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Model 7821 Bench Scale User’s Manual

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Menu Structure

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Summary of Contents for 7821

Page 1: ...User s Manual Model 7821 Bench Scale...

Page 2: ...ful interference in which case the user will be required to correct the interference at his own expense CANADA This digital apparatus does not exceed the Class A limits for radio noise emissions from...

Page 3: ...of Contents 3 Specifications 4 Unpacking and Installing the Scale 5 Operation 5 Power Up 5 Modes of Operation 6 Diagnostics Mode 10 Configuration Mode 14 Calibration Mode 16 Gravity Mode 18 Error Cod...

Page 4: ...Model 7821 70 7821 75 and 7821 100 USA NTEP COC 95 070 Canada Ministry of Industry AM5076 Initial automatic zero setting is 10 of maxi mum capacity active at power up Manual zero setting range is 2 of...

Page 5: ...4 6 11 7cm For the optional remote display attach Velcro fasteners to both the back of the display and to the surface where the display is to be mounted To attach the Velcro fasteners clean the mount...

Page 6: ...side the 10 zero window center dashes are displayed _ _ _ _ Recalibration may be required 1 With the scale powered on make sure the scale platter is empty and the display is at zero If it not press th...

Page 7: ...ey changes the unit of measure between lb and kg The NCI 7821 bench scale has an optional remote display Typically the remote display is used to display weight only i e the ZERO and UNITS keys are not...

Page 8: ...Model 7821 Bench Scale User s Manual 8 Figure 2 Menu Structure...

Page 9: ...acity Calibration Capacity Calibration lbs Weights lbs kg Weights kg 150 x 05 lb 10 50 150 60 x 02 kg 10 30 60 70 x 02 kg 10 30 70 75 x 02 kg 10 30 75 150 x 02 lb 10 50 150 75 x 01 kg 10 30 75 200 x 0...

Page 10: ...e test of RAM in the processor Displays PASS or FAIL ROM RO Performs a checksum of all locations of ROM in the processor Displays PASS or FAIL Input Output I O Data is output by the scale and through...

Page 11: ...splayed This stands for the RAM test 5 Press the UNITS key to perform the RAM test PASS or FAIL is displayed briefly then DISP If the test fails contact your local Weigh Tronix distributor for service...

Page 12: ...nections and or contact your local Weigh Tronix distribu tor for service 10 Press the ZERO key HRESA is displayed This stands for the high resolution test with AZT enabled 11 Press the UNITS key to pe...

Page 13: ...ent gravity setting is displayed 18 Press the ZERO key CAL G is displayed This stands for calibration gravity setting 19 Press the UNITS key The calibration gravity setting is dis played 20 When you a...

Page 14: ...rity from table Protocol PROT Choose serial communi cation protocol NCI Ref 8408 14788 01 W S Z H U M Only 8213 Ref 8408 14788 03 3835 Ref 8408 14788 12 Follow these steps to access and configure the...

Page 15: ...he choice you want is displayed press the UNITS key The choice is accepted and the display shows BAUD 8 Press the ZERO key PROT is displayed 9 Press the UNITS Key The current protocol is displayed 10...

Page 16: ...lects the capacity of the scale Follow these steps to calibrate the scale Refer to Figure 2 1 From normal weighing mode move Switch 1 to the Menu Mode or OPEN position DIAG is displayed Press the ZERO...

Page 17: ...rom Table 3 6 Press the ZERO key to toggle between the capacity choices When the choice you want is displayed press the UNITS key The scale prompts LOAD 0 7 Clear all weight from the scale platter and...

Page 18: ...intains two gravity setting values The first is the calibration site value known as CAL G The second is the end user or local site value and is known as LOC G When the scale was originally calibrated...

Page 19: ...ly way to clear it is by recalibrating the scale The error codes are broken down into two hexadecimal numbers with each bit defining a single error condition The error codes are defined as follows Int...

Page 20: ...sponse descriptions please refer to the following Weigh Tronix NCI Serial Communications Documents NCI Standard Protocol 8408 14788 01 W S Z H U M only 8213 Protocol 8408 14788 03 NCI 3835 Protocol 84...

Page 21: ...F hh CR ETX Results Scale is zeroed returns status H CR Scale Response LF xxxx xxuu CR LR hh CR ETX Results Returns decimal weight in 10x with units plus scale status U CR Scale Response LF uu CR ETX...

Page 22: ...e of weighing platform 3 Power down then power up the scale 4 Recalibrate the scale 1 Power down then power up the scale 2 Check software PROM for proper insertion 3 Check display cables for the prope...

Page 23: ...he scale 2 Press the ZERO key 3 Power down then power up the scale 4 Recalibrate the scale 1 Check cable connection at both the rear of the scale and the host device 2 Check communication setting and...

Page 24: ...Model 7821 Bench Scale User s Manual 24 Notes...

Page 25: ...Model 7821 Bench Scale User s Manual 25 Notes...

Page 26: ...Model 7821 Bench Scale User s Manual 26...

Page 27: ...Model 7821 Bench Scale User s Manual 27...

Page 28: ...1000 Armstrong Drive Fairmont MN 56031 Telephone 507 238 4461 Facsimile 507 238 4195 E Mail service wt nci com www wt nci com...

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