Ecom Instruments Ex-Pt 720 User manual

Operating Instructions
Ex-PT 720

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Content
1. Application.................................................................................................. 16
2. Safety references..................................................................................... 16
3. Malfunctioning and inadmissible operation..................................... 16
4. Safety regulations .................................................................................... 17
4.1 Special conditions for use in Zone 0......................................... 18
5. Ex-Data........................................................................................................ 18
6. Technical Details ...................................................................................... 19
7. Operating instructions ............................................................................ 20
7.1 Commissioning .................................................................................. 20
7.2 Switching-on and measuring........................................................ 21
7.2.1 Switching-on................................................................................... 21
7.2.2 Hold-Function................................................................................. 21
7.2.3 Auto-Off-Function.......................................................................... 21
7.2.4 Changing measuring range ....................................................... 21
7.2.5 Switching-off................................................................................... 21
7.3 Battery change .................................................................................. 22
7.4 Temperature probes......................................................................... 22
7.4.1 Standard probes............................................................................ 22
7.4.2 Special probes............................................................................... 23
7.4.3 Calibration instructions................................................................ 24
8. Repair........................................................................................................... 24
9. Cleaning maintenance and storage................................................... 24
10. Disposal....................................................................................................... 25
11. Guarantee & liability ................................................................................ 26

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1. Application
The Ex-Pt 720 is a precise, robust and simple to operate temperature
measuring device for temperature measurements in explosion-
endangered areas of Zones 2 and 1 in accordance with Directive
1999/92/EC (ATEX) and Zone 2, 1 and 0 according to NEC
(FM-Marking).
2. Safety references
These safety instructions contain information and safety regulations that
must be followed to ensure safe and reliable operation of the unit under
the described conditions. Failure to follow the information and instructions
can have dangerous consequences or may contravene applicable regula-
tions.
Please take the time to carefully read through the operating manual and
safety instructions before you start using the unit!
In case of any doubt (in the form of translation or printing errors) the
German language operating instructions shall apply.
3. Malfunctioning and inadmissible operation
As soon as one suspects that the safety of the equipment is endangered,
it must be taken out of service and immediately removed from the Ex-area.
Precautions must be taken to prevent its unintentional reuse.
We recommend that the unit be returned to the manufacturer for checking.
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.
- obviously incorrect measurements occur.
- measurements with the unit are no longer possible.
- the permissible limiting values were exceed.

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4. Safety regulations
Use of this unit assumes that the operator observes conventional safety
regulations and has read the certificate in order to eliminate faulty operati-
on of the unit.
The following additional safety regulations must also be observed:
- The unit may not be opened in Ex-areas.
- 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.
- 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.
Overheating will damage the sensors.
- Excessively heated sensors should not be taken into the Ex-area.
- Avoid use in aggressive acids or bases.
- Only operate the sensors in explosive vapour, mist, or gas/air mixtures
under atmospheric conditions; temperature: -10…+50°C, pressure:
0.8…1.1 bar
- In the absence of explosive mixtures or if additional measures are imple-
mented in accordance with EN 1127-1, the sensors may also be opera-
ted outside the atmospheric conditions according to the manufacturer‘s
specifications.
- When using the sensors ensure that mechanical damage and friction are
excluded in their application; in particular pay attention to flow conditions
and vessel installations.
- If necessary, appropriate precautions are to be taken to prevent static
charges.
- When using a grounding connection observe the specifications of
EN 60079-14.
- The sensors are to be grounded before being taken into the Ex-area.

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4.1 Special conditions for use in Zone 0
The measurement of temperatures with the Ex-Pt 720 within
Zone 0 is only permitted if the following conditions are complied with:
- A stainless-steel sensor Type 0628 2232 or 0628 2432 is used.
- The sensors are to be grounded via the ground wire. When doing this
make sure there is a secure ground connection. The grounding terminal
is to be attached in such a way that it cannot be detached accidentally.
The ground connection must be established outside Zone 0 and before
taking the sensor into Zone 0. For more information with regard to appro-
priate grounding, please refer to, e.g. BG regulation BGR 132
(BG = Employer‘s Liability Insurance Association).
- The Ex-Pt 720 itself may not be taken into Zone 0.
- It must be absolutely ensured that the unit does not find its way
accidentally into Zone 0. In order to guarantee this, the carrying
strap of the unit must be attached additionally to the belt of the user
or to a loop attached to his belt. The length of the carrying strap
must be so adjusted that when the unit hangs freely on the carrying
strap, the Ex-Pt 720 maintains a spacing of 50cm to the bboundary
area of Zone 0.
- Should the unit be used in the optionally available leather case, the
carrying strap of the unit must still comply with the conditions for
attachment to the user’s body.
5. Ex-Data
EC-test approval-no.: TÜV 01 ATEX 1757 X
Ex-designation: II 2(1) G Ex ia IIC T4
Approved for Zone 1, equipment group II, gas group IIC explosions-endan-
gered gases, vapours or fog, temperature class T4.
Only the sensors specified in the approval certificate may be used. Sensor
no. 0628 2232 and 0628 2432 may be used in Zone 0 !
Report Job Identification No: 3015067
FM Marking: I.S. Class I Div.1 A - D T4
Class I Zone 0 AEx ia IIC T4
Intrinsically safe for Class I, Division 1, Groups A, B, C, and D hazardous
(classified) locations temperature class T4 at a 50°C ambient and intrinsically

