2
2010 Scaletron Industries Ltd., Plumsteadville, PA Scaletron, Scaletron Sets the Standard In Corrosion Resistance, Model 1020-1, 1020-2, Model 1099, Model 2305, Model 2306, Model 2307,
Model 2308, Model 2310, Model 2330, Model 2350, Model 2352, Model 2353, Model 3001, Model 3002, Model 3003, Model 3004, Model 3005, Model 3006, Model 3050-1, Model 3050-2, Model 4000SS,
Model 4010, Model 4020, Model 4021, Model 4030, Model 4040, Model 4040IBC, Model 4041, Model 4042, Model 4042WB, Model 5305 are trademarks of Scaletron Industries Ltd. Total Electronic
System is a service mark of Scaletron Industries Ltd.
PRINTED IN THE U.S.A. FEB 2010.
III. Assembly and Start-up:
The Model 4020™ Drum Scale is shipped disassembled. Assembly instructions are as
follows:
The load cells are secured to discs and mounted in the base housing. All wire connections in
the base have been made and sealed at the factory. The digital weighmeter is assembled and
calibrated to the base at the factory. The customer must mount the indicator on the wall. The
wires must be run through the strain relief, connected to connector and plugged into indicator
before scale is operated.
Steps are as follows:
Step 1: Remove all parts from box and inspect for damage, broken wires, cracks in indicator,
etc. Any shipping damage must be reported to carrier.
Step 2: Place the scale on a solid dry surface. Clear the area of all debris where scale will sit.
Step 3: Weigh platform must be bolted to floor; clearance holes are provided in each corner
for 3/8” anchor bolts. Make bolts snug, but do not over tighten.
Step 4: Run conduit if required. Make hole in indicator box for conduit if used. If not, make
½” hole for liquid tight strain relief provided. Feed the wire up through the strain relief and
tighten the fitting. Fasten indicator to the wall. Connect wires to 6 pin connector provided (TB
1) according to the following code:
TB1 : Ret: Common, 4-20mA Return*
Out: + 4-20mA Output*
G: Green = + Signal
W: White = - Signal
Bk: Black = - Supply Voltage
R: Red = + Supply Voltage
*Connect your wires here if you are using 4-20mA output. Refer to the wiring diagram on
page 5 and 6 for 4-20mA connections. Jumper J-4 will need jumper in the top two pins for loop
powered, and the bottom two pins for scale powered (with board oriented as in drawing pg 5.)
Close the weighmeter and apply power as required: Standard Unit requires a 120 Volt power
source (power supply voltage range spans: 85 Volt to 265 Volt AC)
Step 5: Allow approximately 15 minutes warm up time before using the scale.
IV. General Use Instructions:
TARE ADJUSTMENT: The tare knob, located on the front of weighmeter, allows either
zeroing the scale to determine the gross weight of the drum, or presetting the known tare
weight of a drum or cylinder before it is placed on the scale. With the scale platform empty,
the operator can determine the tare weight (normally marked on each cylinder). When using a
drum, weigh empty container and mark drum with weight. The operator would then turn the
tare knob in the direction required to set a negative (-) reading on the display equivalent to tare
weight of the cylinder.
Example: 1. Cylinder or drum weight: 75 lbs.
2. Without cylinder or drum on scale, adjust tare knob until display reads -75.0.
** Clockwise rotation of knob increases tare. **
** Counterclockwise rotation of knob decreases tare. **
Note: When other fittings, etc., are to be secured to the cylinder or drum, the weight of these
items should be added to the tare weight of the cylinder or drum in order to have accurate tare
setting. When a cylinder or drum is placed on the scale, the display will then indicate the
actual net weight, or weight of its contents.
