Seca 376 NEC2, 374 NEC2 Service Manual
Service Manual
Variants:
3741321004
3741321364
3767021008
3767021098
3767021154
3767021228
3767021288
for seca 374/376
Description:
Babyscale with NEC II electronic and radio module
Content:
Service instruction electronic 30-34-00-812 a
Cableplan 08-02-06-050 d
Replacement 30-34-00-813
Service Manual Number
17-05-01-356-a
Valid as of: 01.08.2011
Spare parts 374-13-21-004
Spare parts 374-13-21-364
Spare parts 376-70-21-008
Spare parts 376-70-21-098
Spare parts 376-70-21-154
Spare parts drawing 30-34-00-814
Manual number: 17-05-01-356-a
General information seca
Electronics (NEC2) Service
Instructions
MODEL
[374|376|378|703|704|264|274|284|285|954|957|959|963]
17.08.11/RLEU/ARI/MRE 1/36 30-34-00-812a
General information seca
Contents
1 General Information [374|376|378|703|704|264|274|284|285|954|957|959|963]..................... 4
1.1 Type Plates [374|376|378|703|704|264|274|284|285|954|957|959|963].....................4
1.2 Design and Function of the Scale Part
[374|376|378|703|704|264|274|284|285|954|957|959|963] ...................................................... 5
1.2.1 Design [374|376|378|703|704|284|285].............................................................. 5
1.2.2 Function [374|376|378|703|704|284|285]............................................................ 5
1.3 Design and Function of the Head Slider [264|274|284|285]........................................6
2 Maintenance [374|376|378|703|704|264|274|284|285|954|957|959|963]................................ 7
2.1 Adjustment of Scales [374|376|378|703|704|284|285|954|957|959|963].................... 7
2.1.1 General [374|376|378|703|704|284|285|954|957|959|963]................................. 7
2.1.2 Calibration Counter / Number of Adjustments
[374|376|378|703|704|284|285|954|957|959|963]................................................................8
2.1.3 Adjustment Mode and Displaying the Calibration Counter Contents
[374|376|378|703|704|954|957|959|963]..............................................................................8
2.1.4 Adjustment Mode and Displaying the Calibration Counter Contents [284|285]..8
2.1.5 Placing Adjustment Weights on the Scale
[374|376|378|703|704|284|285|954|957|959|963]................................................................8
2.1.6 Example: Adjusting a Scale with 100 g Graduations [703|704|284|285]............9
2.1.7 Example: Adjusting a Baby Scale with 10 g Graduations [374|376]...................9
2.1.8 Overview of Adjusting a Scale with 100 g Graduations [703|704]....................10
2.1.9 Overview of Adjusting a Baby Scale with 10 g Graduations [374|376|378]......12
2.2 Adjusting the Head Slider [284|285] .......................................................................... 13
2.3 Displaying the Gravity Factor [374|376|378|703|704|284|285|954|957|959|963]......13
2.4 Setting the Gravity Factor [374|703|284|954]:........................................................... 14
2.4.1 Example for Gravity Factor Setting [374|703|284|954].....................................15
2.4.2 Summary of a Typical Gravity Factor Setting Sequence [374|703]..................15
3 Errors [374|376|378|703|704|284|285|954|957|959|963]....................................................... 17
3.1 Error Symptoms for Scale [374|376|378|703|704|284|285]....................................... 17
3.2 Error Symptoms for Head Slider [374|376|378|703|704|284|285|954|957|959|963].18
3.3 Radio Error Symptoms [374|376|378|703|704|284|285]............................................ 18
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General information seca
3.4 Scale Error Messages [374|376|378|703|704|284|285|954|957|959|963]................. 20
3.5 Head Slider Error Messages [264|274|284|285]........................................................ 21
3.6 Radio Error Message [374|376|378|703|704|284|285|954|957|959|963].................. 22
4 Measurements [374|376|378|703|704|264|274|284|285|954|957|959|963]........................... 23
4.1 Supply Voltage [374|376|378|703|704|264|274|284|285|954|957|959|963].............. 23
4.2 Load Cell [374|376|378|703|704|284|285|954|957|959|963]..................................... 23
4.2.1 Measurement Using a Multimeter
[374|376|378|703|704|284|285|954|957|959|963].............................................................. 23
5 Software intended Purpose....................................................................................................26
5.1 Installation and Start.................................................................................................. 26
5.2 Updating the Radio Module Software........................................................................ 27
5.3 Set-up Process...........................................................................................................28
5.4 Updating the Radio Module Software........................................................................ 29
5.5 Technical Requirements for Updating .......................................................................30
5.6 Updating the Wireless Printer Software.....................................................................30
5.7 Updating Old Printers................................................................................................. 31
5.8 Problems with Updating............................................................................................. 31
Appendixes.................................................................................................................................. 32
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General information seca
1 General Information
[
374|376|378|703|704|264|274|284|285|954|957|959|963]
These service instructions are intended for specialist staff responsible for
maintenance and repair of the devices. These persons must be familiar with all
the relevant electro-technical regulations and must adhere to them any time.
