Mobatime SEW 30 User manual

INSTRUCTION MANUAL
SEW 30 / SAW 30
WiFi Clock
©MOSER-BAER AG — SWITZERLAND BE-801379.00 | 2023

SEW 30 / SAW 30 | INSTRUCTION MANUAL
Regulations and Certification
This product was developed and produced in accordance with the following EU directives:
EMC Electromagnetic compatibility directive 2014/30/EU
LVD Low voltage directive 2014/35/EU
RED Radio equipment directive 2014/53/EU
RoHS Restriction of the use of certain hazardous substances directive 2011/65/EU
REACH Chemical substances directive 1907/2006/EC
WEEE Waste electrical and electronic equipment directive 2012/19/EU
Railway Interop. Interoperability of the rail system within the European Union directive 2016/797/EU
Railway Safety Railway safety directive 2016/798/EU
See Conformity for the declaration of conformity of this specific product. This product may offer a CB test certificate for
download at MOBATIME.COM/support/resources.
Important Notes
This document was generated January 20, 2023 with the following disclaims:
1. Please read and follow the safety information in this document before operating the product. We cannot guarantee
that no accidents or damage will occur due to improper use of this product. Please use this product with care and
operate at your own risk.
2. We are not liable for any direct or indirect damage caused by the use of this document or the said product.
3. This product must be connected and installed by a qualified electrician who is familiar with the relevant regulations
(e.g. VDE).
4. The information in this document is subject to change without notice. The latest version of this document is
available for download at MOBATIME.COM/support/resources.
5. The product software is continuously being optimized and supplemented with new options. The latest firmware is
available for download at MOBATIME.COM/support/resources.
6. This Instruction Manual has been composed with the utmost care to explain all the details to ensure a safe and
stable operation of this product. Nevertheless, if questions arise or any errors appear, feel free to contact support.
7. MOBATIME Two Years Limited Product Warranty. MOSER-BAER AG and BÜRK MOBATIME GmbH warrant
MOBATIME branded hardware product contained in the original packaging against defects in materials and
workmanship when used normally in accordance with MOBATIME’s guidelines for a period of TWO YEARS from the
date of original retail purchase by the end-user purchaser.
8. No part of this document or the said product may be reproduced in any form or by any means or used to make any
derivative such as translation, transformation, or adaptation without permission from BÜRK MOBATIME GmbH,
D-78026 VS-Schwenningen or MOSER-BAER AG - CH 3454 Sumiswald.
9. Copyright ©2023 MOSER-BAER AG - CH 3454 Sumiswald / SWITZERLAND. All rights reserved.
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Contents
1 Safety 4
1.1 Instructions and Symbols ................................... 4
1.2 General ............................................. 5
1.3 Installation ........................................... 5
1.4 Operation ............................................ 6
1.5 Maintenance and Cleaning .................................. 6
1.6 Disposing ............................................ 7
2 Introduction 8
3 Quick Start Guide 9
4 Operation 11
4.1 Modes of Operation ...................................... 11
4.2 Device Status .......................................... 12
5 Web Interface 13
5.1 State .............................................. 13
5.1.1 12h Mode ........................................ 13
5.1.2 Manual Time ...................................... 13
5.2 Configuration .......................................... 14
5.2.1 General ......................................... 14
5.2.2 Network Connection ................................. 14
5.2.3 Network Time Protocol ................................ 15
5.2.4 Monitoring ....................................... 15
5.2.5 Static IP Address ................................... 15
5.2.6 Config Management .................................. 16
6 Status Message 17
7 Tips and Troubleshooting 18
7.1 Recommended Setup ..................................... 18
7.2 Further Behaviors ....................................... 19
7.3 Troubleshooting ........................................ 20
8 Technical Data 21
8.1 Overview ............................................ 21
8.2 Battery Operation ....................................... 21
8.3 Supported Timezones ..................................... 22
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1 Safety
Read the safety sections carefully and follow all the instructions. This ensures
safe and reliable operation of this device.
1.1 Instructions and Symbols
Symbols used throughout this document and their meaning are as follows:
i
A note or important information.
?
Answer to a possible question. Contact information.
Keep away from children and people with limited physical, sensory, or mental
capacities
Action needs to be taken.
Connect device to earth ground.
More information included in the manual.
Disconnect mains power before doing anything.
