, use the following

steps:

1. Carefully read the operating instructions and safety information in the

VOM manual.

2. Check the meter and make sure that the pointer is set to “zero.” Use

the Mechanical Zero Adjust for the voltage scale, and the Ohm Zero

Adjust for the resistance (Ω) scale.

3. Make sure that the test leads are firmly inserted into their jacks.

Insert the black test lead into the negative (–) jack, and the red test

lead in the positive (+) jack.

4. When making a measurement, keep the metal probe tips firmly in

contact with the leads of the device being tested to insure good

metal-to-metal contact. Poor contact will cause inaccurate or fluctuat-

ing readings.

5. Do not touch the metal probes while taking a measurement. If you

touch the probes during that time, you could receive a serious electri-

cal shock. Touching the metal probes while making a resistance

measurement can cause the reading to be inaccurate because of

skin resistance.

6. Always select the range that will provide a midscale reading for the

resistance you want to measure.

5

7. Look straight at the meter pointer and scale. If you view them at an

angle, you can get an inaccurate reading. Some meters have a

mirrored scale to help prevent reading errors. With this type of scale,

you know that you are viewing straight if the pointer hides its reflec-

tion in the mirror (see Figure 3).

Pointer Reflection

No Pointer Reflection

Mirror

Figure 3

Incorrect Eye Position

Correct Eye Position

8. Select the appropriate voltage or resistance range so that the read-

ings are in the center portion of the scale. This will give a more accu-

rate reading (see Figure 4).

Midrange Viewing

Figure 4

6

RESISTANCE

MEASURING RESISTANCE (Ω)

When a resistance measurement is made, the test probes connect the

meter in series with the component, or load. To prevent damage to the

meter during a resistance measurement, the circuit or component is

always disconnected from the power source.

A very small current is needed to obtain a resistance measurement, and

is provided by a battery inside the VOM.

Note that the resistance, or ohm’s scale (Ω) of the meter, is the reverse

of the volts scales (see Figure 5). That is, the zero on each scale is at

the opposite ends of the meter.

Zero

Ohms

Zero
Volts

Less Current Flow

More Resistance

When the maximum amount of current is flowing through the circuit, the

pointer will rotate all the way to the zero end of the ohms scale.

When very little current is flowing, the pointer will remain at, or near, the

infinity (∞), or maximum resistance, end of the ohms scale. The Range

switch has various resistance values built into the meter, which allows

for the proper measurement of resistance.

Before making a resistance reading, any changes in the battery condi-

tion must be compensated for to assure accuracy. In order to do this:

1. Touch the test lead probe tips together to obtain the maximum cur-

rent flow from the battery.

Figure 5

More Current Flow

Less Resistance

2. Zero the resistance scale pointer with the Ohms Zero Adjustment

knob.

3. Zero the meter each time the range switch is changed.

7

CHOOSING THE CORRECT RESISTANCE RANGE

Four resistance ranges are available on the meter, as shown in Figure

6. Each of these ranges show the user how much to multiply the meter

indication by. The four range scales are read as follows:

a) R x 1 = Reading on Scale x 1.

b) R x 100 = Reading on Scale x 100.

c) R x 1 K = Reading on Scale x 1,000.

d) R x 10K = Reading on Scale x 10,000.

The easiest way to remember how much to add to the meter reading, is

to add zeros to it. For example, if the meter indicates 5, and the Range

switch is set to R x 100, then adding two zeros to the 5, would equal

500. If the meter indicates 37 and the Range switch is set to R x 10K,

then adding four zeros (10,000) would make the reading 370,000.

Figure 6

8

Unlike voltage scales, the scale used for resistance measurements is

not divided into equally-spaced increments. As resistance becomes

higher, the numbers on the scale are grouped closer together, making

an accurate reading difficult (see Figure 7).

Difficult Viewing

Figure 7

When making resistance measurements, it is important to try to get a

lower, or “midscale” reading, whenever possible (see Figure 8).

