Instruction Manual
Ex-Pt 720
Contents
1. Application
The Ex-Pt 720 is a precise, robust and simple to operate tempera-
ture measuring device for temperature measurements in explo-
sion-endangered areas (excluding firedamp-endangered under-
ground mining) of Zones 2 and 1 according to IEC/CENELEC.
1. Application
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2. Safety references
3. Malfunctioning and inadmissible operation
4. Safety regulations
2. Safety references
4.1 Special conditions for use in Zone 0
5. Ex-Data
This operating manual contains information and safety recommen-
dations which must be complied with in order to guarantee safe
functioning of the unit under the conditions described
6. Technical Details
7. Operating instructions
7.1 Commisioning
Please read these operating instructions very carefully before
using the unit !
7.2 Switching-on and measurement
7.2.1 Switching-on
In case of doubt (for example due to mistakes in the translation)
the German operating instructions are assumed to be valid.
7.2.2 HOLD-Function
7.2.3 Auto-Off-Function
7.2.4 Changing measuring range
7.2.5 Switching-off
3. Malfunctioning and inadmissible operation
As soon as one suspects that the safety of the equipment is end-
angered, it must be taken out of service and immediately removed
from the Ex-area. Precautions must be taken to prevent its unin-
tentional reuse.
We recommend that the unit be returned to the manufacturer for
checking.
7.3 Battery change
7.4 Temperature probe
7.4.1 Standard probe
7.4.2 Special probe
7.4.3 Calibration instructions
8. Repair
For example, the safety of the unit could be endangered when:
- damage to the housing is visible.
- the unit was subjected to improper strain.
- the unit was incorrectly stored.
- the unit was damaged in transit.
- the lettering on the unit is unreadable.
- malfunctioning occurs.
9. Cleaning and maintenance
10. Guarantee & liability
11. Declaration of EG-Conformity
12. EG-Type approval
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- obviously incorrect measurements occur.
- measurements with the unit are no longer possible.
- the permissible limiting values were exceed.
- Should the unit be used in the optionally available leather case,
t˝˝the carrying strap of the unit must still comply with the conditi-
ti˝ons for attachment to the user’s body.
4. Safety regulations
5. Ex-Data
In order to exclude incorrect operation of the unit, its use assumes
that the user is aware of and complies with the usual safety regu-
lations.
EC-test approval-no.: TÜV 01 ATEX 1757 X
Ex-designation:
II 2(1) G EEx ia IIC T4
- the batteries may only be changed outside the Ex-area.
- it is not allowed to take additional batteries into the Ex-area.
- only type approved batteries may be used.
Approved for Zone 1, equipment group II, gas group C explosions-
endangered gases, vapours or fog, temperature class T4.
- only sensors which have been approved by ecom may be used.
- It must be ensured that the unit is not taken into Zone 0.
- measurements on electrically live parts are not allowed.
- observe the measuring range of the temperature sensors.
OOverheating will damage the sensors.
Only the sensors specified in the approval certificate may be used.
Sensor no. 0628 2232 may be used in Zone 0 !
- avoid use in aggressive acids or alkalis.
6. Technical Details
- the unit may not be opened in Ex-areas.
Ambient temperature Ta: -10 ... +50°C
Storage temperature:
-20 ... +70°C
4.1 Special conditions for use in Zone 0
Batteries:
9V-Block, 6LR61 as per IEC
(only type tested batteries)
The measurement of temperatures with the Ex-Pt 720 within
Zone 0 is only permitted if the following conditions are complied
with:
Supplier
Varta
Type
Alkaline No.4822
- a stainless-steel sensor Type 0628 2232 is used.
- the Ex-Pt 720 itself may not be taken into Zone 0.
Varta
Varta
Duracell
Duracell
Duracell
Everady
Alkaline Universal No.4022
Alkaline Electric Power No.8022
Alkaline
Alkaline Ultra
Professional Alkaline Battery Procell
- It must be absolutely ensured that the unit does not find its way
a˝accidentally into Zone 0. In order to guarantee this, the carrying
ststrap of the unit must be attached additionally to the belt of the
u˝user or to a loop attached to his belt. The length of the carrying
ststrap must be so adjusted that when the unit hangs freely on the
c˝carrying strap, the Ex-Pt 720 maintains a spacing of 50cm to the
bboundary area of Zone 0.
