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Fully automatic blood pressure
monitor for the upper arm
Instruction manual
GT-868UF
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Information You Should Know
Before Operating the Unit ...................................... 19
About the Unit
Explanation of Displays ......................................... 21
Preparation for Use
Installing/Replacing Batteries ................................ 21
Attaching the Pressure Cuff .................................. 22
Posture during Measurement ................................ 23
Operations
Setting the Time and Date .................................... 24
Measuring Blood Pressure .................................... 24
Storing Data
Recalling Data ....................................................... 25
Erasing Data .......................................................... 26
Care and Maintenance ............................................ 26
Specifi cations .......................................................... 28
Error Messages ....................................................... 29
Quality Standard ..................................................... 29
Caution
1. Consult your physician to verify your blood pressure
range before measuring it at home with this unit.
2. If the cuff causes any discomfort during measurement,
press the start/stop button to turn off the
unit immediately.
3. If the pressure is over 300mmHg and the cuff does not
defl ate automatically, pull off the velcro strap to detach
the arm cuff.
Blood pressure measurements obtained with this unit
are equivalent to those obtained by a trained
person using the cuff/ stethoscope auscultation method.
Geratherm easy med is not intended for professional
use.
WARRANTY: 3 years from the date of purchase.
Contents
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Information You Should Know Before
Operating the Unit
What is blood pressure?
A force is created by the heart as the ventricle forcibly
ejects blood into the blood vessels and through the vascular system. Another force is created by the arteries as
they resist the blood fl ow. Blood pressure is the result of
these two forces.
Is my blood pressure normal?
See the following blood pressure classifi cation chart re-
leased by the WHO (World Health Organization) for eva-
luation of your blood pressure level.
Severe hypertension (Grade 3)
Moderate Hypertension (Grade 2)
Mild Hypertension (Grade 1)
Optimal
Normal
Boarderline
Classifi cation of
blood pressure
monitor
Systolic
mmHg
Diastolic
mmHg
Color
indicator
Optimal < 120 < 80 green
Normal 120 - 129 80 - 84 green
High - Normal 130 - 139 85 - 89 yellow
Phase 1
Hypertension
140 - 159 90 - 99 red
Phase 2
Hypertension
160 - 179 100 - 109 red
Phase 3 Hypertension
>= 180 >= 110 red
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LCD DISPLAY
SET BUTTON
RECALL MEMORY BUTTON
MODE BUTTON
START/STOP BUTTON
Cuff connection
ARM CUFF
(AA) 1,5 V x 4
Alkaline Batteries
What about low blood pressure?
In general, a lower blood pressure reading is better un-
less it causes unpleasant symptoms such as fainting and/
or lightheadedness.
What are systolic and diastolic pressures?
Systolic pressure is the highest pressure at the height of
the heart’s contraction. Diastolic pressure is the lowest
pressure when the heart is resting.
Fluctuation and variation in blood pressure
The following factors will infl uence blood pressure measure-
ment results and cause variations.
Bathing, Breathing, Conversation, Drinking alcohol,
Exercise, Moving, Mental tension, Eating, Temperature
changes, Thoughts, Smoking etc.
About the unit
Information You Should Know Before Operating the Unit
The cuff is designed to fi t arm diameters between
23 and 33 cm / 8.7 - 12.6 inches.
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About the unit
Explanation of the display
Preparation for Use
Installing/Replacing Batteries
1. Insert the batteries into the battery compartment matching correct polarities “+” and “-”.
2. Replace all batteries if the low battery indicator appears .
3. Remove the batteries if the unit will not be used for a
long period of time.
4. REMOVE all of the BATTERIES when utilizing an AC
adapter.
Note:
It is recommended that the same type of alkaline batteries
be used to avoid incompatibility.
Systolic
rate
Diastolic
rate
Puls rate
Low
battery
Error
icon
Icon for
users
1, 2, 3
Pulse symbol
WHO pressure
bar indicator
Number of
memory space
Irregular
heartbeat
detector
Hour:Minute
Day/Month
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Please dispose of defective appliances and used batteries in compliance with statutory regulations
(disposal in general household waste is prohibited!).
Attaching the Pressure Cuff
1. Wrap the cuff around the left arm. The arm should be
bare.
2. Fasten the cuff. Don’t pull it too strongly or make the
cuff too tight. The edge of the cuff should be approximately 1 inch from the crease of your elbow.
3. Attach the cuff on the right arm as shown in the fi gure
if it is not possible to measure on the left arm.
Preparation for Use
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Preparation for Use
Posture during Measurement
1. Sit upright and ensure that the measuring site is at
heart level. Relax and retain a natural posture during
measurement.
2. Measure and record blood pressure at the same time
every day to establish your blood pressure pattern.
AC Adapter
It is possible to use a stabilized AC adapter (output 6 V
DC/800 mA) to operate the device.
Note:
1. No power is taken from the batteries while the AC adapter is connected to the device.
2. If AC adapter power is interrupted during measurement, the device must be reset by disconnecting the
AC adapter from the device.
3. Please consult an appropriate dealer if you have questions relating to the adapter.
Power Source
4 alkaline “AA” type batteries (1.5 V)
or stabilized AC/DC adapter
6 V DC 800 mA
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Operations
Setting the time and date
1. Press “SET” button to select memory store 1, 2,
or 3.