750 Ω On R x 1 Scale

750 Ω On R x 100 Scale

Figure 8

9

MEASURING CONTINUITY

The ohmmeter can also be used to check continuity in a circuit. Continu-

ity is a “continuous,” or “closed” circuit. An open circuit means that the

continuous circuit has been broken at some point. In this case, the

meter would indicate “infinite” resistance.

Figure 9 shows an open and a closed circuit.

AB

AB

Open

Infinite Resistance

Open Circuit

Figure 9

0 Ω Resistance

Closed Circuit

BASIC RULES FOR MEASURING RESISTANCE

When making a resistance measurement, remember several basic

rules:

a) Always disconnect the circuit, or component being checked, from

the voltage source before connecting the meter probes.

b) Isolate the component being checked by disconnecting one side

of the component from the circuit. This assures that meter current

will flow only through the component being checked.

c) Use the Range switch, and select the resistance range you will be

measuring.

d) Zero the meter with the Zero Ohms Adjust knob.

10

PRACTICE EXERCISE 1
READING THE RESISTANCE SCALE

Write the correct resistance reading in the space provided by each

illustration. The resistance ranges are shown.

1.

2.

R x 10K

R x 1K

3.

4.

R x 1

R x 100

11

PRACTICE EXERCISE 1 ANSWERS
READING THE RESISTANCE SCALE

1.

2.

R x 10K

5000 Ω

R x 1K

3.

4.

2500 Ω

R x 1

.6 Ω

R x 100

12

820 Ω

VOLTAGE

THE RANGE SWITCH

The Range switch has various settings for DC volts and for AC volts.

Both types of voltage have ranges with six settings: 2.5, 10, 25, 100,

250, and 500 volts (see Figure 10). The AC - DC Selector switch selects

the type of voltage being measured (–DC, +DC, AC).

Figure 10

THE VOLTAGE SCALE

The meter has three scales which are divided into the following incre-

ments (see Figures 11 A, B, & C). NOTE: The small division lines be-

tween the numbers on the scales help make the readings more exact:

a) The 0 - 10 scale is used to read voltages when the 10 or 100 volt

ranges are selected.

Figure 11A

13

b) The 0 - 50 scale is used with the 500 volt range.

Figure 11B

c) The 0 - 250 scale is used with the 2.5, 25, or 250 volt ranges.

Figure 11C

14

CHOOSING THE CORRECT VOLTAGE RANGE

Six voltage ranges are available on the meter, as shown in Figure 12.

Note that each one of the ranges has numbers that correspond to the

three meter scales. The Range switch and meter scales correspond to

each other in the following manner:

a) 2.5V Range = the 0 - 250 scale*

b) 10V Range = the 0 -10 scale

c) 25V Range = the 0 - 250 scale***

d) 100V Range = the 0 - 10 scale**

e) 250V Range = the 0 -250 scale

f) 500V Range = the 0 - 50 scale**

* When using this Range and scale combination, divide the reading by 100

(subtract two zero’s from the reading).

** When using this Range and scale combination, multiply the reading by 10

(add a zero to the reading).

*** When using this Range and scale combination, divide the reading by 10

(subtract a zero from the reading).

Figure 12

15

BASIC RULES FOR MEASURING VOLTAGE

When measuring voltage, use the following procedure:

a) Determine the type of voltage to be measured (DC or AC).

b) Set the AC - DC Selector switch for the correct type of voltage.

c) Set the Range switch for the maximum amount of voltage to be

measured (see the WARNING below).

REMEMBER: To insure accuracy, always select the range that provides

a midscale reading for the voltage, or resistance, you are measuring.

Selecting a voltage range that is LOWER than the amount being

measured can severely damage the VOM.

WARNING: When an unknown voltage is being measured, always

begin by setting your meter to the HIGHEST range. Then, as neces-

sary, remove the probes from contact with the circuit, and step the

Range switch down to the next range. Continue this procedure,

one range at a time, until the meter provides a midscale reading.

This practice will help provide an accurate measurement, and

prevent damage to the meter.

16

MEASURING VOLTAGE

Example 1

To measure a 9-volt battery, touch the meter probes to the battery termi-

nals. The needle moves across the voltage scale to the point, shown in

Figure 13.

