METREL EurotestXE MI 3102H User manual

EurotestXE 2,5 kV
MI 3102H
Instruction manual
Version 1.2, Code No. 20 751 565

2
Distributor:
Manufacturer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: [email protected]
© 2004 -2009 METREL
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and interference causing equipment regulations.
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.

MI 3102H Table of contents
3
1Preface ......................................................................................................... 5
2Safety and operational considerations ..................................................... 6
2.1 Warnings and notes.................................................................................... 6
2.2 Batteries ..................................................................................................... 9
2.3 Charging ..................................................................................................... 9
2.4 Precautions on charging of new battery cells or cells unused for a longer
period ....................................................................................................... 10
2.5 Standards applied..................................................................................... 11
3Instrument description ............................................................................. 12
3.1 Front panel ............................................................................................... 12
3.2 Connector panel ....................................................................................... 13
3.3 Back panel................................................................................................ 14
3.4 Bottom view .............................................................................................. 15
3.5 Carrying the instrument ............................................................................ 16
3.6 Instrument set and accessories ................................................................ 17
4Instrument operation ................................................................................ 18
4.1 Meaning of symbols and messages on the instrument display .......................... 18
4.1.1 The online voltage and output terminal monitor ................................... 18
4.1.2 Message field – battery status.............................................................. 19
4.1.3 Message field – measurement warnings / messages........................... 19
4.1.4 Result field ........................................................................................... 20
4.1.5 Other messages ................................................................................... 20
4.1.6 Sound warnings.................................................................................... 21
4.1.7 Function and parameter line................................................................. 21
4.2 Selecting measurement function / subfunction ......................................... 21
4.3 Setting measurement parameters and limits ............................................ 22
4.4 Help menu ................................................................................................ 22
4.5 Setup menu .............................................................................................. 22
4.5.1 Prospective short/fault current scaling factor adjustment ..................... 23
4.5.2 Language selection .............................................................................. 23
4.5.3 Communication port selection .............................................................. 23
4.5.4 Plug / Tip commander support ............................................................. 24
4.5.5 Recalling original settings..................................................................... 24
4.6 Display contrast adjustment...................................................................... 25
5Measurements........................................................................................... 26
5.1 Insulation resistance................................................................................. 26
5.1.1 Insulation resistance measuring procedure.......................................... 26
5.1.2 The DAR and PI diagnostic .................................................................. 28
5.2 Continuity.................................................................................................. 31
5.2.1 LowΩresistance................................................................................... 31
5.2.2 Continuity ............................................................................................. 34
5.3 Testing RCDs ........................................................................................... 36
5.3.1 Limit contact voltage............................................................................. 36
5.3.2 Nominal differential trip-out current ...................................................... 36
5.3.3 Multiplier of nominal residual current.................................................... 36
5.3.4 RCD type and test current starting polarity........................................... 36
5.3.5 Testing selective (time-delayed) RCDs ................................................ 37
5.3.6 Contact voltage .................................................................................... 37