These instructions are not suitable for users without specialist knowledge.
These instructions describe how to service the devices
[374|376|378|703|704|264|274|284|285] equipped with NEC2 electronic
modules. The device types for which these instructions apply are listed in the
section headings. There are some identical models with NEC1 electronic
modules. These instructions are not valid for those types.
What is the structure of this document and how should you read it? Section 1
provides a short overview of the most important points for service. We
recommend you should read it completely. Section 2 deals with the
maintenance of the devices, i.e. work that may have to be carried out more
frequently. This section can be read as and when required. Troubleshooting is
covered in section 4, where you find detailed descriptions of various
measurements intended to identify specific errors. Starting point for
troubleshooting is section 3, which includes an overview of error descriptions
and the inspection steps required to identify them.
1.1 Type Plates
[374|376|378|703|704|264|274|284|285|954|957|959|963]
To enable you to identify the device, information about the model and serial
number is found on the underside or on the frame of the device (see Figure 1:
Type plate (left: approved [376|378|704|385]; right: non-approved) [376|703|284])
Note down this information so that you have it on hand in case you need to
contact us for queries or spare parts orders.
Figure 1: Type plate (left: approved [376|378|704|385]; right: non-approved) [376|703|284])
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General information seca
1.2 Design and Function of the Scale Part
[374|376|378|703|704|264|274|284|285|954|957|959|963]
1.2.1 Design [374|376|378|703|704|284|285]
The scale consists of the following main parts: the frame with up to four load
cells, a display unit, a key panel and a power supply unit.
1.2.2 Function [374|376|378|703|704|284|285]
The action of a force causes elastic deformation of the load cell. A
corresponding analog signal is supplied, which changes linearly with the force
applied. This signal is measured and evaluated by the scale electronics and
displayed as a weight value. Figure 2: Functional diagram [704|284|285]
shows the functional diagram for scales with separated modules for
determining and displaying the weight. Figure 3: Functional diagram
[374|376|378|703]
shows the functional diagram for scales with a single electronic module for
weight measurement and display.
Radio module
NEC2 Display module
08-06-18-172
08-06-18-170 oder -195
NEC2 DMS Module (Weight measurement)
ISIS BUS (Modular cable)
08-06-18-156
Keyboard
DC Supply
cell
Load
Load
cell
Load
cell
Load
cell
Figure 2: Functional diagram [704|284|285]
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General information seca
NEC2 Compact module
(Weight measurement and display)
08-06-18-167 oder -163
Figure 3: Functional diagram [374|376|378|703]
Load
cell
Load
cell
Load
cell
Radio modulel
08-06-18-172
Keyboard
DC Supply
Load
cell
1.3 Design and Function of the Head Slider [264|274|284|285]
The head slider uses the measuring method of visual reading off from the insert
scale. Absolute and relative graduation marks are scanned to determine
lengths. Once the slider has moved more than two absolute marks, the absolute
position can be determined and a length is output.
Figure 3: Absolute (left) and relative graduation marks (right) [264|274|284|285]
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Maintenance seca
2 Maintenance
[374|376|378|703|704|264|274|284|285|954|957|959|963]
The following section provides an overview of all maintenance jobs which can
be carried out.
2.1 Adjustment of Scales
[374|376|378|703|704|284|285|954|957|959|963]
2.1.1 General [374|376|378|703|704|284|285|954|957|959|963]
To compensate for linear measuring deviations, which occur e.g. as a result of
gravity variations in different gravity zones, the scale offers an adjustment
feature. This adjustment must also be carried out whenever the load cell is
replaced.
seca scales with modular NEC-G2 electronics are fitted with a softwarecontrolled adjustment device that is controlled using the existing operating
elements. When developing the adjustment device, special attention was paid
to the following requirements:
It must be possible to readjust scales without any additional external
equipment/tools.
The readjustment device must be admissible for verification.
It must be possible to readjust the scales without calibrated test weights.
The readjustment device must be protected against inadvertent use.
Scale adjustment can be carried out manually as described in section 0 „Scales
fitted with the new, modular electronics are equipped with a calibration counter
allowing a software adjustment to be carried out in accordance with the
requirements for verified scales. Each completed adjustment procedure is
registered by the calibration counter, i.e. the number is automatically
incremented by 1. Non-approved scales are also fitted with a counter which
counts the number of adjustments.
