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User’s Manual

Model 7620U

Bench Scale

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Summary of Contents for 7620U

Page 1: ...User s Manual Model 7620U Bench Scale...

Page 2: ...electrical shock Do not remove cover No user serviceable parts inside Refer servicing to qualified service personnel Weigh Tronix reserves the right to change specifications at any time CAUTION 10 23...

Page 3: ...ns 4 Initial Setup 7 Operation 8 7620U Menu Structure 11 Diagnostics Mode 12 Configuration Mode 15 Calibration Mode 17 Gravity Mode 19 Review Scale Settings 20 Communications 21 Error Codes 23 Trouble...

Page 4: ...1000 d 5 50 kg x 0 01 kg n2 5000 d The Model 7620 is approved as legal for trade United States NTEP COC 95 071 Canada Ministry of Industry AM 5074 Europe EEC OIML UK 2476 For use as a Class III devic...

Page 5: ...n each corner Automatic zero setting is 10 of maximum capacity active at power up Manual zero setting range is 2 of maximum capacity active using the ZERO key Under capacity indication will be given w...

Page 6: ...stable weight is displayed 0 1000d 350 msec 1000d 500 msec Maximum mean average Factory default settings 9600 baud 7 data bits even parity 1 stop bit Standard 9 pin pass through RS 232 interface cable...

Page 7: ...faces 2 If you want to install the scale surface flush with a countertop use these dimensions to guide construction 7620U Platform Minimum Cutout Dimensions Dimensions 356 mm Wide 375 mm Wide 318 mm D...

Page 8: ...uence the display will show the following The model number and software revision level A numeric counting test to all segments of the display A test of Random Access Memory RAM A test of Read Only Mem...

Page 9: ...nu mode and as the DECREASE key in the Gravity mode All NCI 7620 bench scales can have an optional remote display shown above with no keyboard function If a remote display with keyboard is used then S...

Page 10: ...as of the scale s function 2 CONFIG Mode To configure your scale for your application 3 CAL Mode To calibrate the scale With Switch 2 in the GRAVITY Mode or OPEN position you may increase the Local gr...

Page 11: ...hange the Local gravity setting press the ZERO key to increase the value or press the F1 key to decrease the value When done set Switch 2 back to the CLOSED position Table 1 Capacity Alternate Calibra...

Page 12: ...he processor Displays PASS or FAIL Input Output I O Data is output by the scale and through the use of a loopback connector the data is immediately read back into the receive channel and verified agai...

Page 13: ...test is performed and shows DISPLAY after the test is completed 4 Press the ZERO key RA is displayed This stands for the RAM test 5 Press the F1 key to perform the RAM test PASS or FAIL is displayed b...

Page 14: ...service provider 10 Press the ZERO key DIV A is displayed This stands for the high resolution test with AZT enabled 11 Press the F1 key to perform this test The display shows the weight on the scale a...

Page 15: ...re are as follows Filter FILTER Choose from FLTR ON OR FLTR OFF Default is FLTR ON In a stable vibration free location the FLTR OFF setting could be used if quicker display response is desired Baud BA...

Page 16: ...gle between the five choices 1200 2400 4800 9600 or 19200 baud 7 Press the F1 key Baud rate selection is stored 8 Press the ZERO key PARITY is displayed 9 Press the F1 key The current setting is displ...

Page 17: ...1 key Or move Switch 1 to CLOSED position for normal weighing mode The Calibration CAL Mode menu lets you calibrate your scale The items in the Calibration menu are as follows Capacity 5 30 6 30 6 35...

Page 18: ...he choices of capacities 5 30 6 30 6 35 5 50 3 When the correct capacity selection is displayed press the F1 key The scale prompts LOAD 0 4 Clear all weight from the scale platter and press the F1 key...

Page 19: ...per second per second i e m s2 It is not necessary to calibrate the scale therefore no calibration weights are needed to make this adjustment The scale maintains two gravity setting values The first i...

Page 20: ...set equal to the LOC GR setting Therefore it is recommended that you verify the local gravity setting is accurate before doing a full calibration Pushing the F1 key during the segment test on power u...

Page 21: ...ost Pin Name Direction Pin Name Direction 1 JMP 1 1 DCD IN 2 TXD OUT 2 RXD IN 3 RXD IN 3 TXD OUT 4 JMP 1 4 DTR OUT 5 SGND 5 GND 6 JMP 1 6 DSR IN 7 JMP 2 7 RTS OUT 8 JMP 2 8 CTS IN 9 NC 9 RI IN The sca...

Page 22: ...Returns scale status Z CR Scale Response LF hhh CR ETX Scale is zeroed returns status H CR Scale Response LF xxxx xxxuu CR LF hhh CR ETX Returns decimal weight in 10X with units and scale status M CR...

Page 23: ...splayed resolution along with units and scale status Contact your Weigh Tronix service provider or the Weigh Tronix customer service department for protocol Any system errors detected by the scale wil...

Page 24: ...r Display is Blank 1 Check that the following power connections are properly secured a power cord to AC mains outlet b power cord to universal connector on transformer 230 VAC only c transformer cord...

Page 25: ...eplace the display board 4 Replace PROM 5 Replace the QDT load cell Display shows under _ _ _ _ dashes Indicates that the scale is below zero or under capacity 1 Verify that weigh platter is on the sc...

Page 26: ...e host device 2 Check communication setting and baud rate on both the scale and host device 3 Perform I O loopback test 4 Replace the cable 5 Replace the I O board 6 Replace the QDT load cell The ZERO...

Page 27: ...15990 01 I O PCB 7405 15550 02 Power Supply 230 VAC 1148 15833 RS 232 Cable 1140 13842 Load Cell 32 kg 5 30 6 30 6 35 7153 15694 23 Load Cell 50 Kg 5 50 7153 15694 50 Shroud ABS Plastic 1076 15256 Shr...

Page 28: ...Model 7620U Bench Scale User s Manual 28 Notes...

Page 29: ...Model 7620U Bench Scale User s Manual 29 Notes...

Page 30: ...Model 7620U Bench Scale User s Manual 30 Notes...

Page 31: ...Model 7620U Bench Scale User s Manual 31...

Page 32: ...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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