Figure 13

Since the 10-volt range is selected, the reading will be taken on the

0 - 10 scale. Each increment on the scale represents .2 volts. Read the

pointer location on the scale between the 8 and the 10. It should indi-

cate approximately 9 volts.

Example 2

To measure a 20-volt battery:

a) Set the Range switch to the 25V position.

b) Touch the meter probes to the battery terminals.

c) Read the pointer on the 0 - 250 scale.

d) The pointer should indicate approximately 200 on the scale.

Since the range switch is set for 25V, divide the reading by 10

(200 ÷ 10 = 20).

Example 3

To measure a 280-volt circuit:

a) Set the Range switch to the 500V position.

b) Touch the meter probes to the circuit terminals.

c) Read the pointer on the 0 - 50 scale.

d) The pointer should indicate approximately 28 on the scale.

Since the range switch is set for 500V, multiply the reading by 10

(28 x 10 = 280).

17

PRACTICE EXERCISE 2
READING THE VOLTAGE SCALES

Write the correct meter reading in the space provided by each illustra-

tion. The voltage ranges are shown below.

25V

1.

10V

2.

3.

100V

500V

4.

18

— NOTES —

19

PRACTICE EXERCISE 2 ANSWERS
READING THE VOLTAGE SCALES

1.

2.

25V

19V

10V

2.8V

3.

4.

100V

45V

500V

315V

20

MEASURING LINE VOLTAGE

Line voltage is the voltage coming from the wall outlet. Line voltage can

be measured under no load (no appliance is connected or the appli-

ance is connected and turned off) or under a load (appliance is turned

on).

To measure the line voltage:

1. Attach the test probes to the meter.

• Plug the black probe into the outlet marked negative (–).

• Plug the red probe into the outlet marked positive (+).

2. Set the function switch to AC VOLTS.

IMPORTANT: Be sure the meter is set on the AC voltage scale and not

the Ohms scale.

3. Select a range that will include the voltage you are measuring.

• Higher than 125 volts AC if you are measuring 120 volts.

• Higher than 250 if you are measuring 220 volts.

To measure with no load:

1. Insert the test leads into the slots of the AC outlet (see Figure 14).

2. Read the meter and interpret the reading. The reading should be

between 115 and 120 volts.

Figure 14

21

To measure with a load:

1. Plug the appliance into the receptacle and turn on the appliance (see

Figure 15).

2. Insert the meter probe tips into the empty receptacle.

3. Read the meter. Under load conditions, the reading may be slightly

less than under no load conditions.

IMPORTANT: Appliances with heavy drive motors, such as washers and

dishwashers, should also be tested at the moment of start. If the voltage

drops more than ten percent, (less than 108 volts), when the motor is

started, it means that there is a problem with the electrical supply (the

electricity coming into the receptacle). Mark this on the service invoice.

State that there is a problem with the circuit, and that the customer has

been informed.

22

Figure 15

TESTING FOR GROUND AND POLARITY

A ground is a voltage reference point. Polarity is a check to make sure

that the outlet is wired correctly.

To test for proper grounding:

1. Test for line voltage (if there is no voltage you can not test for

ground).

2. Test for voltage between the short slot and the ground receptacle (the

round hole) (see Figure 16A).

• The receptacle has a long and a short slot. If the outlet has been

mounted correctly, the longer slot will be on the left (see Figure

16B).

• If there is line voltage between these two points it means the

receptacle is grounded.

IMPORTANT: Due to recent electrical code changes, you may begin to

see receptacles mounted upside down. This is done to make it easier to

put power cords into the outlet.

• If there is no round hole (ground receptacle), touch one of your

probes to the screw that fastens the cover plate to the outlet (see

Figure 16C ).

• No voltage indicates that the outlet is not grounded.

• To be grounded, the wire or tab must be attached to the screw.

