Conair GB/ WSB manual Part Operation Load Cell Calibration, Be Sure, Cal Off, Zero WT

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¦	PART II	- OPERATION	¦
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	LOAD CELL	CALIBRATION

NOTE: Display examples shown here are in tenths of grams as displayed On 100 and 200 series models. 400, 900 and 1800 series models display full grams, no decimal.

If your	load cells are displaying a weight close to (				0.0), plus or
minus 5	grams, you may skip this section and go directly to
RATE CALIBRATION (next page).
If your	unit DOES NOT		display a weight of (	0.0) grams, plus or
minus 5	grams, you should recalibrate them, that is reset				ZERO weight,
at this	time.
To do so:
BE SURE	the weigh bin		is EMPTY.
BE SURE	the load cell		plug is plugged into the side of the controller.
BE SURE	the weigh bin		is resting on the load cells freely.
BE SURE	the air line to the dump valve is connected as it				would be
	during normal		operation. (A disconnected air line		adds weight.)
BE SURE	The load cells and bin are not jammed in any way.				To test for
	this see	that	a light touch on the bin causes the		display to
	change.	When	the pressure is removed the display		must return

to exactly where it was, plus or minus 0.1 gram.

If this does not happen, something is touching something and the bin is not entirely free to move. Check EVERYTHING around the bin.

LOAD CELL CALIBRATION:
The sequence of keystrokes is as follows:
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¦	Press:	*	Display will say:	(PASSWORD)		¦
¦	Press:	22222	Display will say:	(P	x.x)	¦
¦	Press:	*99	Display will say:	(CAL	OFF)	¦
¦	Press:	*	Display will say:	(CAL	ON )	¦
¦	Press:	EXIT	Display will say:	(P	x.x)	¦
¦	Press:	ZERO WT	Display will say:	(--WAIT--)		¦
¦			followed by:	(P	0.0)	¦
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The ZERO point of the load cells is now set properly. FULL weight calibration may also be done at this time, however, it probably is NOT NECESSARY. When load cell readings shift due to rough handling, the entire range of readings from ZERO to FULL shift together. ZERO weight calibration resets the full range of the cells and, therefore, corrects FULL weight readings as well. For information on FULL weight calibration, see RECALIBRATION OF LOAD CELLS section.

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¦	PROCEED TO:	RATE CALIBRATION	NEXT PAGE	¦
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