Seca 644 Series User manual

seca 644
Instruction manual and guarantee
Mode d’emploi et garantie 36
Manuale di istruzioni e garanzia 52
Manual de instrucciones y garantia 68
D
GB
F
I
E

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1. Congratulations!
In the seca 644 scale with standing aid,
you have purchased a high-precision yet
sturdy piece of equipment.
seca has been putting its experience at
the service of health for over 150 years
now, and as market leader in many coun-
tries of the world, is always setting new
standards with its innovative develop-
ments for weighing and measuring.
In accordance with national regulations, the
seca 644 scale with standing aid is used
primarily in hospitals, doctors’ surgeries
and in-patient nursing facilities.
The weight display can be switched be-
tween kilogrammes (kg), pounds (lbs) and
stones (sts). Weight is determined within a
few seconds. Weight is determined within
a few seconds.
In addition to the conventional determina-
tion of weight, the seca 644 also has a
function for determining body mass index.
For this purpose, height is entered on the
keypad and the body mass index associ-
ated with the weight value is output.
You can use the pre-Tare function to
record the weights of, e.g. three types of
chair. This weight is automatically deduct-
ed in the weighing operation.
The large, secure standing aid also ena-
bles persons who are unsteady on their
feet to stand safely on the scale.
The scale is of a very sturdy construction
and will give you long and loyal service. It
is easy to operate and the large display is
easy to read.
The seca 644 can be moved on castors
and its low power consumption combined
with its rechargeable batteries mean it will
provide long, mobile service.
2. Safety
Before using the new scale, please take a little time to read the following safety instruc-
tions.
• Follow the instructions in the instruc-
tions for use.
• Keep the operating manual and the
declaration of conformity contained
therein in a safe place.
•Take measures to ensure that persons
who have difficulty walking do not fall
over when using the scale.
•The scale must be used with care. The
upper surface may be slippery if wet!
• After moving the scale, please lower
the scale slowly to the operating height.
• Do not drop the scale or subject it to
violent shocks.
•Be sure to use only the seca mains unit
supplied. Before plugging the mains
unit into a socket, check that the mains
voltage indicated on the mains unit
matches local mains voltage.
•When using the scale with a mains unit,
ensure that the supply cable is routed in
such a way as to exclude any type of
tripping hazard.
•Have repairs carried out only by author-
ised persons.

Model 644 21
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3. Before you start…
Unpacking
–Remove the packaging, although leave the display head attached to the column. Place
the scale platform on a solid, flat surface.
The scope of supply includes:
•Side section with two columns and the
display head attached for transport
• Side section with one column
• Scale platform
• Railing
• Cover for the wheel casing
• Cover for the side casing
•2triangular covers right/left
• Display mount
• Set of assembly bolts
• Allan key, size 6
• Phillips screwdriver size 1 and size 3
•1screwdriver
•1seca mains unit
•1set of operating instructions

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Assembling the scale
Step 1: Assemble the first side section
You will need the following bolts:
–Position the side section on the right-
hand side of the scale platform.
–Bolt the side section to the scale plat-
form using two Allan bolts.
–Use an Allan bolt to attach the triangular
reinforcement to the scale platform.
Step 2: Assemble the side section with the wheel casing
You will need the following bolts:
–Position the side section with the wheel
casing on the rear side of the scale plat-
form.
–Bolt the side section to the scale plat-
form using two Allan bolts.
3 x Allan bolts M5
3 x Allan bolts M5 1 x Sheet metal bolt, ø 6,3 mm

Model 644 23
GB
–Use an Allan bolt to attach the triangular
reinforcement to the scale platform.
–Use the sheet metal bolt to attach the
two side sections to the central column.
Step 3: Assemble the railing
You will need the following bolts:
–Position the railing on the three col-
umns. The large bore holes must point
downwards, and must be inserted into
the heads of the columns.
–Use an oval head bolt to attach the rail-
ing to the two outer columns.
1 x Allan bolts M6 2 x Oval head bolt M6

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–Place the display mount with the peg-
shaped end over the central column on
the railing.
–Turn the display mount until the peg
clicks into place.
–Screw the display mount tightly into
place using the Allan bolt.
Step 4: Assemble the display head
You will need the following bolts:
–Remove the transport protection from
the display head.
–Position the display head over the dis-
play mount in such a way that the posi-
tion markers are aligned.
–Use the three Allan bolts to attach the
display head to the display mount.
3 x special Allan bolt, ø 2,5 mm
Markers

