Lloyd's Accumatic 200

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Calculators: Handheld: Lloyd's Accumatic 200 (aka E681) (aka EH-6818)

		Size (approx):	80mm x 145mm x 22mm (w,h,d) Weight 168g excluding batteries
		Power:	6.0V DC, 4 x AA size batteries. Also accepts adaptor/charger (undefined) through a socket on the top side in the middle. The battery compartment has a red ribbon pull to aid battery removal.
		Case:	Solid brick-shaped calculator made from two pieces of matt black plastic. Both sides have inset brushed aluminium panels that give it a quality feel. The oversized blue plastic display filter is slightly tilted and slightly inset. It has raised lettering for "ERROR" and "MINUS" indicators and a silver painted escutcheon. The keyboard surround is a stepped metal panel with black printed model and switch labels. It also has a raised Lloyd's logo highlighted in silver. The keys are bouncy and of the "rocking" type similar to some early Rockwell/Unicom models.
		Display:	8 digit blue VFD with two extra single red LEDs for overflow and negative indicators
		Features:	4 function calculator with percentages and three function, switch controlled memory. Switched floating/fixed two decimal modes.
		Age:	est. 1973-4
		Manufacturer:	Lloyd's Electronics, Inc., Compton, California, USA. Assembled in Mexico primarily of United States parts. Serial number 222588.
		Comments:	Lovely solid calculator with a nice big display and odd switched memory system. The logic is OK with good recovery but let down by the pseudo fixed decimal bug. The rocking switches and Mexico assembly make me think this may have been made in the Rockwell factory. The original case is a stiff black plastic "box" affair with a right side flipping front and popper closing. There is also a PVC wallet on the inside front to hold the instruction sheet.

Components:
Boards:
Construction:	Warning: it is very easy to damage this calculator on opening. Whilst there is a screw in the battery compartment, the whole thing is then held together by the strongly glued metal side panels. These are very difficult to remove without warping them. Additionally if you try to lever off the bottom edge this could easily break as it is so thin. For this reason I have not opened my example and will report on the inside when I can get hold of a scrap sample.

Logic comments:	The (C) button is used once to clear the last entry of a number and a second time to clear the whole calculator
	Overflow on number input is suppressed; typing in a ninth digit is ignored
	An overflow error displays the result and lights the single LED to the top left of the display and is recoverable using (C)
	Divide by zero displays "0." and lights the single LED to the top left of the display and is recoverable using (C)
	There is automatic constant on multiply and divide only - but it does not work with the "repeated equals" mode
	Negative numbers are flagged by a single red LED to the top right of the display thereby allowing full eight digit negative numbers
	The memory store uses an odd switch system which is either set to (M+) or (M-) which changes the function of the (M) key. There is no memory cancel function so you have to switch off or key in (MR)(switch to M-)(M)
	There is no indication of memory store - you have to remember it!
	There is a switch for Floating of fixed two decimal notation
	It suffers the pseudo fixed decimal bug: key in (1)(+)(0)(.)(0)(0)(0)(=) to give "1.000" which remains a fixed three digit decimal number until more digits are needed or you use multiple./divide.

	The one-sheet, single sided guide measures 76mm x 134mm and sits in the PVC wallet on the inside of the case. Basic instructions are given for calculations. Notice the EH-number is different from normal: an additional 8 at the end adding to the model number. Printed in the USA, CY-0008-016.