50g / 0.001g by OnBalance CT-250

<h2>Summary</h2><p>Small (not quite pocket-size) diamond balance.</p><p>The most sensitive (down to 0.001g); suitable for weighing diamonds; capacity 50g (250 carat)</p><p>Three settings: 50g / 0.001g, 100ct / 0.005ct, 250ct / 0.01ct</p><p>To read an article about weighing and weighing machines<a href="/blogs/weighing/weights-and-weighing" target="_blank"><span style="color: #0000ff;"> click here.</span></a> </p><p>This weighing machine is not approved for use in trade, it must not be used for buying and selling. For approved scales<a href="/collections/scales-balances-resolution-0001g-eg-for-diamonds" target="_blank"><span style="color: #0000ff;"> click here. </span></a> </p><p><strong>Features</strong><cr></cr></p><p>Built-on clear folding lid</p><p>Built-in spirit level / adjustable feet</p><p>Calibration weights included</p><p>Tare (re-set zero, e.g. put a on a scoop, re-set it to zero)</p><p>Backlist display</p><p>Auto-power-off if it isn't used in </p><p>Soft carry case with calibration weights and tweezers</p><p></p><h2>Technical Specification</h2><p>RESOLUTION / CAPACITY: 50g / 0.001g, 100ct / 0.005ct, 250ct / 0.01ct</p><p>It's called "CT-250" because it weighs up to 250 carats for weighing diamonds (5ct = 1g).</p><p>Also switchable to ounces (oz), pennyweight (dwt), carat (ct), grains (gn) </p><p>- grams, metric. Today everyone weighs gold in grams. But dealers tend to weigh silver in Troy ounces. </p><p>- ounce (some say, 'English' ounce, correct term is 'Avoirdupois' ounce) for food</p><p>- Pennyweight (dwt), pre-decimal system, still used in USA</p><p>- Carat (ct) for gemstones and diamonds, not to be confused with carat as gold purity). </p><p>- Grains, originally used for weighing gold (based on a grain of wheat), today used for weighing powder </p><p>SIZE: in its carrying case with accessories 6 X 6.5 X 2 inches (145 X 170 X 50mm).</p><p>The balance: 5 X 3 X 1.75 inches (130 X 75 X 40mm). </p><p>POWER: two AA batteries</p><p>CALIBRATION: weights included</p><p><a href="/blogs/jewellery-and-horology/conversions-ringsizes-finger-sizes-winders-weights">Click here</a> for a summary of weights used for weighing gold and silver <cr></cr></p><p><a href="http://www.cleavebooks.co.uk/scol/ccmass.htm%20">Click here</a>for an online conversion program<cr></cr></p><p></p><h2>Guarantee</h2><p>This scale is guaranteed for 10 years (postage charged after 1 year, proof of purchase required after 2 years).</p><p><strong>The guarantee excludes:</strong><cr></cr></p><p>- flat batteries. New batteries will be charged at ��2.00 plus ��6.50 for return postage (UK). </p><p>- if you lose the battery compartment cover (sorry, we don't have spares)</p><p><strong>The guarantee is invalid if there is:</strong><cr></cr></p><p>- obvious damage, e.g. dents, holes, cracked casing, weighing platform loose.</p><p>- signs of 'foreign material'. That's anything that should not be there, e.g. residues of herbs, chemicals, spilt tea, corrosion from leaking batteries.</p><p><strong>CALIBRATION</strong><cr></cr></p><p>Inaccurate readings can usually be fixed by calibrating the scale, this is something you can do yourself with the two weights included). THIS IS NOT A FAULT, all electronic measuring devices need calibrating every nin, see <a href="/blogs/weighing/calibrating-weighing-machines" _blank=""><span style="color: #0000ff;"> calibrating weighing machines</span></a>. We can calibrate it for you, for free, if it is returned within three months of purchase; after that, there is a charge of ��5.00 + ��6.50 postage (UK). </p><p></p><h2>Legal</h2><p>This weighing machine is not approved for use in trade and should not be used for buying and selling on a value-for-weight basis.</p><p>To see legal (approved for use in trade) balance"/collections/scales-balances-resolution-0001g-eg-for-diamonds" target="_blank"><span style="color: #0000ff;"> click here. </span></a></p>