HH120 Digital Scale by Ohaus

Online Instruction Manual
HH120 by Ohaus

The following instructions are reproduced word for word from the original instructions that were included with scales that we received from the manufacturer in early November 2003.

For best results, use the scale in the specified optimum operating temperature.
For best accuracy, perform your mass measurements in clean environments, free of electrostatic and magnetic fields, dust and dirt, moisture, vibration and air currents.
Use your scale with care, gently loading items to be weighed onto the center of the pan. Avoiding rough treatment will aid in the life of your hand-held scale.
Calibration weights are not provided with the scale.

Battery Installation
Two AAA size alkaline batteries are provided.

CAUTION: Keep the protective cover in place while installing batteries.

Remove the battery cover on the bottom of the scale and place the two "AAA" size alkaline batteries into the compartment as indicated.
Do not use excessive force or press the weighing pan.
Re-insert the battery cover.

General Product Features

Power Up Test: When the scale is turned on, all display segments will appear for approximately 3 seconds before resetting to zero.
Unit Indication: On the right side of the display, a right facing arrow will appear indicating the weighing mode in which the scale is operating.
Stable Reading Indication: On the display, a star indicator will appear in the lower left corner of the display when a stable reading has been reached.
Overload: If the applied load exceeds the capacity of the scale, an E will appear on the display and the load should be removed immediately. The scale will return to normal operation.
Zero Function: Values can progressively be added to a sample. By pressing the Zero button, the scale display returns to zero. After adding additional mass, press Zero to zero the scale again. Additional mass may be added up to the capacity of the scale.
Negative Value: When a load is removed from the scale, any zeroed value will be displayed as a negative number. To return to normal operation, the tared value can be cancelled by pressing Zero.
Auto Shut-Off: To extend battery life, the scale will automatically turn off after approximately five minutes if no active weighing is occurring.
EL Back Light: The display has an Electronic Luminescence (EL) back light source, which is activated by pressing the Light Bulb button. The back light will automatically turn off after 10 seconds.

Four Button Keypad

On/Off: Pressing this button turns on the scale. Pressing and holding this button turns the scale off.
Zero: Pressing this button operates the zero feature when the scale is on.
Unit/Cal: Press this button briefly to change the weighing unit. The following weight units may be selected: grams (g), ounces (oz), pennyweight (dwt), or troy ounces (oz t). Press and holding this button begins the calibration process.
Light Button: Pressing this button turns on the EL back light for 10 seconds.

Calibration

For best results, calibrate the scale at regular intervals. This is especially important if the scale is in use for prolonged periods.

Pressing and holding the Unit/Cal button starts the calibration process. The display should show CAL.
The calibration process can be aborted by turning the scale off.
Press the On/Off button to capture 0. The display shows -C- while the scale stores the zero load signal.
The display will show C100 where 100 is the calibration weight in grams.
Place the appropriate calibration weight on the platform.
Press the On/Off button.
The display shows -C- while the scale stores the calibration point signal.
After span capture, the scale returns to the normal weighing mode.
The message AL E then E will appear if the calibration steps are not followed or the wrong weight was used.

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