Monroe 8125 User manual

monroe
t h e c a l c u l a t o r c o m p a n y
user manual
8125
desktop print display calculator
designed by josh owen

2
Green Plea
Thank you for purchasing the Monroe 8125.
Monroe calculators are well known for their
durability and longevity. We expect you’ll be
enjoying your new 8125 for years to come, as
the “throwaway” calculator philosophy has
never found traction here at Monroe.
Please dispose of the old calculator this 8125
replaces in a responsible manner. Then when it
comes time to say good bye to this one, please
do the same. Also, please recycle the gift box
and other packing material.
The bag protecting your new 8125 is reusable.
Disposal options to consider:
+VUH[L`V\YVSKJHSJ\SH[VY[VHKLZLY]PUN
organization.
;HRL`V\YVSKJHSJ\SH[VY[VHUHWWYVWYPH[L
disposal and recycling center.
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the old calculator in the new calculator box and
return it to Monroe. We’ll handle the proper
disposal.
Contacting Monroe
Monroe Systems for Business, Inc
47 Runway Drive, Suite G
Levittown, PA 19057
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Web Site: www.monroe-systems.com
Record Your
Serial Number
Please record the Serial Number of your new
calculator and the date received in the space
provided below. Retain this instruction booklet
for your records and future reference.
Monroe 8125
Serial Number
Installation Date

3
Warning
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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
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MYLX\LUJ`LULYN`HUKPMUV[PUZ[HSSLKHUK\ZLK
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
PUZ[HSSH[PVU0M[OPZLX\PWTLU[KVLZJH\ZL
harmful interference to radio or television
reception, which can be determined by turning
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to try to correct the interference by one or more
of the following measures:
9LVYPLU[VYYLSVJH[L[OLYLJLP]PUNHU[LUUH
0UJYLHZL[OLZLWHYH[PVUIL[^LLU[OL
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*VUULJ[[OLLX\PWTLU[PU[VHUV\[SL[VUH
circuit different from that to which the receiver
is connected.
*VUZ\S[HUL_WLYPLUJLKYHKPV;=[LJOUPJPHU
for help.
If necessary, the user should consult Monroe
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additional suggestions.
Registering
Your Warranty
The 8125 is backed by a comprehensive 6
month Limited Warranty that covers parts and
labor. The same comprehensive protection
can be extended with a Monroe Maintenance
Agreement, renewable annually. To register the
^HYYHU[`HUKVYSLHYUTVYLHIV\[[OL4VUYVL
Maintenance Agreement:
Call: 888-666-7631
Email: [e-mail]
Contact: www.monroe-systems.com
(Please provide model number
and serial number.)

4
About
the 8125
Nearly a century has passed since Jay R.
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calculator to the business community. At the
time his vision was “to manufacture a machine
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ease and would produce the answers almost
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be simple and practically foolproof to operate,
with all factors used visible on the machine
so the operator would know the answers were
correct.” “Such a machine” thought Monroe,
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to the executive”. While it would be hard to
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standards, it was certainly a huge advance, as
all computations were performed manually at
the time.
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century of experience working directly with
America’s premier businesses. Working
directly means a Monroe sales representative
has been in virtually every business. That
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feedback to Monroe’s planning department
for improvements in future products. Those
improvements have always set the Monroe
calculator apart from all others, as no other
calculator company works directly with
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breaking features to simplify the work routinely
encountered in business. Nowhere is this
legacy more apparent than the Monroe 8125.
But the Monroe 8125 isn’t just another
functionally superior Monroe calculator. Prior
to commencing development of the 8125, we
listened carefully to our customer base. At
trade shows and during in-person meetings,
our users almost overwhelming asked us to
develop a calculator with a smaller footprint
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increasingly complex desktop environment.
Such a calculator should also retain the
functionality of our heavy-duty models and
maintain the reliability for which Monroe is well
known. With those basic criteria we added
VULV[OLYYLX\PYLTLU["P[T\Z[IL]PZ\HSS`
compelling. For that we sought the expertise
of award winning industrial designer Josh
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functionality and performance as the primary
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for the 8125 exudes clarity by blending utility,
usability, materiality and engineering. The
power of that philosophy and the depth of
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calculator of its time, the Monroe 8125.