” or using seca serva 2.0. Manual adjustment will not correct any corner errors.
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Maintenance seca
2.1.2 Calibration Counter / Number of Adjustments
[374|376|378|703|704|284|285|954|957|959|963]
Scales fitted with the new, modular electronics are equipped with a calibration
counter allowing a software adjustment to be carried out in accordance with the
requirements for verified scales. Each completed adjustment procedure is
registered by the calibration counter, i.e. the number is automatically
incremented by 1. Non-approved scales are also fitted with a counter which
counts the number of adjustments.
2.1.3 Adjustment Mode and Displaying the Calibration Counter
Contents [374|376|378|703|704|954|957|959|963]
To begin readjustment or to display the calibration counter contents, start the
scale while pressing another key at the same time. The contents of the
calibration counter (i.e. the number of adjustment procedures carried out so far)
are then displayed for 18 seconds (flashing).
While the calibration count is displayed, a key must be kept pressed (for more
than 1.5 seconds) to switch the scale to adjustment mode.
2.1.4 Adjustment Mode and Displaying the Calibration Counter
Contents [284|285]
To begin readjustment or to display the calibration counter contents, start the
scale and press another key while the display shows seca. The contents of the
calibration counter (i.e. the number of adjustment procedures carried out so far)
are then displayed for 18 seconds (flashing).
While the calibration count is displayed, a key must be kept pressed (for more
than 1.5 seconds) to switch the scale to adjustment mode.
2.1.5 Placing Adjustment Weights on the Scale
[374|376|378|703|704|284|285|954|957|959|963]
Once you have switched to adjustment mode as described in section 0 or 2.1.4,
the display shows the text “CAL”. By pressing any key except for the start key
for more than 1.5 seconds, the actual readjustment mode is activated. The
display reads "dec". The weight value currently measured then appears. The
scale is in decrementing state. To switch over from decrementing to
incrementing mode and vice versa press a key for more than 1.5 seconds with a
test weight placed on the scale. The display will read “dec” or “inc” accordingly.
The test weight is at least 25% of the max. load of the scale (we recommend
approx. 66-75%).
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Maintenance seca
Adjustment can now be completed by pressing a key until the display shows
“Sto”. The scale computes and stores a new linearity coefficient and switches
off automatically. Your scale is now adjusted. Remove the test weight.
Note:
Timeout control is not active for the phase of placing and confirming the test weight.
To minimize adjustment errors, readjustment can only be carried out using a test
weight above 25 % and below 100 % of the max. load. Otherwise the error “Er:x:15”
will be displayed.
2.1.6 Example: Adjusting a Scale with 100 g Graduations
[703|704|284|285]
The selected test weight is 200 kg.
The current weight shown on the display is 199.7 kg (max. deviation of 300 g).
In this example, you must switch the scale to incrementing mode to carry out
readjustment. When the tare/hold key has been pressed (for more than 1.5
seconds), "inc" starts flashing.
Now increase the value by the first 10 g (by briefly pressing the tare/hold key).
After this has been repeated x times, the value 200.0 (rounded!) appears on the
display although the internal measured value still is 199.95 kg (not rounded!).
To correct this rounding error, increment the value five times by 10 g to obtain
exactly 200.00 as the calculated value.
Complete the readjustment procedure as described in section 2.1.5.
2.1.7 Example: Adjusting a Baby Scale with 10 g Graduations
[374|376]
The selected test weight is 15 kg. The current weight shown on the display is
14.970 kg (max. deviation of 30 g).
In this example, you must switch the scale to incrementing mode to carry out
readjustment. When the tare/hold key has been pressed (for more than 1.5
seconds), "inc" starts flashing.
Now increase the value by the first 1 g (by briefly pressing the tare/hold key).
Each alteration is shown on the display.
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Maintenance seca
Complete the readjustment procedure as described in section 2.1.5.
2.1.8 Overview of Adjusting a Scale with 100 g
Graduations [703|704
]
Action carried out by the user
The scale is switched off. No values or characters on the display.
Press the tare/hold key and keep it
pressed while simultaneously pressing
the start key.
Release both keys. The contents of the calibration counter
Press the tare/hold key for more than
1.5 seconds within the next 18 seconds.
18 seconds have passed and no key has
been pressed.
Result
The contents of the calibration counter
flash on the display for 18 seconds.
flash on the display for 18 seconds.
The system switches to adjustment
selection mode and “CAL” flashes on the
display.
The scale switches off.
Press the tare/hold key for more than 1.5
seconds.
Place the test weight on the scale. The measured weight of the test weight
Decide whether to decrement or to
increment:
Incrementing:
Press the tare/hold key for more than 1.5
seconds.
Decrementing
scale already is in dec mode.
