Salter Brecknell Pegasus Floor Scale User manual

1
Pegasus Floor Scale Installation Guide
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

3
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.

5
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

7
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: [phone] Fax: [phone]
e-mail: [email protected]
www.salterbrecknell.com