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Be careful BF-500D/500D+
40 C
Env iron me nt:+10℃ —+40℃ Doppler FHR Detector
Waterproof
4
Up not more than 4 floors OPERATION MANUAL
IPX4 Splash proof (2.0 edition)
Add: Rm.1802, Tower A, Pengdu Building,
Donghua Garden, Guimiao Rd.,
Nanshan Dist.518054, Shenzhen,
P.R.China
Tel: 0755-26713783/26713784
Fax: 0755-26495167/26713783
BESTMAN INSTRUMENT CO., LTD
Web: www.szbestman.com
Email: bestm@public.szptt.net.cn
In order to protect your right for repair
Thank you for purchasing our Doppler service, please take a few moments to
fill out the warranty card below:
FHR Detector.
Warranty Card
To ensure correct use of your Doppler, Product
Model
please read the manual thoroughly
SN：
Date of
before use. Keep the manual handy for
purchase
Warranty period
quick future reference. Thanks.
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Tel.
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BESTMAN INSTRUMENT CO., LTD
BF-500D/500D+
CONTENTS Solution:
a． Deter mine optimu m position and after
Ⅰ. Introduction …… …… … …… … … 1
about 5-10 second, to get the accurate
Ⅱ. Specification … …… … …… … ……2 FHR; turn off the unit and turn on again;
b. Ensure proper connection fully .
Ⅲ. Function … … …… … …… …… …3 c. The unit must be relocated aw ay fro m the
interference source;
IV. Equipment components …… … …3
d． Cont act the agent to re pair .
V. How to Use this Doppler… …… … 7
VI How to Maintain the Unit …… …11
Ⅶ Attention … … …… … …… … ……12
Ⅷ Shelf-life and Warranty … …… …13 Bestman reserves the right to change the
contents of this manual without notice.
Ⅸ Trouble Shooting … …… … …… …15
Considerable care was taken in preparing this
manual. If, however, you have any questions
about any part of the manual, or note mistakes
or inaccuracies, please contact us at the
address listed on the back cover.
Best man Instrument 19
BF-500D/500D+ BF-500D/500D+
I、 Introduction: a．Rechar ge the unit;
1. BF-500D/500D+ Doppler Fetal He art Rate b．Ensure sufficient gel . is used between the
(FHR) Detectors apply the ultrasonic probe and abdo me n w all;
Do ppler principle to detect the fetal he art c ． Ge ntle press on the patient to ensure
beat. The units are co mpact, lightweight ， sound connection of the probe and make
easy to operate w ith st able perfor mance patient relax;
and high depe ndability .
d. Find a better position;
2. BF-500D+ has dor mancy infor mat ion
LCD display / alar m / self -detect function e. Co ntact the age nt to replace the probe.
If left unused more than 1 minute, it w ill
sw itch to dor mancy mode to sav e power. 7、Malfunction: Digital is not stable while 500D+ is
The blue backlight LCD display make s it working.
possible that the FHR can be seen clearly Possible cause:
irrespective of the light is bright or dark, a. When dragging the probe on the abdo men
me anw hile not affecting the detection of
wall to collect the FHR, there is a faulty
heart beat.
All infor mation c an be displayed on the LCD, signal leading to the wrong display;
including the charging mode /residual power b. The probe cable connection to the unit is
indication/volume indication/ Warning of faulty ；
abnor mal FHR indication. c ．There is an interference source in the local
Self-detect mo de t o ensure that the unit is vicinity w ithin 10 m (e .g. high frequency
working nor mally .
electronic equip ment, cell /mo bile phone
3. BF-500D can hear the FHR, no display
function or cordless pho nes are w orking);
d．The Doppler is damaged.
1 Best man Instrument Best man Instrume nt 18
BF-500D/500D+ BF-500D/500D+
Solution: 4. This Doppler has Ni-MH rechargeable
a．Rechar ge the unit; battery inside, w hich can be used
repeatedly after recharging. The gallus
b．Ensure sufficient gel. is used between the can make it convenient to carry .
probe and abdo men 5. Nor mative collocation: unit, charger,
c．Use gentle pressure on the abdo men to gallus and operation manual.
6. Optional accessories: earphone, gel.
ensure sound connection of the probe;
Ⅱ 、Specification:
d. Contact the agent to buy new probe. Standard: EN61266:1995
6、Malfunction: Sensitivity is not sufficient; too low Safety Classification: BF /Class
sound to noisy to hear the FHR. Ⅱ /Internal power
Possible cause: Overall sensitivity: ≥ 90 dB
(see Annex Ⅰ)
a. The rechargeable battery is going to use out. Target velocity and display range :
b. No sufficient coupling gel; 60-210bpm. (Beat Per Minute)
c. Too much pressure is being applied to the Alarm range: <100bpm or >160bpm
pregnant wo man’s abdo me n and muscles (BF-500D+)
(Please see a doctor once the FHR is abnormal)
are not relaxed causing loud noise and 2
Output power： ≤10Mw /c m
interference EMC testing data (See annex Ⅱ)
d．The probe is not located in the optimu m Working frequency ： 2.0 MHz ± 10%
position; Spatial-peak temp-peak acoustic pressure:≤
e．Sensitivity of probe declined. 0.1 MPa.
