A&D AD-4408A User manual

AD-4408A
Weighing Indicator
for Field Networks
INSTRUCTION MANUAL
1WMPD4001973

WARNING DEFINITIONS
The warnings described in this manual have the following meanings:
A potentially hazardous situation which, if not avoided, could result in
death or serious injury.
A potentially hazardous situation which, if not avoided, may result in
minor or moderate injury or damage to the instrument.
This symbol indicates caution against electrical shock. Do not touch
the part where the symbol is placed.
This symbol indicates the ground terminal.
This symbol indicates that an operation is prohibited.
NOTE Information or cautions to use the device correctly.
© 2009 A&D Company, Limited. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated into any
language in any form by any means without the written permission of A&D Company, Limited.
The contents of this manual and the specifications of the instrument covered by this manual are
subject to change for improvement without notice.
Anybus-CompactCom is a registered trademark of HMS Industrial Networks.

Page 1 AD-4408A
Contents
1. Safety Precautions .......................................................................................................3
2. Introduction...................................................................................................................4
3. Specifications ...............................................................................................................5
3.1. Analog Section....................................................................................................5
3.2. Digital Section .....................................................................................................5
3.3. General ...............................................................................................................6
3.3.1. Interface...................................................................................................................................... 6
3.3.2. Measuring functions ................................................................................................................... 6
3.3.3. Other........................................................................................................................................... 7
3.3.4. Accessories ................................................................................................................................ 7
4. Description of Each Part ...............................................................................................8
4.1. Front Panel .........................................................................................................8
4.2. Rear Panel ........................................................................................................10
5. Installation ..................................................................................................................11
5.1. Precautions .......................................................................................................11
5.1.1. Environment.............................................................................................................................. 11
5.1.2. Power source............................................................................................................................ 12
5.2. Load Cell Connection........................................................................................13
5.3. Interface Module Installation .............................................................................14
6. Operation....................................................................................................................15
6.1. General Function...............................................................................................15
6.1.1. Zero adjustment........................................................................................................................ 15
6.1.2. Zero tracking............................................................................................................................. 15
6.1.3. Tare .......................................................................................................................................... 16
6.1.4. F key ......................................................................................................................................... 16
6.1.5. display .................................................................................................................................. 17
6.1.6. Memory backup ........................................................................................................................ 17
6.2. Mode Map .........................................................................................................18
7. Calibration ..................................................................................................................19
7.1. General Description ..........................................................................................19
7.2. Calibration With an Actual Load (Cal5et).........................................................20
7.3. Calibration-Related Functions (Calf)................................................................22
7.4. Calibration Errors ..............................................................................................28
7.5. Load Cell Output Adjustment ............................................................................29
8. General Functions ......................................................................................................30
8.1. Setting Procedure .............................................................................................30

AD-4408A Page 2
8.2. Basic Functions (fncf) .....................................................................................32
8.3. Standard Serial Output (Cl f) ..........................................................................33
9. Interface......................................................................................................................34
9.1. Standard Serial Output......................................................................................34
9.1.1. Connection................................................................................................................................ 34
9.1.2. Output data............................................................................................................................... 35
9.1.3. Data transfer mode................................................................................................................... 36
10. Maintenance ...............................................................................................................37
10.1. Error Messages...............................................................................................37
10.2. Check Mode....................................................................................................37
10.2.1. Entering the check mode........................................................................................................ 37
10.2.2. Checking the key switches ..................................................................................................... 38
10.2.3. Checking the standard serial output....................................................................................... 38
10.2.4. Checking interfaces ................................................................................................................ 39
10.2.5. Checking the testing terminal ................................................................................................. 39
10.2.6. Checking the A/D (load cell)................................................................................................... 39
10.2.7. Checking the internal count .................................................................................................... 39
10.2.8. Checking the program version................................................................................................ 39
10.2.9. Checking the serial number.................................................................................................... 39
10.2.10. Checking the program checksum ......................................................................................... 39
10.2.11. Checking the FRAM checksum ............................................................................................ 40
10.2.12. Checking the calibration-related functions ........................................................................... 40
10.3. Initialization Mode ...........................................................................................41
10.3.1. RAM initialization / General functions initialization ................................................................. 41
10.3.2. All data initialization ................................................................................................................ 42
11. Setting List..................................................................................................................43
11.1. Basic Functions...............................................................................................43
11.2. Standard Serial Output....................................................................................44
11.3. Calibration-Related Functions .........................................................................45
12. External Dimensions...................................................................................................47