MI 3102H Table of contents
4
5.3.7 Trip-out time ......................................................................................... 39
5.3.8 Trip-out current..................................................................................... 41
5.3.9 Autotest ................................................................................................ 42
5.4 Fault loop impedance and prospective fault current ................................. 46
5.4.1 Fault loop impedance ........................................................................... 46
5.4.2 RCD trip-lock function .......................................................................... 48
5.5 Line impedance and prospective short-circuit current .............................. 51
5.6 Phase sequence testing ........................................................................... 53
5.7 Voltage and frequency.............................................................................. 54
5.8 Resistance to earth................................................................................... 56
5.9 TRMS current ........................................................................................... 58
5.10 Illumination ............................................................................................... 60
5.11 Testing PE terminal .................................................................................. 62
6Working with results................................................................................. 64
6.1 Saving results ........................................................................................... 65
6.2 Recalling results ....................................................................................... 66
6.3 Deleting results......................................................................................... 68
7RS 232 / USB communication .................................................................. 71
7.1 EuroLink PRO PC software ...................................................................... 71
8Maintenance............................................................................................... 73
8.1 Replacing fuses ........................................................................................ 73
8.2 Cleaning ................................................................................................... 73
8.3 Periodic calibration ................................................................................... 73
8.4 Service...................................................................................................... 73
9Technical specifications........................................................................... 74
9.1 Insulation resistance................................................................................. 74
9.2 Continuity resistance ................................................................................ 75
9.2.1 LowΩresistance................................................................................... 75
9.2.2 Continuity ............................................................................................. 75
9.3 RCD testing .............................................................................................. 76
9.3.1 General data ........................................................................................ 76
9.3.2 Contact voltage .................................................................................... 76
9.3.3 Trip-out time ......................................................................................... 76
9.3.4 Trip-out current..................................................................................... 77
9.4 Fault loop impedance and prospective fault current ................................. 78
9.5 Line impedance and prospective short-circuit current .............................. 79
9.6 Resistance to earth................................................................................... 79
9.7 TRMS current ........................................................................................... 80
9.8 Illumination ............................................................................................... 80
9.8.1 Illumination (Luxmeter sensor, type B)................................................. 80
9.8.2 Illumination (Luxmeter sensor, type C)................................................. 80
9.9 Phase rotation .......................................................................................... 80
9.10 Voltage and frequency.............................................................................. 81
9.11 Online voltage monitor.............................................................................. 81
9.12 General data............................................................................................. 81
AFuse base tables ....................................................................................... 83
A.1 Fuse base table ........................................................................................ 83
BAccessories required for specific measurement.................................... 88

MI 3102H Preface
5
1 Preface
Congratulations on your purchase of the EurotestXE 2,5 kV instrument and its
accessories from METREL. The instrument was designed on basis of rich experience,
acquired through many years of dealing with electric installation test equipment.
The EurotestXE 2,5 kV instrument is professional, multifunctional, hand-held test
instrument intended for all measurements performed for total inspection of electrical
installations in buildings. The following measurements and tests can be performed:
Voltage and frequency,
Continuity (LowΩand continuity function),
Insulation resistance / Diagnostic test (PI, DAR calculation),
RCD testing,
Fault loop / RCD trip-lock impedance,
Line impedance,
Phase sequence,
Resistance to earth,
TRMS current,
Illumination.
Large graphic matrix display with backlight offers easy to read results, indications,
measurement parameters and messages. Operation is simple and clear – operator
does not need any special training (except reading this instruction manual) to operate
the instrument.
In order for operator to be familiar enough with measurements in general and typical
applications it is advisable to read Metrel handbook Guide for testing and verification of
low voltage installations.
The instrument is equipped with all accessories necessary for comfortable testing. It is
kept in a soft carrying bag together with all accessories.

MI 3102H Safety and operational considerations
6
2 Safety and operational considerations
2.1 Warnings and notes
In order to reach high level of operator’s safety while carrying out various tests and
measurements using the EurotestXE 2,5 kV instrument, as well as to keep the test
equipment undamaged, it is necessary to consider the following general warnings:
symbol on the instrument means »Read the Instruction manual with
special care to safety operation«. The symbol requires an action!
If the test equipment is used in a manner not specified in this user manual
the protection provided by the equipment may be impaired!
Read this user manual carefully, otherwise use of the instrument may be
dangerous for the operator, for the instrument or for the equipment under
test!
Do not use the instrument and accessories if any damage is noticed!
In case a fuse has blown follow the instructions in this manual to replace it!
Consider all generally known precautions in order to avoid risk of electric
shock while dealing with hazardous voltages!
Do not use the instrument in supply systems with voltages higher than
550 V!
Service intervention or adjustment procedure is allowed to be carried out
only by a competent authorized person!
Use only standard or optional test accessories supplied by your
distributor!
Consider that older and some of new optional test accessories compatible
with this instrument meet only overvoltage category CAT III / 300 V!
It means that maximal allowed voltage between test terminals and ground
is 300 V!
Instrument contains rechargeable NiCd or NiMH battery cells. The cells
should only be replaced with the same type as defined on the battery
placement label or in this manual. Do not use standard alkaline battery
cells while power supply adapter is connected, otherwise they may
explode!
Hazardous voltages exist inside the instrument. Disconnect all test leads,
remove the power supply cable and switch off the instrument before
removing battery compartment cover.
Do not connect any voltage source on CLAMP CURRENT input. It is
intended only for connection of current clamp with current output. Maximal
continuous input current is 30 mA!
All normal safety precautions have to be taken in order to avoid risk of
electric shock when working on electrical installations!

