Hach ORBISPHERE 31 series Quick manual
DOC024.98.93017
ORBISPHERE Model 31xxx
Thermal Conductivity Sensors
05/2015, Edition 4
Basic User Manual
Basishandbuch
Manuale di base per l'utente
Manuel d'utilisation de base
Manual básico del usuario
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English..............................................................................................................................3
Deutsch.......................................................................................................................... 14
Italiano............................................................................................................................ 26
Français......................................................................................................................... 37
Español.......................................................................................................................... 49
Čeština........................................................................................................................... 61
Magyar........................................................................................................................... 72
2
Sensor specifications
Specifications are subject to change without notice.
Sensor product line
Sensor Models:
Sample Temperature Range 0-50°C
Standby Temperature Range 0-120°C
Gas Purge gas Calibration gas Standard
(20 bar rated)
With external
temperature
adapter
High pressure
(170 bar rated)
H2
N2
pure H2
31 250 31 260 31 260 HP
Argon 31 251 31 261 N/A
CO231 252 N/A 31 262 HP
H2 / He Clean air air or pure H2 or
pure He 31 280 N/A N/A
D2 / He Clean air air or pure D2 or
pure He 31 280 N/A N/A
CO2N2pure CO231 450 31 460 N/A
N2
CO2
pure N2
31 550 31 560 31 560 HP
H231 551 31 561 31 561 HP
Argon 31 553 31 563 31 563 HP
He N/A 31 564 31 564 HP
• All ORBISPHERE thermal conductivity sensor enclosures are certified IP68
• CE certification: EN 61326:1997 /A1:1998 /A2:2001 /A3:2003; Directive 89/336/CE
Purge gas pressure regulator
Specification Details
Model 29089
Filtration grade 40 μm
Input pressure min/max 1 bar / 16 bar
Output pressure min/max 0.5 bar / 7 bar
Standard nominal flow rate 900 Liters/minute
Condensate volume 22 cm3
Temperature range (ambient and
media) -10°C to 60°C
Purge gas dew point -10°C (+14°F)
Construction materials Housing: metal; Condensate bowl: polycarbonate; Bowl guard: metal
Weight 460 g.
Size in cm (overall) 21 x 11.5 x 8
English 3
Sensor membrane specifications
In-line instrument applications (Table 1)
Sensor type
31 250 H2 and 31260 H2 (purge gas N2)
For other purge gases, please contact your Hach Lange
representative for specification.
Specification Membrane 29561A Membrane 2952A Membrane 2935A
Thickness [μm] 25 25 25
Material PFA ETFE ECTFE (Halar®)
Recommended applications Waste gas offgas,
reactor coolant Reactor coolant High H2 level
Radiation limits 105 rad 108 rad 108 rad
Measurement range at 25°C
0-2 ppm, or
0-25 cc/kg, or
0-1.5 bar
0-10 ppm, or
0-120 cc/kg, or 0-6 bar
0-20 ppm, or
0-220 cc/kg, or
0-12 bar
Accuracy (sample temperature
20-50°C within ± 5°C of calibration
temperature)
The greater of ±1% of
reading or ± 2 ppb, or
± 0.03cc/kg, or ±
1.5 mbar
The greater of ±1% of
reading or ± 8 ppb, or
± 0.1cc/kg, or ±
6 mbar
The greater of ±1% of
reading or ± 25 ppb, or
± 0.4 cc/kg, or ±
20 mbar
Accuracy (sample temperature 0-50°C
independent of calibration
temperature)
The greater of ±3% of
reading or ± 15 ppb or
± 0.18 cc/kg or ±
6 mbar
The greater of ±3% of
reading or ± 60 ppb or
± 0.6 cc/kg, or ±
20 mbar
The greater of ±3% of
reading or ± 150 ppb
or ± 2.5 cc/kg, or ±
50 mbar
Measurement cycle (seconds) 17