Page 3 AD-4408A
1. Safety Precautions
For safe and correct usage, read the following precautions carefully before using the
indicator.
Grounding
Earth ground the indicator by connecting the earth ground terminal located on the rear
panel to the earth, to prevent a fire, electrical shock or indicator malfunction.
Do not share the ground line with other electrical power equipment.
Appropriate power cable
Use a power cable appropriate to the supply voltage and current used. Using an
inappropriate cable may cause electrical leakage or a fire.
Connect the power cable to the terminals firmly using compression lugs.
Fuse replacement
A fuse is provided to protect against a short circuit and possible fire hazard.
The indicator is equipped with various protection circuits and the fuse should not burn out
under normal operations.
If the fuse burns out, the internal circuits may have been damaged by surges. Do not try to
replace the fuse. Contact the nearest A&D dealer.
Avoid water and moisture
The indicator is not water-resistant.
Securing the front panel to the control panel using the accessory panel mount packing will
provide the indicator with IP-65 protection.
Avoid an environment with flammable gases
Do not use the indicator in places where flammable gases are present.
Indicator overheat
To prevent the indicator from overheating, allow appropriate clearance between the
peripheral devices.
If the ambient temperature exceeds the specified operating temperature, use a fan to cool
the environment.

AD-4408A Page 4
2. Introduction
The AD-4408A is a weighing indicator that amplifies signals from a load cell,
converts it to digital data and displays it as a weight value.
Connection to various field networks is possible by installing the interface module
into the option slot.
•For details on applicable field networks, visit our website.
•Download the instruction manual for each interface from our website. (Memory
map and check modes vary with the interface.)
•The interface module used is the Anybus-CompactCom network interface module,
manufactured by HMS Industrial Networks.
•The interface module is available as an accessory for the AD-4408A. Purchase
the interface module from A&D, or directly from an iterface module supplier.
The accessory panel mount packing will provide the indicator with IP-65 protection.
This indicator has the following performance:
Input sensitivity: ......................... 0.15 μV /d
Display resolution: ..................... 999,999 d max.
(Less than 20,000 d recommended)
Sampling rate:............................ 100 times/second
Input voltage range: ................... -35 mV to +35 mV (-7 mV/V to +7 mV/V)
Digital span mode:
Keying in the load cell output voltage (mV/V) allows calibration to be performed
without an actual load.
NOTE: The unit, d indicates a minimum division.

Page 5 AD-4408A
3. Specifications
3.1. Analog Section
Input sensitivity 0.15 μV/d or greater
Input voltage range -35 mV to +35 mV (-7 mV/V to +7 mV/V)
Zero adjustment range -35 mV to +35 mV (-7 mV/V to +7 mV/V)
Load cell excitation voltage 5VDC 5%, 120 mA with remote sensing capability
Load cell drive capacity Maximum 8 x 350 Ωload cells
Temperature Zero 0.02 μV /°C typ., 0.1 μV /°C max.
coefficient Span 3ppm /°C typ., 15ppm /°C max.
Non-linearity 0.005 % of full scale
A/D conversion method Delta-sigma method
A/D resolution count Approximately 16,000,000 counts
Display resolution 999,999 d max.
(Less than 20,000 d recommended)
Sampling rate 100 times/second
3.2. Digital Section
Display element •Measurement display: 6-digit 7-segment green LED
•Character height: 14.6 mm
•Polarity display: 1 green LED
•Status indicators: 6 red LEDs
Measurement display •Switches between NET and GROSS
•Selectable decimal places (101, 102, 103, 104, 105)
•Overflow display
All the digits turn OFF. (When the polarity is negative, the
minus sign appears at the highest-order digit.)
Status indicators ZERO, STABLE, GROSS, NET, HOLD, 
Key switches ZERO, TARE, NET/GROSS, F, ON/OFF, ENTER, CAL