CAUTION: IF THE OUTLET IS NOT GROUNDED, YOU WILL NOT

GET A READING. WRITE ON THE SERVICE ORDER: THE APPLI-

ANCE IS NOT GROUNDED AND THIS IS A DANGEROUS CONDI-

TION. THE CUSTOMER MUST CONTACT A QUALIFIED ELECTRI-

CIAN TO CORRECT THE SITUATION.

Figure 16

23

To test for polarity:

1. Test that there is line voltage between the long and short slots (120

volts) (see Figure 17A).

2. Test that there is line voltage between the short slot and the round

hole (ground receptacle) (see Figure 17B), or the center screw (120

volts) (see Figure 17C).

3. Test that there is NO VOLTAGE between the long slot and the ground

receptacle (see Figure 17D), or center screw (see Figure 17E).

Figure 17

CAUTION: IF THE OUTLET IS IMPROPERLY WIRED, THE THREE

TESTS, SHOWN ABOVE, WILL FAIL. A LICENSED ELECTRICIAN

MUST CORRECT THE PROBLEM.

REMEMBER: The short slot is HOT, the long slot is NOT.

24

MEASURING 240 VOLTS AC (3-WIRE RECEPTACLE)

CAUTION: When measuring 240 volts AC, extreme care must be

taken not to touch the metal test probes.

To measure the 240 volt line:

1. Attach the test probes to the meter.

• Plug the black probe into the outlet marked negative (–).

• Plug the red probe into the outlet marked positive (+).

2. Set the function switch to AC VOLTS.

IMPORTANT: Be sure the meter is set on the AC voltage scale and not

the Ohm’s scale.

3. Select a range that will include the voltage you are measuring.

• Higher than 250 if you are measuring 240 volts.

4. Touch the meter probe tips to the indicated outlet openings (see

Figure 18). The meter should measure approximately 240 volts AC.

Figure 18

25

5. Touch the meter probe tips to the indicated outlet openings (see

Figure 19). The meter should measure approximately 120 volts AC.

Figure 19

6. Touch the meter probe tips to the indicated outlet openings (see

Figure 20). The meter should measure approximately 120 volts AC.

Figure 20

26

MEASURING 240 VOLTS AC (4-WIRE RECEPTACLE)

CAUTION: When measuring 240 volts AC, extreme care must be

taken not to touch the metal test probes.

To measure the 240 volt line:

1. Attach the test probes to the meter.

• Plug the black probe into the outlet marked negative (–).

• Plug the red probe into the outlet marked positive (+).

2. Set the function switch to AC VOLTS.

IMPORTANT: Be sure the meter is set on the AC voltage scale and not

the Ohm’s scale.

3. Select a range that will include the voltage you are measuring.

• Higher than 250 if you are measuring 240 volts.

4. Touch the meter probe tips to the indicated outlet openings (see

Figure 21). The meter should measure approximately 120 volts AC.

Figure 21

27

5. Touch the meter probe tips to the indicated outlet openings (see

Figure 22). The meter should measure approximately 120 volts AC.

Figure 22

6. Touch the meter probe tips to the indicated outlet openings (see

Figure 23). The meter should measure approximately 240 volts AC.

Figure 23

28

7. Touch the meter probe tips to the indicated outlet openings (see

Figure 24). The meter should measure 0 volts.

Figure 24

29

MANOMETER

When it becomes necessary to measure gas pressure,

there are two instruments available that you can use: a

manometer, like the one shown on this page, and a

magnehelic gauge (shown on page 32).

A manometer is basically a U-shaped tube with a scale, marked in

inches of water column. To prepare and use the manometer, use the

following steps:

30

1. Check the appliance model/serial plate and note the gas pressure

rating.

2. Turn off the gas pressure to the range.

3. Prepare the manometer by filling the U-

shaped tube with water so that both

sides of the tube fill to the zero point

(see Figure 25). NOTE: Use a little food

coloring in the water to help make

reading the meter easier.

Figure 25

4. Connect the tubing that is supplied with the manometer over one end

of the manometer.

5. Remove a burner from the appliance and place the free end of the

tubing over the burner orifice.

6. Turn on the gas supply to the range.

7. Turn on the gas valve being

tested, and light at least one

other burner to serve as a

load.