Attention of electrical shocks.
Surface may be hot.
Item is flammable.
A warning, be cautious.
Recyclable materials.
Do not put in trash.
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1.2 General
i
For safety and licensing reasons, unauthorized modifications and/or changes
to the product is prohibited. Maintenance, adjustments or repairs may only be
carried out by the factory (copyright holder).
The product is not a toy; it does not belong in the hands of children. Mount or
place the product so that it cannot be reached by children. Children may try
to insert objects into the product. The product will not only be damaged, but
there is also a risk of injury, as well as danger to life through electric shock.
Never open the housing of this product, for it poses mortal danger from electric
shock or may even cause a fire.
•Keep packaging such as plastic films away from children. There is the risk of suffocation if
misused.
Use caution with the product, knocks, blows, or even falls from a low height
can damage it.
In industrial facilities, the accident prevention regulations of the trade associa-
tions for electrical systems and equipment must be observed.
•Do not use the product if it is damaged. It can be assumed that safe operation is no longer
possible if:
–the product has visible damage
–
the product is not working properly (thick smoke or a burning smell, audible crackling noise,
discoloration of the product or surrounding areas)
–the product was stored under adverse conditions
–tough conditions during transport
Improper handling of this product operated on the mains voltage can cause
mortal danger from electric shock!
i
Interconnecting or combining equipment bearing a CE label does not inevitably
result in a system that conforms with the safety regulations. Integrators will
have to reassess the new product‘s compliance according to the locally valid
directives. See section Conformity for more information on certification of this
product.
1.3 Installation
•This product must be connected and installed by a qualified electrician who is familiar with the
relevant regulations (e.g. VDE).
Never plug the product into voltage/power supply immediately after it has been
moved from cold into warm environment (e.g. during/after transport/unboxing).
The resultant condensed water may damage the product or may cause electric
shock.
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Allow the product to reach the ambient temperature. Wait until the condensa-
tion has evaporated, this can take a few hours. Only then can the product be
connected to the voltage/current supply and put into operation.
This product may have screw terminal with open electrical contacts. It is
essential to ensure that the connection is made only when no voltage/current
is applied. Secure the power supply to prevent accidental reconnection. Verify
the absence of voltage using an appropriate meter.
The power supply line must be protected with a residual current circuit breaker
(RCCB) with a trip current <= 30 mA.
Always connect earth ground to the device at the indicated protective earth
terminal (PE or earth symbol indication).
Always unplug a power plug from the socket only at the intended gripping
surface, pull the power plug not the cord from a power outlet. Wires may rip
out and pose danger to life through electric shock.
Maintain sufficient cooling of the product according to its specifications.
1.4 Operation
• Use the product in the specified environment. Use outside of the specifications can damage the
product and/or stop any operation.
•The product may not be exposed to extreme temperatures, direct sunlight or strong vibrations.
Protect the product from moisture, dust and dirt.
Operation in environments with excessive dust, flammable gases, vapours or
solvents is not permitted. It may cause explosion or fire.
Depending on the cooling type, the product housing may reach temperatures
above 60°C which can burn the skin.
•Do not overload the product. Note the input/output voltages and currents as well as output
powers indicated on the product.
• Depending on the input currents and input voltages, suitable connecting cables with appropriate
cable diameter must be used. Only use the plugs and connectors supplied in the original
packaging with the product.
1.5 Maintenance and Cleaning
•If the product and/or the connecting cable is damaged, do not touch it: there is mortal danger
from electric shock! First, turn off the power supply to all poles of the product (turn off
associated circuit breaker or remove the fuse, then turn off GFCI). Verify the absence of voltage
using an appropriate meter.
•For the end consumer, the product is maintenance free. Leave any maintenance to an expert.
Repairs may only be done by the factory itself (copyright holder).
•Unplug all poles of the product from the operating voltage before cleaning.
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•For external cleaning one can use a clean, soft, dry cloth. Dust can be easily removed with a
clean, soft brush and a vacuum cleaner.
•Do not use aggressive chemicals or abrasive cleaners, as this may cause discoloration or even
material changes.
•This product is equipped with fuses for protection against high voltage and high currents.
Burned fuses may only be replaced by the factory itself (copyright owner).
Never bridge a fuse, it is a fire hazard and can cause a fatal electric shock.
?
