Salter Brecknell 405 User manual

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Model 405 Weighing Scale
User Instructions
1.0 General Information
Thank you for purchasing the Model 405 scale. Please read all operating
instructions carefully before using and note the following points:
• Avoid lengthy exposure to extreme heat or cold. The scale works
best when operated at normal room temperature. Always allow the
scale to acclimate to a normal room temperature before use.
• Allow sufficient warm up time. Turn the scale on and wait a few
minutes to allow the internal components to stabilize before
calibrating or weighing.
• The cleaner the environment the better. Dust, dirt, moisture,
vibration, air currents and proximity to other electronic equipment can
cause an adverse effect on the reliability and accuracy of your scale.
Only use on a stable, vibration free surface.
• Handle with care. Gently apply all items to be weighed onto the
weighing platform. Although this scale is designed to be quite
durable, try to avoid rough treatment as this may permanently
damage the internal sensor.
• Place the item to be weighed on the platform and after the stable
weight is displayed, remove the item immediately. This will aid in the
longevity and accuracy of this weighing instrument.
• Do not operate near an in-use cell phone, radio, computer or other
electronic device as these devices emit radio frequency (RF) and
may cause unstable scale readings.
• Level the scale by looking at the bubble level under the display and
adjusting the feet on the bottom of the scale.
• The scale may be powered by an AC adapter or a 6-volt
rechargeable battery. When Lo.bAt is flashes on the display, the
battery is low. Please recharge battery immediately.

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2.0 Getting started
Charge the battery overnight with the AC adapter before using the scale or
use the AC adapter to power the unit. The AC adapter plugs into a
receptacle on the base of the scale.
The AC adapter receptacle is shown below.
3.0 Key Functions
There are two keys on the front panel; the Tare/Units key and the On/Off/
Zero key. See illustration below.
On/Off/Zero key
The On/Off/Zero key is used to turn the scale on or off and to zero the
scale.
ON/OFF Function
When scale is off, press the On/Off/Zero key to turn on the scale. The
scale will perform a start-up routine, show the working voltage x.x Udc,
display full capacity F6.000kg or F15.000kg, and the scale will try to get a
zero-point and display zero reading. The scale should have no more than
20% of full scale capacity on the weighing platform at power-up to achieve
a proper zero-point.

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Press the On/Off/Zero key for more than 5 seconds to turn the scale on or
off.
ZERO Function
When the scale is on, press the On/Off/Zero key for less than 5 seconds,
to zero the scale. Zero range is +5% of full capacity. Zero function is only
activated when there is no motion on the scale.
Pressing the On/Off/Zero key will also clear the active tare weight. When
the scale is at zero the ZERO annunciator on the left of the display, will be
lit and the NET annunciator will be off.
The scale will not zero if the display is beyond +5% of full capacity. The
display will show 0------ or 0_____, then return to the previous weight
reading.
Tare /Unit Key
Tare Function
Press the Tare/Units key for less than 5 seconds to tare the scale.
Tare range for this scale is up to 102% of full capacity. Wait to tare the
scale until it is stable. When a tare weight is active, the NET annunciator
is lit.
Unit Function
Press the Tare/Units key for more than 5 seconds to change the unit of
measure. Choose from lb, kg, g, oz, lb.oz,

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4.0 Scale Operation
Turning on the scale:
Be sure the battery is charged or that the AC adapter is plugged in.
Press the On/Off/Zero key on the front panel to turn the scale on. See
illustration above.
When the startup routine is finished, the scale is ready.
Simple weighing:
Empty the scale and press the On/Off/Zero key if the display is not at 0.
Place item(s) to be weighed on the scale. Weight is displayed.
Remove item and repeat process.
Tare/Net weighing:
Empty the scale and press the On/Off/Zero key if the display is not at 0.
Place container to be tared on the scale and press the Tare/Units key for
less than five seconds. Net annunciator lights when a tare is active.
Place item(s) to be weighed in the container. Net weight is displayed.
Remove and repeat process.
Removing a tare:
To remove an active tare weight, empty the scale, wait for the scale to
stabilize. The unit of measure annunciator will glow steady when the scale
is stable or blink while motion occurs. Press the Tare/Units or On/Off/Zero
key to remove the active tare.
Changing unit of measure:
Press and hold the Tare/Units key for five seconds to change the unit of
measure. Repeat to change to the next unit of measure.
Turning the scale off:
Press and hold the On/Off/Zero key for five seconds.