MI 3102H Safety and operational considerations
7
Warnings related to measurement functions
Insulation resistance
Insulation resistance measurement should only be performed on de-energized
objects!
When measuring insulation resistance between installation conductors all loads
must be disconnected and all switches closed!
Do not touch the test object during the measurement or before it is fully
discharged! Risk of electric shock!
When an insulation resistance measurement has been performed on a capacitive
object automatic discharge may not be done immediately! Warning message
and actual voltage is displayed during discharge, until voltage drops below 10 V.
Do not connect test terminals to external voltage higher than 600 V (AC or DC) in
order not to damage the test instrument!
Continuity functions
Continuity measurements should only be performed on de-energized objects!
Parallel impedances or transient currents may influence test results.
Testing PE terminal
If phase voltage is detected on the tested PE terminal, stop all measurements
immediately and take care the fault is eliminated before proceeding with any
activity!
Notes related to measurement functions
General
Indicator means that the selected measurement cannot be performed
because of irregular conditions on input terminals.
Insulation resistance, continuity functions and earth resistance measurements
shall be performed on de-energized objects.
PASS / FAIL indication is enabled when limit is set. Apply appropriate limit value
for evaluation of measurement results.
In case that only two of three wires are connected to tested electrical installation,
only voltage indication between these two wires is valid.
Insulation resistance
The special two wire 2.5 kV test lead must be used for the insulation test with 2.5
kV.
The standard three-wire test lead, schuko test cable or Plug / Tip commanders
can be used for the insulation test with 1kV.
Continuity functions
If voltage between test terminals is higher than 10 V the continuity functions
cannot be performed.

MI 3102H Safety and operational considerations
8
Before performing continuity measurement compensate test lead resistance if
necessary. The compensation is performed in LowΩfunction.
RCD functions
Parameters set in one function are also kept for other RCD functions!
The measurement of contact voltage does not normally trip an RCD. However,
the trip limit may be exceeded as a result of leakage current flowing to the PE
protective conductor or a capacitive connection between L and PE conductors.
RCD trip-lock sub-function (function selector switch in LOOP position) takes
longer to complete but offers much better accuracy of fault loop resistance result
(in comparison with the RLsub-result in Contact voltage function).
RCD trip-out time and RCD trip-out current measurements will be performed only
if contact voltage in pre-test at nominal differential current is lower than the set
limit contact voltage!
The autotest sequence (RCD AUTO function) stops when trip-out time is out of
allowed time period.
Fault loop / RCD trip-lock impedance
L and N test terminals are reversed automatically if L/L1 and N/L2 test leads (3-
wire test lead) are connected in reversed way, or terminals of the tested wall plug
are reversed, or plug commander is turned around.
Low limit prospective short-circuit current value depends on fuse type, fuse
current rating, fuse trip-out time and IPSC scaling factor.
Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement.
Fault loop impedance measurement trips an RCD.
The measurement of fault loop impedance using trip-lock function does not
normally trip an RCD. However, the trip limit may be exceeded as a result of
leakage current flowing to the PE protective conductor or a capacitive connection
between L and PE conductors.
Line impedance
Low limit prospective short-circuit current value depends on fuse type, fuse
current rating, fuse trip-out time and IPSC scaling factor.
Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement.
Resistance to earth
If voltage between test terminals is higher than 30 V the resistance to earth
measurement will not be performed.
If a noise voltage higher than approx. 5 V is present between the H and E or S test
terminals, “” (noise) warning symbol will be displayed, indicating that the test
result may not be correct!