Model 644 25
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Step 5: Assemble the side section covers
You will need the following bolts:
–Place the scale on its side, with the rear
side section facing upwards.
–Position the cover with the wheels over
the side section, and attach this secure-
ly using 5 Phillips bolts:
3 x from below, and
2 x from above.
–Position the cover on the reinforcing tri-
angle, and bolt this firmly in place using
two bolts.
–Now turn the scale over so that the oth-
er side faces upwards.
–Position the cover with the recess
pointing inwards over the side section,
and attach this securely using 5 Phillips
bolts:
3 x from below, and
2 x from above.
–Position the cover on the reinforcing tri-
angle, and bolt this firmly in place using
3 bolts.
Step 6: Assemble the electrical connections
–Connect the cable which comes out of
the central column to the electronic box
socket. In order to prevent measure-
ment errors, lay the cable as shown in
the diagram.
–Unscrew the bolts which secure the lid of
the battery compartment, and remove.
–Connect the plug with the rechargeable
battery block located in the battery
compartment.
–Replace the lid of the battery compart-
ment, and bolt this firmly in place.
– Turn the scale to the upright position.
16 x Phillips bolts, ø 3,5 mm
Recess
Plug

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Power supply
The scale is powered by a mains unit and by rechargeable batteries. The scale works in-
dependently of the mains, which is very handy for mobile use.
The LC display and the evaluation electronics have a low power consumption – 2,000
weighing operations can be performed with a fully charged battery. Once battery voltage
is no longer adequate, the battery symbol first appears in the display to indicate
that battery power is dropping. If the batteries are not charged, battery voltage will ulti-
mately not be adequate for error-free measuring. In this case, bAtt appears in the display
and weighing is no longer possible.
The rechargeable batteries are charged by
the mains unit supplied. For this purpose,
the mains unit needs to be connected to
the mains for at least 24 hours.
4. Setting up and aligning the scale
– Place the scale on a level surface.
–Undo the locknuts using the four foot
screws (1).
–Align the scale by undoing the foot
screws. The air bubble in the spirit level
must be right in the centre of the
circle (2).
– Then re-tighten the locknuts (3).
–Ensure that only the feet of the scale are
in contact with the floor. The scale may
not be in contact at any other point.
Important!
The alignment of the base of the scale must be checked and corrected if neces-
sary every time the location of the scale is changed.
1.
2.
3.
Libelle
spirit level

Model 644 27
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5. Operation
Controls and displays
The controls and the display are on the display head on the column.
Switch scale on and off
press briefly sswitch between kg and lbs
hold down sswitch between kg and sts
in function menu sincrease value, scroll
press briefly sactivate hold function
hold down sset display to zero, activate/deactivate tare function
in function menu sdecrease value, scroll
Activate BMI or pre-Tare function, and confirm key for entries
In order to ensure that the display can be
read from different positions, the display
head can be rotated 180° in both
directions.

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Correct weighing
– Press the Start key.
SE(a, 8.8.8.8.8. and 0.00 appear consecu-
tively in the display. The scale is then auto-
matically set to zero and ready to use.
–If necessary, switch the weight display
(see page 28).
–Ask the patient to mount the scale.
Once on the scale, the patient should
stand still.
–Read the weighing result off the digital
display.
–If a load greater than 300 kg or 660 lbs
is placed on the scale, St0P appears in
the display.
–To switch off the scale, press the Start
key again.
Switching the weight display
The weight display can be switched between kilogrammes (kg) and pounds (lbs) or be-
tween kilogrammes (kg) and stones (sts).
–Switch on the scale using the green
Start key. Weight is initially displayed in
the last setting selected.
–To switch the weight display between
kilogrammes and pounds, press the kg/
lbs/sts key.
– The kg or lbs display lights up.
–To switch weight display between
pounds and stones, hold down the
kg/lbs/sts key for approx. 2 seconds.
The lbs or sts display lights up.
Automatic switch-off/economy mode
The scale automatically detects whether it is being operated on rechargeable batteries
alone or whether it is connected to the mains.
– With rechargeable battery operation: automatic shut-down after 5 minutes.
– With mains operation: shut-down only via keypad.

Model 644 29
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Taring weight display (TARA)
The Tare function is very useful if an additional weight, e.g. that of a chair, is to be ignored
for weighing purposes.
Proceed as follows:
– Press the green Start key.
–First place the additional weight (e.g.
the chair) on the scale and activate the
Tare function by pressing and holding
the HOLD/TARE key.
The display is reset to zero. 0.0 appears in
the display. The note “NET” appears.
–Now place the patient on the scale. The
patient may remain seated.
The scale determines the patient’s weight.
You can now perform as many weighing
operations as you like.
–Hold the key down again to deactivate
the Tare function; the scale is then back
in normal weighing mode and the tare
value has been erased.
–The tare value is likewise erased by the
scale being switched off.
Store weight value (HOLD)
You can also continue displaying the weight determined once the load has been removed.
This makes it possible to look after a patient first, before having to note the weight.
–Press the HOLD/TARE key whilst the
load is on the scale.
“HOLD” appears in the digital display. The
value is stored until the scale switches off
automatically.
–The HOLD function can be switched off
by pressing the HOLD key again.
0.0 appears in the display if the scale has
no load on it, otherwise the current weight.
The “HOLD“ display vanishes.
Note:
The HOLD and TARE functions can also be used simultaneously.

