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Model 7800 Family Weight Classifiers User’s Manual

2

Risk of 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

10/10/05  7800_U.P65  PN 7424-15170i e2  Printed in USA

Summary of Contents for 7800

Page 1: ...User s Manual Model 7800 Family Weight Classifiers 7880 7820 7829 7824 7840 7885...

Page 2: ...isk of 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...

Page 3: ...f Contents Specifications 4 Initial Setup 7 Operation 9 Diagnostics Mode 15 Configuration Mode 20 Calibration Mode 24 Gravity Mode 27 Re Calibration Mode 28 Review Test Scale Settings 29 Communication...

Page 4: ...7885 75 150 x 0 05 lb 75 x 0 02 kg 3750d 7829 125 250 x 0 05 lb 100 x 0 02 kg 5000d 7840 125 250 x 0 05 lb 100 x 0 02 kg 5000d 7840 150 300 x 0 1 lb 150 x 0 05 kg 3000d 7824 125 250 x 0 05 lb 100 x 0...

Page 5: ...ainless steel weigh platter Overload protection Adjustable center stop fixed corner stops Model 7885 Painted mild steel base with stainless steel weigh platter Overload protection Fixed center and cor...

Page 6: ...value Over capacity indication will be given with dashes appearing in the upper line of the display when ever the weighed item exceeds 9 divisions over the rated capacity of the unit The scale will us...

Page 7: ...er ASCII W CR is sent by a remote device 1 Remove contents of the shipping container 2 Inspect the scale for evidence of shipping damage Immediately report any damage to the shipper 1 Mount the scale...

Page 8: ...5 3 in 13 5 cm Adjustable to 5 8 in 14 7 cm Scale Dimensions Min Cut Out Dimensions D 24 in 61 0 cm 24 75 in 62 9 cm W 18 in 45 7 cm 18 75 in 47 6 cm H 4 6 in 11 7 cm Adjustable to 5 1 in 12 9 cm Scal...

Page 9: ...1 With the scale powered on make sure the scale platter is empty and the display is at zero If it is not press the ZERO key 0 00 is displayed 2 Place an item to be weighed on the scale platter The sc...

Page 10: ...he configuration information This key also functions as YES or ACCEPT in the Menu Mode and as the DE CREASE key in the Gravity Mode All NCI 7800 bench scales except the 7885 can have an optional remot...

Page 11: ...ation The 7800 models power up ready for weighing operations Access the Menu mode by setting Switch 1 shown in Figure 1 or 2 to the OPEN or Menu mode position Access the Gravity setting mode by settin...

Page 12: ...CAL Recalibration Mode To change resolution and rounding type The structure for these menus is shown in Figure 3 Specific information about each mode followed by step by step instructions for accessi...

Page 13: ...Model 7800 Family Weight Classifiers User s Manual 13 Figure 3 Menu Structure...

Page 14: ...kg 75 x 02 kg 10 50 75 kg 250 x 05 lb 50 100 250 lb 100 x 02 kg 10 50 100 kg 300 x 1 lb 50 100 300 lb 150 x 05 kg 10 50 150 kg Display Baud Parity 12 E 1200 Even 24 E 2400 Even 48 E 4800 Even 96 E 96...

Page 15: ...d Requires a jumper short between transmit and receive data lines DIVISION TEST w AZT DIV A Weight data is normalized to 100 000 counts of displayed resolution AZT is enabled DIVISION TEST w o AZT DIV...

Page 16: ...leted 4 Press the ZERO key RA is displayed This stands for the RAM test 5 Press the TEST key to perform the RAM test PASS or FAIL is displayed briefly then RA 6 Press the ZERO key RO is displayed This...

Page 17: ...stands for the high resolution DIVISION TEST w o AZT enabled 14 Press the TEST key to perform this test The display shows the weight on the scale at a resolution of 100 000 counts 15 Press the TEST k...

Page 18: ...e current baud rate and parity selec tion is displayed 22 Press the ZERO key CAP is displayed This stands for capac ity 23 Press the TEST key The current capacity resolution selection is displayed 24...