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5.0 Calibration
This scale comes with the calibration jumper on the PC board in the
CALIBRATE position. The calibration instructions below are written for this
jumper condition.
If the user wants to lock the calibration they must access the PC board and
more the jumper. See the next section 6.0 Accessing the PC board and
Locking/Unlocking Calibration on page 6 for instructions.
1. Be sure to have the proper test weights on hand. For Model 405-6
you should have 6 kg or 12 lb weights. For Model 405-15, you should
have 15 kg or 30 lb weights.
2. Remove all weight from the scale platform and be sure the scale is
turned off.
3. Press and hold the Tare/Units key, and then press the On/Off/Zero
key until…
CAL-0 appears.
4. Release the two buttons.
5. Press the On/Off/Zero key…
0in CAL-0 will flash briefly, then CAL-F is displayed.
6. Press the Tare/Units key to choose the unit of standard weight in
calibration…
The blue annunciator will light next to the active unit of mea-
sure.
7. Load full capacity on the scale platform. That is 6 kg or /12 lb for
Model 405-6, or 15 kg / 30 lb for Model 405-15. Press the On/Off/
Zero key…
Fin CAL-F will flash briefly then CAL-0 appears again.
8. Remove the weight from the scale platform, and press the On/Off/
Zero key…
0in CAL-0 flashes until calibration is complete.
9. The scale will restart in normal weighing mode. If CAL.Er is
displayed, there is an error in calibration and you need to perform
steps 1through 8again.
10. In steps 3through 5, press the On/Off/Zero key repeatedly to abort
the calibration procedure.

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6.0 Accessing the PC board and Locking/Unlocking
Calibration
To lock or unlock the calibration mode for the scale you must access the
PC board and move a jumper. Follow these steps:
1. Remove the scale platform.
2. Use a 5mm hex wrench to remove the two screws holding the
platform support to the weight sensor.
3. Turn the scale over and remove the four screws in the corner of the
base.

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4. Turn the scale over again and carefully remove the top case from
the base. Figure 1.1 shows the current main board and the
calibration jumper (SWCAL) circled. Figure 1.2 shows the older
version of the main board and the calibration jumper (JP1). The
jumper is shown inside the red oval. The oldest version of the main
board is shown in Figure 1.3.
Figure 1.1 Current main PC board with jumper circled
Figure 1.1 shows the jumper in the calibration unlocked position.
Move the jumper to the other position to lock calibration.

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Figure 1.2 Older version of the main PC board
The jumper shown in Figure 1.2 is in the ‘calibration unlocked’
position. The scale can be calibrated with the jumper on the two
pins on the right side. Pull the jumper up and move it to the left
two pins to lock calibration
There is an older style PC board your unit may have. It is shown
below.

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Figure 1.3 Oldest style main PC board
The jumper shown in Figure 1.3 is inside the small red rectangle.
It is shown in the ‘calibration locked’ position. The scale cannot
be calibrated with the jumper on the two bottom pins. Pull the
jumper up and move it to the top two pins to unlock calibration
5. Reverse the disassembly procedure to reassemble the scale.

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7.0 Setting the AUTO-OFF Function
You can set the amount of time the scale is inactive before it shuts down
to save battery power. Follow these steps:
1. Turn the scale on. Press and hold down the Tare/Units key and the
On/Off/Zero key for more than 5 seconds until…
A.oFF.x” is displayed. Xis the variable time in minutes. It can be
set from 0 to 9 minutes. If X=0, the AUTO-OFF function is
disabled.
2. To set the value of X, press the Tare/Units key to scroll through the
choices.
3. Press the On/Off/Zero key to accept the setting and restart the
scale.
8.0 Screen Messages
0¯¯¯¯¯¯: Power-on zero-point is more than 20% of full capacity above
the calibration zero-point when scale is turned on.
OR
The weight reading is more than 5% of full capacity above the
power-on zero-point when you press the On/Off/Zero key;
0______: Power-on zero-point is more than 20% of full capacity below
the calibration zero-point when scale is turned on.
OR
The weight reading is more than 5% of full capacity below the
power-on zero-point when you press the On/Off/Zero key;
_______: the current weight is less than –25% of full capacity;
¯¯¯¯¯¯¯: the current weight is over 102% of full capacity;
CAL-0: Zero point at calibration;
CAL-F: Full capacity at calibration;
CAL-Er: Calibration error;
A.ch.E r: Analog channel error;
EEP. Er: EEPROM accessing error or data in EEPROM is in error or
not in their normal range;
Lo.bAt: The voltage is below 5.7V (±0.1V)
x.x Udc: The voltage is x.xV (±0.1V)