(Ralston Energy Systems SA) Alkaline Energizer
Panasonic
Daimon
Alkaline Power Line Industrial Battery
Alkaline
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Operating life:
Dimensions:
Weight:
approx. 100h
190 x 57 x 42 mm
approx. 200g (with batteries)
ABS
7.1 Commissioning
- carefully read operating instructions.
- open back of unit with key.
Case material:
(slight discolouration due to additives)
IP-protective rating:IP 54
- insert battery correctly (observe polarity).
- insert battery safety cover.
EC-designation:
Display:
0102
- close unit with safety screw.
LCD, digit height 14mm
Measuring device: Pt 100-Sensor, 4-wire-technique
Measuring range: -50°C to +400°C
7.2 Switching-on and measuring
7.2.1 Switching-on
Accuracy:
-50°C to +199,9°C:
+200°C to +400°C:
±0,2°C, ±1 digit
±0,2% from measured
value, ±1 digit
Insert sensor into measuring socket (take note of plug coding).
Switch unit on with >I/O pushbutton<.
After switching on, a short display and function test will take
place. The measuring instrument is now ready for use.
Resolution:
-50°C to +199,9°C:
+200°C to +400°C:
0,1°C
1°C
7.2.2 Hold-Function
System accuracy: -50°C to +99,9°C:
±0,6°C, ±1 digit
(with immersion/
insertion sensor)
The measured values can be retained in the display with the
>Hold< pushbutton
+100°C to +400°C:
±0,5% from measured
value, ±1 digit
7. Operating instructions
7.2.3 Auto-Off-Function
Sensor connection
I/O button
The Auto-Off-Function switches the unit off after 10 minutes ope-
rating time thus avoiding unintentional discharge of the battery.
HOLD-button
7.2.4 Changing measuring range
The display can be switched between °C and °F.
While switching the unit on with the >I/O pushbutton< press
>HOLD-pushbutton< and hold it.
After the self test is finished, the currently selected max. measu-
ring value will blink.
Safety loop for
use on Zone 0
reverse side:
safety screw
°C
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Pressing the >Hold-pushbutton< switches between °C and °F.
Should no pushbutton be pressed for 5 seconds after a changeo-
ver, then the new measuring value will be accepted.
Surface probe
0628 1932:
measurement range:-50 ... 400°C
accuracy:
Ex-Zones:
class B
2, 1
7.2.5 Switching-off
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 3,2mm (ø)
response time (99%):40 Sec.
Switch the unit of with the >I/O pushbutton< . The display is no
longer active.
7.3 Battery change
Stainless-steel probe
0628 2232:
Should the <BAT> symbol be displayed constantly, then the bat-
tery will need to be changed within the next 1-2 hours. The unit
switches itself automatically off should the battery voltage be too
low.
Open the back of the unit by unscrewing it, remove the exhausted
battery and insert a new one (observe polarity).
measurement range:-50 ... 400°C
accuracy:
Ex-Zones:
class A
2, 1, 0
probe dimensions: 125mm x 4mm (w x ø)
sensor dimensions: 15 x 3mm (w x ø)
response time (99%):10 Sec
- while changing the battery, the cover may not be separated from
t˝˝the unit top shell.
- only batteries of Type 6LR61 as per IEC may be used. The use of
alalternative types of batteries is strictly forbidden.
- batteries may only be changed outside the Ex-area.
- the taking of additional batteries into the Ex-area is not allowed.
7.4.2 Special probes
Immersion / insertion probe
0600 9999
0628 1232:
measurement range:-50 ... 400°C
accuracy:
Ex-Zones:
class A
2, 1
7.4 Temperature probes
7.4.1 Standard probes
Immersion / insertion probe
probe dimensions: >50mm x >4mm (w x ø)
sensor dimensions: >30mm x >3,2mm (w x ø)
response time (99%):12 Sec.
Surface probe
0628 1232:
measurement range:-50 ... 400°C
0600 9999
0628 1932:
measurement range:-50 ... 400°C
accuracy:
Ex-Zones:
class A
2, 1
accuracy:
Ex-Zones:
class B
2, 1
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 30mm x 3,2mm (w x ø)
response time (99%): 12 Sec.
probe dimensions: >50 mm x >4mm (w x ø)
sensor dimensions: >9 mm (ø)
response time (99%):40 Sec.