5
About
Monroe
The rich heritage of Monroe spans nearly a
century. Established in 1912 by Jay R. Monroe,
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available calculator. While much has changed
in the intervening years the founding
philosophy of providing superior products
combined with outstanding customer service
remains the cornerstone of Monroe’s success.
We recognize that customers are the only
reason we exist. It is not surprising therefore
that today’s Monroe places major emphasis on
continuously improving the value we deliver to
our customers. We count our customers by the
thousands, yet treat each customer as though
they were our only customer. We measure our
value in the longevity of our relationships, many
of which span decades.
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PUK\Z[Y`4VUYVLPZJSLHYS`[OLKLÄUP[P]L
JHSJ\SH[VYWYVK\J[SPUL-YVT[OL¸ÄYZ[¹
commercial calculator to today’s
unprecedented models, Monroe calculators
have always set the standard.
If you are looking for a company whose
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dedication to customer satisfaction, you need
look no further than Monroe.

6
Table of
Contents
Getting Started 8
Remove Foam Pad 8
Installing Paper Roll 9
Changing a Ribbon 10
Changing the Battery 11
Proper Care and Maintenance 12
8125 Overview 14
Keyboard Diagram 14
Major Key Groupings 16
Slide Switches 18
Factory Default Settings 19
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Basic Operations 24
Addition and Subtraction 25
Repeat Addition and Subtraction 26
Addition and Subtraction with N Count 27
Addition and Subtraction with N Count,
Intelligent N Count and Automatic Average 28
Group and Grand Total 29
Group and Grand Total with N Count 30
Printing a reference number or date 31
Back Space, Error Correction 32
Multiplication and Division 33
Constant Multiplication 34
Constant Division 35
Calculator Mode Correction 36
Chain Multiplication and Division 37
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Percentages 39
Percent Increase 40
Percent Decrease 41
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Independent Memory 43
Changing the Sign of a Number 44
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Storing a Tax Rate 46
Computing Tax 47
Using the Tax Key to
Compute before Tax Cost 48
Setting the Time and Date 49
Time and Date Stamping the Tape 50
Basic Two Column Addition 51
Basic Editing Functions 52
Advanced Operations 54
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Truncate 60
Round Up 61
Automatic Incrementing
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7YPU[(SS+LÄULK-\UJ[PVUZ

7
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=HYPHISL(KK4VKL 
Nickel Rounding 71
Paper Saver Mode 72
Tax Key for Discount 73
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Setting International Punctuation 75
Setting International Date Format 76
Setting 24 Hour Clock Format 77
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Finance 80
Currency Conversion 88
=(;;H_ 
Discounted Tax 96
Time Card 100
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Reciprocal - Percent Change 104
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Advanced Functions 120
(\[VTH[PJ;^V*VS\TU(KKP[PVU=HYPH[PVUZ
Changing the 8125 to a Time Calculator 126
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Glossary of Features 136
Limited Warranty 145

8
Getting
Started
REMOVE THE RIBBON CUSHION!
To protect the print mechanism and secure the
ribbon spools in position during shipment a
foam pad lies between the ribbon spools and
the printer door.
REMOVE THIS FOAM PAD
BEFORE OPERATING!
Failure to remove this pad will result in
misoperation and possible damage to the
calculator.
WARNING
/(A(9+6-,3,*;90*(3:/6*2
NO USER SERVICEABLE PARTS ARE
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MUST BE DONE BY A QUALIFIED
:,9=0*,7,9:65
The socket-outlet shall be installed near the
equipment and easily accessible.

9
Changing
the Paper Tape
Installing the Paper Roll
(Use 2 ¼” Paper Tape)
To ensure ease of installation, read the
instructions completely before installing a new
paper roll. Then follow the instructions step-
by-step.
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9LTV]L[OL7HWLY*V]LY;VYLTV]L[OL
paper cover, lift the paper roll cover from the
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3PM[\WHUKYLTV]L\ZLKWHWLYYVSSMYVT[OL
paper cavity. Tear off paper between the used
paper roll and the printer. Pull remaining paper
through the printer by continuously lifting the
leading edge (nearest display).
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cavity. The leading edge of the paper should be
feeding from the bottom of the paper roll. Feed
the leading edge of the paper into the rear of
the print mechanism. A slot with embossed
down arrows indicates the paper feed slot.
Feed the paper until resistance is encountered.
Depress the paper advance button until the
paper extends several inches beyond the
printer mechanism.
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back of the tear off knife. Replace Paper Roll
cover. Tear off excess paper.