Sample flow rate1 (through flow
chamber) 220 mL/min 200 mL/min 100 mL/min
Linear flow rate2 (past sensor socket) N/A N/A N/A
In-line instrument applications (Table 2)
Sensor type
31 450 CO2 and
31460 CO2 (purge
gas N2)
31 550 N2 and
31560 N2 (purge
gas CO2)
31 280 H2/D2 and He (clean air
purge)
Specification Membrane 29561A Membrane 29561A Membrane
2952A
Membrane
29561A
Thickness [μm] 25 25 25 25
Material PFA PFA ETFE PFA
Recommended applications In-line beverage In-line beverage Reactor coolant Waste gas PWR
Radiation limits 105105108105
Measurement range at 25°C
0-7 V/V, or
0-15 g/kg, or
0-10 bar
0-350 ppm, or
0-300 mL/L, or
0-20 bar
0-100% H2/D2 or
0-10 bar
0-100% H2/D2 or
0-4 bar
1Minimal flow through an ORBISPHERE 32001 flow chamber
2Minimal flow past an ORBISPHERE 29501 sensor socket
4 English
Sensor type
31 450 CO2 and
31460 CO2 (purge
gas N2)
31 550 N2 and
31560 N2 (purge
gas CO2)
31 280 H2/D2 and He (clean air
purge)
Specification Membrane 29561A Membrane 29561A Membrane
2952A
Membrane
29561A
Accuracy (sample
temperature 20-50°C within
± 5°C of calibration
temperature)
The greater of ±1%
of reading or ±
0.006V/V, or ±
0.012g/kg, or ±
8 mbar
The greater of ±2%
of reading or ±
0.3 ppm, or ±
0.25mL/L, or ±
15 mbar
The greater of
±2% of reading
or ± 1% H2/D2
The greater of
±2% of reading
or ± 0.2% H2/D2
Accuracy (sample
temperature 0-50°C
independent of calibration
temperature)
The greater of ±2%
of reading or ±
0.02 V/V or ±
0.048g/kg or ±
14 mbar
The greater of ±4%
of reading or ±
1 ppm or ± 0.8 mL/L
or ± 34 mbar
N/A N/A
Measurement cycle
(seconds) 22360 60
Sample flow rate4 (through
flow chamber) 100 mL/min 300 mL/min 200 mL/min 500 mL/min
Linear flow rate5 (past
sensor socket) 50 cm/sec 150 cm/sec N/A N/A
Sensor weight and dimensions
Weight with external temperature adapter 1330g (±20g). Weight without external temperature
adapter 1040g (±20g).
Figure 1 Sensor dimensions
Note: Shown with external temperature adapter.
General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
3Measurement cycle for 3624 ProBrix application is 15 seconds
4Minimal flow through an ORBISPHERE 32001 flow chamber
5Minimal flow past an ORBISPHERE 29501 sensor socket
English 5
Safety information
N O T I C E
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,
without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent
permitted under applicable law. The user is solely responsible to identify critical application risks and install
appropriate mechanisms to protect processes during a possible equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this
equipment in any manner other than that specified in this manual.
Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special
emphasis.
Precautionary labels
Read all labels and tags attached to the product. Personal injury or damage to the product could
occur if not observed.
This symbol, when noted on a product, indicates a potential hazard which could cause serious
personal injury and/or death. The user should reference this instruction manual for operation and/or
safety information.
This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock
and/or electrocution exists and indicates that only individuals qualified to work with hazardous
voltages should open the enclosure or remove the barrier.
This symbol, when noted on the product, indicates that the marked item can be hot and should not
be touched without care.
This symbol, when noted on the product, indicates the presence of devices sensitive to electrostatic
discharge and indicates that care must be taken to prevent damage to them.
This symbol, when noted on the product, identifies the location of the connection for protective earth
(ground).