AD-4408A Page 6
3.3. General
3.3.1. Interface
Standard serial output Output for communication with A&D peripheral devices
(20 mA current loop)
Option slot
Connection to various field networks is possible by installing
the interface module into the option slot. For details on
applicable field networks, visit our website.
3.3.2. Measuring functions
Zero adjustment
•Sets the gross weight to zero by pressing the ZERO key.
•Selection of disable or enable for the operation when
unstable.
•The zero value is stored in the non-volatile memory.
•Zero adjustable range
Can be set optionally in the range of 1 to 100% of the
weighing capacity.
Zero tracking
•Tracks the weight drift around the zero point to maintain
zero.
•Zero tracking time
0.0 to 5.0 seconds (Can be set optionally within the range.)
•Zero tracking band
0.0 to 9.9 d (Can be set optionally within the range.)
Tare
•Sets the net weight to zero by pressing the TARE key.
•Selection of disable or enable for the operation when
unstable or negative.
•The tare weight is stored in the non-volatile memory.
•Tare range: Gross weight ≤Weighing capacity
Stability detection
•Turns ON the stabilization indicator when the variables of
the weight values per sampling are within the set band in
the set time.
•Stability detection time
0.0 to 9.9 seconds (Can be set optionally within the range.)
•Stability detection band
0 to 9 d (Can be set optionally within the range.)
Digital filter Cutoff frequency range (-3dB) : 0.7 to 11 Hz

Page 7 AD-4408A
3.3.3. Other
Databackup
against power failures
•Zero value, tare weight, calibration data and function data
are written into the FRAM.
•Data retention time is 10 years or more.
Power source 100 VAC to 240 VAC, +10%, -15%, (50/60 Hz)
Power consumption Approximately 10 VA
Operating temperature -10°C to +40°C
Operating humidity 85% R.H. or less (no condensation)
Installation method Panel mount
Mass Approximately 800 g
3.3.4. Accessories
Item Quantity Model name
Weighing capacity plate 1 108-4023454
Unit label 1 108-4023456
Panel mount packing 1 106-4004213
Terminal block cover 1 107-4005384

AD-4408A Page 8
4. Description of Each Part
4.1. Front Panel
Fig.1 Front panel
Displays
No. Name Description
1 Main display Displays the weight value, setting values, error messages, etc.
2 ZERO Turns ON when the weight value is in the center of zero.
3 STABLE
•Turns ON when the weight value is stable.
•The stability conditions can be changed in the calibration-related
functions.
4 GROSS Turns ON when the displayed value is a gross weight.
5 NET Turns ON when the displayed value is a net weight.
6 HOLD
•Turns ON when the weight value is being held.
•Two hold modes can be selected in the general functions, either
normal hold or peak hold.
7
The function for this indicator can be selected in the general
functions, depending on the purpose.
8 UNIT •Place a unit label.
•A unit used for weighing is set in the calibration-related functions.
1 15 14
2 3 4 5 6 7 8 10 11
13
12
9
16
ZERO STABLE GROSS NET HOLD
CAL
ZERO TARE
Net/B/G
NET GROSS
ON/OFF
ESC ENTER

Page 9 AD-4408A
Key switches
No. Name Description
9 CAL
•The key to enter the calibration mode.
•The key is concealed by a sealable cover.
To avoid unintentional operations, keep the cover attached
except when entering the calibration mode.
10
•The key to turn the indicator ON (Weighing mode) and OFF (OFF
mode).
•When OFF, all of the displays and external output/input devices
are turned OFF, but a decimal point located at the right side of
the main display remains ON.
•The key functions as an ESC key when the numerical values
are being entered.
11
•The key to proceed to the selected mode.
•Confirms the setting value and stores the data when pressed
after a setting is changed.
12
•The function for this key can be selected in the general
functions, from the list below:
No function
Manual print command
Hold
Alternate switch
Momentary switch
Clear the tare weight
Clear the zero value
•The key decreases the value of the blinking digit by one when
the numerical values are being entered.
13
•The key to switch between the gross weight and the net weight.
•The key increases the value of the blinking digit by one when
the numerical values are being entered.
14
•The key to perform tare.
•The tare conditions are set in the calibration-related functions.
•The key shifts the position of the blinking digit to the right when
the numerical values are being entered.
•In the OFF mode, pressing the ON/OFF key while holding the
TARE key will clear the zero value and the tare weight.
15
•The key to zero the current display.
•The zero conditions are set in the calibration-related functions.
•The key shifts the position of the blinking digit to the left when
the numerical values are being entered.
16 Seal •Can be sealed using a wire seal.
ON/OFF
ESC
ENTER
Net/B/G
NET GROSS
TARE
ZERO