10
Changing
the Ribbon
(Use P65M, Black/Red twin spool ribbon)
To ensure ease of installation, read the
instructions completely before installing a new
twin spool ribbon. Then follow the instructions
step-by-step.
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9LTV]L[OLWHWLYJV]LYHUKWYPU[LYJV]LY
(Note how ribbon feeds from outside of spools,
around guides and between print wheels and
platen, black band up.)
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then move lever aside and lift out other spool.
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band up and exposed portion of ribbon on
side nearest print wheels, place one spool on
spindle not engaged by lever. Rotate spools to
be sure its pins engage in spindle gear.
;OYLHKYPIIVUHYV\UKN\PKLZHUKIL[^LLU
print wheels and platen.
0UZ[HSSV[OLYZWVVSHUKYV[H[L[VLUNHNL
spindle gear and also to take up slack in
ribbon.
9LWSHJLWYPU[LYJV]LY
CORRECT
INCORRECT

11
Changing
the Battery
The 8125 is battery supported. This eliminates
the need to re-enter date, time and other
J\Z[VTM\UJ[PVUZLUHISLK[OYV\NO[OL¸KLÄUL
key”. When the life of the battery is exhausted,
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battery must be replaced. When replacing the
battery, be sure to follow the steps below.
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9LTV]L[OLIH[[LY`JVTWHY[TLU[JV]LY
located on the bottom right of the calculator
case.
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the battery to the right as far as possible, using
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clears the battery holder.
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government regulations
0UZ[HSS[OLUL^IH[[LY`\ZPUNCR2025 or
4VUYVLYLJVTTLUKLKLX\P]HSLU[IH[[LY`
VUS`6YPLU[[OLYLWSHJLTLU[IH[[LY`so the +
symbol is on the top and slide fully to the left.
7YLZZ[OLRESET button using a pen.
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;\YUVU[OL(*WV^LYZ^P[JO
9LZ[VYL`V\Y+LÄUL2L`M\UJ[PVUZ
CAUTION
90:26-,?736:0650-)(;;,9@0:
9,73(*,+)@05*699,*;;@7,
DISPOSE OF USED BATTERIES
(**69+05.;6;/,05:;9<*;065
BATTERY
RESET

12
Proper Care &
Maintenance
1. Avoid locating and using the calculator in
direct sunlight. Areas of high humidity, rapid
[LTWLYH[\YLÅ\J[\H[PVUZHUKKPY[ZOV\SKHSZV
be avoided.
2. Use a dry cloth to clean the calculator
case parts. Do not use water, detergents, or
solvents.
3. Do not place objects on the calculator. Avoid
WLYMVYTPUNVMÄJLM\UJ[PVUZZ\JOHZZ[HWSPUN
above the unit.
4. To preserve the brightness of the display,
turn the 8125 off when not in use. 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
technicians. There are no user serviceable
parts in this unit. DO NOT ATTEMPT TO
+0:(::,4)3,;/0:<50;05(5@>(@
7. THIS CALCULATOR SHOULD NOT BE
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8. The socket-outlet shall be installed near the
LX\PWTLU[HUKZOHSSILLHZPS`HJJLZZPISL

13

14
8125 Overview
2,@)6(9++0(.9(4
1 Decimal Selector
 +LÄUL2L`
 ;PTL*HSJ:^P[JO
 ;^V*VS\TU .YHUK;V[HS:^P[JO
 +PZWSH`7YPU[+PZWSH`U*V\U[:^P[JO
6 Paper Advance Key
7 Tax Key
 <ZLY+LÄUHISL2L`Z
 ;PTL+H[L2L`
10 Change Sign Key
4LTVY`6UL;V[HS2L`
4LTVY`6UL:\I[V[HS2L`
4LTVY`6UL4PU\Z2L`
4LTVY`6UL7S\Z2L`
,X\HSZ4PU\Z2L`
,X\HSZ7S\Z2L`
17 Percent Key
*SLHY*SLHY,U[Y`2L`
19 Backspace Key
20 Divide Key
,X\HSZ2L`
22 Times Key
23 Numeric Keypad
24 Minus Key
25 Plus Key
26 Reference Number Key
27 Subtotal Key
28 Total Key

15

16
4HQVY2L`
Groupings
ADDING MACHINE - A
The keys in this grouping are referred to as
the Adding Machine Controls. This portion
of the 8125 will be referred to as the Adding
Machine, or Accumulator. Accumulation takes
place in the adding machine through entry and
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YLJHSSZHUKWYPU[ZKPZWSH`Z[OLJVU[LU[ZVM[OL
adding machine, but does not clear the adding
machine. The 1RL`YLJHSSZHUKWYPU[ZKPZWSH`Z
the contents of the adding machine and clears
it’s contents.
1;6;(32,@)
;/0:0:;/,653@2,@;/(;*(5*3,(9
THE CONTENTS OF THE ADDING MACHINE/
(**<4<3(;69
5<4,90*2,@7(+*
Includes 0 – 9, 00 and decimal point keys.
CALCULATOR CONTROLS - D
The keys in this grouping are referred to
as the Calculator Controls. This side of the
8125 is the calculator portion. NOTE: THE
CALCULATOR AND THE ADDING MACHINE
ARE COMPLETELY SEPARATE AND
05+,7,5+,5;
C/CE - E
Clears a live entry or pending calculation.
56;,!;/,**,2,@+6,:56;*3,(9
;/,(++05.4(*/05,(**<4<3(;69
(**<4<3(;692,@:-
;OL$HUK$òRL`ZHYLHJJ\T\SH[VYRL`Z
During normal operation they complete
a calculation and store the results of that
calculation in the adding machine. The adding
machine (A) and accumulation keys (D)
combine to create the Accumulator.
INDEPENDENT MEMORY - G
The keys in this grouping comprise the
Independent Memory.
<:,9+,-05,+2,@:/
6W[PVUHSM\UJ[PVUZH]HPSHISL7YLZZPUN[OL
+LÄUL2L`HUKLU[LYPUNHJVKLYLKLÄULZ
[OLZLÄ]L\ZLY+LÄUHISL2L`Z
+,-05,2,@0
,UHISLZ[OLVW[PVUHSM\UJ[PVUHSP[`HUKVY
KLÄULZ[OLM\UJ[PVUVM[OLÄ]L<ZLY+LÄUHISL
Keys.