Page 19: ...ble 3 for details 30 Pres the ZERO key LOC GR is displayed This stands for local gravity 31 Press the TEST key The current local gravity setting is displayed 32 Press the ZERO key CAL GR is displayed...

Page 20: ...he RS 232 commun ication protocol NCI NCI standard 8213 8213 compatible Mettler Toledo 3835 NCI 3835 SMA Scale Manufacturing Association AUTO 1 Auto print operation Type 1 AUTO 2 Auto print operation...

Page 21: ...urrent baud and parity choice is displayed 7 Use the ZERO key to scroll the choices found in Table 2 When the choice you want is displayed press the TEST key The choice is accepted and the display sho...

Page 22: ...14 When finished configuring your scale press the ZERO key until DONE is displayed then press the TEST keys or close Switch 1 to return to the normal weighing mode 11 Press the ZERO key PRTOUT is disp...

Page 23: ...the item is placed on the scale and the weight stabilizes This option is normally used in an application where the item placed on the scale is sealed and ready for the shipment weight to be registere...

Page 24: ...nter Zero indicator is on 3 While in AUTO 1 AUTO 2 or manual print modes scale will not respond to external serial commands The Calibration CAL Mode menu lets you calibrate your scale The items in the...

Page 25: ...splayed 2 Press the TEST key LBS lb or 1000G kg is displayed 3 Press the ZERO key to toggle between the choices When the choice you want is displayed press the TEST key to accept The choice is accepte...

Page 26: ...alibration weights on the scale and press the TEST key After a brief wait DONE is displayed 8 Remove all calibration weights from scale 9 Press the TEST key DIAG is displayed or return Switch 1 to the...

Page 27: ...in meters 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 T...

Page 28: ...ou may also change rounding methods i e scale or classifier Follow these steps to re configure your scale without weights Refer to Figure 3 1 From the normal weighing mode move Switch 1 to the Menu mo...

Page 29: ...The TEST key located on the front panel lets you perform some basic system diagnostics as well as review the current system settings without having to access switches inside the scale If you press an...

Page 30: ...ey to select the dis played item to run or view IMPORTANT Internal rocker switches will be ignored until you exit this special mode or power reset the scale When finished running tests or viewing the...

Page 31: ...Serial commands will be responded to only when the scale is in the normal operating mode and Switch 1 on the main board is in the CLOSED position DE 9 Female Scale DE 9 Male Host Pin Name Direction P...

Page 32: ...ter D hex SP Space 2 hex x Character from display including minus sign hh Two status bytes uu Unit of measure lb kg oz g etc using ANSI standard abbreviations W CR Scale Response LF xxxx xxuu CR LF hh...

Page 33: ...A CR or xxxxxx div n CR Results Returns weight normalized to 100 000 division with AZT on off Protocol must be set for NCI and the scale must be in the DIAG diagnostics sub menu Otherwise the scale w...

Page 34: ...as the letter E followed by a two digit error code Press the TEST key to continue operation If a calibration error occurs the only way to clear it is by recalibrating the scale The error codes are bro...

Page 35: ...y 3 Replace the display board 4 Replace the main board Missing or extra segments on display 1 Replace the display board 2 Replace the main board Scale will not return to zero or incorrect weight is di...

Page 36: ...weigh platter is on the scale 2 Press the ZERO key 3 Power off remove any items from the platter and then power on the scale 4 Recalibrate the scale 5 Replace the load cell 6 Replace the main board D...

Page 37: ...ain PCB DESCRIPTION PART NUMBER Keyboard Panel 1163 13204 Display PCB 7405 15465 Main PCB 7405 14704 2 Power Supply in line 1148 15536 Power Supply wallmount 1148 15535 7885 RS 232 Cable 1140 13842 78...

Page 38: ...Model 7800 Family Weight Classifiers User s Manual 38 Notes...

Page 39: ...Model 7800 Family Weight Classifiers User s Manual 39...

Page 40: ...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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