Hewlett Packard HP-27


Serial number 1610S14385: 1976, 10th week, Singapore
Accessories Pouch

Manual: HP-27 Bedienungs-Handbuch (Geman, Jan 1976)

Power supply 110V/220V switchable

Original cardboard box in excellent condition
Condition Mint! Even the accu pack still works
Repairs, Comments -
Acquired 16.6.2003
.
HP codename, series Salad, Woodstock
Type, Precision, Input mode Scientific & Business, 10 BCD digits, exponent ±99, Reverse Polish Notation. Except for the tangent function with arguments near pi/2 the calculator exhibits excellent precision!
Programmable No
Memory 10 registers (0-9), not permanent
Display 10 digit 7 segment red LED plus sign
Special features Wide range of functions: Math, Statistics, Financial, Depreciation
Original Pricing, Production 1.5.1976 ($200) - 1.9.1978 ($175)
Batteries 2x AA or external power supply
Dimensions Length 12.7cm, Width 6.5cm, Height 2.9cm
Links HP-27 Owner's Handbook (PDF, English, dated Feb 1976)
HP-27 Owner's Handbook Addendum (PDF, English)
Comment

Calculation
Correct result
HP-27 Result
Error
100/18 
40/9 
5.555555*0.5555555
40/9+50/9000 
sqrt(2E6)/1000
exp(0.005) 
exp(0.999999) 
exp(1.000001) 
exp(100)/1E43
ln(1E-6)/10
ln(0.9995)*10000 
ln(1.0005)*10000
pow10(0.005) 
pow10(0.99999) 
pow10(1.00001)/10 
pow10(80.1)/1E80 
log10(2E-8) 
log10(0.9995)*10000 
log10(1.0005)*10000 
log10(1000100) 
2^40 / 1E12 
2^1.443 
1.000001^1E6 
sin(0.01 rad)*1000 
sin(1 rad)*10 
sin(1.5608 rad)*10 
sin(800 rad)*10 
tan(0.01 rad)*100 
tan(1 rad) 
tan(1.5708 rad)/1E5 
tan(800 rad) 
asin(0.01)*100,rad 
asin(0.5)*10,rad 
asin(0.999),rad 
asin(0.99999),rad
atan(0.01)*1000,rad 
atan(0.9999)*10,rad 
atan(1.0001)*10,rad 
atan(1E4),rad 
sin(0.01 deg)*10000 
sin(50 deg)*10 
sin(89.9 deg)*10 
sin(5000 deg)*10 
tan(0.01 deg)*10000 
tan(50 deg) 
tan(89.99 deg)/1000 
tan(5000 deg)*10 
asin(0.01 deg)*10 
asin(0.5 deg)/10 
asin(0.999 deg)/10 
asin(0.99999 deg)/10
atan(0.01 deg)*10 
atan(0.9999 deg)/10 
atan(1.0001 deg)/10 
atan(1E4 deg)/10 
+5.555555555 555555556
+4.444444444 444444444
+3.086419135 802500000
+4.450000000 000000000
+1.414213562 373095049
+1.005012520 859401063
+2.718279110 178575917
+2.718284546 742232836
+2.688117141 816135448
-1.381551055 796427410
-5.001250416 822979193
+4.998750416 510479141
+1.011579454 259898524
+9.999769744 141629304
+1.000023026 116026881
+1.258925411 794167210
-7.698970004 336018805
-2.172015458 642557997
+2.170929722 302082819
+6.000043427 276862670
+1.099511627 776000000
+2.718856483 813477575
+2.718280469 319376884
+9.999833334 166664683
+8.414709848 078965067
+9.999500371 413582332
+8.939696481 970214179
+1.000033334 666720637
+1.557407724 654902231
-2.722418084 073540959
-1.994900160 845839293
+1.000016667 416711313
+5.235987755 982988731
+1.526071239 626163188
+1.566324187 113108692
+9.999666686 665238206
+7.853481608 973649763
+7.854481608 975316429
+1.570696326 795229953
+1.745329243 133368033
+7.660444431 189780352
+9.999984769 132876988
-6.427876096 865393263
+1.745329269 716252907
+1.191753592 594209959
+5.729577893 130590236
-8.390996311 772800118
+5.729673448 571526491
+3.000000000 000000000
+8.743744126 687686209
+8.974376527 084057279
+5.729386976 834859268
+4.499713506 778012245
+4.500286464 574097998
+8.999427042 206779036
+5.555555556
+4.444444444
+3.086419136
+4.450000000
+1.414213562
+1.005012521
+2.718279110
+2.718284547
+2.688117142
-1.381551056
-5.001250417
+4.998750417
+1.011579454
+9.999769744
+1.000023026
+1.258925412
-7.698970004
-2.172015459
+2.170929722
+6.000043427
+1.099511628
+2.718856484
+2.718280469
+9.999833335
+8.414709848
+9.999500372
+8.939696482
+1.000033335
+1.557407725
-2.722418161
+1.994900161
+1.000016667
+5.235987756
+1.526071240
+1.566324187
+9.999666687
+7.853481609
+7.854481609
+1.570696327
+1.745329243
+7.660444431
+9.999984769
-6.427876097
+1.745329270
+1.191753593
+5.729511893
-8.390996312
+5.729673449
+3.000000000
+8.743744127
+8.974376527
+5.729386977
+4.499713507
+4.500286465
+8.999427042
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1E-9
0
1E-9
0
0
0
77E-9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0


Back To Contents