Ametek mocon Dansensor ISM-3 User manual

P/N 200114-I
09/2021
User Manual
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printing of the document!

Dansensor®ISM-3 EN User Manual
P/N 200114-I
09/2021
User Manual
Published by: MOCON Europe A/S
Rønnedevej 18
4100 Ringsted, Denmark
Tel [phone]
[e-mail]
www.ametekmocon.com
&/

2 User Manual EN Dansensor®ISM-3
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09/2021

Dansensor®ISM-3 EN User Manual 3
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09/2021
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
General use of buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Start and stop of measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
External/manual start and stop of measuring . . . . . . . . . . . . . . . . . . 12
Set-up of alarm limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Indication of sensor flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Flow alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Current output/voltage output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Sub menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting up of options, relay and external measurement control .16
5. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
6. Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Offset adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. Error indication/error correction . . . . . . . . . . . . . . . . . . . . . . . .21
8. Spare parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Standard accessories (included) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Accessories (extra) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Flow system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Operation and connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4 User Manual EN Dansensor®ISM-3
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Dansensor®ISM-3 EN User Manual 5
P/N 200114-I
09/2021
1. Introduction
Dansensor® ISM-3 is an oxygen analyser which measures the concentration of oxygen (O2) in
a gas mixture.
The measured O2concentration is shown in a large, easy readable display.
ISM-3 can via a simple menu structure be programmed to give alarm in case of a too high or
too low O2concentration. Besides that an alarm is given in case of insufficient flow of
measuring gas, or in case of other faults in the ISM-3.
ISM-3 is equipped with a relay for alarm in case of too high/low O2concentration, insufficient
measuring gas flow or other vital faults.40
ISM-3 is specially developed for being incorporated/mounted on nitrogen generators etc.
where the control of the O2concentration is a vital part of the process.
Fig. 1. ISM-3 Analyser for incorporation
Fig. 2. ISM-3 Analyser designed for retrofitting

6 User Manual EN Dansensor®ISM-3
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The following makes ISM-3 a unique O2analyser:
Precise and quick measuring
Covers all measuring ranges from 100% to 0ppm with automatic range shift
Optional external control of measuring
Long term stable sensor - long intervals without calibration
Automatic control of measuring gas flow
Programmable current oulet/voltage outlet (extra accessories) 0/4-20mA/0/2-10 Volt with
galvanic separation
2 alarm limits programmable for O2content
Calibration with up to 4 calibration gases plus atmospheric air (20.946% O2)
Supplied as stand-alone or for incorporation.
ISM-3 is specifically built for measuring on clean dry gases and gas mixtures where a great
measuring precision, reliability and long term stability and alarm control of flow and content
of oxygen are required.
As examples of application the following areas can be mentioned:
Control of gas
Atmospheric control under industrial or laboratory conditions
Control of gas mixtures
Environmental measurements
Measuring of oxygen within the chemical, metallurgical and medical industry and
research

Dansensor®ISM-3 EN User Manual 7
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2. Safety precautions
Read and understand this manual for your own safety’s sake and for the quality of the work
carried out using this equipment.
The following terms are used:
"DANGER" to designate a condition which MAY involve mortal danger of serious
injury
"CAUTION" to designate a condition which MAY involve serious injury
"NOTE" to designate a condition which MAY involve faulty operation of the
equipment thus causing fault measuring results
Follow the below instructions carefully:
DANGER: Opening ISM-3 may involve mortal danger or serious injury as live
high-voltage leads may be exposed. By opening the ISM-3, the
mains supply must always be switched off. By connecting the net
ground must always be connected.
CAUTION: If ISM-3 is moved or transported, make sure it is note exposed to
shocks or impact.
Only use water or a mild soap lather to clean the front panel.
Always make sure that there is at least 5 cm of free air behind the
ventilation holes on the back of ISM-3.
Our warranty does not cover unless the above instruction is strictly
adhered to.
NOTE: Always install a hose on the "GAS OUT" connection and make sure
that the measuring gas is transported away from the ISM-3, as the
surrounding atmospheric air is used as reference. In order to observe
the CE`s EMC regulation all connections to the ISM-3 (not mains
connections) must be protected. The screen must end in a PG sleeve
on the back of ISM-3.
Recommendations
In order to prolong the life of the analyser it is recommended to let ISM-3 be constantly
connected to the mains voltage.
Every 6 months it is recommended to control ISM-3`s calibrations by measuring on gases
with known content of O2.
Recommended control - and calibration interval is 12 months.