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Stainless-steel insertion probe
10. Guarantee & liability
0600 9999
0628 2232:
measurement range:-50 ... 400°C
For this product, ecom Instruments GmbH guarantees the function
and material for a period of two years under normal operating and
maintenance conditions.
accuracy:
Ex-Zones:
class A
2, 1, 0
probe dimensions: >50mm x >4mm (w x ø)
sensor dimensions: >15 x >3mm (w x ø)
response time (99%):10 Sec.
The guarantee does not apply to products which are improperly
used, modified, neglected, damaged in accidents or exposed to
abnormal operating conditions.
7.4.3 Calibration instructions
Claims under the guarantee can be made by returning the defecti-
ve equipment to the factory. We reserve the right to repair, renew
the settings or exchange the device.
The plastic handle withstands a temperature of approx. 200°C for
a short time. A long-term maximum of 90°C is recommended.
Please take this into account when calibrating the system or indi-
vidual components.
The above-mentioned guarantee conditions are the sole and only
right of the purchaser to compensation, are exclusively valid and
replace all other contract or legal warranty obligations. ecom
Instruments GmbH accepts no responsibility for special, direct,
indirect, accompanying or consequential damage as well as losses
including the loss of data which may arise through the use or
acquisition of the equipment independent of whether it was cau-
sed by violation of the warranty obligation, lawful or unlawful
action, action in good faith or any other action.
8. Repairs
Should repairs be necessary, then the conditions of ELEX V must
be complied with. We recommend that repairs be carried out in
the manufacturer’s factory as it is necessary for the unit to be
checked for technical and safety reasons.
If in certain countries the limitation of a legal guarantee as well as
the exclusion or limitation of accompanying or consequential
damage is not permissible, it may be that the above-mentioned
limitations and exclusions are not valid for every purchaser. Should
any such clauses of these guarantee terms be declared null and
void or not realisable by a competent court, then the effectiveness
or enforceability of any of the other conditions of these guarantee
terms will be unaffected by the court decision.
9. Cleaning and maintenance
The unit should only be cleaned with a moist cloth or sponge.
Detergents or abrasive materials should not be used.
We recommend that the function and accuracy of the unit be
checked every two years by the manufacturer.
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11. Declaration of EC-Conformity
12. EG type approval
TÜV CERT
We ecom Instruments GmbH, Industriestraße 2
D-97959 Assamstadt
(1)
(2)
EC – Type approval test certificate
Equipment and protective systems for use according to certain regulations in
explosion-endangered areas – Guideline 94/9/EC
declare under our sole responsibility that the product
Ex-Pt 720
(3)
EG Type approval test certificate number
TÜV 01 ATEX 1757 X
to which this declaration relates is in accordance with the provi-
sion of the following directives
(4)
(5)
(6)
(7)
Equipment:
Manufacturer:
Address:
Explosion-protected temperature measuring unit Type Ex-Pt 720*
ecom instruments GmbH
94/9/EC
Equipment and protective systems in
explosionendangered areas
D-97959 Assamstadt, Industriestrasse 2
89/336/EEC
Electromagnetic compatibility
The type of design as well as the various permissible versions are specified in the appen
dix to this type approval test certificate.
and is in conformity with the following standards or other normati-
ve documents
(8)
The TÜV Hannover/Sachsen-Anhalt e.V., TÜV CERT-certification authority, hereby con
firms, as recognized authority no. 0032 according to Article 9 of the Guidelines of the
Council of the European Union dated March 23rd, 1994 (94/9/EG), the fulfilment of the
fundamental safety and health requirements for the conception and design of equipment
and protective systems according to certain regulations in explosion-endangered areas in
line with Appendix ll of the guidelines.
EN 50014:1997
EN 50020:1994
Electrical equipment for explosion-
endangered areas
Electrical equipment for explosion-
endangered areas
The test results are recorded in the confidential test report No. 01 YEX 137383.
(9)
The fundamental safety and health requirements are fulfilled on account of compatibility with
Intrinsic safety "i"
EN 50014:1997
EN 50020:1994
EN 61326-1:1997 Electromagnetic compatibility (small business).