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safe for Class I Zone 0 Group IIC hazardous (classfied) locations temperature
class T4 at a 50°C ambient.
6. Technical Details
Ambient temperature Ta: -10 ... +50°C
Storage temperature: -20 ... +70°C
Batteries: 9V-Block, 6LR61 as per IEC
(only type tested batteries)
Table with type-tested batteries:
Type Manufacturer
6 LR 61 Alkaline No.4822 Varta
6 LR 61 Alkaline Universal No. 4022 Varta
6 LR 61 Alkaline Elektric Power No. 8022 Varta
6 LR 61 Alkaline Duracell
6 LR 61 Alkaline Ultra Duracell
6 LR 61 Alkaline Batterie Procell Duracell
6 LR 61 Alkaline Power Line Industrial Battery Panasonic
6 LR 61 Alkaline Energizer Ralston Energy
6 LR 61 Alkaline Daimon
Operating life: approx. 100h
Dimensions: 190 x 57 x 42 mm
Weight: approx. 200g (with batteries)
Case material: ABS
IP-protective rating: IP 54
EC-designation:
0 0102
Display: LCD, digit height 14mm
Measuring device: Pt 100-Sensor, 4-wire-technique
Measuring range:
The measuring range of the sensors within explosive zones depends on
the temperature class of the Ex-area and it is distinguished as follows:
T1: -10 … 360°C
T2: -10 … 210°C
T3: -10 … 110°C
T4: -10 … 50°C

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Please also note the maximum working temperature of the unit
Ta: -10 ... +50°C:
Accuracy: -50°C to +199,9°C: ±0,2°C, ±1 digit
+200°C to +400°C: ±0,2% from measured
value, ±1 digit
Resolution: -50°C to +199,9°C: 0,1°C
+200°C to +400°C: 1°C
System accuracy: -50°C to +99,9°C: ±0,6°C, ±1 digit
(with immersion/insertion sensor) +100°C to +400°C: ±0,5% from measured
value, ±1 digit
Sensor connection
I/O button
reverse side:
safety screw
HOLD-button
Safety loop for
use on Zone 0
7. Operating instructions
7.1 Commissioning
- carefully read operating instructions.
- open back of unit with key.
- insert battery correctly (observe polarity).
- insert battery safety cover.
- close unit with safety screw.

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7.2 Switching-on and measuring
7.2.1 Switching-on
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.
7.2.2 Hold-Function
The measured values can be retained in the display with the >Hold
pushbutton<
7.2.3 Auto-Off-Function
The Auto-Off-Function switches the unit off after 10 minutes operating time
thus avoiding unintentional discharge of the battery.
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-push-
button< and hold it.
After the self test is finished, the currently selected max. measuring value
will blink.
Pressing the >Hold-pushbutton< switches between °C and °F.
Should no pushbutton be pressed for 5 seconds after a changeover, then
the new measuring value will be accepted.
7.2.5 Switching-off
Switch the unit of with the >I/O pushbutton< . The display is no longer active.
°C

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7.3 Battery change
Should the <BAT> symbol be displayed constantly, then the battery 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).
- while changing the battery, the cover may not be separated from the unit
top shell.
- Only use approved battery types.
- Make sure that the polarity of the inserted batteries is correct.
- Please ensure that all used batteries are properly disposed of in an
environmentally friendly manner.
- batteries may only be changed outside the Ex-area.
- the taking of additional batteries into the Ex-area is not allowed.
7.4 Temperature probes
7.4.1 Standard probes
Immersion / insertion probe
0628 1232: accuracy: class A
Ex-Zones: 2, 1
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 30mm x 3,2mm (w x ø)
response time (99%): 12 Sec.
Surface probe
0628 1932: accuracy: class B
Ex-Zones: 2, 1
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 3,2mm (ø)
response time (99%): 40 Sec.