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Dansensor®ISM-3 EN User Manual 9
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3. Connection
ST1: Gas alarm and system alarm output. Relay connection. Max. 48V, 1A
pin 1: Common terminal (COMMON)
pin 2: Contact set with switch on function (normally connected) (N.C.)
pin 3: Contact set with switch on functions (normally open) (N.O.)
pin 4: Not connected
ST2: Connection to current output/voltage output
pin 1: +0/4 to 20mA (0/2-10Volt)
pin 2: -/GND
ST3: Connection for measuring control signal
pin 1: +10 to 32VDC
pin 2: -/GND
Fuse 0.63 AT (1.6 AT at 115V AC). Placed inside.
Fan
GAS OUT
GAS IN (For ISM-3 without a build-in pump, 2 - 10 bar is labelled upon request)
Cable inlet for mains connection
Cable inlet for display cable (only for model for incorporation)
Cable inlet for signal cable. The cable is internally connected to ST1, ST2 and ST3.
Current output/voltage output. Yellow (+)/Green (-)
Alarm relay output. Switch is open in case of an alarm. Grey/Pink
Measuring control input signal (10 to 32 VDC). Brown (+)/White (-)
RS232C serial communication port (for internal use only)

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Dansensor®ISM-3 EN User Manual 11
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4. Operation
ISM-3 is equipped with four keys and a large LED display for indication of the O2
concentration.
Fig. 3. ISM-3 operation panel
Start up
ISM-3 starts up with a self-test lasting about 10 seconds. After the self-test the heating which
takes 10 minutes begins. If ISM-3 only has been switched off shortly the heating time is
reduced. Minimum heating time is 2 minutes.
The rest of the heating time in minutes is indicated in the display as H 10 (H for heating). When
the time is counted down to zero the ISM-3 is ready. After 10 minutes ISM-3 has a read-out
difference of max 3% of the read value. I takes the total heating time of 20 minutes until the
ead-out difference is below the specified 1% for the shown value.
If the measuring had been activated when the ISM-3 was switched off, the measuring is
automatically started when ISM-3 is turned on. If an external measuring control has been
chosen, the measuring will start when the measuring control signal is set to ON.

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General use of buttons
The functions of the single buttons are only activated when you release the button. When a
parameter is displayed, first the parameter name appears, for example FLO for flow AL.HI for
high oxygen alarm etc. for about 1 second. Then the actual value is displayed.
With the button it is easy to scroll between FLO, AL.HI. and AL.LD and return to the output of
the actual O2(20.9)
No matter which parameter is currently displayed, the device automatically returns to display
the actual O2when there has been no activation of any button for about 5 seconds (the
sensor flow can be read constantly. See "Indication of sensor flow" on page 13.
Start and stop of measuring
In the set-up menu it is selected whether the measuring is controlled via the button, via
external pump control signal, button as well as external control signal or if the measuring is
always activated. If only an external control of measuring has been chosen or the measuring is
always activated, the button is inactive. If either of the two other set-up possibilities has
been chosen, the measuring can be started and stopped using the button .
1. Press and the measuring starts. As soon as the measuring has started, the measured O2
concentration is read out on the display.
2. Press again and the measuring stops and the displays turns off (only % will be lit).
External/manual start and stop of measuring
If an external and manual control of measuring has been chosen in the set-up menu, the
measuring will start when the external measuring control signal is set to ON and stop when
the signal is set to OFF. It is only when the external control signal is changing condition that
the measuring starts/stops. Every time the key is pressed the conditions change, meaning
that if the measuring has been started by the external control signal the measuring stops
when is activated. Now measuring can only be started by the external signal if signal is set
to OFF and the ON again.
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$O+L

Dansensor®ISM-3 EN User Manual 13
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Set-up of alarm limits
ISM-3 has two programmable alarm limits, AL.HI (high oxygen alarm) and AL.Lo (low oxygen
alarm).
In case of measurements above or below the alarm limits the relay is activated.
In order to change one of the alarm limits, the following procedure must be followed:
1. Press 2 or 3 times depending on whether it is a high alarm or a low alarm which must be
changed.
2. The alarm value is displayed. Press and hold the button for 3 seconds in order to change
the alarm.
3. With and it is possible to switch between % and ppm.
After choosing % or ppm press and the first digit will flash.
4. Use and to set the flashing digit.
5. Press in order to set the next digit.
6. When the last digit has been set, press the button to store the value.
The set alarm limit is active immediately.
Indication of sensor flow
1. Press and FLO. will appear in the display followed by an indication of the sensor flow in
ml/min.
2. If you wish to continuously display the flow, press and hold the button for 3 sec. while
the flow is displayed. After about 3 seconds the display will flash shortly.
3. The gas flow value will be displayed until the button is activated again.
Flow alarm
A flow alarm appears if the indicated flow is below or above the min. and max. values as set in
the set-up menu. In case of a flow alarm, display will change in 2 secs. turns between FL.ER
and O2value until the flow error stops. The relay is activated for min. 4 seconds independently
of the duration of the alarm.
The flow alarm has a higher priority than the oxygen alarms. If a flow alarm and an oxygen
alarm occurs at the same time, only the flow alarm appears in the display.
Current output/voltage output
ISM-3 is equipped with a current output.
The current output is configured in the set-up (SET.) menu by means of the CU.0,CU.4 and
CU.20 parameters and can be set to the ranges 0-20mA or 4-20mA/0-10V or 2-10V
respectively.
The output is configured as a current output from the factory, but it can be converted to a
voltage output by mounting the supplied resistor between the output terminals (see the
instruction that comes with the resistor).