Decrementing or incrementing:
Again briefly press the tare/hold key (for
: No action required as the
"dec" appears on the display (flashing)
and then the current weight (0.0 - also
flashing).
appears on the display (flashing).
Incrementing mode is activated; "inc"
appears on the display.
No output on the display.
The measured weight is decremented or
incremented by 10 g. Please remember
that pressing the key does not always
17.08.11/RLEU/ARI/MRE 10/36 30-34-00-812a
Maintenance seca
less than 1.5 seconds). change the value on the display due to
the low display resolution. Only the
rounded value is output.
Repeat this step until the measured
weight matches the test weight (format:
xxx.0 kg).
To correct this rounding error, decrement
or increment the value five times by 10 g.
Press the tare/hold key until the display
shows “Sto”.
The display indicates the test weight
(format: xxx.0 kg).
The display indicates the exact test
weight (format: xxx.0 kg).
The display reads “Sto” and the scale
switches off automatically.
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Maintenance seca
2.1.9 Overview of Adjusting a Baby Scale with 10 g Graduations
[374|376|378]
Action carried out by the user
The scale is switched off. No values or characters on the display.
Press the tare/hold key and keep it
pressed while simultaneously pressing
the start key.
Release both keys. The contents of the calibration counter
Press the tare/hold key for more than 1.5
seconds.
18 seconds have passed and no key has
been pressed.
Result
The contents of the calibration counter
flash on the display for 18 seconds.
flash on the display for 18 seconds.
The system switches to adjustment
selection mode and “CAL” flashes on the
display.
The scale switches off.
Press the tare/hold key for more than 1.5
seconds.
Place the test weight on the scale. The measured weight of the test weight
Decide whether to decrement or to
increment:
Incrementing:
Press the tare/hold key for more than 1.5
seconds.
Decrementing: No action required as the
scale already is in dec mode.
Decrementing or incrementing: The measured weight is decremented or
"dec" appears on the display (flashing)
and then the current weight (0.000 - also
flashing).
appears on the display (flashing).
Incrementing mode is activated; "inc"
appears on the display.
No output on the display.
17.08.11/RLEU/ARI/MRE 12/36 30-34-00-812a
Maintenance seca
A
gain briefly press the tare/hold key (for
less than 1.5 seconds).
Repeat this step until the measured
weight matches the test weight (format:
xx.000 kg).
Press the tare/hold key until the display
shows “Sto”.
incremented by 1 g.
The display indicates the test weight
(format: xx.000 kg).
The display reads “Sto” and the scale
switches off automatically.
2.2 Adjusting the Head Slider [284|285]
The head slider electronics must be readjusted whenever the electronics are
replaced. Please refer to the instructions in the operating manual.
2.3 Displaying the Gravity Factor
[374|376|378|703|704|284|285|954|957|959|963]
To view the gravity factor, the scale must first be switched to adjustment mode
(see section 0 or 2.1.4).
As soon as the text “CAL” is displayed, press a key briefly (less than 1.5
seconds).
The display shows “GAL”.
Pressing a key for more than 1.5 seconds displays the gravity factor set. The
gravity factor is shown in mm/s².
The scale switches off again automatically after 18 seconds.
Note [376|378|704|285]:
On verified scales, the gravity factor can only be displayed as long as the calibration
count is 1.
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Maintenance seca
2.4 Setting the Gravity Factor [374|703|284|954]:
The gravity factor can only be set on non-approved models [374|703|284].
Before the gravity factor can be set, the scale must first be switched to
adjustment mode (see section 0 or 2.1.4).
While the calibration count is displayed, a key must be kept pressed (for more
than 1.5 seconds) to switch the scale to adjustment mode.
As soon as the text “CAL” is displayed, press a key briefly (less than 1.5
seconds). The display shows “GAL”.
Then press a key (for more than 1.5 seconds) to switch the scale to the mode
for gravity factor setting. The display shows “dec” and then the gravity factor
currently set. The gravity factor is shown in mm/s².
The scale is in decrementing state.
If the gravity factor displayed matches the target value, no further setting is
required and the menu item can be closed.
If the gravity factor shown on the display needs to be adjusted, it must be
altered by pressing a key until it matches the gravity factor required. Estimate
whether the required gravity factor is easier to reach by decrementing or by
incrementing. To toggle between decrementing mode and incrementing mode,
press a key (for more than 1.5 seconds.) (Display shows dec or inc.)
Press the key for less than 1.5 seconds to increase or decrease the gravity
factor displayed by 5 mm/s². Repeat the procedure until the gravity factor
displayed and the target gravity factor match.
Gravity factor setting can now be completed by pressing a key until the display
shows “Sto”. The scale stores the new gravity factor and switches off
automatically.
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