6 English
Electrical equipment marked with this symbol may not be disposed of in European public disposal
systems. In conformity with European local and national regulations, European electrical equipment
users must now return old or end-of-life equipment to the manufacturer for disposal at no charge to
the user.
Note: For return for recycling, please contact the equipment producer or supplier for instructions on how to return
end-of-life equipment, producer-supplied electrical accessories, and all auxillary items for proper disposal.
Products marked with this symbol indicates that the product contains toxic or hazardous substances
or elements. The number inside the symbol indicates the environmental protection use period in
years.
What you have received
Check that all mounting hardware is included. Note that, unless the sensor is part of ORBISPHERE
equipment that includes it, the sensor must be installed in an ORBISPHERE socket or flow chamber
that allows contact with the sample flow to be analyzed (refer to Installation on page 8 for details).
TC sensor for CO2, N2 or H2 measurement
Figure 2 Sensor components
1 Storage cap 5 Input connection from the optional in-line
temperature sensor
2 Protection cap 6 Adapter for the optional in-line temperature sensor
3 Purge gas inlet 7 Purge gas outlet
4 Output connection to instrument
The sensor head is protected by a screw-on plastic storage cap. The sensor may have an additional
in-line temperature sensor adapter (No. 6 in Figure 2) that allows you to install a temperature sensor
directly into the sample flow.
The sensor has been carefully checked and calibrated in a production environment and following our
quality control procedures. As such, there is no need for any sensor maintenance or a change of
membrane, prior to installation. An easily removed label is stuck on the protection cap to remind you
of this.
Two small identification clips (stamped with the letter “T”) will be delivered with every sensor. They
should be used to identify the connection cable between the sensor and a multi-channel analyzer.
This is important in order to avoid connecting the sensor to the wrong measurement board.
Connecting a TC sensor to an EC measurement board (and vice versa) can damage both the sensor
and the electronics.
English 7
A sensor maintenance kit
The maintenance kit includes the material needed to service and maintain the sensor.
Storage information
During a short shutdown period (such as weekends), the sensor may stay in place with the
instrument turned on, and purge gas supplied. If the inactive period is likely to last longer, remove the
sensor, wipe it dry and store it properly, using the plastic storage cap supplied.
CAUTION
We recommend you use the ORBISPHERE 32605 Purge safety backup unit to ensure that the purge gas supply
to the sensor will not get interrupted in case of a mains power outage. See Purge safety backup unit
on page 10.
Instructions for sensor storage
• If the sensor’s head shows deposits, rinse it under tap water.
• Wipe the sensor head dry.
• Put a small silica desiccant bag inside the storage cap.
• Put the storage cap in place.
• Store the sensor in a safe dry place.
• The storage place must be at a stable room temperature.
CAUTION
Pay attention to rapid temperature change situations, such as air conditioning being turned on and off daily, that
may create condensation inside the sensor’s cell and damage the electronics inside.
Installation
Pre-installation
1. 2.
1. The sensor head is protected by a screw-on black plastic storage cap. This cap should be
removed.
2. Once the storage cap has been removed, an orange sticker will be visible informing you not to
remove the protection cap. This is because the sensor has already been checked and calibrated
prior to shipping, and no sensor maintenance or membrane change is required prior to first use.
However, this label must be removed.
3. Attach the two small identification clips (stamped with the letter “T”) to each end of the sensor
cable so they are clearly visible. These clips indicate this is a TC sensor, so when connecting to a
multi-channel analyzer, care must be taken to connect it to the TC measurement board.
8 English
Sensor positioning
Unless the sensor is part of the ORBISPHERE equipment that includes it, the sensor must be
installed in an ORBISPHERE socket or flow chamber, that allows the contact with the sample fluid to
be analyzed.
The sensor and measuring instrument are connected by a cable and 10 pin connector. The standard
sensor cable length is 3 meters.