Read the Troubleshooting section to find help to common mistakes, misbehav-
ior and known issues.
1.6 Disposing
At the end of its lifecycle, do not dispose of this device in the regular household
rubbish. Return it to the supplier who will dispose of it correctly.
This product was packed and stuffed with proper materials to protect it during
transportation. Packaging materials can be recycled and should be disposed
environmentally friendly.
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2 Introduction
The ‘SEW 30’ is a battery-operated, self-setting movement that can be synchronized and configured
using a WiFi connection. There also exist the product versions ‘SAW 30’ and ‘SEW 30 Powered’, see
the table below for differences.
Features of the ‘SEW 30’:
•Uses two AA batteries (1.5V Alkaline or Lithium)
•Simply start the SEW 30’s web interface and instantly access all configuration parameters.
•
Synchronized using the ‘Network Time Protocol’ (NTP). Supports manual selection of up to five
time servers.
•
The movement periodically transmits a message that contains detailed status information and
can be used to monitor the device. This includes values such as the battery voltage or the
detection of mechanical anomalies.
•91 Timezones are available for selection. Handling of summer/winter time takes place without
user intervention.
•Initial configuration is possible using any WiFi-compatible device that has a browser installed.
•The current operating mode is indicated on two LEDs and can be controlled using two
push-buttons.
•
The second hand moves continuously. Minute / hour hands move by one step every ten seconds.
•Supports WiFi networks that use OPEN, WEP, WPA, WPA2 or WPA3 authentication modes.
‘Protected Management Frames’ (PMF) are supported.
•Time can be set manually. This is useful if a network connection is temporarily unavailable.
Product
Number Name Description
134425 SEW 30 Battery-operated WiFi movement with second hand.
134609 SAW 30 Battery-operated WiFi movement without second hand.
133515 SEW 30
Powered
WiFi movement with external power supply. No battery operation
possible.
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3 Quick Start Guide
If there are any problems when accessing the web interface, try disconnecting
your device from any other networks. Activating ’airplane mode’ and only
enabling WiFi is a reliable way to achieve this.
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Make sure to complete the setup within 10 minutes, as the web interface will
close automatically and any unsaved changes are lost.
The movement now is configured and should start displaying the current time after at most 10
minutes.
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4 Operation
4.1 Modes of Operation
Mode Button Press Blue LED Description
Initial
Configuration
‘REC’ for 2
seconds (fast red
flashing)
Flashes once
The movement generates a WiFi access
point and enables the configuration
interface. See Quick Start Guide and
Web Interface for more details.
Configuration ‘REC’ for 5
seconds (slow red
flashing)
Flashes 2
times
Connection to the configured network
is established and the configuration
interface is enabled. The movement’s ip
address must be known to use this
mode (either use a static ip or check
the router’s dhcp mapping).
Show Device
Status
‘M.SET’ for 2
seconds (fast red
flashing)
Flashes 3
times
A short configuration check is
performed. Any detected errors are
shown on the red LED. See section
Device Status below.
12h Position ‘M.SET’ for 5
seconds (slow red
flashing)
Flashes 4
times
All hands move to the 12:00 position.
After 2 minutes, normal operation will
resume.
Factory Reset ‘REC’ for 20
seconds
(permanent red
light)
Flashes 5
times
The movement will automatically
restart and reset any stored
configuration parameters. All settings
will need to be entered again.
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4.2 Device Status
When this mode is triggered, the movement will attempt to establish the WiFi connection, reach the
NTP server(s) and transmit the status message. During this process, the blue LED will keep blinking.
After it is done, the red LED will show one or multiple of the following error codes:
Error Red LED Description
None Off No error was detected.
Battery Flashes once The battery voltage is too low for normal operation.
WiFi Flashes 2 times Connection to the WiFi access point is not possible. There
might be a problem with the ssid/password configuration.
NTP Flashes 3 times Time synchronization not possible. Check the
movement’s NTP server settings. There might be a
problem resolving the hostnames using DNS (only if the
NTP servers were not entered by ip).
Syslog Flashes 4 times The syslog server cannot be reached. If it is specified by
hostname, it could likely not be resolved properly (DNS).
Mechanical Flashes 5 times Position of second/minute/hour hands cannot be
detected.
Each pattern is repeated 3 times. If there are multiple problems, the corresponding error codes are
shown sequentially.