2
Effective area of transducer:6.0±0.5 c m
Solution:
Bestman Instrument 2
17 Best man Instrument
BF-500D/500D+ BF-500D/500D+
Adapter input voltage: 230V AC
4、Malfunction: Turn on the power switch, working
Adapter input consumer(recharging) ：≤ 5VA
indicator becomes bright; but there’s no sound
Adapter output voltage (no load ) ：DC12V ±
while touching the surface of probe.
1V
Battery ：9V Ni-MH batteries Possible cause:
Audio output power ：≤1.8 W a. Volume controller is adjusted too low to
Coupling mediu m i mpedance : 1.5-1.6 hear any sound;
5 2
(10 g/c m .s) b.The rechargeable battery is near ly used out,
Doppler frequency: 0-3.0 KHz bad circuit;
Working time (after recharged): c. Probe is damage d;
BF-500D+ ≥2hours; BF-500D ≥3hours Solution:
Environme nt te mperature ：+10℃~+40℃ a．release the volume controller;
b．Char ge the unit for 8 to 12 hours;
c．Return the unit to the supplier for repair
III、Function:
This Doppler can be used to detect the Fetal 5 、 Malfunction: uncomfortable noise is heard
He art Rate (FHR) fro m twelve weeks of when using it to detect FHR.
pregnancy . Possible cause:
a．The rechargeable battery is near depletion
IV、Equipment components: (fig. 1) of power.
1. The gap for fix ing the gallus b．Not enough coupling Gel. between the
2. Nu mber and sy mbol on LCD display window probe and abdo men
Nu mber: c．Noise occurs w hen dragging the probe on
The 5 beats average FHR v alue will display the abdo me n
on this window . d．Probe is damaged.
BF-500D+ with FHR display window
BF-500D without FHR display window
3 Bestman Instrument Bestman Instrument 16
BF-500D/500D+ BF-500D/500D+
a. Check AC power socket by qualified
electrician;
b. Make sure the connection between adapter
and the unit is correct
c . Contact the agent.
3、Malfunction: working indicator is bright while
the unit works normally; but when charging the
indicator is not bright, can not be charged and
several days later, the unit can not work any
more.
Possible cause:
a. No power available or adapter is damaged;
b. Adapter cannot work nor mally or bad
connection;
c．Circuit of the adapter is damaged or
charging indicator not av ailable;
Solution:
a．Repair the power socket by qualified
electrician;
b．Contact the agent to repair it;
c．Contact the agent to buy adapter or
battery . fig. 1 . (Front view )
15 Best man Instrument Best man Instrument 4
BF-500D/500D+ BF-500D/500D+
Sy mbol:
Ⅸ Trouble Shooting
Power indicat or or char ge indicator
1. Malfunction：While the unit is working normally,
working indicator fails to light up/ no sound.
Warning of abnor mal FHR
Possible cause:
During the range of 60-99 bpm or a. The rechargeable battery is going to use out.
161-210 bpm, the alarm indicator will b. Battery is damaged;
appear. c. The unit is damaged.
Solution:
FHR beat display a. Recharge the unit;
Volume indicator b. Contact the agent to change battery;
c. Contact the agent to repair.
5 beats average of FHR display.
2. Malfunction: Connect the adapter and turn on the
power switch, working indicator is not bright as
well as charging indicator.
Possible cause：
a． No AC power av ailable;
b．Adapter and unit are not properly connected;
c．The adapter is damaged.
Solution:
fig. 2 (LCD w indow)
5 Best man Instrument Best man Instrument 14
BF-500D/500D+ BF-500D/500D+
The unit is backed by a one -year limited
3．Charge indicator:
warranty. During the w arranty period, w hich
Indicate the current intensity of the
starts fro m the date of purchase, the
rechargeable battery . The indicator is red when
defective parts will be repaired free of
charging, and beco me green when the battery is
charge. (not including the probe and optional
full char ged.
earphone), Please note that you will be
4. Working indicator:
charged for the cost of shipping the unit
The light is bright when turned on and
fro m service office to your residence.
beco mes dark as it runs out of power.
