OHAUS SD35 User manual

SD SERIES BENCH SCALE EN-1

Ohaus SD Series Bench Scale

INSTRUCTION MANUAL

• The contents of this manual applies to all models of the SD Series Bench

Scale.

• Calibration weights are not provided with this product.

• For best results, use the product within the specified operating temperature

range.

• For best accuracy, perform your measurements in a clean environment, free

of electrostatic and magnetic fields, dust and dirt, moisture, vibration and air

currents.

• Use your SD Series Bench Scale with care, gently loading items to be weighed

on the center of the platform. Avoiding rough treatment will aid in extending

the life of your Scale.

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EN-2 SD SERIES BENCH SCALE

Introduction

This manual covers operation for the Ohaus SD Series Bench Scales.

Unpacking

SD Series Bench Scale is shipped with the following components:

• Indicator • AC Power Adapter

• Scale Base • This Instruction Manual

• Mounting Brackets • Warranty Card

Leveling Scale Platform

The Scale Base should be placed on a level, stable surface before operation.

Models SD75L and SD200L are equipped with adjustable leveling feet. Adjust the

four leveling feet under the platform to level it.

Power Options

AC Adapter Operation

• The AC Adapter (included) may be used to power the system when battery

power is not available.

• Check that the AC input power as marked on the Adapter matches the

available power source.

• Connect the round plug of the AC Adapter to the power input jack at the side of

the Indicator housing. See Figure 1.

• Plug the AC Adapter into an AC power outlet.

Figure 1. Connecting Adapter Plug to Indicator.

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SD SERIES BENCH SCALE EN-3

Battery Installation (Optional)

• Open the battery cover on the bottom of the Indicator and install three “C”

size (LR14) alkaline batteries into the compartment. Orient the batteries as

shown on the inside cover. Close the battery cover.

NOTE: Batteries are not included.

Figure 2. Battery Installation.

CAUTION: Do not dispose of used batteries in domestic waste. Follow

the proper disposal or recycling requirements in accordance with local

laws and regulations.

Indicator Mounting and Placement Options

• Table Top Placement:

The Indicator may be placed on a flat table surface without additional

hardware. Four rubber feet provide reduced slippage on most surfaces.

• Direct Wall Mounting:

The Indicator may be mounted directly to a wall using two screws (not

included). Select appropriate size screws that fit into the holes at the bottom

of the Indicator housing. See Figure 3. When mounting to a wall without a

solid backing, use appropriate anchoring hardware.

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EN-4 SD SERIES BENCH SCALE

Figure 3. Direct Wall Mount Arrangement.

• Bracket Wall Mounting/Table Mounting:

Attach the two mounting brackets as shown in Figure 4. Position the

Indicator where desired on the wall or table. Install 2 screws (not supplied)

into the ends of each bracket to secure them to the surface. When mounting

to a wall without solid backing, use appropriate anchoring hardware.

MOUNTING NOTES:

1. When attaching brackets: Insert round pins into holes at bottom of

Indicator, slide each bracket back to lock in place.

2. Mounting brackets may be attached in two different orientations to provide

optimum viewing angle.

3. Some mounting positions may require that the brackets be attached to the

work surface before being attached to the indicator.

Figure 4. Bracket Wall & Table Mount Arrangements.

120mm / 4.72”

90mm / 3.54”

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SD SERIES BENCH SCALE EN-5

Product Features & Operation

Figure 5. Indicator Panel Controls.

Two Button Keypad

• ON/ZERO

Off

:A short press turns on the scale when it is off. When the scale

is on, a short press zeroes the scale, and a long press turns the scale off.

• UNITS

Cal

:A short press changes the weighing unit and weighing mode.

A short press initiates countdown during Dynamic Weighing Mode.

A long press initiates the calibration process.

Display Window

• Large 7-Segment Numeric Characters: Weight (mass) values are

shown using 4 digits including negative sign and decimal places. Prompts

for calibration and possible error conditions are also shown using these

digits.

• Stable Reading Indication: A *will appear in the lower left corner of

the display to indicate when the reading is stable.

• Weighing Unit Indication:The weighing unit selected appears on the

right side of the display.

• Dynamic Weighing Mode Indication:A • will flash next to the

selected unit during this mode.

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EN-6 SD SERIES BENCH SCALE

• Low Battery Indication:The battery symbol on the left side of the

display indicates a low battery condition. When first displayed ,

approximately 12 hours of operation remain.

When the battery is fully

depleted, the scale will momentarily display “Lo bAt” and shut off.

Operation

• Power Up Test:When the ON/ZERO

Off

button is pressed, the scale

is turned on, all display segments will appear for a short time, followed by

the software version. The display will then reset to zero.

• Zero Function: By pressing the ON/ZERO

Off

button, the scale display

returns to zero. When adding additional mass, the ON/ZERO

Off

button

may be used repeatedly until the full capacity of the scale is reached.

When a container is used, the ON/ZERO

Off

button may be used to

simulate a Tare function. Additional mass may then be added as a NET

weight. When removing both the sample and container from the scale, a

negative value may be displayed. Zero the scale again before subsequent

usage.

NOTE: The ON/ZERO

Off

button will perform a true zero setting function when

displayed values are within +2% of full capacity. Above 2%, the range is

limited to full capacity by subtraction.