If the battery voltage is very low, the blue LED’s blinking might not be visible.
The red LED is not affected by this and will still show any active errors at most
30 seconds after the mode is triggered.
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5 Web Interface
The web interface can be used to view and modify the device configuration. The following chapters
describe all of its elements. Similar texts can also be displayed in-browser by hovering the cursor over
the setting in question (only on pc/laptop).
This interface can be accessed in two different ways. See Modes of Operation for more details:
•
‘Initial Configuration’ (press ‘REC’ for 2 seconds): The movement generates an access point that
any WiFi device can join as a client. The interface is then reachable under the url
‘http://192.168.1.1/’ using any browser. This mode is used during the initial setup, but can also be
activated at any other time.
•‘Configuration’ (press ‘REC’ for 5 seconds): The movement connects to the access point
specified in the device settings (i.e. the network also used for time synchronization). In order to
access the interface, the device’s ip address must be known. This is either achieved by setting
up a static ip beforehand or checking the WiFi router’s dhcp mappings. The interface can then
be reached using the url ‘http../’, where ‘ip’ is replaced with the movement’s ip address
(e.g. ‘192.168.1.1’)
For the ‘SEW 30’ and ‘SAW 30’ product variants, the web interface automatically closes after 10
minutes and any unsaved modifications are lost. Configuration is permanently accessible for the ‘SEW
30 Powered’ variant.
5.1 State
Using the options listed under ‘State’, some aspects of the movement’s operation can be temporarily
modified. These settings take effect immediately and are lost after a restart of the movement.
5.1.1 12h Mode
When the 12h mode is enabled, all hands move to position 12:00. After disabling this checkmark, the
movement will return to normal operation and show the current time (provided it is currently
synchronized).
5.1.2 Manual Time
This field allows manual synchronization of the movement, which is useful for testing or when the
network connection temporarily is unavailable. When a new time is received over NTP, any values
entered manually are overridden. If NTP is disabled, the movement will stay synchronized indefinitely.
In order to ensure correct handling of timezones and daylight saving time, ‘Coordinated Universal
Time’ (UTC) should be used when entering time and date.
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5.2 Configuration
The following sections describe all configuration items. Any modifications to these settings need to be
confirmed using the ‘Save’ button. All values are permanently stored and thus preserved even when the
batteries are removed. Use ‘Factory Reset’ in the chapter ‘Modes of Operation’ to restore the defaults.
5.2.1 General
Name Default Value Description
Timezone Berlin Timezone used by the movement. This parameter also
sets up automatic handling of daylight saving time.
Hostname sew30
The movement uses this hostname when connecting to a
network. It is recommended to enter an easily identifiable
name that does not contain special characters.
Pause Second
Hand at Night
off This option stops moving the second hand between 20:00
and 06:00, which significantly improves battery life.
Ignore Low
Battery
off
By default, the second hand will permanently stop at 12:00
in case of the battery running low. If this behavior is not
desired or not working properly due to a special type of
battery being used, it can be disabled by activating the
option ‘Ignore Low Battery’.
5.2.2 Network Connection
Name Default Value Description
Authentication WPA2 Authentication mode used when connecting to the WiFi
network. When the WiFi scanner is used, this parameter
set automatically.
SSID defaultssid Name of the WiFi network. The movement will connect to
this network for time synchronization and transmission of
the status message.
PSK defaultpassword Password needed to access the network.
When setting up the WiFi connection, the ‘WiFi Scanner’ can be used to quickly fill out the
‘Authentication’ and ‘SSID’ fields. Simply select the desired network from the drop-down menu and
click on the ‘Use’ button. After this, only the ‘PSK’ needs to be entered manually.
The authentication modes WEP, OPEN and WPA are insecure and should be
avoided. It is recommended to use WPA2. WPA3 is also supported, but leads
to a shorter battery life.
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5.2.3 Network Time Protocol
Name Default Value Description
Enable NTP on If disabled, no automatic synchronization takes
place and time needs to be set manually.
Interval 1 day (SEW 30 / SAW
30) 5 minutes (SEW 30
Powered)
Time synchronization takes place this often. Lower
values lead to more accurate time but shorter battery
life. The default value of 1 day provides a good
balance between battery life and accuracy.