MI 3102H Safety and operational considerations
9
TRMS current
Use test clamp supplied by Metrel or other with similar characteristics (current
output, 1000:1, appropriate measurement range, consider error of test clamp
when evaluating measured results)!
Current clamps Metrel A 1074 and A 1019 are suitable for use with MI 3102
EurotestXE 2,5 kV instrument in range 0.2 A … 20 A. Below 0.2 A they can be
used as indicator only. They are not suitable for leakage current measurements.
The only Metrel current clamps, suitable for leakage current measurements, are
A 1018 (1000 A /1 A).
Illumination
For accurate measurement make sure that the milk glas bulb is lit without any
shadows cast by hand, body or other unwanted objects.
It is very important to know that the artificial light sources reach full power of
operation after a period of time (see technical data for light sources) and should
be therefore switched on for this period of time before the measurements are
taken.
Testing PE terminal
PE terminal can be tested in RCD, LOOP and LINE function selector switch
positions only!
For correct testing of PE terminal, the TEST key has to be touched for a few
seconds.
Make sure to stand on non-isolated floor while carrying out the test, otherwise
test result may be wrong!
2.2 Batteries
When battery cells have to be replaced or before opening battery/fuse
compartment cover, disconnect any measuring accessory connected to the
instrument and power off the instrument, hazardous voltage inside!
Insert cells correctly, otherwise the instrument will not operate and the batteries
could be discharged.
If the instrument is not used for a long period of time remove all batteries from
the battery compartment.
Alkaline or rechargeable NiCd or NiMH batteries (size AA) can be used. The
operating hours are given for cells with a nominal capacity of 2100 mAh.
Do not recharge alkaline battery cells!
2.3 Charging
The battery is charged whenever the power supply adapter is connected to the
instrument. In-built protection circuits control the charging procedure and assure
maximal battery lifetime. Power supply socket polarity is shown in figure 2.1.

MI 3102H Safety and operational considerations
10
+
-
Figure 2.1: Power supply socket polarity
Note:
Use only power supply adapter delivered from manufacturer or distributor of the
test equipment to avoid possible fire or electric shock!
2.4 Precautions on charging of new battery cells or cells
unused for a longer period
Unpredictable chemical processes can occur during charging of new battery cells or
cells that were unused for a longer period of time (more than 3 months). NiMH and NiCd
cells are affected to a various degree (sometimes called as memory effect). As a result
the instrument operation time can be significantly reduced at the initial charging /
discharging cycles.
Therefore it is recommended:
To completely charge the battery (at least 14h with in-built charger).
To completely discharge the battery (can be performed with normal work with the
instrument).
Repeating the charge / discharge cycle for at least two times (four cycles are
recommended).
When using external intelligent battery chargers one complete discharging / charging
cycle is performed automatically.
After performing this procedure a normal battery capacity is restored. The operation
time of the instrument now meets the data in the technical specification.
Notes:
The charger in the instrument is a pack cell charger. This means that the cells
are connected in series during the charging so all of them must be in similar state
(similarly charged, same type and age).
Even one deteriorated battery cell (or just of an another type) can cause an
improper charging of the entire battery pack (heating of the battery pack,
significantly decreased operation time).
If no improvement is achieved after performing several charging/discharging
cycles the state individual battery cells should be determined (by comparing
battery voltages, checking them in a cell charger, etc). It is very likely that only
some of the cells are deteriorated.
The effects described above should not be mixed with normal battery capacity
decrease over time. All charging batteries lose some of their capacity when
repeatedly charged/discharged. The actual decrease of capacity versus number
of charging cycles depends on battery type and is provided in the technical
specification from battery manufacturer.

MI 3102H Safety and operational considerations
11
2.5 Standards applied
The EurotestXE 2,5 kV instrument is manufactured and tested in accordance with the
following regulations:
Electromagnetic compatibility (EMC)
EN 61326 Electrical equipment for measurement, control and laboratory
use – EMC requirements
Class B (Hand-held equipment used in controlled EM
environments)
Safety (LVD)
EN 61010-1 Safety requirements for electrical equipment for measurement,
control and laboratory use – Part 1: General requirements
EN 61010-031 Safety requirements for hand-held probe assemblies for electrical
measurement and test
EN 61010-2-032 Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-032: Particular requirements
for hand-held and hand-manipulated current sensors for electrical
test and measurement
Functionality
EN 61557 Electrical safety in low voltage distribution systems up to 1000
VAC and 1500 VAC – Equipment for testing, measuring or
monitoring of protective measures
Part 1 ......... General requirements
Part 2 ......... Insulation resistance
Part 3 ......... Loop resistance
Part 4 ......... Resistance of earth connection and equipotential
bonding
Part 5 ......... Resistance to earth
Part 6 ......... Residual current devices (RCDs) in TT and TN
systems
Part 7 ......... Phase sequence
Part 10........ Combined measuring equipment
DIN 5032 Photometry
Part 7 ......... Classification of illuminance meters and luminance
meters
Other reference standards for testing RCDs
EN 61008 Residual current operated circuit-breakers without integral
overcurrent protection for household and similar uses
EN 61009 Residual current operated circuit-breakers with integral
overcurrent protection for household and similar uses
EN 60364-4-41 Electrical installations of buildings
Part 4-41 .... Protection for safety – protection against electric
shock
BS 7671 IEE Wiring Regulations
Note about EN and IEC standards:
Text of this manual contains references to European standards. All standards of
EN 6XXXX (e.g. EN 61010) series are equivalent to IEC standards with the same
number (e.g. IEC 61010) and differ only in amended parts required by European
harmonization procedure.

