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BATTERY CHARGING
The rechargeable battery in this scale is similar to the
no-maintenance lead-acid batteries used in automobiles.
Since the battery is sealed, no checking of water level
or adding of water to the battery is necessary. However,
recharging at proper intervals and proper storage
procedures are necessary, similar to an automobile
battery. A fully charged battery will provide approximately
250 normal weighings before requiring recharging.
When the display flashes “Lo-b,” the battery needs to
be recharged.
Charging the Battery
A. Plug the battery charger power cord into the 3-prong
jack on control panel box. Secure by turning the
knurled ring.
B. Plug the battery charger into a 120 VAC outlet.
C. The battery will fully charge in 8 hours. THE SCALE
MAY BE USED WHILE THE BATTERY IS CHARGING.
NOTE: The specially designed charger built into this scale
prevents the battery from being overcharged. Use of a
charger or adapter other than the one designed for this
scale can result in SERIOUS DAMAGE TO THE SCALE
OR BATTERY.
Optimum battery life will be obtained if the scale is
operated and stored connected to 120 VAC. Always check
the plug to see if the scale is charging before moving.
STORAGE: When storing the scale for an extended
period of time (and the unit is not connected to a 120
VAC), the battery should be fully charged. The battery
should then be charged every three months. A
discharged battery should be recharged as soon as
possible to prevent its useful life from decreasing
significantly. A discharged battery left in the scale can
leak and cause permanent damage to the battery and
scale. Store the unit in a cool, dry place.
PRODUCT DESCRIPTION
Control Panel Box
The 4521 control panel keypad has four membrane
switches. The POUNDS, KILOS, and ZERO switches
have both primary and secondary functions listed below.
Only the primary functions are listed on the switch.
Special Features
Tanita Corporation’s electronic scales come standard with
these special features:
1. Autozero: The scale will automatically display “0” when
turned on. If a foreign object is placed on the platform
before turning the scale on, it will automatically zero
out that object’s weight.
2. English-Metric Readout: You may switch between
metric (kilos) and English (pounds) readouts before or
after a reading, and the scale will convert one reading
to the other.
3. Recalculate Weight: If the first reading of a patient’s
weight is suspect, a second reading can be taken
without removing the patient from the scale. To reweigh
the patient, simply depress the Zero switch.
4. Average Weight: In most cases, the 4521 Scale
displays an actual weight based on a series of
consistent stable measurements. However, if the
wheelchair/patient keeps moving, the scale may not
get the readings required to give a “stable weight.” In
these instances an average weight can be determined
by activating the Average Locking feature. Depress the
Pounds (or Kilos) switch (dependent upon
measurement preference). The indicator light should
start flashing. A weight should appear in place of the
moving dashes. Depress the Pounds or Kilos switch
again to deactivate the feature.
5. Zero Ability: The operator can “zero out” the weight of
a blanket, etc., upon which a patient is to be weighed.
Switch
On/Off
Kilos
Pounds
Zero
Primary Function
Depress to turn scale
on or off.
Depress to display
weight in kilograms
(light over switch will
illuminate to indicate
kilogram mode).
Depress to display
weight in pounds
(light over switch will
illuminate to indicate
pounds mode).
Zeros readout
(zeros out the weight
of foreign object,
e.g. blanket placed
on platform).
Secondary Function
While in Kilos mode, depress for average
reading when excessive movement
prevents stationary measurement.
Depress after any reading to “lock”
reading. Reading remains displayed for
approximately 1 minute after patient is
removed from scale, or until switch is
depressed again. Kilos light will flash to
indicate average or locked reading.
Depress while in Pounds mode to
average reading.
Depress after any reading in pounds
mode to “lock” in reading.Light will flash
to indicate average or locked reading.
Depress after initial weight is taken to
reweigh individual.
3
Keypad
63911
ZERO
POUNDS
KILOS
ON
OFF
Pounds
Kilos
www.tanita.com
Push “ON” button
and wait until zero
appears before
stepping on scale
WEIGHT