The equipment was tested for electromagnetic
compatibility in the frequency range of
(10)
(11)
Should the letter "X” appear at the end of the certification number, attention is drawn to
special conditions for the safe use of the equipment which can be found in the appendix.
This EG type approval test certificate only refers to the conception and testing of certain
equipment in line with Guideline 94/9/EG. The additional requirements of this guideline
which are valid for the manufacture and commissioning of this equipment are not covered
by this certificate.
60-1000 mHz. The specified tolerances could
not be complied with in the frequency band
280-300 mHz.
(12)
The designation of the equipment must contain the following details:
ecom instruments GmbH
Assamstadt, 28.05.02
ll 2 (1) G EEx ia llC T4
TÜV Hannover/Sachsen-Anhalt e.V
TÜV CERT-certification authority
Am TÜV 1
Hannover, 19.02.2002
D-30519 Hannover
The person in charge
This EG type approval test certification may only be distributed in unchanged form.
Extracts or changes need the approval of the TÜV Hannover/Sachsen-Anhalt e.V
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(13)
Appendix
1st Supplement
to
(14)
(15)
EC – Type approval test certificate No. TÜV 01 ATEX 1757 X
Description of the equipment
EC – Type approval test certificate No. TÜV 01 ATEX 1757
The company:
ecom instruments GmbH
Industriestrasse 2
The explosion-protected temperature measurement unit Type Ex-Pt 720* may be used in
explosion-endangered areas which require category 2 or 3 respectively. The sensors
which are specially mentioned in the operating instructions may be used for the measure
ment of temperatures in category 1.
D-97959 Assamstadt
In the future, the explosion-protected temperature measuring instrument Type Ex-Pt 720*
may be manufactured in accordance with the documentation listed in the test report. The
changes are concerned with the external design and the use of further sensors.
The permissible ambient temperature is dependent on the type as shown in the following
table:
The permissible ambient temperature range is 0°C to +50°C.
Electrical data
Type
Ex-Pt 720 L
Ex-Pt 720
Permissible ambient temperature range
0°C to +50°C
Power supply
(internal battery)
one block battery as per IEC 6LR61 or 6F22
U = 9V
-10°C to +50°C
Only batteries which have satisfied the type–testing in accordance with section 10.9 of
EN 50020:1994 are allowed to be used. The manufacturers and their type numbers are
listed in the operating instructions.
The electrical data are valid without change for this supplement.
Test documentation is listed in test report No. 02 YEX 164755.
Special conditions
(16)
(17)
(16)
(17)
Test documentation is listed in test report No. YEX 137383.
Special conditions
The temperature measuring unit Type Ex-Pt 720* may not be opened within the explosion-
endangered area. The version with the type designation EX-Pt 720L may only be used
within explosion-endangered areas when it is enclose in the leather case which is supp
lied with it.
The temperature measuring unit Type Ex-Pt 720* may not be opened within the explosion-
endangered area.
The version with the type designation EX-Pt 720L may only be used within explosion-
endangered areas when it is enclose in the leather case which is supplied with it.
In addition, the following applies to the measurement of temperatures within explosion-
endangered areas which need category 1 equipment:
In addition, the following applies to the measurement of temperatures within
category 1:
The temperature measuring unit Type Ex-Pt 720* itself may not be taken into areas which
require category 1 equipment. Only the sensors listed in the operating instructions as
being suitable for category 1 may be used.
The carrying strap of the unit is to be attached to a loop on the user’s belt in such a way
that when the unit hangs freely on the strap it always maintains a spacing of > 50 cm from
the boundary of the area which requires category 1. Only the manufacturer’s carrying
strap may be used.
The temperature measuring unit Type Ex-Pt 720* itself may not be taken into areas which
require category 1 operating equipment. Only the sensors listed in the operating instruc
tions as being suitable for category 1 may be used.
The carrying strap of the unit is to be attached to a loop on the user’s belt in such a way
that when the unit hangs freely on the strap it always maintains a spacing of > 50 cm from
the boundary of the area which requires category 1. Only the manufacturer’s carrying
strap may be used.
(18)
Fundamental safety and health requirements
No additional ones.
(18)
Fundamental safety and health requirements
No additional ones.
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