AD-4408A Page 10
4.2. Rear Panel
Fig.2 Rear panel
1 Terminal block
Terminal No. Function
1 EXC+ Load cell excitation voltage (+)
2 SEN+ Sensing input (+)
3 SEN- Sensing input (-)
4 EXC- Load cell excitation voltage (-)
5 SIG+ Load cell input (+)
6 SIG- Load cell input (-)
7 SHLD Shield
Load cell
connection
8 C.L. Standard serial output (Current loop)
9 C.L. Standard serial output (Current loop)
10 F.G. Frame ground
11 E Earth ground
12 AC AC power source
13 AC AC power source
NOTE: Terminals 7 (SHLD) and 11 (E) are internally connected.
To avoid unintentional operations, keep the cover attached on the terminal block.
2 Blank panel
Option slot inside to install the interface module.
3 Testing terminal
Do not use, leave this terminal unconnected.
4 Sealing bolts
Can be sealed with a wire seal.
2 3
1
4
4

Page 11 AD-4408A
5. Installation
5.1. Precautions
5.1.1. Environment
The operating temperature is -10°C to +40°C .
Do not install the indicator in direct sunlight.
The indictor is not water-resistant. When used in an environment where the
indicator may be exposed to splashing water, secure the front panel to the control
panel using the accessory panel mount packing. It makes the front panel
water-resistant equivalent to IP-65.
Fig.3 Panel mounting method
Panel mount packing
Control panel
Guide rail
Washer Screw
The weighing indicator is a precision electronic instrument. Handle i
t
carefully.

AD-4408A Page 12
5.1.2. Power source
Before connecting the indicator to the power source, read the instruction manual
thoroughly.
Do not connect the indicator to the power source before the installation is complete.
To avoid electrical shock, do not handle the power cable with a wet hand.
Earth ground the indicator. Do not share the ground line with other electrical power
equipment.
The power requirement is 100 VAC to 240 VAC and the frequency is 50 Hz or 60 Hz.
Use a stable power source free from instantaneous power failure or noise.
To avoid a malfunction, do not share the power line with other devices.
The output voltage of a load cell is a very sensitive signal. Keep all electrical noise
sources away from the load cell and load cell cable.
Use shielded I/O cables. Connect the cable shield to the F.G. terminal or the
indicator housing.
Earth ground the indicator to prevent electrical shock o
r
indicator malfunction.

Page 13 AD-4408A
5.2. Load Cell Connection
Connect the load cell cable to the terminals as shown below.
Use a 6-wire shielded cable to connect a load cell, especially when the cable is long
or when summing multiple load cells, to avoid drift caused by changes in
temperature.
If the cable is short, a 4-wire shielded cable with terminals 1 and 2 (EXC+ and
SEN+) and terminals 3 and 4 (SEN- and EXC-) connected may be used, but the
error increases when summing multiple load cells and the cable is long.
Fig.4 Load cell connection
EXC-
SIG+
SIG-
EXC+
Load cell
Load cell cable
Shield

AD-4408A Page 14
5.3. Interface Module Installation
Install the interface module as follows:
Step 1 Using a Phillips screwdriver,
loosen the screws that secure
the blank panel to the
AD-4408A rear panel, and
remove the blank panel.
Step 2 Insert the interface module
into the option slot as shown
to the right.
Step 3 Insert the interface module
until it mates with the terminals
of the PC board connector
located in the option slot.
Step 4 Using a TORX®driver (size
T9), fasten the retaining
screws with a tightening
torque of 0.25 Nm in the
clockwise direction to secure
the interface module.
Fig.5 Interface module installation
NOTE: A TORX®driver is not provided with the AD-4408A.
TORX is a registered trademark of Textron Inc.
Be sure to disconnect the AD-4408A from the power source before
installing the interface module.
Step 1
Step 2
Step 3
Step 4
Blank panel
Interface module
Option slot
Retaining screw
PC board
in the option slot
Tightening torque
0.25 Nm

