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Monroe 122PDX: 
Setting the Pace for the Future 

Your Monroe 122PDX was built with the highest 
standards of quality and workmanship.  Because we 
have over 100 years of experience in the design and 
manufacture of fine office equipment, you have a 
product you can rely upon.  

Quality…Performance…Value… in calculators for 

you or your Company.

The Monroe 122PDX Calculator is backed by a 
comprehensive limited warranty that covers parts 
and labor.  And that same comprehensive protection, 
and convenient service, can be extended for as long 
as you own your calculator.  The Monroe 
Maintenance Agreement is renewable annually at 
your option.

Contents:  

Operating Controls and Features ...............................2

Proper Care & Maintenance ......................................3

Changing the Paper Tape ...........................................4

Changing the Ribbon .................................................5

Keyboard Layo

ut

 .......................................................6

Applications

 ...............................................................7

Ordering

Supplies

 ....................................................

19

Limited Warranty ....................................................20

 

About Your 122PDX 

Our new 122PDX will give you the opportunity to solve a variety of 
figurework problems more accurately and efficiently than ever before.  This 
instruction book will help you by providing complete, step-by-step 
information on the operation and application of your 122PDX.  Whether 

you’re an experienced operator or a beginner, you’ll gain a practical, 

working knowledge of your 122PDX after reading this book.

The 122PDX has a 12-digit display and a 12-digit internal calculating 
capacity.  The 122PDX also has one memory register and a separate Grand 
Total.

We want to be sure you take advantage of the many benefits Monroe has to 
offer.  If you have any questions about a particular feature or application, 

don’t hesitate to call 888

-666-7631.

Monroe Model 122PDX 

Serial Number: 

Please record the Serial Number of your new calculator in the space 
provided above and retain this instruction booklet for your records and 
future reference.The Serial Number is located on the bottom case cover of 
your calculator.
Thank you,

Monroe Systems for Business

 
!WARNING 

NOTE

:

This equipment has been tested and found to comply with the 

limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.  
These limits are designed to provide reasonable protection against harmful 
interference in a residential installation.  This equipment generates, uses and 
can radiate frequency energy and, if not installed and used in accordance 
with the instructions, may cause harmful interference to radio 
communications.  However, there is no guarantee that interference will not 
occur in a particular installation.  If this equipment does cause harmful 
interference to radio or television reception, which can be determined by 
turning the equipment off and on, the user is encouraged to try to correct the 
interference by one or more of the following measures:

ƒ

 

Reorient or relocate the receiving antenna.

ƒ

 

Increase the separation between the equipment and receiver.

ƒ

 

Connect the equipment into an outlet on a circuit different from that to 
which the receiver is connected.

ƒ

 

Consult an experienced radio/TV technician for help.

If necessary, the user should consult Monroe or an experienced 
radio/television technician for additional suggestions.

 

1

Summary of Contents for 122PDX

Page 1: ...age of the many benefits Monroe has to offer If you have any questions about a particular feature or application don t hesitate to call 888 666 7631 Monroe Model 122PDX Serial Number Please record the...

Page 2: ...ord 3 Be sure that paper roll and spooled ribbon have been installed properly Refer to pages 4 5 4 Turn power switch on 5 Set decimal point selector switch at the desired position NOTE Please remove r...

Page 3: ...n your calculator off Use the dust cover to keep your calculator clean 5 Prior to unplugging the calculator make sure the calculator has been turned off 6 Repairs should be performed by trained techni...

Page 4: ...ing paper from the spent roll 4 Position the new paper roll on the paper roll holders with the leading edge feeding from the bottom of the roll 5 Fold the leading edge back to form a straight edge and...

Page 5: ...move lever aside and lift out other spool 4 Holding new spools over spindles with black band up and exposed portion of ribbon on side nearest print wheels place one spool on spindle not engaged by lev...

Page 6: ...Back Space Key 7 Ref Key 19 Paper Advance Key 8 Plus Key 20 Change Sign Key 9 Minus Key 21 Decimal Selector Key 10 Numeric Keys Decimal Point Key 22 Rounding Control 11 Percent Change Key 23 Display P...

Page 7: ...Example 25 76 9 48 9 48 2 71 2 71 8 85 48 15 ENTER DEPRESS TAPE RESULT 0 C 25 76 9 48 9 48 2 71 2 71 8 85 48 15 2576 948 271 885 APPLICATIONS Addition Subtraction p 5 4 n d pd n F 0 1 2 3 4 C CE 7...

