Hontzsch flowtherm NT User manual

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Operating Instructions
flowtherm NT
Software status from 2.01
Multifunctional handheld unit with data logger for measuring flow rate,
flow velocity, temperature, pressure and other variables

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Overview and brief introduction of controls and connections
For settings and other
functions see Section 5
Please ensure that the correct sensor (FA, VA or TA) is selected (see under 5.3.20.1)!
Thermal sensors TA, TADi
Always connect just one sensor at a time!
Vane wheel sensors FA(R), FT,
FA(R)Di or vortex sensors VA, VAT, VADi
or temperature sensors Pt100
2 analog outputs 0-10 V
analog input 4-20 mA
analog input 0-10 V
Connector socket cap
Close any connections not in use!
Measured value display
Input channel 1: name/unit
value
Input channel 2: name/unit
value
Input channel 3: name/unit
value
Function keys Designation
Function keys
, , with variable
functions depending on
operation menu
USB connection type 'B'
for connecting to PC or
adapter plug
Switch off
and reset
Switch on
Input channel
and status info
Battery compartment
for 4 batteries / recharge-
able batteries Mignon (AA)
Arrow keys (measured value dis-
play)
,: shift between
1, 2 and 3 values
, : scroll the 3 values
with display of 1 and 2
values
ok key (measured value display)
: switching the display light on
or off
Holding magnet
for fixing the unit to
metal surfaces

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Contents
1Safety Instructions.....................................................................................................................4
1.1 Specific information...........................................................................................................4
1.2 Handling batteries and accumulators ...................................................................................5
1.3 Precautions for hazardous areas..........................................................................................5
2Scope of Delivery.......................................................................................................................6
2.1 Description, type plate.......................................................................................................6
3Technical Specifications ..............................................................................................................8
3.1 Operating conditions..........................................................................................................8
3.2 Housing and connection .....................................................................................................8
3.3 Electrical data...................................................................................................................8
3.4 Measurement uncertainty...................................................................................................9
4Initial Operation / Startup ...........................................................................................................9
4.1 Connector sockets.............................................................................................................9
4.2 Wiring diagram for the 8-pin connector plug .......................................................................10
4.3 Wiring diagrams for the 12-pin connector plug.................................................................... 11
5Operation ............................................................................................................................... 12
5.1 Key functions..................................................................................................................12
5.2 Setup menu after switch on: ............................................................................................ 14
5.3 Parameter settings ..........................................................................................................16
5.3.1 FA - Basic settings .............................................................................................16
5.3.2 FA - Measurement settings..................................................................................17
5.3.3 FA - Density correction .......................................................................................18
5.3.4 FA –Operating conditions ................................................................................... 19
5.3.5 FA –Standard conditions ....................................................................................19
5.3.6 FA - Pairs of values ............................................................................................ 19
5.3.7 VA - Basic settings ............................................................................................. 20
5.3.8 VA - Measurement settings .................................................................................20
5.3.9 VA –Operating conditions ...................................................................................21
5.3.10 VA –Standard conditions .................................................................................... 21
5.3.11 VA - Pairs of values ............................................................................................22
5.3.12 TA - Basic settings .............................................................................................22
5.3.13 TA - Measurement settings..................................................................................22
5.3.14 TA –Standard conditions .................................................................................... 23
5.3.15 TA - Pairs of values ............................................................................................24
5.3.16 Pt100 - Unit ......................................................................................................24
5.3.17 Analog input......................................................................................................24
5.3.18 Output..............................................................................................................25
5.3.19 Counter ............................................................................................................25
5.3.20 Display ............................................................................................................. 25
5.3.21 Long-term measurement ....................................................................................27
5.3.22 Device .............................................................................................................. 29
5.3.23 Factory settings .................................................................................................29
5.3.24 Data logger ....................................................................................................... 29
5.3.25 Device status..................................................................................................... 30
5.3.26 Device profiles ...................................................................................................31
5.3.27 Key F3 - LM-Start .............................................................................................. 31
5.3.28 Key 4 Switch off / OFF (reset) .............................................................................31
6Troubleshooting.......................................................................................................................32
7Replacement Parts ................................................................................................................... 33
8Instruction Manual Category 3G flowtherm NT ............................................................................. 33
8.1 Equipment .....................................................................................................................33
8.2 Safety Instructions ..........................................................................................................33
8.3 Technical Data ................................................................................................................34
8.4 Installation..................................................................................................................... 34
8.5 Maintenance ...................................................................................................................34
9Declaration of conformity..........................................................................................................35

