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TECHNICAL DESCRIPTIONS
'LEGAL FOR TRADE' OR 'APPROVED'

All transactions where a product is sold directly by measured weight are controlled by Trading Standards, and any scale used for this purpose must be 'stamped' by this authority as approved for this use.

CAPACITY AND DIVISION SIZE

The capacity of a scale is the maximum weight it is designed to measure. Division size is the size of the incremental changes in displayed weight. For example 15 Kg x 1 g means that the scale will measure up to 15 Kg in steps of 1 gram.

STANDARD TARE

The ability to re-zero a scale when a bag or container etc. is placed on it in order that only the weight of the contents is displayed.

PRESET TARE

This is used typically to save time where the same weight of container is repeatedly used. The container is weighed once and this value is stored in the machine. The product can then be weighed whilst already in the container with the resultant displayed weight value being that of the net contents.

CALIBRATION & CERTIFICATION
Do your scales require calibration and certification for I.S.O.? Our calibration service offers you an easy solution. We will calibrate any self-contained item of industrial or retail weighing equipment sent to us and supply you with a Certificate of Calibration if required and return the equipment to you. Should the equipment fail the calibration, we can offer you a quick turn round repair at a very competitive price. If your equipment is too large for carrier transportation and you are in the Nottingham,Derby, Leicester or Lincolnshire area we could arrange a speedy on-site service at an extremely good price. Calibration procedures carried out in accordance with UK Weighing Federation code of practice 1998. All weights used are traceable to UK National Standards (Certificate of conformity available on request.)
 
STAMPING FEES & CERTIFICATION

STAMPING FEES (WEIGHING INSTRUMENTS)
Weight   Price [£]
Up to 15kg 27
15kg - 100kg 32
100kg -250kg 55
250kg - 1 T 89
1 T - 10 T 142
10 T - 30 T 315
Exceeding 30 T 474

UKAS / IN-HOUSE CERTIFICATION
All our weights can be certified by either UKAS or Non-UKAS accredited Trading Standards Offices for ISO 9000 or other purposes, i.e. the weights will be certified “Traceable to National Standards”.
N.B. Total cost is certification fee per weight, plus cost of the certificate listing them.
Weight First Wt Per Addnl Wt Certificate
IN-HOUSE (M1) 7 7 7
M2 UKAS 25 17 25
M1 UKAS 25 22 25
F2 UKAS 26 26 25
F1 UKAS 50 50 25

DKD CERTIFICATION
The DKD certificate is recognised by UKAS under the mutual recognition agreement existing between countries participating in the Western European Calibration Co-operative (WECC). If such a certificate is required it must be requested at time of ordering.
N.B. Prices include certificate and identification of weights.
Weight E1 E2 F1/F2 M1/M2
1mg - 500mg 316 41 22 19
1g - 50g 487 41 22 19
100g 487 47 26 19
200g - 1kg 487 47 26 19
2kg - 5kg 642 52 31 22
10kg 642 57 31 22
20kg 798 73 47 31
50kg 953 73 47 31


TOLERANCES FOR DIFFERENT ACCURACY CLASSES


  Tolerance (milligrams)
Nominal
Weight
M2 + only
(Trade stamped)
M1
+/-
F2
+/-
F1
+/-
E2
+/-
1mg 0.20 0.20 0.06 0.020 0.006
2mg 0.20 0.20 0.06 0.020 0.006
5mg 0.20 0.20 0.06 0.020 0.006
10mg 0.25 0.25 0.08 0.025 0.008
20mg 0.30 0.30 0.10 0.03 0.010
50mg 1.20 0.40 0.12 0.04 0.012
100mg 1.50 0.50 0.15 0.05 0.015
200mg 2.00 0.60 0.20 0.06 0.020
500mg 2.50 0.80 0.25 0.08 0.025
1g 5.00 1.00 0.30 0.10 0.03
2g 5.00 1.20 0.40 0.12 0.04
5g 10.00 1.50 0.50 0.15 0.05
10g 20.00 2.00 0.60 0.20 0.06
20g 20.00 2.50 0.80 0.25 0.08
50g 30.00 3.00 1.00 0.30 0.10
100g 30.00 5.00 1.50 0.50 0.15
200g 50.00 10.00 3.00 1.00 0.30
500g 100.00 25.00 7.50 2.50 0.75
1kg 200.00 50.00 15.00 5.00 1.50
2kg 400.00 100.00 30.00 10.00 3.00
5kg 800.00 250.00 75.00 25.00 7.50
10kg 1600.00 500.00 150.00 50.00 15.00
20kg 3200.00 1000.00 - - -
25kg 4000.00 - - - -
50kg 8000.00 2500.00 - - -

Choice of weight class

As a general guideline the classes of weights required to calibrate various machines of different capacities/increments are as shown in the table below:

  Increment
Scale capacity 1kg 100g 10g 1g 100mg 10mg 1mg 0.1mg 0.01mg
Up to 200g             F2 F1 E2
200g - 1kg           F2 F1 F1/E2  
1kg - 30kg   M1 M1 M1 F2 F1      
30kg - 100kg   M1 M1 M1          
over 100kg M1 M1 M1