14 User Manual EN Dansensor®ISM-3
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Sub menus
ISM-3 is equipped with 3 sub menus as shown in Fig. 4.
Fig. 4. ISM-3 sub menus
Press and hold and simultaneously for 3 seconds (ISM-3 must not be in a sub
menu).
Now you have access to the 3 sub menus:
Set-up menu (SET.)
Diagnostic menu (DIA.)
Calibration menu (CAL.)
No matter which menu you are in, the device will return to display the actual O2when no
key has been activated for about 20 seconds.
The parameters in the diagnostic menu can be set to permanent readout.
Use to display the next sub menu.
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Dansensor®ISM-3 EN User Manual 15
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The setup menu SET.
1. Press when SET. appears on the display.
2. Use and to set required value.
3. Press and hold for 3 seconds to change the value. (for typing in values, see "Set-up of
alarm limits" on page 13).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
•FLO.L 100 Flow alarm limit. Alarm limit for min. flow in ml/min.
•FLO.H 150 Flow alarm limit. Alarm limit for max. flow in ml/min.
•DEL. 3 Gas flushing time in seconds before activation of alarms.
Valid area 0 to 250.
•CU.0 - - - - O2value which must correspond to 0mA (0 V)
•CU.4 0% O2value which must correspond to 4mA (2 V)
•CU.20 10% O2value which must correspond to 20mA/10V
•PA. 1001 Setting up of options, relay function and external measurement
control.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
When typing in values for FLO.L and FLO.H, error ER.1 appears, if FLO.L is set to a higher value
than FLO.H.
Only one of the parameters CU.0 and CU.4 can be set, the other one is displayed as “- - - -”.
If identical values are entered for the 0 and 20mA or the 4 and 20 mA values, error code er. 1
will be displayed.
Diagnostic menu DIA.
1. Press when DIA. appears in the display.
2. Use and to set required value. For a permanent readout of the chosen value press
and hold for about 3 seconds. The value wil now be displayed until you press , or
again.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
•EMF. 165.0 Present sensor EMF in mV.
•TPT.1 33 Present internal ISM-3 temperature in °C.
•TPT.2 0 Present difference in heater temperature in °C. Difference between
present temperature and ideal temperature.
•OFFS -0.12 Sensor offset. Result of latest off set adjustment in mV.
•TI.PO 1234 Hour counter in number of 10 hours. Number of hours in which ISM-3
has been switched on.
•TI.CA 678 Hour counter in numbers of 10 hours. Number of hours since the last
calibration of ISM-3.
•TI.FL 983 Hour counter in number of 10 hours. Number of hours in which the
flow has passed through the sensor (flow >30ml/min).
•PRG. 1.0 Installed program version.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Calibration menu CAL.
See the chapter about calibration.

16 User Manual EN Dansensor®ISM-3
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Setting up of options, relay and external measurement
control
In the set-up menu the PA. parameter is defined as follows:
The first digit (from the left) determines from where and how the measurement can be
started and stopped.
The second digit must be 0 and is reserved for future use.
The third digit determines how the relay works.
The last digit indicates if there has been installed options as current output/ voltage output.
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Dansensor®ISM-3 EN User Manual 17
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5. Maintenance
ISM-3 requires for a minimum of maintenance and as the oxygen-sensor itself is very long
term stable, no calibration of the analyser in a normal application situation is needed
between the obligatory 12 months service control intervals.
See "Recommendations" on page 7 for details.
If ISM-3 is installed in places with more dust than normal, it may be necessary to change the
cooling air filter between the obligatory 12 months service control intervals.
When cleaning the front panel, use only water or a mild soap lather.

18 User Manual EN Dansensor®ISM-3
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