• Negative Values:When a load is removed from the scale, any previously

zeroed value will be displayed as a negative number. To return to normal

operation, the negative value is cleared from the display by pressing the

ON/ZERO

Off

button

• Overload:If the applied load exceeds the capacity of the scale, an “E” is

displayed. Remove the load and the scale will return to normal operation.

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SD SERIES BENCH SCALE EN-7

• Auto Shut-Off: To extend battery life, the scale will automatically turn off

after approximately four minutes of inactivity. This feature is only active

during battery operation.

Dynamic Weighing

1. With platform empty, press the UNITS

Cal

button until the

indicator • flashes next to the desired measuring unit.

2. Place a mass on the platform. The scale will show “-A-”.

NOTE: If using a container, press ON/ZERO

Off

to tare the

weight and return to zero.

3. With a mass on the platform or container, a short press of

UNITS

Cal

will start the averaging countdown from

5 seconds.

4. The averaged weight is then displayed. The indicator •

stops flashing when the process is complete.

5. The display will hold until a button is pressed.

6. To repeat the process press

UNITS

Cal

with a mass on the

platform or container.

7. To Exit, remove the mass from the platform or container and

press

UNITS

Cal.

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EN-8 SD SERIES BENCH SCALE

Calibration

For best results, calibrate the scale at regular intervals. (Calibration weights are not

supplied with the scale.)

CAUTION

USE EXTREME CARE WHEN HANDLING CALIBRATION WEIGHTS

AS THEY ARE VERY HEAVY. IMPROPER LIFTING METHODS OR

MISUSE OF CALIBRATION WEIGHTS MAY RESULT IN PERSONAL

INJURY. MULTIPLE WEIGHTS MAY BE USED TO EQUAL THE

REQUIRED CALIBRATION WEIGHT.

1. Allow the scale to warm up and stabilize for a least two minutes before

commencing the calibration procedure.

2. To select the weighing unit to be used for calibration, press the UNITS

Cal

button until the correct unit is displayed.

NOTE: The calibration process can be stopped at any time by pressing the

UNITS

Cal

button or by turning the scale off. The correct span calibration

weights will need to be available before starting the calibration (see

specification table). Calibration is unavailable in Dynamic Weighing Mode.

3. Press and hold the UNITS

Cal

button until “CAL” is displayed.

4. With the platform empty, press the ON/ZERO

Off

button to

capture the scale zero. The display will show “-C-”

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SD SERIES BENCH SCALE EN-9

5. After the zero is captured, the required span calibration

weight in the selected unit is displayed.

6. Place the calibration weight on the platform and press

ON/ZERO

Off

button. The display will again show “-C-”.

7. After span capture, the display will return to the normal

weighing mode.

NOTE: The message “CAL E” will appear if an incorrect calibration weight

was applied. Repeat the procedure using the correct calibration weight.

Calibration Locking: By use of an internal switch, the calibration function may be

locked (disabled), and unauthorized recalibration prevented.

1. With the scale powered off, remove the back housing section of the indicator

by unscrewing the four screws at the bottom.

2. Slide the switch on the PCB (marked SW3) to the position marked “CAL LOCK”.

3. Reassemble the housing.

4. If required, place tamper evident sealing labels over the screw holes or over

the housing edges.

If later recalibration is required, the housing will need to be reopened and the lock

switch returned to the original position.

NOTE: When the lock switch is set to the CAL LOCK position, the power-on zero

range is reduced to 10% of full capacity.

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EN-10 SD SERIES BENCH SCALE

Model SD35 SD75 SD200

Capacity x Readability 35 x 0.02kg

77 x 0.05lb

75 x 0.05kg

165 x 0.1lb

200 x 0.1kg

440 x 0.2lb

Weighing Units kg, lb

Modes Simple Weighing, Dynamic Weighing

Calibration Weights 25kg/50lb 50kg/100lb 100kg/200lb

Stabilization Time Within 3 seconds

Zero Range To capacity by subtraction

Maximum Overload 150%

Error Indications: “E”

“CALE”

“UnSt”

“ErrE”

“Lo bat OFF”

“Lo Line OFF”

- Over load, Under load, Power on Over/Under load

- Calibration Error

- Unstable at Power on

- Memory Error

- Low battery shut down

- Low line voltage shut down (Power Adapter)

Underload Indication Negative value

Auto Shut-Off 4 minutes no activity (battery operation only)

Battery Operating Time 360 hours

Operating Temperature

Range

41° to 104° F / 5° to 40°C at 10% to 80% relative humidity,

non-condensing

Cable Length 1.8m / 72” (uncoiled)

Display 4 Digit, LCD, 0.8”/20mm high

Scale Base Size 316mm L x 280mm W x 45mm H /

12.4” x L x 11” W x 1.77” H

Indicator Size 210mm L x 91mm W x 39mm H / 8.27” L x 3.58” W x 1.54” H

Battery power requirements 3 “C” Alkaline batteries (LR14)

AC Adapter 9-12 Volt DC, 100mA

Net Weight

2.6kg / 5.8lb

3.3kg / 7.3lb

Shipping Weight

3.7kg / 8.1lb

4.3kg / 9.5lb

Shipping Carton Size

380mm L x 100mm W x 465mm H / 15” L x 3.94” W x 18.3” H

Specifications (Standard Base Models)

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