MI 3102H Instrument description
12
3 Instrument description
3.1 Front panel
1
2
7
6
5
4
3
Figure 3.1: Front panel
Legend:
1........ ON/OFF key, to switch on or off the instrument.
The instrument is automatically switched off 10 minutes after the last key was
pressed or function switch rotated.
2........ Function selector switch.
3........ MEM key, to access memory operations.
4........ HELP/CAL key, to access help menus. CAL function is enabled in low-value
resistance measurement to compensate test leads resistance.
5........ Jogger keypad with cursors and TEST keys.
The TEST key also acts as the PE touching electrode.
6…….BACKLIGHT and CONTRAST key, to change backlight level and contrast.
High level backlight is automatically shut off 20 seconds after the last strike of
any key or function switch rotation in order to extend service life of the battery.
7........ 128 ×64 dots matrix display with backlight.

MI 3102H Instrument description
13
3.2 Connector panel
13
2
> 550V
4
5
6
Figure 3.2: Connector panel
Legend:
1........ Test connector.
Warning! Maximal allowed voltage between test terminals and ground is 600
V! Maximal allowed voltage between test terminals is 550 V!
In resistance to earth function test connector terminals are used as follows:
L/L1 black test lead is used for the auxiliary earth electrode (H).
N/L2 blue test lead is used for the earth electrode (E).
PE/L3 green test lead is used for the probe (S).
2........ Power supply socket.
3........ RS 232 connector.
4........ Protection connector cover.
5........ USB connector.
6........ CLAMP CURRENT input.
Warning! Do not connect any voltage source on this input. It is intended for
connection of current clamp with current output only. Maximal continuous input
current is 30 mA!

MI 3102H Instrument description
14
3.3 Back panel
12
3
Figure 3.3: Back panel
Legend:
1........ Battery/fuse compartment cover.
2........ Information label.
3........ Fixing screws for battery/fuse compartment cover.
56
4
1
2
3
F1
F3
F2
Fuse
Fuse
Fuse
SIZE AASIZE AA
SIZE AA
SIZE AASIZE AASIZE AA
S/N XXXXXXXX
Figure 3.4: Battery and fuse compartment

MI 3102H Instrument description
15
Legend:
1........ Fuse F1.
2........ Fuse F2.
3........ Fuse F3.
4........ Serial number label.
5........ Battery cells (size AA).
6........ Battery holder.
3.4 Bottom view
Figure 3.5: Bottom view
Legend:
1........ Information label.
2........ Neck belt openings.
3........ Handling side covers.

MI 3102H Instrument description
16
3.5 Carrying the instrument
With the neck carrying belt supplied in standard set, various possibilities of carrying the
instrument are available. Operator can choose appropriate one on basis of his / her
operation, see the following examples:
The instrument is hung
around operator's neck
only - quick placing and
displacing.
The instrument can be used even placed in
soft carrying bag – test cable connected to the
instrument through the front aperture.