Page 15 AD-4408A
6. Operation
6.1. General Function
6.1.1. Zero adjustment
Zero adjustment is a function to set the gross weight to zero. It is performed by
pressing the ZERO key.
The zero adjustment range is set in Calf05 (zero adjustment range) and is
expressed in percent of the weighing capacity with the calibration zero point as the
center.
Zero adjustment is disabled, even within the zero adjustment range, when the A/D
converter overflow occurs.
A ZERO error is output if zero adjustment is not performed.
The zero value is stored in the non-volatile memory and is maintained, even if the
power is disconnected.
Clearing the zero value is performed using the F key assigned to clear the zero value.
Alternately, apply power to the indicator while holding the TARE key, or with the
indicator in the OFF mode, press and hold the TARE key and press the ON/OFF
key, to clear the zero value.
Functions related to zero adjustment
zCalf05: Changes the zero adjustment range. (0 to 100%)
zCalf10: Enables or disables zero adjustment when unstable.
zCalf16: Enables or disables power-ON zero (function to zero upon power-ON).
6.1.2. Zero tracking
Zero tracking is a function to track the weight drift around the zero point to maintain
zero.
The zero tracking time is set in Calf06 (zero tracking time) and the zero tracking
band is set in Calf07 (zero tracking band). When the weight drift is within the
specified ranges, zero adjustment is performed automatically.
A ZERO error is not output even if zero tracking is not performed.
Functions related to zero tracking
zCalf06: Changes the zero tracking time. (0.0 to 5.0 seconds)
zCalf07: Changes the zero tracking band. (0.0 to 9.9 d)

AD-4408A Page 16
6.1.3. Tare
Tare is a function to store the gross weight as the tare value and set the net weight to zero.
The tare weight is stored in the non-volatile memory and is maintained, even if the
power is disconnected.
Clearing the tare weight is performed using the F key assigned to clear the tare weight.
Alternately, apply power to the indicator while holding the TARE key, or with the
indicator in the OFF mode, press and hold the TARE key and press the ON/OFF
key, to clear the tare weight.
Functions related to tare
zCalf10: Enables or disables tare when unstable.
zCalf11: Enables or disables tare when the gross weight is negative.
6.1.4. F key
Assign a function to the F key in the general functions.
Functions related to the F key
zfncf02: Assigns a function to the F key from the functions below:
0: None
1: Manual print command
2: Hold
3: Alternate switch (Read the description below.)
4: Momentary switch (Read the description below.)
5: Clear the tare weight
6: Clear the zero value
zCalf15: Enables or disables clearing the zero value.
zCalf20: Enables or disables the print command when the gross weight is negative.
Alternate switch and momentary switch
zBy assigning these switches to the F key, the ON/OFF status of the F key can be
transmitted to the master station. This is useful when building a network or
performing maintenance.
zBy selecting “3: F key status” for fncf04 (display), the ON/OFF status of the F
key can be confirmed by the memory in sync with the display.
zThese switches perform as below:
Alternate switch
Press the switch once and release the switch to turn ON or OFF.
Press the switch again to turn OFF or ON.
Momentary switch
Only when the switch is being pressed, the F key is ON. When released, OFF.

Page 17 AD-4408A
6.1.5. display
Assign a function to the display in the general functions.
Functions related to the display
zfncf04: Assigns a function to the display from the functions below:
0: None
1: Zero tracking in progress
2: Alarm (Zero range setting error, over)
3: F key status (Read the description below.)
F key status
zEnables when alternate switch or momentary switch is selected for fncf02 (F key).
The display turns ON when the F key is ON and turns OFF when the F key is OFF.
6.1.6. Memory backup
Zero value, tare weight, calibration data and function data are written into the FRAM.
FRAM is a non-volatile memory and does not require batteries.
Data retention time is 10 years.

AD-4408A Page 18
6.2. Mode Map
The indicator has several modes to perform various operations.
Perform mode switching by key operation as shown below, only in the direction of the
solid arrow.
After setting a mode, the indicator resets automatically. Alternately, the indicator resets,
when the power is disconnected.
NOTE : When the power is
disconnected while in
the OFF mode, the
indicator will start in
the OFF mode when
power is re-connected.
Fig.6 Mode map
Power ON
OFF
mode
Weighing
mode General
function mode
Maintenance
mode
Calibration
mode
Check
mode
Initialization
mode
Calibration using
an actual load
Calibration-related
function mode
All data
initialization mode
See the note
below.
Switch using
the ON/OFF key
Enter using the key combination
ENTER + F
Enter using the key combinations
ENTER + F
and then
ZERO + ENTER
Enter using the CAL key
Automatic reset after setting