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1Safety Instructions
Danger to life, risk of injury and damage to material or property.
Read the Operating Instructions carefully before initial operation.
Observe general safety precautions as well as those included in various sections of these Operating
Instructions.
Hazard risks:
-non-observance of the Operating and Safety Instructions
-modifications to the device by the customer
-handling the device outside the specified operating conditions
-handling the sensors outside the specified operating conditions
-use of unsuitable power supplies and peripheral devices
-improper use of the device
Prevention of voltage hazards:
-use only the dedicated adapter plug for the mains supply
-make sure that the PC is correctly connected to the mains (earthed safety socket, earthing) when
using a USB connection
-when connecting analog outputs or inputs to peripheral devices make sure that these are correctly
connected to the mains (earthed safety socket, earthing)
Danger when installing the sensors in pressurized pipelines:
-sensors for use in pressurized pipelines are to be inserted or retracted only in depressurized con-
ditions; non-observance may result in serious injuries to personnel
-when installing or removing under pressure, the appropriate protective equipment must be used, e.g.
ball valve and probe guide pieces with chain guard or spindle probe guide pieces
Danger when using in explosive atmospheres:
-the unit and its sensors may be used in areas specified for category 3G (zone 2 gas) equipment only
-if sensors with category 1/2 G, 1/2 D or 2 G, 2 D or 3 D markings are connected to the device they
may be used in category 3G areas only! (See also Instruction Manual Category 3G and
Declaration of Conformity in Sections 8 and 9)
1.1 Specific information
-pay special attention to the mains voltage when using voltage converters
-observe the maximum power rating when connecting sensors powered by more than 12 V
-when operating out of doors make sure that the battery compartment cover and sensor plug are
screwed on tightly, the connector sockets not in use are firmly capped, and the USB connection cover
is tightly sealed, otherwise the IP65 protection cannot be guaranteed

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1.2 Handling batteries and accumulators
-All batteries/accumulators must be replaced at the same time. Do not replace single cells! All replace-
ments must be identical (cell type / nominal capacity / make) and fitted the right way round. Possible
reverse polarity of single cells is to be avoided (electrolyte formation)
-Recharge batteries with a suitable charger away from the unit
-Remove batteries when they are dead or if the device is not being used for any length of time to avoid
leakage
-Batteries contain hazardous substances and must never be disposed of in household waste
-Never recharge normal batteries
1.3 Precautions for hazardous areas
-It is prohibited to use rechargeable batteries in hazardous areas
-Do not connect or disconnect plugs in hazardous atmospheres. This also applies to connected sensors
which must be mechanically screwed in place
-Use of the USB port in hazardous areas is not allowed without the protective USB cover
-Use of the USB port as a power supply is prohibited
-It is forbidden to change batteries in the hazardous environment
-Prior to measuring always check that the battery compartment is closed correctly to ensure that the
batteries are securely fixed. The compartment cover must be screwed on tightly before use
-If severe fluctuations in temperature are to be expected, the device should be left to adapt
to the ambient temperature for at least one hour before use to avoid problems with condensation.
In particular, the battery contacts should be checked for condensate or corrosion as well as leakage
-Devices in which the batteries have leaked must on no account be used in hazardous atmospheres, but
must be returned to the manufacturer for repair
-Mechanical shocks are to be avoided
-Damaged instruments should be checked before use. If in doubt, return to the manufacturer for inspec-
tion

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2Scope of Delivery
-handheld flowtherm NT
-Operating Instructions and Data Sheet flowtherm NT
-FA, VA or TA sensor(s) as ordered
-relevant Data Sheet for above
-other sensors such as Pt100, if ordered
-accessories for sensors, e.g. extension rod for FA sensor, if ordered - CD-ROM with PC software HLOG
II and USB cable (optional)
-adapter plug and USB cable (optional)
-various connection and extension cables, connectors (optional)
-carrying case (optional)
Please check that everything listed in the Delivery Note / Technical Data Sheet is included in the delivery.
2.1 Description, type plate
The flowtherm NT is a multifunctional handheld unit with data logger for measuring flow velocity, volume
flow/flow rate, standard flow rate, mass flow rate, temperature, pressure and other variables, insofar as
they are measurable / deducible with connectable sensors:
-vane wheel FA, FAR, FT, FADi, FARDi
-vortex VA, VAT, VADi
-thermal TA10, TADi
-temperature Pt100
-2-wire 4-20 mA 12 V supply
-3- or 4-wire 4-20 mA output and 12 V supply
-3- or 4-wire 0-10 V output and 12 V supply

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The following type plate is found on the back of the unit:
Description of type plate specifications:
1: Description
see Section 2.1
2: Unit and serial no.
3: Marking for Ex-application category 3G
see Safety Instructions Section 1
see Instruction Manual Category 3G Section 8
see Declaration of Conformity Section 9
4: Inputs
see Description Section 2.1
see Connector sockets Section 4.1
see Wiring diagrams Section 4.2 and 4.3
5: Outputs
see Electrical data Section 3.3
see Connector sockets Section 4.1
see Wiring diagrams Section 4.3
6: USB connection
see Electrical data Section 3.3
see Connector sockets Section 4.1
7: Power supply
see Safety Instructions Section 1
see Electrical data Section 3.3
8: Operating conditions
see Safety Instructions Section 1
see Operating conditions Section 3.1
1
2
3
4
5
6
7
8