MI 3102H Instrument description
17
3.6 Instrument set and accessories
Instrument EurotestXE 2,5 kV MI 3102H
Soft carying bag
Soft carying neck belt
Measuring accessories*) Test lead, 3 ×1.5 m
2.5 kV insulation test lead, 2 ×1.5 m
Tip commander with two function keys, 1.5 m
Schuko plug test cable
Test probe, 3 pcs (black, blue, green)
Crocodile clip, 3 pcs (black, blue, green)
Earth test set – 20 m:
Test lead, black, 20 m
Test lead, blue, 4.5 m
Test lead, green, 20 m
Test rod, 2 pcs
Documentation Short instruction manual
Calibration certificate
Battery 6 x NiMH rechargeable batteries
Power supply adapter
Cables RS232 – PS/2 cable
USB cable
CD-ROM Instruction manual
Short instruction manual
Handbook “Guide for testing and verification of low voltage
installations”
PC software EuroLink PRO
Optional accessories*)
Plug commander with two function keys
Three-phase adapter
Three-phase adapter with switch
Test lead, black, 50 m
Current clamp (low range, leakage)
Mini current clamp
Connection cable for mini current clamp
Luxmeter sensor, type B
Luxmeter sensor, type C
Fast 12 cells charger (C and AA sizes)
Fast 6 cells charger (AA size)
*) Please, see the attached sheet to compare received set of accessories with listed one.
See also the attached sheet for a list of optional accessories that are available on
request from your distributor.

MI 3102H Instrument operation
18
4 Instrument operation
4.1 Meaning of symbols and messages on the instrument display
The instrument display is divided into four sections:
1
2
3
4
Figure 4.1: Display outlook
Legend:
1........ Function and parameter line.
In the top display line the measuring function/sub-function and parameters are
displayed.
2........ Result field.
In this field the main result and sub-results together with the PASS / FAIL /
ABORT status are displayed.
3........ Online voltage and output monitor.
4........ Message field.
4.1.1 The online voltage and output terminal monitor
Online voltage is displayed together with test terminal
indication. All three test terminals are used for selected
measurement.
Online voltage is displayed together with test terminal
indication. L and N test terminals are used for selected
measurement.
Polarity of test voltage applied to the output terminals, L
and N.
Unknown supply system.
L – N polarity changed.
fri Frequency out of range.

MI 3102H Instrument operation
19
4.1.2 Message field – battery status
Battery power indication.
Low battery indication. Battery pack is too weak to
guarantee correct result. Replace the batteries.
Recharging is running (if power supply adapter is
connected).
4.1.3 Message field – measurement warnings / messages
Warning! High voltage is applied to the test terminals.
Warning! Phase voltage on the PE terminal! Stop all the
measurements immediately and eliminate the fault before
proceeding with any activity!
Measurement is running. Consider any displayed
warnings!
Measurement can be performed after pressing the TEST
key. Consider any displayed warning after starting the
measurement!
Measurement prohibited. Consider any displayed
warnings and check online voltage/terminal monitor!
Co Test leads resistance in low-value resistance
measurement is compensated.
RCD tripped during the measurement. The trip limit may
be exceeded as a result of leakage current flowing to the
PE protective conductor or capacitive connection
between L and PE conductors.
RCD not tripped during the measurement.
Instrument overheated. Temperature of internal
components in the instrument reached top limit.
Measurement is prohibited until the temperature is lower
then that limit.
Battery capacity is too low to guarantee correct result.
Replace the batteries.

MI 3102H Instrument operation
20
Fuse F1 (continuity circuit) blown or not inserted.
Noise voltage is present between H and E or S test
terminals.
Resistance of auxiliary earth electrode is higher than
100×RE. Check the auxiliary earth electrode.
Probe resistance is higher than 100×RE. Check the
probe.
Resistances of auxiliary earth electrode and probe are
higher than 100×RE. Check all probes.
4.1.4 Result field
Measurement passed.
Measurement failed.
Measurement is aborted. Check the conditions at the
input terminal.
4.1.5 Other messages
Hard Reset
Instrument settings and measuremet parameters/limits
are set to initial (factory) values. For more information
refer to chapter 4.5.5. Recalling original settings.
No probe Luxmeter sensor is turned off or disconnected from the
EurotestXE 2,5 kV instrument. Connect probe to the
instrument using RS 232 connector and turn it on.
First measurement First stored measurement results are displayed.
Last measurement Last stored measurement results are displayed.
Memory full All memory locations are occupied.
Already saved Measurement results already saved.
CHECK SUM ERROR Memory contents damaged. Contact your distributor or
manufacturer for further information.