8. Observe the movement of

the water in the manometer.

The gas pressure is read by

adding the water movement

in both legs of the tube, as

shown in Figure 26. It should

measure within the pressure

Figure 26

rating stated on the rating plate.

31

MAGNEHELIC GAUGE

The Magnehelic Gauge measures gas pressure. This type of gauge is

easier and faster to use than a manometer.

To use the gauge:

1. Check the appliance model/serial plate and note the gas pressure

rating.

2. Turn off the gas pressure to the range.

3. Remove a burner from the appliance and place the free end of the

tubing over the burner orifice.

4. Turn on the gas supply to the range.

5. Read the gas pressure directly from the scale of the gauge. It should

measure within the pressure rating stated on the rating plate. Some

gauges have numerous scales on the dial face. Read the water

column pressure scale when taking the measurement.

The Model G24507 Magnehelic Gauge is available from:

Marsh Bellafram, Inc.

1-800-727-5646

32

AMP CLAMP

The Fluke Model 30 Amp Clamp measures AC and DC current and

voltage. To use the meter, simply clamp it around the circuit under test,

and read the display for the appropriate measurement.

33

THERMOCOUPLE

TEMPERATURE TESTER

A Thermocouple Temperature Tester is helpful whenever it is necessary

to measure hot surface temperatures, or when calibrating gas or electric

ovens. The Tester is easy to use, and provides accurate temperature

measurements from –20˚F to 1350˚F. It is specially useful for measuring

temperature inside self-cleaning ranges, because of its high tempera-

ture range.

IMPORTANT: Do not “zero” the meter. It should always indicate the

ambient (surrounding) temperature.

To use the Thermocouple Temperature Tester, perform the following

steps:

1. Place the end of the thermocouple lead inside the area to be tested.

2. For greater accuracy, place the face of the meter in a horizontal

position.

34

OPERATIONAL NOTES:

1. To avoid inaccurate readings, do not shorten the thermocouple lead,

or severely bend it.

2. Do not place the instrument on top of the range during testing. The

heat will make it difficult for the internal ambient temperature com-

pensator to function properly.

3. With both the meter movement and the lead stabilized at the same

ambient temperature, use the adjustment screw on the meter face to

set the meter at the ambient temperature. The ambient temperature

can be checked with an accurate glass thermometer.

4. If the instrument is suspected to be defective, check the lead and

meter. Replace the lead first. If the problem still exists, the meter

movement is faulty.

The Model 14855 Thermocouple Temperature Tester is manufactured

by:

Robinair Division
Sealed Power Corporation
Robinair Way
Montpelier, OH 43543

35

MICROWAVE SURVEY METER

Model HI1501

On every microwave oven service call, a check for microwave energy

emission must be performed. A properly operating door and seal assem-

bly will normally register small emissions, but they must be no greater

than 4 mw/cm2.

When checking for R.F. leakage, use an approved R.F. measuring

device to assure less than 4mw/cm2 emission at 5 cm distance with a

maximum scan rate of 2.5 cm/second, in compliance with U.S. Govern-

ment Department of Health, Education and Welfare 21CFR1030, Perfor-

mance Standard for Microwave Ovens.

IMPORTANT: The meter must not be used without the spacer cone

in place.

1. Before each use, both the battery and the probe should be tested.

To test the battery:

a) Turn the selector knob to the “Battery Test” position. The meter

should read above the green marker line on the meter. If this

reading is below the green line, replace the battery.

36

To test the probe:

a) Turn the selector knob to “Probe Test.” The meter should read

between the green lines. If it does not, the probe is damaged and

should not be used. A defective probe cannot be replaced in the

field and should be returned to the factory for repair.

2. To operate the Microwave Survey Meter:

a) Turn the selection knob to the desired meter range.

b) Allow two (2) minutes for the instrument to stabilize.