2. Press “MODE” button (“month” starts fl ashing). Press
“SET” button to set the correct month.
3. Press “MODE” button again (“date” starts fl ashing).
Press “SET” button to set the correct date.
4. Press “MODE” button again (“hour” starts fl ashing).
Press “SET” button to set the correct hour in 12-hour
format.
5. Press “MODE” button again (“minute” starts fl ashing).
Press “SET” button to set the correct minute.
6. Press “MODE” button again to confi rm the time and
date.
Measuring Blood Pressure
1. Wrap the cuff around the arm (refer to „Attaching the
Pressure Cuff“).
2. Sit upright on a chair (refer to „Posture during Measurement“).
3. Press “SET” button to select a particular memory store
number.
4. Then press “START/STOP” to start automatic measurement.
When taking repeat measurements, be sure to select the
same memory store number before pressing „START/
STOP“.
5. The cuff is infl ated. When the pulse is detected, the
PULSE symbol will start fl ashing.
6. After the measuring procedure has been completed,
the blood pressure values (systolic pressure and diastolic pressure) along with the pulse rate and WHO
classifi cation indicator will be shown on the display for
1 minute. After approx. 1 minute without being used,
the unit will automatically switch off.
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Operations
Arrhythmia-Detection:
If the symbol appears, it means the unit has detected
an irregular pulse during measurement. If the symbol
appears regularly please consult a qualifi ed physician for
professional advice.
Storing data
After each blood pressure measurement, the blood pressure values, pulse rate, time and date will be automatically stored. Each of the three memory stores saves the
latest 30 measurements. If more than 30 measurements
are saved, the memory will automatically delete the ear-
liest values.
Recalling data:
1. Press the “MEMORY” button. A particular memory
store will appear on the display.
2. Press “SET” to fi nd the correct memory store.
3. Press “MEMORY”. The average value of the last three
measurements is shown by the following symbol: .
If no values have been stored, nothing will appear on
the display. The most recently measured value will be
displayed fi rst.
4. By pressing the “MEMORY” button again you can
view each of the saved values in the selected memory
store.
5. After viewing the saved measurements, press “MEMORY” again to switch back to the initial display.
6. You can also switch back to the initial display by pressing the “START/STOP” button.
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Storing data,
Care and Maintenance
Erasing data:
1. To erase the stored values, remove all 4 batteries from
the device and then put them in again, taking care to
ensure correct polarity.
2. To check that the data has been erased, press the
“MEMORY” button. No values should show up on the
screen.
Care and Maintenance
Do not drop the unit. It is not
shock-proof.
Do not modify or disassemble the unit or the arm cuff.
Do not twist the arm cuff.
Use a cloth moistened with
water or neutral detergent to
clean the body of the unit
and then wipe it dry.
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Care and Maintenance
Avoid thinner, benzine,
and other harsh
cleaners.
Keep the unit in a
suitable place.
Avoid high temperature,
direct sunlight,
high moisture, and dust.
Remove the batteries if
the unit will not be
used for a long time.
Do not press the
POWER button if the cuff
has not been
properly wrapped around
the arm.
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Specifi cations
Display System Liquid Crystal Display
Measuring
Method
Oscillometric
Power Source
4 alkaline “AA” type batteries
(1.5V) or AC/DC adapter
Measuring
Range
0 - 300 mmHg
40 - 199 pulse beats per minute
Accuracy
±3mmHg
±5% pulse rate
Infl ation Micro centrifugal pump
Defl ation Electromagnetic valve
Memory
3 memory stores with 30 storage
spaces each = total 90 stored
values
Display
LCD (year/date/time, pressure and
pulse rate)
Low Battery
Indicator
yes
Automatic
switch-off
after approx. 1 minute
Battery Life around 300 operations
Operating Envi-
ronment
+10°C – +40°C; RH≤85%
(+50°F – +104°F)
Storage Envi-
ronment
-20°C – +70°C; RH≤85%
(-4°F – +158°F)
Dimensions 150 x 100 x 65 mm
Weight approx. 265g
(including batteries)
Specifi cations are subject to change without notice for
purposes of product improvement.
It is recommended that the unit be calibrated by an authorised laboratory every two years.
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Error Message,
Quality Standard
Replace batteries: Replace all 4 batteries
with new ones. Insert the batteries in correct
polarities.
EE Appears when measurement error oc-
curs or blood pressure value is displayed
excessively low or high: Measure again.
Wrap the cuff correctly and keep the arm still
during measurement.
E1 Cuff tube may not be plugged into mo-
nitor correctly: Check cuff connection.
Measure again.
E2 Pressure exceeds 300 mmHg: Turn the unit
off to clear, then measure again.
E3 Measurement data that result in an
error message: Measure again.
Quality Standard
Geratherm® is certifi ed in accordance with Council Direc-
tive 93/42/EEC, Annex II and DIN EN ISO 13485 and
is entitled to affi x the CE-mark CE 0118 (Notifi ed Body:
LMET).
The blood pressure monitor conforms to EN 1060-1
(Non invasive sphygmomanometers part 1: General
requirements) and EN 1060-3 (Non invasive sphygmomanometers part 3: Supplementary requirements
for electromechanical blood pressure measuring
systems).
Manufacturer:
Geratherm Medical AG
Fahrenheitstr. 1
98716 Geschwenda
Germany
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