>0< On/Off/Zero
Press this key to turn the scale on. This key is also used to rezero
the display. To turn the scale off, press and hold this key until the
display indicates OFF, then release.
Unit/Cal
Press this key to change the weighing unit. Press and hold to
begin calibration.
Weighing
Slide the pan/cover to Weighing until it locks into position. Place
the scale on a firm level surface. Turn the scale on. When the *
symbol is displayed the scale is ready for use. Place sample on
the pan and read the displayed result. The * indicator appears
when the reading is stable. If using a container, press
>0<
to tare
the container before adding material. If the capacity of the scale is
exceeded, an E will appear on the display and the load should be
removed immediately.
Calibration
Refer to Specifications for the correct calibration weights.
1. Press and hold
Unit/Cal
until “CAL” is displayed, then
release it.
2. Press
>0<
. The required weight will appear in grams.
3. Place the appropriate weight on the pan, then press
>0<
4. “PASS” will be displayed when calibration is complete.
Note
::::: If “CAL E” is displayed a calibration
error has occurred (for example, an in-
correct weight was used or the pan was
disturbed). Repeat the procedure.
Operation
This is a precision weighing in-
strument, handle with care.
Slide the pan/cover as shown to
expose the display and keys.
The pan/cover can slide to ei-
ther Weighing or Storage
positions.
NOTE
: For Weighing, slide pan/
cover all the way until a click is
heard (pan locks into weighing
position). Do not apply exces-
sive force when sliding the pan,
and do not press on the pan or
try to remove it.
Once pan is locked into Weighing position, the scale is ready for
use. Batteries are already installed.
To access the batteries, slide the pan/cover
to battery position as shown and press
the release tab. Install battery with (+)
facing up.
Specifications
Model
PS121T
PS251T
Capacity (g)
120
250
Readability (g)
0.1
0.1
Calibration weight
100g
200g
Weighing Units
g, thk, tsg, trc
Tare range
to capacity by subtraction
Stabilization time
2 seconds
Optimum operating temp.
65° - 77°F/18° - 25°C
Power requirements
2-CR2032 Lithium batteries (included)
Auto Shut-off
2 minutes no activity
Overload indication
[E]
Register your scale under
Warranty Registration at www.ohaus.com
