RCBS Range Master 750 - Manual (Page 3)

GENERAL INFORMATION
Handloaders know quality reloads begin with
RCBS products and one of the most important
pieces of equipment is the RCBS
RangeMaster 750 Digital Scale. With features
like a 750-grain capacity, clear and easy to
read display that reads in grains or grams,
quick repeatability and an easy re-zero feature,
the RCBS RangeMaster is the perfect choice
for serious shooters that demand the best.
If the scale has been sitting at a cool
temperature, remove it from the carton and
allow it to sit at room temperature for about 20
to 30 minutes before using.
Carefully unpack the scale. Look for and
identify the following items:
 Scale with platen
 AC Power adaptor
 One 20 gram weight and one 30
gram weight
 Powder pan
 Under the scale is the cover for the
battery (not supplied)
 Instruction Manual
 Warranty Card
The scale was shipped in protective
packaging which should be saved and used
for transporting the scale. This packaging is
also recommended for long term storage of
the unit.
POWER SUPPLY (ADAPTOR):
(1) Input: 120 VAC 60 Hz
Output : 9V DC 100 mA
(2) Input : 230 VAC 50 Hz
Output : 9V DC 100 mA
POWER SUPPLY (ADAPTOR):
9V DC batteries
POWER CONSUMPTION:
Average current consumption in use: DC 15
mA
Average current consumption in standby: DC
10μA
Notice: When the low-power indication
appears on the screen, the batteries
need to be replaced.
SPECIFICATION:
750.0 GN / 0.1 GN
50.00 g / 0.01 g
IMPORTANT:
Treat the scale as you would any fine
instrument. The RangeMaster 750 is
physically very fragile and the load cell can be
damaged by the following:
 Pushing down or dropping the scale.
 Pulling up on the platen in such a
way that it binds in the load cell.
 A sudden, violent physical shock to
the scale.
SCALE - KEYPAD
FUNCTION DESCRIPTION
GN/GMS ZERO CAL ON/OFF
GN/GMS: This is the key to change the
scale from grains to grams. The
scale defaults to grains GN.
When in the grams mode it will
show 0.00 and a lower case g will
be in the upper right hand corner.
When the scale is in grains mode,
it will show 0.0 and there will be
an upper case GN along side of
the 0.0
ZERO: This is the key that will re-zero your
scale and remove the weight of the
pan from the platen. To tare the
weight of the pan from the scale,
place the pan on the platen and
press Zero. This will remove the
weight of the pan. When you
remove the pan it will show a
negative number. When the pan is
placed back on the scale it will show
0.0 GN and you are ready to weigh.
CAL: This is your calibration key. You
should calibrate your scale each time
you begin a new reloading session.
See the calibration section to calibrate
your scale.
ON/OFF: Power on / Power off
SET UP
Your Scale is powered by a 9 Volt DC
transformer or you can use a 9 volt battery
(not supplied with the scale). Choose a
quality 9 volt battery or use the transformer
supplied with the scale.
CALIBRATION
Always calibrate your scale before use. This
must be done WITHOUT the powder pan on
the platform. To calibrate the scale, follow the
steps below:
Step 1. Be sure the powder pan has been
removed from the platen and then
press the ON key. When you turn
the scale on, the display will show
88888 across the display for a few
seconds and then displays 0.0 GN
(grains mode). The arrow will be
poi
nt i ng t o “ st abl e” when r eady t o
proceed with calibrating. SEE
PICTURE #1
Step 2. Next press the CAL key on the
scale. The display will read C 0
with a lower case g n the upper right
hand corner of the display. When
the display shows C 0 press the
CAL key again. SEE PICTURE #2
Step 3. When the display shows C 20 place
the 20 gram weight on the platen
(the smaller of the two) and press
the CAL key. SEE PICTURE #3
Step 4. When the display shows C 50, add
the 30 gram weight to the platen
and press the CAL key. SEE
PICTURE #4
Step 5. Now the display will show 50.00 g.
SEE PICTURE #5. Remove both
weights from the platen and replace
them to their holders. The display
will automatically switch to 0.0 GN
(grains)
Step 6. Next place the powder pan on the
platen and press the ZERO key to
zero the weight of the pan. The
display will now show 0.0 GN and is
now calibrated and ready to operate.
AUTO POWER OFF FUNCTION:
1.This function is only works when the battery
power is used. With no weight on powder
pan and without pressing any key for 5
minutes, the scale will automatically shut
down.
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