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Body-Mass-Index (BMI)
Body Mass Index puts height and weight in relationship to one another, providing more
accurate information than ideal Broca weight, for example. A tolerance range is given
which is considered ideal for health. The Body Mass Index applies only to adults: these
values are not relevant to children and young people.
Three body sizes can be stored.
– Press the Start key.
se(a, 8.8.8.8.8. and 0.0 appear con-
secutively in the display. The scale is
then automatically set to zero and ready
for operation.
– Press the FUNC key.
–On the display, you will see the last
height entered.
–Use the arrow keys to select the BMI
function FU 1. Activate the function by
pressing the FUNC key once again.
–An arrow on the left-hand side of the
display indicates which memory is se.
–Use the arrow keys to select the mem-
ory position under which you wish to
record – or under which you have al-
ready recorded – the patient’s height.
–Press the FUNC key again.The pa-
tient’s recorded height will then appear
on the display.
–You can change the value in 1 cm incre-
ments using the arrow keys.
–Once the correct value is set, press the
FUNC key again. The BMI function is
now activated.
–Ask the patient to mount the scale.
Once on the scale, the patient should
stand still.
–Read off the BMI on the digital display
and compare it with the categories on
page 31.
–Press an arrow key if you would like to
see the weight briefly.
–To return to normal weighing mode,
press the FUNC key.
–To switch off the scale, press the Start
key again.

Model 644 31
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Evaluating Body Mass Index:
Compare the value determined with the categories shown below.
• BMI below 18:
Warning, this patient weighs too little. There could be a tendency to anorexia. An in-
crease in weight is recommended to improve well-being and performance. If in doubt,
consult a specialist.
• BMI between 18 and 20:
Patient is at lower weight limit. If he feels well and is completely healthy, his weight can
stay as it is.
• BMI between 20 and 25:
The patient is of a normal weight. He can stay as he his.
• BMI between 25 and 30:
The patient is slightly to moderately overweight. He should cut his weight if he is al-
ready ill (e.g. diabetes, hypertension, gout, fat metabolism disorders).
• BMI over 30:
Weight reduction is essential. Metabolism, cardiovascular system and bones are all un-
der strain. A consistent diet, plenty of movement and behavioural training are all rec-
ommended. If in doubt, consult a specialist.
Weighing with pre-Tare
If the pre-Tare function is activated, a stored weight value is deducted from the currently
measured weight. This function can be useful, for example, when the patient and the carer
mount the scale together, and the weight of the carer is not meant to be shown.
Three different tare weights (carer weights) can be stored.
– Press the Start key.
se(a, 8.8.8.8.8. and 0.00. appear con-
secutively in the display. After that, the
scale is automatically set to zero and
ready for operation.
– Press the FUNC key.
The last function used appears in the
display.
–Use the arrow keys to select the pre-
Tare function FU 3. Activate the function
by pressing the FUNC key once again.
An arrow on the left-hand side of the
display indicates which memory is set.
–Use the arrow keys to select the desired
memory for storing the additional
weight or where a weight may already
be stored.
–Then press FUNC. In the display you
will see the tare value from the memory.

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–You can alter the weight of the patient
using the arrow keys in display steps.
–Once the correct value is set, press the
FUNC key again.
– The pre-Tare function is now activated.
–Mount the scale together with the pa-
tient. Read the weighing result off the
digital display.
–Press an arrow key if you would like to
see the current weight value briefly.
–To return to normal weighing mode,
press the FUNC key.
–To switch off the scale, press the Start
key again.
Setting damping
Damping is useful for reducing weight determination malfunctions (due to patient move-
ments, for example). The stronger the damping, the more slowly the weight display re-
acts. You can set damping to suit requirements.
–Press the FUNC key and keep it de-
pressed for 2 seconds.
FIL and the current setting appear in
the display:
0 = slight damping
➞fast determination of weight
1 = average damping
➞normal determination of weight
2 = strong damping
➞slow determination of weight
–Press an arrow key if you want to
change the set value.
–Press the FUNC key again to store the
displayed value. The scale is then back
in normal weighing mode.
The settings are retained even once
the scale is switched off.