17

18
Slide
Switches
DECIMAL SELECTOR SWITCH
Allows selection of up to nine decimal settings
+, F, 0, 1, 2, 3, 4, 5, 6. For example, when set
at 2, all totals and results will contain two
KLJPTHSWSHJLZ"H[UVKLJPTHSZ^PSSILWYPU[LK
or displayed. In Floating (F) decimal setting,
results are expressed at maximum decimal
accuracy. When working with dollars and
cents, the Decimal Selector can be set at Add
Mode (+), eliminating the need to enter the
decimal point.
D/PD/N SELECTOR SWITCH
Allows the 8125 to be operated in Display only
mode (d position), Print and Display mode (pd)
or Print and Display mode with n count (n).
TC/ /GT SELECTOR SWITCH
This switch allows three choices. The tc
position stands for “two column”. The
WVZP[PVUPZ[OLUL\[YHSVMMWVZP[PVUHUK[OLN[
position stands for “group and grand total”.
TIME/CALC SELECTOR SWITCH
This switch allows two choices. In the time
position, the 8125 assumes entries are hours
and minutes and operates in time clock
mode. In the calc position, the 8125 operates
normally.

19
Factory
Default Settings
The 8125 has a number of optional features and
functions that may be enabled as illustrated in
the next section. Certain Settings are referred
to as “default settings”, i.e. when you receive
the 8125, it comes with these settings from the
factory.
US PUNCTUATION
Numbers are formatted with commas
separating thousands and a decimal point
separating dollars and cents, e.g. 1,234.15.
US DATE FORMAT
It is assumed that entry of date and any
calculation based upon dates will be mm.dd.
yyyy.
/6<9*36*2
It is assumed that the time clock calculations
HYLIHZLKVUOV\YJSVJRMVYTH[56;,!0U
this format entries can be made in 24 hour
clock format, but results will be in 12 hour
format.
UNITS/UNITS MODE
If the decimal is at + (add mode), multiplying
12 x 5 for example will be accepted as whole
number times whole number.
;(?2,@
If a rate is stored with the tax key, the
JHSJ\SH[PVU^PSSILHZZ\TLK=(;PL[H_^PSS
compute the amount prior to the addition of
that tax rate amount.
,+0;05.2,@:
;OLÄ]L\ZLYKLÄUHISLRL`ZHYLKLÄULK^P[O
the editing function.
ROUNDING
YV\UKPUNPZHZZ\TLK

20
+LÄUHISL
Functions
The 8125 contains a number of user selectable
internal options. These settings can simplify
routine calculations, save unnecessary steps
and permit the user to adapt the 8125 to their
ZWLJPÄJ[HZRZ;OLZLPU[LYUHSM\UJ[PVUZHYL
HJ[P]H[LKI`WYLZZPUN[OL+LÄUL2L`MVSSV^LK
by the numeric or function key shown below.
?
;
 9\UUPUN½7YPU[
 9\UUPUN½+PZWSH`
Truncate
Round Up
:L[0KLU[PÄLY
4
 7YPU[+LÄULK-\UJ[PVUZ
Price/Price
Units/Price
Sum of 1st factor ( ×or ÷ )
Sum = and % results
7YPU[½HM[LYLU[Y`
+PZWSH`½HM[LYLU[Y`
Rounding Disabled
Round up to decimal point.
(\[VPUJYLTLU[PUNPKLU[PÄJH[PVUU\TILYZ
Sum =, %, elapsed time and taxes
Print current enabled functions
Z[UKLU[YPLZKVSSHYZJLU[Z
Z[LU[Y`^OVSLU\TILYUKLU[Y`KVSSHYJLU[Z