Salter Brecknell Pegasus Floor Scale Manual de usuario

Pegasus Floor Scale Installation Guide

For Shear Beam, Mild and Stainless Steel Scales and Poly Top Floor Scales

Proper scale installation provides accurate and reliable system operation. It is

essential to mount the scale on a flat, level, and solid surface. The load-

bearing surface areas should be within ±1/16 inch of the same level plane.

Minor irregularities in the floor may be compensated for with the feet adjust-

ments. The scale should not rock on the load-bearing surface areas and

these areas should not give under loads.

Figure 1

Pegasus scales

This scale is precalibrated and is ready for installation and use.

• Place the Pegasus deck on a solid, level surface. Use the leveling feet

to eliminate any rocking of the deck.

• Mount the indicator using the bracket provided. This will accommodate

desk or wall mounting.

• Uncoil the cable from under the scale and route it to the indicator. The

cable should be protected from traffic to avoid damage. Connect the

cable to the indicator. See note at left.

• Apply power to the indicator and verify proper scale performance.

Installation

Washdown systems will need to

have the cable connected to

the junction box. Use the

indicator manual to insure

proper wiring.

2Pegasus Floor Scale Installation Guide

Interface Connections

Figure 2

Junction box and wiring table - stainless steel scales

R2 is the corner balance for TB1.

R6 is the corner balance for TB2.

R10 is the corner balance for TB3.

R14 is the corner balance for TB4.

W-T Wire Color Signal

Green +Excitation

Yellow +Sense

White +Signal

Orange/White Shield

Red -Signal

Blue -Sense

Black -Excitation

Remove the access plate and the junction box cover plate. Attach the

leads of the indicator interface cable to TB5 in the junction box per Figure

2. On precalibrated systems, this cable is preinstalled and this step is not

necessary.

Figure 3

Junction box and wiring table - mild steel scales

W-T Wire Color Signal

Green +Excitation

Yellow +Sense

White +Signal

Orange/White Shield

Red -Signal

Blue -Sense

Black -Excitation

Pegasus Floor Scale Installation Guide

Calibration

For the indicator to function properly, the signals reaching the indicator must

be identical no matter where a weight is placed on the scale. Getting these

signals to match is called corner balancing the scale.

Your goal is to get the readings from the weight sensors to match. You do

not have to get the correct weight reading at this point. That is taken care of

when you calibrate your indicator.

This scale was corner balanced at the factory, but in a new installation it is

required that corner balancing and calibration be checked to ensure installa-

tion accuracy.

One potentiometer affects one weight sensor. You balance the weight

sensors by adjusting the corresponding potentiometer in the junction box

according to the steps listed on the next page.

1. Remove the junction box cover to access the potentiometers.

2. To capture the value of internal zero for your particular indicator, refer to

your indicator's Service Manual.

3. Use test weights equal to 20-25% of full capacity and obtain a displayed

weight value for the test weight applied to each of the four weight sen-

sors, like this:

3a. Disable AZT on indicator.

3b. Place certified test weight directly above first weight sensor.

3c. Record displayed weight value.

3d. Repeat steps 3b and 3c for each weight sensor.

4. If displayed weight values for all weight sensors equal each other, within

+/- 1 division, proceed now to Final Span Calibration instructions.

5. If displayed weight value for any weight sensor varies from the others by

more than +/- 1 division, adjust the appropriate junction box potentiom-

eter by turning it the number of 360 degree turns indicated by this

formula:

If the Number Of Turns is a positive value, turn the potentiometer

clockwise. If Number Of Turns is a negative value, turn the potentiom-

eter counterclockwise.

6. Repeat steps 3b and 3c followed by step 4 or step 5.

Corner Balancing

the Scale

Corner balancing is not required

on precalibrated systems.

4Pegasus Floor Scale Installation Guide

1. Make sure deck is empty and indicator is zeroed.

2. Load deck with as much evenly distributed test weight as available (not to

exceed scale capacity).

3. Unload deck and check for zero shift.

4. Rezero indicator if necessary and reload deck.

5. If necessary, trim the FINE SPAN control in the indicator for an indication

precisely equal to the calibrated test weights applied to the deck. See

your indicator's Service Manual for details on this procedure.

6. Enable AZT on indicator.

Your scale is now corner balanced and the system is calibrated.

Final Span Calibration

To replace one or more weight sensor follow this procedure:

1. Obtain access to junction box and the junction box cover.

2. Disconnect weight sensor cable from junction box terminal bar.

3. Set scale on blocks so feet are clear of the ground.

4. Unscrew foot from weight sensor(s) to be replaced.

5. Remove weight sensor mounting bolts and hardware.

6. Remove weight sensor.

7. Install new weight sensor.

8. Reinstall mounting hardware for weight sensor. Torque to 85 ft/lbs.

9. Replace foot.

10. Re-route weight sensor cable to junction box and connect.

11. Lower scale to floor and level.

12. Check corner balancing and calibration of the scale. Adjust if necessary.

13. Replace J-box cover.

Weight Sensor Replacement

Span calibration is not required

on precalibrated systems.

Pegasus Floor Scale Installation Guide

Floor Plates

Following are the illustrations of the floor plates for 2 and 5K capacity, 10K

capacity scales. You can use shim stock under these floor plates to obtain a

level mounting surface. Drill the four corner holes through the shim stock but

leave the center intact. These drawings are to scale. You can photocopy

them and use them as templates.

2 and 5K scales

Floor Plate Part Numbers

SST 28209-0018 3/16" thick

SST 28209-0026 3/8" thick

6Pegasus Floor Scale Installation Guide

10K Scales

Floor Plate Part Numbers

SST 28273-0012 1/4" thick

SST 28273-0020 1/2" thick

Pegasus Floor Scale Installation Guide

Poly Top &

Pegasus Decks Stainless Steel Decks Mild Steel Decks

Part Number Description 2/5k 10k 2/5k 10k

53627-0010 2.5k Weight Sensor 4 - 4 -

53627-0044 5.0k Weight Sensor - 4 - 4

50063-0066 Junction Box, SSTL 1 1

53774-0011 Junction Box, ABS plastic 1 1

41244-0018 Foot Assy. 4 - - -

41244-0026 Foot Assy. - 4 - -

53455-0017 Foot Assy. - - 4 -

53455-0033 Foot Assy. - - - 4

52655-1064 Bolts, Hex Cap-20 ½”x2” 8 8 - -

22408-1034 Bolts, 20 ½”x1.75” - - 8 -

22408-1042 Bolts, 20 ½”x2” - - - 8

14474-0230 Washer, Lock ½” 8 8 8 8

Replacement Parts List

2 and 5K Scale Floor Plate Part Numbers

SST 28209-0018 3/16" thick

SST 28209-0026 3/8" thick

10K Scale Floor Plate Part Numbers

SST 28273-0012 1/4" thick

SST 28273-0020 1/2" thick

Weigh Bar®is a registered trademark of Weigh-Tronix Inc.

03/24/03 PEGASUS_i.P65 PN 43008-0010A e1 Printed in USA

P.O. Box 9533

3620 Central Ave NE

Minneapolis MN 55418

Toll free: 800-637-0529

Tel: 612-781-4211 Fax: 612-781-4320

e-mail: [email protected]

www.salterbrecknell.com

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