Mettler Toledo PR/SR Operations Instructions Page 21
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PR/SR balances Startup procedure
09:20:25
–---- REPRO CHECK ---––-
––––––––– END ––––––––––
03.01.96
PR5002
1114051374
Your entry
Good
1.11 g
1.10 g
1.10 g
3
1.103 g
0.006 g
0.52 %
METTLER TOLEDO
Type:
SNR:
Bal:
ReproSet
1
2
3
n
x
s
s rel
Signature:
........................
Test Calibration Repro
Start
If a printer is attached, the result is automatically recorded.
The printout also shows the "ReproSet" setting specified in the "Weighing" menu
(see section 6.3.2).
Determining the minimum sample weight at the location of the balance
If your measured values have to comply with particular tolerance systems (e.g. pharmacopoeia), you can determine the
minimum sample weight which allows you to meet these requirements at the balance location.
For this you consider the relative standard deviation srel, which indicates the percentage error in the measured value. The
standard deviation s is not suitable for this purpose as it shows only the deviation for the particular weight value.
Weight s srel
10.0 g 0.01 g 0.1%
1.0 g 0.01 g 1.0%
Example 1
Same standard deviation s, but different percentage errors srel, depending on the
sample weight.
Weight s srel
10.0 g 0.01 g 0.1%
1.0 g 0.001 g 0.1%
Example 2
Same percentage error srel despite different sample weights and different standard
deviations s of the individual measured values- The absolute standard deviation s is
thus not suitable for the comparison of the quality of measured values.
Procedure
• For all sample weights, define a relative standard deviation (for instance, srel
should always be less than 0.1%).
• Perform the ReproCheck function several times and systematically lower the
weight of the test specimen to determine the weight at which you are below the
defined relative standard deviation.
• If you can not achieve the specified accuracy, you can adapt the repeatability
under "ReproSet" in the "Weighing" menu (see section 6.2.3) to improve the
relative standard deviation.
• If the results are still unsatisfactory, change the conditions at the balance
location. For example, use a draft shield or place the balance on a special
weighing table to minimize the influence of external disturbances.
- Operating instructions 1
- METTLER TOLEDO 1
- PR/SR balances 1
- Leerseite 2
- Contents Page 4
- 1.3 Layout 7
- SmartBar 8
- 0000000000000 10
- 2 Startup procedure 11
- 2.3 Leveling 13
- 345.78 g 16
- Cal done 16
- Cal / Test 17
- 2.6 Testing balance 18
- -0.03-g-D: 19
- 1999.98 g 19
- Test Calibration Repro 21
- 3 Weighing – basic functions 22
- 3.3 Zero setting and taring 23
- Æ key (section 3.6) 24
- G key briefly 25
- 3.8 Working with the SmartBar 26
- 27.5385 oz 27
- A-Z a-z 0-9*! < 28
- 4 Extended basic functions 30
- Header LotID 31
- 1 2 3 4 5 6 7 8 9 0 < 32
- PT=99.71 g 33
- 836.02 g 33
- 935.73 g 33
- 1258.20 g 34
- 44.3815 oz 34
- 7.88 g/m 34
- 5 Applications 35
- 423.45 g 36
- 420.12 g 36
- 823.45 g 37
- 820.12 g 37
- Max n=10_ 38
- Start n=100 dw=331.27g 39
- Results Clear WghTime 39
- Start n=0 dw=0.00g 39
- -523.45 g 40
- Application—10 PCS 40
- Fix10 Opt Set 41
- 10 20 30 Var PcWgt Fix 41
- 1 2 3 4 5 6 7 8 9 0 < 41
- 3318.4 g 42
- Fix10 Opt Set PCS 43
- Fix25 Opt Set PCS 43
- M+ n=100 ∑=4567.89g M 44
- M+ n=1 ∑=423.45g M 45
- 421.45 g 46
- M+ n=100 ∑=4567.89g M 48
- M+ n=0 ∑=0.00g M 48
- 823.60 g 50
- +T=1.25 g 51
- M+ n=0 x=0 Diff 52
- M+ n=1 x=51.120g Diff 52
- M+ n=2 x=51.085g Diff 52
- SetRef Results Clear 54
- <T- >T+ mean sdev srel 54
- 1 2 3 4 5 6 7 8 9 0 < 55
- M+ n=0 x=0 Diff 55
- M+ n=1 x=51.120g Abs 55
- 102.34 % 56
- 51.17 g 56
- NextComp 59
- -0.07 g 60
- 828.76 g 61
- M+ n=12 Results Comp 62
- M+ n=0 Results Comp 62
- LANGUAGE 6.5 64
- 1 2 3 4 5 6 7 8 9 0 . < 67
- G (return to main menu) 70
- Weighing 74
- Ü Setting for fine addition 75
- Ö with its current setting 75
- CustomUnit 78
- 4 CalInt 83
- Calibration 83
- ExtWeights 83
- Settings Printout Beep 84
- APPL WEIGH CAL SYSTEM 84
- Printout 85
- G key has 86
- Date Time BalID Icons 87
- Set dd.mm.yy mm/dd/yy 87
- 1 9:1 2:2 0 88
- V key, it 89
- V key is pressed, or 89
- PassWord 90
- Language 91
- ≥ 8000 g ≥ 4000 g ≥ 8000 g 98
- ≥ 20000 g ≥ 20000 g ≥ 20000 g 99
- 7.2.2 Dimension drawings 100
- METTLER TOLEDO 101
- Dimension drawing SR balances 102
- Standard equipment 102
- 7.3 Optional equipment 103
- 8 Appendix 105
- 8.3 Messages in the display 110
- Configure 112
- Application 113
- InitCal done 113
- 5000.00 g 113
- 8.5 Maintenance 114
- 8.7 Changing the battery 116
- SOP checklist 118
- 8.9 Index 119
- PR/SR balances Appendix 121
- PR/SR balancesAppendix 122
- P11780234 124
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