Model 644 33
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6. Moving the scale
For mobile deployment in a ward, the scale
can be tipped backwards and moved
about on the rollers.
Important!
The alignment of the base of the scale
must be checked and corrected if nec-
essary every time the location of the
scale is changed.
7. Maintenance
Clean the rubber surface and the housing as required using a domestic cleaning agent or
commercially-available disinfectant. Follow the manufacturer’s instructions.
Under no circumstances use abrasive or acid cleaners, white spirit, benzene or the like for
cleaning. Such substances can damage the high-quality surfaces.
8. What do I do if…
… no weight display comes on?
– Is the scale switched on?
– Check the mains connection and the connection of the battery pack.
– Is the plug contact for connecting the display to the scale correctly connected?
–Switch the scale off for a few seconds. This can be done by opening the plug connect-
ed to the rechargeable battery block and unplugging the mains supply from the scale.
… 0.0 does not appear before the weighing operation?
–Press the Start key again – there must not be any load on the scale – and only its feet
should be in contact with the floor.
… one segment is illuminated constantly or not at all?
– The relevant segment has a fault. Inform Servicing.
… the display shows ?
– Battery voltage is dropping. Charge the rechargeable batteries in the next few days.

34
… batt appears in the display?
–The rechargeable battery is so severely discharged that weighing is no longer possible.
Recharge the battery.
… St0p appears in the display?
– Maximum load has been exceeded.
… the display flashes?
–If you have just activated the Hold or Tare function, please wait until the scale has de-
tected a steady weight value. The display will then stop flashing.
–If there has been no activation of a function beforehand, remove the load from the scale
and wait until 0.0 is displayed, then weigh again.
… the display shows ?
–The ambient temperature of the scale is too high or too low. Place the scale in an
ambient temperature between +10 °C and +40 °C. Wait about 15 minutes for the
scale to adapt to the ambient temperature and then weigh again.
… the display Eand a number appear?
–Switch off the scale with the Start key and start the scale again. The scale will then
work normally again.
If this is not the case, interrupt the power supply by briefly removing the rechargeable
battery. If this measure is equally unsuccessful, inform the Service department.
9. Maintenance
Your seca scale leaves the factory with an accuracy greater than ± 0.15 %. To ensure that
this accuracy is maintained, the product must be carefully set up and regularly maintained.
Depending on the frequency of use, we recommend servicing every 3 to 5 years. Please
ensure that a qualified service agent is used. If in doubt, contact seca Customer Service for
further information.
10.Technical data
Dimensions: (width, length, height) 750 x 750 x 1140 mm / 30 x 30 x 45 inch
Size of platform 600 x 600 mm / 23.6 x 23.6 inch
Height of platform 45 mm / 1.77 inch
Weight approx. 24 kg / 53 lbs
Temperature range +10 °C to +40 °C
EN 60 601-1:
insulated equipment, Protection Class II
medical electrical equipment type B
Accuracy greater than ± 0,15 %
Colour white/black
Maximum load 300 kg / 660 lbs / 47 sts

Model 644 35
GB
Graduations
seca 644, no. 1321 009 and 644 1321 109 100 g / 0.2 lbs
seca 644, no. 1321 139 (USA) 0.1 lbs / 100 g
Power supply: model dependent mains unit
and built-in rechargeable battery pack
11.Spare parts and accessories
Rechargeable batteries seca spare part no.: 68-22-12-721
Model dependent mains unit
Description: plug-in mains unit
230 V~/50 Hz/12 V=/130 mA seca spare part no.: 68-32-10-252
Description: desk-top mains unit, switchable
115 V~/230 V~/50 Hz/9 V=/350 mA seca spare part no.: 68-32-10-243
Description: plug-in mains unit,
USA: 12 V / 150 mA seca spare part no.: 68-32-10-259
12.Disposal
Rechargeable batteries
Do not throw old rechargeable batteries
into the domestic refuse! Ensure that re-
chargeable batteries are properly dis-
posed of at local collection points.
Disposing of the scale
If the scale can no longer be used, the re-
sponsible waste disposal association will
be glad to advise you on the measures
necessary to dispose of it properly.
13.Warranty
A two-year warranty from date of delivery
applies to defects attributable to poor ma-
terials or workmanship. All moveable parts
- batteries, cables, mains units, recharge-
able batteries etc. - are excluded. Defects
which come under warranty will be made
good for the customer at no charge on
production of the receipt. No further
claims can be entertained. The costs of
transport in both directions will be borne
by the customer should the equipment be
located anywhere other than the custom-
er’s premises. In the event of transport
damage, claims under warranty can be
honoured only if the complete original
packaging was used for any transport and
the scale secured and attached in that
packaging just as it was when originally
packed. All the packaging should there-
fore be retained.
A claim under warranty will not be hon-
oured if the equipment is opened by per-
sons not expressly authorised by seca to
do so.
We would ask our customers abroad to
contact their local sales agent in the event
of a warranty matter.