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3Technical Specifications
3.1 Operating conditions
Ambient temperature
of connection housing in service : -20 ... +50 °C
Type of protection : IP65
3.2 Housing and connection
Type of protection : IP65 with battery compartment cover and sensor plug screwed on
tightly, connector sockets not in use firmly capped, and USB connection
cover tightly sealed
Material : electrically conductive ABS plastic
External measurements, weight : W/H/L = 96/42/197 mm, approx. 520 g
Connections : 5-pin connector plug for thermal sensors
: 8-pin connector plug for vane wheel, vortex or temperature sensors
12-pin connector plug for analog outputs or inputs
USB for data logger readout, configuration and external power supply
via PC or mains adapter
3.3 Electrical data
Power supply : via 4 alkaline manganese (LR6) Mignon (AA) 1.5V batteries
(maximum permissble nominal capacity 4000 mAh per cell)
running time (Duracell Plus) approx. 24 hours
(using FA sensor without display light)
or via 4 NiMH rechargeable Mignon (AA) 1.2V batteries
running time (Ansmann Digital 2850 mAh) approx. 26 hours
(using FA sensor without display light)
Open the battery compartment with a screw driver. Always change all 4 batteries at the same time,
checking for correct polarity. Only ever recharge batteries away from the unit using a suitable charger.
Always ensure that all 4 rechargeable batteries are fully charged before inserting. To close the compart-
ment press it firmly in the seal (in the direction of the connector sockets) and screw down tightly.
Mains supply : via USB connection with PC or adapter plug
Supply current : via USB connection not less than 300 mA
The mains supply is not electrically isolated from the outputs.
The "-" connection of the analog outputs and the earth of the USB connection have the same potential, i.e.
for EMC reasons a peripheral device should have potential-free inputs for evaluation of the analog outputs
when connecting to a PC.

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Analog outputs (2 x) : 0 ... 10 V with internal resistance of 1000 Ohm; measured, initial and
final values adjustable as appropriate
Analog input 4-20 mA : for connection of sensor in 2-wire system with 12 V;
allocation of unit, initial value and final value adjustable
Analog input 0-10 V : for connection of sensors with voltage output; input resistance 5 MOhm;
12 V power supply for sensors, max. 100 mA; allocation of unit, initial
value and final value adjustable
3.4 Measurement uncertainty
Input FA : +/- 1 Hz
Input VA : +/- 1 Hz
Input TA : +/- 1 (0.7 % of measured value + 0.02 % FS)
Temperature display : +/- 1 Kelvin
Analog input 0-10 V : +/- 1 (0.3 % of measured value + 0.02 % FS)
Analog input 4-20 mA : +/- 1 (0.3 % of measured value + 0.02 % FS)
Input Pt100 : +/- 0.2 Kelvin
Analog output 1+2, 0-10 V : +/- 1 (0.2 % of measured value + 0.02 % FS)
All values apply for a set damping rate of 30 seconds during measurement. In addition, the measurement
uncertainty of the utilised sensors must be taken into consideration.
4Initial Operation / Startup
For installation and operation of the system, especially in category 3G, the national regulations
currently in force, the recognised standards of good practice and these Operating Instructions
apply.
4.1 Connector sockets
5-pin connector socket:
for thermal sensors TA10 and TADi measuring tubes
8-pin connector socket:
for vane wheel sensors FA, FAR, FT and FADi measuring tubes
for vortex sensors VA, VAT and VADi measuring tubes
for temperature sensors Pt100

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2
8
6 7
4
1
5
3
Always connect just one sensor at a time!
Always make sure that the connector sockets not in use are firmly capped, the sensor plug is
screwed on tightly and the USB connection cover is tightly sealed, otherwise the IP65 protection
cannot be guaranteed
4.2 Wiring diagram for the 8-pin connector plug
Electrical connection must be carried out according to the relevant wiring diagram.
Incorrect connection can cause serious damage to the electronics.
Wiring diagram with view of solder contacts:
Pin assignment
Pin 1: v/FA+FAR signal 1 For v/VA signal F
Pin 2: ground G
Pin 3: Pt100
Pin 4: Pt100
Pin 5: Pt100
Pin 6: Pt100
Pin 7: v/FAR signal 2 F
Pin 8: V+
Housing: shield
12-pin connector socket:
for analog outputs 2 x 0-10 V
for analog input 4-20 mA
for analog input 0-10 V
USB connector socket type B
data logger readout, hardware configuration
for external power supply via PC or adapter plug