Ensure that the sensor will be mounted:
• perpendicular to the pipe
• on a horizontal pipe section (or on flow-ascending vertical pipe)
• minimum of 15 meters away from the pump's discharge side
• in a place where the sample flow is stable and rapid, and as far as possible from:
• valves
• pipe bends
• the suction side of any pumps
• a CO2 injection system or similar
Note: There may be situations where not all the above conditions can be met. If this is the case, or you have any
concerns, please consult your Hach Lange representative to appraise the situation and define the best applicable
solution.
Sensor insertion
• Insert the sensor straight into the flow chamber or socket. Do not twist the sensor.
• Hand tighten the attaching collar.
• Connect the sensor cable.
• Check for leaks; replace O-rings if product leaks are visible.
Instructions for micro volume flow chambers
Do not twist the sensor when inserting it into a micro volume flow chamber. This rotation may twist
the protection cap, thus changing the membrane position. This can modify the membrane measuring
conditions, and affect measurement precision.
Sensor removal
• Shut off the sample flow and drain the sampling circuit from liquid or gas pressure.
• Remove the sensor cables connected at the sensor side.
• Remove the purge gas connections.
• Hold the sensor body in one hand to avoid rotation, and unscrew the collar with other hand.
• Pull the sensor straight out of its socket, or flow chamber.
• Check that both O-rings remain in place inside the flow chambers.
• Install the storage cap on the sensor.
English 9
Purge gas system
Purge gas regulator
The role of the ORBISPHERE 29089 gas regulator is to deliver purge gas filtered at
40 μm. Attach the unit to a suitable bracket, using the M3 threaded holes on the back. It’s
position should be vertical ± 5%. The gas flow is indicated by an arrow on the regulator's
body.
Maintenance:
Drain the condensate periodically. Unscrew by hand the drain at the bottom of the bowl.
If filter is contaminated:
• Turn off the gas supply
• Unscrew the bowl by hand
• Unscrew the black disc at the bottom
• Remove the white composite filter
• Wash under clean tap water, blow dry, and install
Purge gas supply
Make sure there is no interruption in the purge gas supply. The use of a backup gas cylinder and an
automatic changeover valve, that activates when the first cylinder is empty, are recommended.
Use a 6 mm flexible (nylon or PVC) or rigid (stainless steel) line to connect the pressure regulator
and thermal conductivity sensor to the purge gas supply. Swagelok connectors (6 mm or 1/4") are
provided.
A short length of plastic tube is supplied for the purge gas to exit the sensor. To insert, push the tube
firmly into the orifice. To remove, push on the ring surrounding the tube, and pull the tube out. For
certain applications such as waste gas, a 3 mm (1/8") Swagelok fitting is provided for the purge gas
exit, to enable safe evacuation of an eventually hazardous gas.
A source of dry and filtered gas (pure at 99.8%) is required with a flow rate set at 10 to 50 mL/min.,
and a pressure regulated at 2 bar gauge. Do not exceed this, since excess pressure will deform the
membrane and change measurements.
To check the flow rate, put the exit tube into a cup of water. With the instrument turned on, you
should see at least three bubbles per second during the purge cycle.
CAUTION
Do not leave the exit tube in water, as there is a risk that moisture will get sucked back into the sensor and
damage it.
Purge safety backup unit
The gas analyzer must be switched on at all times, and purge gas must be
constantly supplied to purge the sensor cell, to prevent damage to the
sensor electronics.
However, in the event of a mains power outage, the 32605 purge backup
unit ensures that the purge gas supply to the TC sensor is not interrupted at
any time. The cycle is slower than usual (around one minute), for
approximately four days.
The green LED is on as long as the battery charge is OK. The red LED is on
when charging is needed. To save batteries, both LEDs are out when the
backup unit is in use, and mains power is out.
In-line temperature sensor
The in-line temperature sensors give the sample temperature directly from the sample flow, as a
replacement for the temperature sensor installed inside the thermal conductivity sensor.
10 English
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