NTP Servers 0.pool.ntp.org
1.pool.ntp.org
2.pool.ntp.org
3.pool.ntp.org
pool.ntp.org
The first reachable server is used for time
synchronization, starting from server 1. Each server
can be specified either by ip address or hostname.
5.2.4 Monitoring
Name Default Value Description
Enable Syslog on Enable / disable the status message.
Interval 1 day (SEW 30 / SAW
30) 1 hour (SEW 30
Powered)
The status message is sent in this often. This value
also impacts battery life and should typically be set
either to the same as time synchronization or to a
longer interval.
Syslog Server 192.168.46.49 This server can be specified either by ip address or
by hostname. Status messages are sent to UDP port
514 of this device.
5.2.5 Static IP Address
Name Default Value Description
Use Static IP off If enabled, an ip address can be manually assigned
to the movement. Otherwise, DHCP is used to obtain
an ip address.
IPv4 Address - IPv4 address used by the movement. There must be
no other device with the same address.
IPv4 Mask - IPv4 network mask
IPv4 Gateway - Gateway used for reaching any servers outside of
this network (e.g. the time servers)
IPv4 DNS - DNS server needed to resolve domain names
(e.g. ntp servers and/or the syslog server)
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5.2.6 Config Management
Name Default Value Description
AP PSK 12345678 Password needed to access the ‘Initial Configuration’
mode.
Pressing the ‘Save’ button stores any modifications to the configuration but does not apply them until
the web interface is quit. After ‘Apply / Quit’ is clicked, the new configuration is used and the web
interface is stopped. The ‘SEW 30 Powered’ movement will always keep the web interface reachable
from within the configured network. When the configuration was changed, the browser window might
need to be reloaded and it can take a few seconds until the interface is shown again.
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6 Status Message
The movement can be configured to periodically transmit its status to a server. In addition, any
detected errors are reported immediately (e.g. in case of a mechanical problem). The contents of this
message are structured according to the syslog protocol defined in RFC 5424.
‘STRUCTURED-DATA-ELEMENTS’ are used to encode the different parameters.
Data ID Description
serial Serial number of the movement
item Item number that indicates the product type.
mac MAC-Address of the movement.
ip Current ip address of the movement
(assigned statically or received using DHCP)
alarm All active alarms encoded using bitwise ‘OR’:
0x01 = Not synchronized
0x02 = Battery voltage too low
0x04 = Mechanical error
0x08 = Device restart
versionclock Firmware version (movement).
versionwlan Firmware version (wifi).
lastsource Time server that was used during the previous time synchronization
(ip address or hostname).
lastsync Timestamp received from this server.
lastdeviation Offset corrected during the previous time synchronization.
uptime Number of seconds since startup.
stepslostsec Position error that was corrected,
in number of second hand steps (16Hz)
stepslostmin Position error that was corrected,
in number of minute hand steps (0.1Hz)
oscaccuracy Estimated frequency deviation of the internal oscillator.
timesource Type of time source used.
0 = not synchronized
1 = NTP
2 = Manual (NTP enabled)
3 = Manual (NTP disabled)
voltagemean Mean battery voltage during previous wifi connection.
voltagevar Variance of battery voltage during previous wifi connection.
voltagemin Minimum battery voltage during previous wifi connection.
chargeused Approximate battery charge consumed since startup.
wifirssi Received signal strength indicator (RSSI).
wifipower Value of internal transmit power setting.
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7 Tips and Troubleshooting
7.1 Recommended Setup
Configuration and environment significantly affect the movement’s battery life. Because of the
wireless network connection, there are also security aspects that need to be considered. The following
section shows a possible setup and the tradeoffs involved. Any hints regarding battery life can be
ignored for the ‘SEW30 Powered’ variant, because it includes an external power supply.
•Use 1.5V lithium AA batteries. This type of battery is more expensive but allows the movement
to operate for a longer time.
•
It is recommended to use a dedicated WiFi network for the movements. Access from within the
network can be limited to the time servers, the syslog server (if required) and the DNS server (if
required). This allows the movements to function while limiting the potential damage an
attacker can cause. On many routers, it is also possible prevent any unauthorized devices from
connecting at all (e.g. by using a mac address whitelist).
•
The WiFi network uses WPA2 and has “Protected Management Frames” (PMF) disabled. WPA3
and PMF would provide increased security, but negatively affect the battery life. Networks that
are open, use WEP or WPA1, are insecure and should not be used.
