JDC ELECTRONIC SA FLOWATCH User Manual

You have just acquired a piece of high precision equi-
pment which has been created using the most modern
technology. It has been designed to stand up to inten-
sive use. However, in order to maintain its appearance
and its precision, we recommend that you treat it with
care and read this manual carefully.
To work properly, the
at least:
› 1 display unit
› 1 probe
› 1 impeller
Function of the buttons
ON : press for 1 second
OFF : press for 2 seconds (not auto off)
LIGHT : press on and off briefly
UP : setting mode
START / STOP : chronometer mode
DOWN : setting mode
LAP / RESET : chronometer mode
SET / CAL : setting mode
RESET MEMORY : press for 3 seconds
+
Configuration
To access the configuration mode of your instrument,
just press on the button. Pressing the
again cause the system to confirm the setting if there
has been a change. If not then it goes to the next set-
ting. To modify the settings the
to be used. Here is how to proceed with the different
instrument settings.
Speed measuring unit
The units to be selected are : knots, mph, km/h, m/s, fps
and cm/s. Once the unit is chosen, it remains displayed
in the top right. If no other unit is chosen the instrument
is set to the cm/s.
Temperature measurement unit
The units to be selected are : °F, °C, °F
Setting the time of the average
The times to be selected are : --- (weighting), 3'', 6'', 12'',
30'', 1', 6', 30', 1:00', 6:00', 12:00', 24:00' or timer .
The timer mode allows measurement of the average
between start (press ) and stop (press
is displayed on the lower lines. This timer allows the
use of the LapTime function (press
flashes). The button also allows the timer to be re-
set to zero. This works in the same way as a standard
chronometer.
Setting of the speed and temperature displays
The displays to be selected are : ---, MIN, AV, MAX.
If AV is selected, the average of temperature and wind
are shown. The display of average values is always
made simultaneously for the speed (at the centre) and
temperature (at the bottom). The other modes (---, MIN,
MAX) only concern the temperature.
Setting of the display is not possible if the units selected
are °F or °C .
EN
system has to include
button once
and buttons have
and °C .
), this time
, the symbol
Measuring air or liquid flows
Instantaneous speed (at the top)
Maximum speed (at the centre)
The display of the maximum speed is made at the
central part. It is the maximum measured value of the
time of the average. The value is reset to zero during a
RESET of the memory.
Average speed (at the center if AV is selected)
Measuring the temperature
The temperature sensor is on the end of each probe.
Instantaneous temperature
Important : Thermal inertia of the instrument directly
affects the stabilization time of the measurement. The
greater the temperature difference, is the longer this
time will be. This time will be shorter if the wind speed
is higher.
Wind-chill temperature
As you know, exposure to low temperatures is
potentially dangerous to the human body. But
did you know that wind plays a significant part
in how your body actually feels temperatures?
For example, an ambient temperature of 0°C
and a 30 km/h wind have the same effect on
you as a temperature of -13°C! The result
of the calculation of the effect of wind on the
temperature is called the "wind-chill temperature".
The shows immediately the wind-chill.
Minimum temperature
Maximum temperature
These two modes show the min or max
values measured over time of the average.
The value is reset to zero during a RESET of
the memory. These values are not those of
the temperature felt by the body.
Probe specifications
Available in 2 different lengths, these 2 probes are es-
sential to install any impeller.
› Aluminium telescopic rod, total length of 1.2m with 2
meters cable to measure in hard-to-reach ventilation
shafts, air conditioning conduits, rivers flows and
irrigation canals.
› Aluminium small rod, 10 cm long to use your
as a compact windmeter (mostly used
with windspeed impellers ø 20mm and ø 12mm)
› Probe with a 15 meters sounding cable with water-
flow impeller, to measure water flow from bridges.
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