NOTE: If the instrument has been stored in a very warm or

cold area, it should be allowed to stabilize at room tem-

perature with the selector switch ON until no zero drift is

observed.

c) Use the Zero Adjust knob and adjust the meter pointer to

true zero. The probe must be shielded or removed from

the vicinity of any R.F. field.

d) Keep the probe handle perpendicular, place the tip of the

cone against the surface to be measured, and the leakage

level will be accurately registered on the meter. The

spacer cone automatically gauges the detecting probe

5 cm from the test point. Always use the probe handle. DO

NOT PLACE YOUR HAND NEAR THE CONE END OF THE

PROBE.

e) The “Fast” position of the meter may be used to locate the

point of the highest leakage. Compliance readings should

be taken with the switch in the “Slow” position.

f) Zero the meter after each measurement. If there is a shift

in the meter zero, the measurement will not be accurate.

g) The selection knob should be turned to OFF when the

meter is not in use.

The Model Hl1501 Microwave Survey Meter is manufactured by:

Holiday Industries, Inc.
14825 Martin Drive

Eden Prarie, MN 55344
Phone: [phone]
FAX: [phone]

37

TAP TOOL

(For Sealed Gas Cooktops)

A tap tool (part #4372141) is required to perform a gas pressure check

on gas ranges with sealed burners. The tap tool is a small extension

that is used to lengthen the burner tube up to the cooktop area, so that

a hose can be connected from a gas pressure measuring device.

To connect the tap tool:

1. Remove the cooktop burner orifice from the burner to be tested.

2. Insert the tap tool in place of the burner orifice.

3. Perform the gas pressure test.

4. Remove the tap tool from the burner and reinstall the gas orifice.

38

CIRCUIT TESTER

To assure proper operation of any appliance, the correct polarity and

grounding of its electrical outlet is necessary. One of the first checks on

appliances should be to verify that the wall outlet is wired correctly. A

circuit tester can easily and quickly verify that an appliance is connected

to a properly wired (120 VAC) wall outlet.

A series of lights within the tester will perform the following tests:

Test Function LED Reading

Open ground 0 0 0

Open Neutral 0 0 0

Open Hot 0 0 0

Hot/Ground Reversed 0 0 0

Hot/Neutral Reversed 0 0 0

Correct 0 0 0

39

BACHARACH

CARBON MONOXIDE DETECTOR

To use the Bacharach Model PCA-12 Carbon Monoxide Detector:

1. Follow the instructions provided with the test equipment to prepare

the instrument. The unit will need a minute or so to warm up.

2. Let the oven operate for 7 minutes before taking measurements. Do

not position the meter near the oven during this period.

3. Insert the tester probe into the oven vent.

4. Press the RUN keypad.

5. Wait for the CO Air Free reading to stabilize.

6. Record the test results.

The Carbon Monoxide Detector is available by contacting the “Con-

sumer Assistance Center Safety Team” at: 1-800-541-5746.

40

POCKET THERMOMETER

DIGITAL

ANALOG

The pocket thermometer is a handy tool for measuring temperature. For

example, it can measure freezer or refrigerator compartments, heated

water from microwave ovens, and exhaust temperatures from dryer

vents.

41

TEMPERATURE DATA LOGGER

The ACR Jr. Data Logger measures and stores changes in temperature.

The Logger is used with a computer to store and retrieve the data.

Simply place the ACR Jr. Data Logger wherever you would like to record

temperature changes. The logger will automatically read and store data

every 2 minutes. When you wish to retrieve the stored data, run the

ACR Jr. Graph software on your computer.

42

ROBINAIRE WATTMETER

The Robinaire Wattmeter, Model 14865, measures voltage, (120 and

240), amperage (up to 99.9 amps), and wattage (power consumption).

43

COMPRESSOR START TESTER

The Compressor Start Tester is used to check the compressor for open

grounds and open windings.

44

ELECTRONIC LEAK DETECTOR

The Electronic Leak Detector detects the presence of any refrigerant

escaping from the sealed system.

45

MACHINE LEVEL &

INSPECTION MIRROR

The Machine Level is used to level appliances after they are installed in

their mounting locations.

The Inspection Mirror is used to inspect around a brazed joint and

should be able to fit in small spaces.

46

— NOTES —

47

— NOTES —

48

CORPORATION