•Change the default password during initial configuration.
•
If possible, enable the option ‘Pause Second Hand at Night’. This will cause the second hand to
be stopped between 20:00 and 06:00, significantly increasing the battery life. Make sure that
this behavior is not confused with the low-battery warning, where the second hand is
permanently stopped.
•For maximum battery life, intervals of time synchronization and status message should be set
as large as possible and to the same value. Typically, the default interval of 1 day is a good
tradeoff between accuracy and energy consumption. In cases where larger time errors are not
noticeable, for example when using the SAW 30 (no second hand), it could make sense to
increase the interval (e.g. 2 days or 1 week).
•Do not mix batteries of different types (e.g. lithium and alkaline) or different discharge states
(e.g. full and empty). Not following this recommendation will result in reduced battery life.
When using lithium AA batteries, the manufacturer’s safety recommendations
must be observed. Recharging, short-circuiting or mechanically damaging
such a battery may present a fire and/or explosion hazard.
Never use lithium batteries with a voltage of 4.2V! This might damage move-
ment and batteries, posing a potential fire hazard.
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7.2 Further Behaviors
The following information might be useful when troubleshooting:
•If time synchronization fails, a retry is started after a third of the configured interval. Using the
default synchronization interval of 1 day, this corresponds to 8 hours.
•
If NTP is enabled and no new time information is received for more than 7 days, the movement
will stop all hands at 12:00. This behavior is deactivated when NTP is disabled and time is set
manually.
•The low-battery alarm is based on periodic measurements of the battery voltage. When the
movement is reset while the low-battery alarm is present, for example by removing and then
re-inserting the batteries, information is lost and it might take a while before the alarm returns.
This only temporarily removes the alarm and does not increase battery life!
•For security reasons, the configured wifi password cannot be accessed after it was set. The
typical ‘****’ is shown in the webinterface but the number of characters is not adjusted
depending on the password length. For any change to the password, it must completely be
re-entered.
•The UDP protocol used to transmit the status message does not ensure reliable message
delivery. The log sometimes missing a single message does not necessarily indicate a problem.
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7.3 Troubleshooting
During troubleshooting, it might be helpful to activate the ‘Device Status’ mode, as described in
‘Modes of Operation’. The following sections show some common problems and solutions.
The configuration page cannot be reached.
The browser attempts to establish a connection using HTTPS. The movement only supports HTTP.
Replace “https” with “http” in the browser’s address bar.
The configuration page cannot be reached (Movement as access point).
The laptop or smartphone is successfully connected to the movement’s access point, but attempts to
reach the configuration page using the wrong network interface. Temporarily disconnect any other
network connections (e.g. ethernet cable, 4G, ...) and try again. The browser and/or the computer
might need to be restarted.
Second hand permanently stopps at 12:00.
Low-battery warning is active. Replace the batteries. This low-battery warning can be disabled using
the configuration option ‘Ignore Low Battery’.
No hands are moving after insertion of the batteries.
The movement reports a mechanical error.
For shipping, the gearbox is blocked by a needle. This needle must be removed!
Second hand stopps at 12:00, but only during the night.
The setting ‘Pause Second Hand at Night’ is enabled. Use the configuration interface to disable this
behavior.
The movement is unable to synchronize and stops all hands at 12:00.
Batteries are empty and need to be replaced.
The blue LED is barely visible when it should be blinking.
Batteries are empty and need to be replaced.
In the ‘Initial Configuration’ mode, no connection to the access point is possible.
A different device might already be connected. The movement does not allow connections from more
than one client at the same time. By removing the batteries for a few seconds and then starting the
mode again, any ongoing connections to other devices can be terminated. Some devices, such as
laptops, provide the option ‘Connect Automatically’ when logging into a WiFi network. This should be
left disabled because it could prevent other users from connecting.
Batteries are full but all hands are stopped at 12:00.
There is no time synchronization possible. Make sure that the device configuration was set. It is also
possible that the network is temporarily unavailable or the NTP server cannot be reached. If none of
these errors are present, try restarting the movement by removing and re-inserting the batteries.
The movement does not show the correct time and pauses every few seconds.
The batteries are at a very low level and cause the movement to restart each time network
communication is attempted. This can be confirmed by checking that the red LED blinks when the
hands begin moving. The error can be resolved by inserting new batteries.
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