3. yearly safe check:
5. Volume decrease button: volu me will decrease
the following safety check should be
If you press the button.
perfor med at least every 24 months by a
6. Volume increase button: volume will increase if
qualified person who has adequate
you press this button.
training, knowledge, and practical
7. Power switch:
experience to perfor m these tests.
Turn on by pressing dow n this button and press
inspect the safety relev ant labels for
again to turn off .
legibility .
8. Probe
verify the device functions properly as
9. Charger jack:
described in the instructions for use.
Co nnect the battery with the adapter.
Inspect the unit and accessories for
10. Earphone jack:
mechanical and functional damage , the
11. Probe jack:
data should be recorded in the operating
Co nnect the main frame w ith the probe
manual. If the device can not work nor mally ,
it has to be repaired.
13 Best man Instrument Best man Instrument 6
BF-500D/500D+ BF-500D/500D+
V、How to use this Doppler:
Charging time should be between 8-12 hours,
1. Take down / fix up the probe:
The correct w ay of taking out the probe fro m the except first charging between 12-16 hours.
jack is: (more than 12 hours),
Turn off the unit after use to prolong the
lifetime of the rechargeable battery.
Use only the specified AC adapters and
batteries (supplied) for the unit. Others may
pose the risk of fire, electric shock or injury.
Please use probe carefully as the probe
damaged by customers is not covered under
the free warranty.
Ⅷ Shelf-life and Warranty
fig.3(Rear view)
1．Shelf-life
Hold the unit with left hand, then take out the Precise electronic co mponents are the
probe with the right hand fro m the probe jack main parts of the Doppler; the host
(fig3). The installation of the probe is reversed. machine shelf-life is 3 years, except probe
and battery and earphone (option).
1. Warranty:
7 Best man Instrument Best man Instrument 12
BF-500D/500D+ BF-500D/500D+
will light nor mally . About 8-12 hours is needed to 2．Turn on/off
bring the unit to full charge again. Turn on the switch, the working indicator
Notice: For the first time charging should be more should be bright and t he Doppler will start to
than 12-16 hours . work; the Doppler w ill stop working w hen the
3． Preserv ation method:
indicator beco mes dark.
Prevent Doppler fro m reaching any liquid
3．Look for the best detecting position:
and do not immerse the unit and probe in
any liquid or w ater. Make sure the surface of the probe is in
Notice: If the Doppler outer shell is dirty after use, co mplete contact w ith the skin and plenty of
please use the neuter cleanser to clean it, gel. Adjust the volu me controller to your
strictly prohibit to use any other organic
desired level.
materials to clean the unit including industry
alcohol. Notice: Also you can use earphones to detect the
FHR, you will need to connect the earphone
Ⅶ Attention
well first, and then se arch for the best
● CAUTION：Before using, take the probe off position.
and then turn on the Doppler. After use, first Attention:
turn off the Doppler and then put probe back.
After use， please turn off the unit, wipe the
Otherwise, there will be noise because of
the reflection of ultrasound. coupling gel on the probe and fix the probe
● Do not use telephone or cordless telephone back to the probe jack.
within 10 meters while the unit is working
otherwise it cannot work normally.
11 Best man Instrument 8 Bestman Instrument
BF-500D/500D+ BF-500D/500D+
When the working indictor becomes dark or the FHR，first for 15 seconds and times by 4
sound is quiet, the DOPPLER needs to be （the time and the method of count depend
recharged immediately. on the doctor）
Do not drag the probe along the abdomen 6．The cleanliness and disinfection after using:
Turn off the unit after use and clean the gel
otherwise it will cause interference noise.
off the probe, put the probe back to the jack
4．Volume controller adjust method:
to protect it.
Press volume increase o nce, the volume w ill
Notice: 75% alcohol can be used to clean and
increase one level; similarly, press dow n the
disinfect the surface of the probe.
decrease button, the volume w ill decrease
one time . The volu me w ill stay at the same VI、How to maintain the unit
level until the unit is turned off.
1. Low battery power:
5. Affirm the fetal heart :
BF-500D+: When battery power is low, the
BF-500D+: once the heartbeat has been
sensitivity will decline, the working indicator,
located do not read the FHR Display
“ ” will go dark and FHR on the LCD will
imme diately .
glint or not be digitally displayed.
The FHR data w ill be displayed auto matically
BF-500D: Working indicator light w ill go dark
and w ill change as the baby’s heart rate and eventually fade out; the sensitivity
changes. will decline, the FHR will be not clearly heard.
BF-500D： After the fetal heart sound has 2. Charging method:
been heard, you can get the FHR by counting Co nnect the AC adapter to the main power
supply and follow by connecting the Doppler
unit. The charging indicator L CD
9 Best man Instrument Bestman Instrument 10