Page 8: ...ample 11 22 13 25 76 9 48 9 48 44 72 ENTER DEPRESS TAPE RESULT 0 C 11 22 13 25 76 9 48 9 48 003 44 72 11 22 13 2576 948 Addition Subtraction With Item Count Ref Key p 5 4 n F 0 1 2 3 4 C CE ref d pd n...

Page 9: ...l at Example 2 77 14 98 3 x 12 12 251 49 ENTER DEPRESS TAPE RESULT 0 C 2 77 14 98 3 00 20 75 20 75 x 12 12 251 49 277 1498 3 12 12 Addition Result Multiplied By A Number p 5 4 n d pd n F 0 1 2 3 4 C C...

Page 10: ...E RESULT 12 3 12 30 x 15 00 184 50 15 Example 12 3 x 4 2 x 2 5 129 15 ENTER DEPRESS TAPE RESULT 12 3 12 30 x 4 20 x 2 50 129 15 4 2 2 5 Simple Multiplication p 5 4 n d pd n X F 0 1 2 3 4 Chain Multipl...

Page 11: ...at 2 Example 1 65 x 211 348 15 1 65 x 59 97 35 1 65 X 67 110 55 ENTER DEPRESS TAPE RESULT 1 65 1 65 x 211 00 348 15 59 00 97 35 67 00 110 55 211 59 67 p 5 4 n F 0 1 2 3 4 X Constant Multiplication d...

Page 12: ...375 375 00 500 00 0 75 500 Decimal at 2 Example 48 3 16 00 12 3 4 00 10 5 3 3 50 ENTER DEPRESS TAPE RESULT 48 48 00 3 00 16 00 12 00 4 00 10 50 3 50 3 12 10 5 p 5 4 n F 0 1 2 3 4 Simple Division d pd...

Page 13: ...ample 23 5 x 10 18 239 23 46 9 75 4 72 234 51 ENTER DEPRESS TAPE RESULT 0 00 M 23 50 x 10 18 239 23 M 46 00 9 75 4 72 M 234 51 M 23 5 10 18 46 9 75 p 5 4 n F 0 1 2 3 4 m X m Accumulative Calculations...

Page 14: ...s 12 5 ENTER DEPRESS TAPE RESULT 28 40 28 40 x 12 50 3 55 12 5 24 85 Decimal at 2 Example What is the tax and the total cost of an article marked 24 25 Tax is 4 ENTER DEPRESS TAPE RESULT 24 25 24 25 x...

Page 15: ...Example What percent of 150 is 60 30 50 75 ENTER DEPRESS TAPE RESULT 60 60 00 150 00 40 00 30 00 20 00 50 00 33 33 75 00 50 00 150 30 50 75 p 5 4 n F 0 1 2 3 4 Percent of One Number to Different Numbe...

Page 16: ...elling price and what is the gross profit ENTER DEPRESS TAPE RESULT 100 100 00 M 25 00 33 33 U 133 33 25 Example An item sells for 100 Mark down the item 25 ENTER DEPRESS TAPE RESULT 100 100 00 M 25 0...

Page 17: ...amount of 125 to a present amount of 150 What is the amount of increase or decrease and the percent of change ENTER DEPRESS TAPE RESULT 125 125 00 U 150 00 25 00 U 20 00 U 150 p 5 4 n F 0 1 2 3 4 U P...

Page 18: ...Example 125 124 5 ______ 129 T actual pd change to d ENTER DEPRESS READ 123 123 12 4 124 124 00 5 5 129 00 129 00 p 5 4 n F 0 1 2 3 4 o Display Only Back Space d pd n 18 123...

Page 19: ...alculators and are reliable and economically priced How to Order Supplies For supply pricing information and ordering supplies for your new 122PDX calculator just visit www monroe systems com or call...

Page 20: ...RPOSE THE WARRANTY CLAIM PERIOD SHALL NOT BE EXTENDED BY REASON OF A CLAIM UNDER THIS WARRANTY OR OTHERWISE THE LIMITATIONS CONTAINED IN THIS WARRANTY ALSO APPLY TO ANY ADJUSTMENTS REPAIRS LABOR PARTS...

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