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Stainless-steel probe
0628 2232: accuracy: class A
Ex-Zones: 2, 1, 0
probe dimensions: 125mm x 4mm (w x ø)
sensor dimensions: 15 x 3mm (w x ø)
response time (99%): 10 Sec
Drone Tankprobe
0628 2432: accuracy: class A
Ex-Zones: 2, 1, 0
probe dimensions: 235mm x 25mm (w x ø)
wight: 400g (without cable)
response time (99%): 10 Sec
cable: 25 m
7.4.2 Special probes
Immersion / insertion probe
0600 9999
0628 1232: accuracy: class A
Ex-Zones: 2, 1
probe dimensions: >50mm x >4mm (w x ø)
sensor dimensions: >30mm x >3,2mm (w x ø)
response time (99%): 12 Sec.
Surface probe
0600 9999
0628 1932: accuracy: class B
Ex-Zones: 2, 1
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
0600 9999
0628 2232: accuracy: class A
Ex-Zones: 2, 1, 0
probe dimensions: >50mm x >4mm (w x ø)
sensor dimensions: >15 x >3mm (w x ø)
response time (99%): 10 Sec.
Drone Tankprobe
0600 9999
0628 2432: accuracy: class A
Ex-Zones: 2, 1, 0
probe dimensions: 235mm x 25mm (w x ø)
wight: 400g (without cable)
response time (99%): 10 Sec
cable: 1 ... 50 m
7.4.3 Calibration instructions
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 individual
components.
8. Repair
Repairs are to be conducted by ecom instruments GmbH or by personnel
or service centres authorised by ecom instruments GmbH, because the
safety of the unit needs to be tested after repairs are implemented.
9. Cleaning maintenance and storage
- Only use a suitable cloth or sponge to clean the unit. Do not use any sol-
vents or abrasive cleaning agents when cleaning.
- It is recommended that you have the functionality and accuracy of the
unit inspected by the manufacturer every two years.
- The batteries should be removed from the unit during prolonged periods
of storage.
- Do not allow storage temperatures to exceed or fall below the permitted
range of -20°C to +70°C.

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10. Disposal
Old electrical equipment and „historic“ old electrical equipment from ecom
instruments GmbH will be disposal obligation and disposed of at no cost in
accordance with the EC Directive 2002/96/EC and the German Electrical and
Electronic Equipment law of 16/03/2005. The costs of the transport of the
equipment to ecom instruments GmbH are borne by the sender.
In accordance with “Directive 2006/66/EC on batteries and accumulators
and waste batteries” we are obligated to provide you with the following
information:
Your device contains an alkaline battery.
Depleted batteries should never be disposed of along with normal or
household waste. Old batteries can contain harmful substances that are
hazardous to health and damaging to the environment. Please return the
batteries. Return is free of charge and required by law. Please only dispose
of discharged batteries in the designated containers.
Note: The battery used in this unit poses a fire hazard and can cause
chemical injuries if it is used improperly. Neither the battery nor the battery
cells should be opened or disassembled and they should not be burned or
exposed to temperatures exceeding 100°C.
If the battery needs to be disposed of, it can be removed as described un-
der point (9). The disposal regulations specified above are also applicable
for old devices.
All batteries can be recycled. Precious raw materials such as iron, zinc and
nickel can therefore be reused.
The symbol has the following meaning: Batteries and rechargeable batte-
ries should not be disposed of along with normal or household waste.

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11. Guarantee & liability
Under the general terms and conditions of business, ecom instruments
GmbH offers a 2-year warranty for function and materials on this product
under the specified operating and maintenance conditions. Not covered are
all wearing parts (such as batteries and lamps).
This warranty does not extend to products that have been used improperly,
altered, neglected, damaged by accident or subjected to abnormal opera-
ting conditions or improper handling.
In the event of a warranty claim, the faulty device should be sent in. We
reserve the right to readjust, repair or replace the unit.
The above warranty terms represent the sole rights of the purchaser to
compensation and apply exclusively and in place of all other contractual
or statutory warranty obligations. ecom instruments GmbH does not accept
liability for specific, direct, indirect, incidental or consequential damages or
losses, including the loss of data, regardless of whether they are caused by
breach of warranty, lawful or unlawful actions, actions in good faith or other
actions.
If in certain countries the restriction of statutory warranty and the exclusi-
on or restriction of incidental or consequential damages is unlawful, then
it may be possible that the above restrictions and exclusions do not apply
for all purchasers. If any clause in these warranty terms should be found to
be invalid or unenforceable by a competent court, then such a judgement
shall not affect the validity or enforceability of any other clause contained in
these warranty terms.

PA000148 / Druckauflage / 03/2013
WEEE-Reg.-Nr. DE 934 99306
2800AL01A03 03/2013 Änderungen vorbehalten! Subject to change without notice!
ecom instruments GmbH • Industriestraße 2 • 97959 Assamstadt • Germany
Tel.: [phone] / 42 24-0 • Fax: [phone] • E-Mail: [email protected] • www.ecom-ex.com
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