WEBTEC DHM 4 Series Bedienungsanleitung
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DHM 4 Series Digital Hydraulic Multimeter
with Data Record & Wireless Transfer
Baureihe DHM 4 Digitaler Hydraulik-Multimeter
mit Datenaufzeichnung und drahtloser Übertragung
Série DHM 4 Multimètre Hydraulique Digital
avec enregistrement des données et transfert sans fil
Tester hidráulico digital serie DHM 4
con grabación y transferencia inalámbrica de datos
www.webtec.com
EU - English
This product contains a Bluetooth® Low Energy Module which broadcasts in the license free ISM Band as follows:
l2.402 to 2.480GHz
lChannels 0-39
lTransmit power: +7dBm
EU - Deutsch
Dieses Produkt enthält ein Bluetooth® Low Energy Modul, welches im lizenzfreien ISM-Band sendet und zwar wie folgt:
l2.402 bis 2.480GHz
lKanäle 0-39
lSende-Leistung: +7dBm
UE - Français
Ce produit contient un module basse consommation Bluetooth® qui fonctionne avec la licence gratuite ISM comme
ci-dessous :
l2.402 à 2.480GHz
l0-39 voies
lPuissance transmise: +7dBm
UE - Español
Este producto contiene un módulo Bluetooth® de energía baja que emite en la licencia libre ISM Band de la siguiente:
l2.402 a 2.480GHz
lCanales 0-39
lPotencia de transmisión: +7dBm
United States
Contains Transmitter Module FCC ID: T9JRN4020
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment o and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
lReorient or relocate the receiving antenna.
lIncrease the separation between the equipment and receiver.
l Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
lConsult the dealer or an experienced radio/TV technician for help.
Canada
This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following
two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence.
L’exploitation est autorisée aux deux conditions suivantes: (1) l’appareil ne doit pas produire de brouillage, et (2)
l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en
compromettre le fonctionnement.
Contains transmitter module IC: 6514A-RN4020
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum
(or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users,
the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not
more than that necessary for successful communication.
Conformément à la réglementation d’Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne
d’un type et d’un gain maximal (ou inférieur) approuvé pour l’émetteur par Industrie Canada. Dans le but de réduire
les risques de brouillage
radioélectrique à l’intention des autres utilisateurs, il faut choisir le type d’antenne et son gain de sorte que la
puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas l’intensité nécessaire à l’établissement d’une
communication satisfaisante.
English
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Introduction
The DHM range of hydraulic testers can measure and record the fundamental parameters of
ow, pressure and temperature in a hydraulic circuit. The instrument can be used to display
hydraulic power calculated from ow and pressure and also indicate pump volumetric eciency
based on a captured start point.
Snap-shots of the hydraulic parameters can be captured at the press of a button when the data
is saved to memory. Stored data can be retrieved from the tester with the Webtec “Quickcert”
App’ from where it can be compiled in to a certicate that can be emailed.
iOS® App’
Visit the iTunes® store and download the Webtec Quick Cert App’ to your mobile device.
Webtec Portable Hydraulic Testers have been designed for easy connection to a hydraulic
circuit. Testers can take full back pressure up to 420/480 bar (6000/7000 psi) depending on the
model and the built in loading valve enables many of the operating conditions to be simulated.
The tester can be connected anywhere in the hydraulic system to test pumps, motors, valves
and cylinders in both ow directions.
There are dierent sizes and porting options to cover a wide range of ows.
Before rst operating the equipment read the whole of these instructions. Safety may be
impaired if they are not followed.
Webtec have been designing and manufacturing ow meters and hydraulics components for 50
years. We operate within a Quality Management System that complies with the requirements of
BS EN ISO 9001 which is externally audited and certicated each year. Beyond compliance to
the standard, Webtec is committed to continually improving in everything we do; with particular
emphasis on understanding what matters to our customers and suppliers, and designing our
systems and work to meet their needs. We are always keen to hear from customer who may
have special requirements not covered by our standard ranges.
English
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Basic operation
Flow measurement
The tester measures flow using an axial turbine mounted in the aluminium base block. The oil flow
rotates the turbine and its speed is proportional to the oil velocity. The revolutions of the turbine
are measured by means of a magnetic sensing head which feeds a pulse to the electronics every
time a turbine blade passes. The electronic circuit has a built-in micro processor to correct the
signal and maximise accuracy. The readout is calibrated in lpm or gpm.
Pressure
Pressure is measured by the microprocessor from a diaphragm transducer fitted to a
bi-directional valve. The Bi-Directional shuttle valve automatically reads the highest pressure
in both directions of flow. A gauge port is provided on the block for the addition of a low
pressure gauge.
Temperature
The temperature is measured with a thermistor transducer in contact with the oil flow and the
readout on the meter is scaled at 32 - 250°F or 0 - 120°C.
Bi-Directional Loading Valve
The reverse flow valve provides virtual shut-off and pressure control in both directions of flow.
The loading valve has two easily replaceable safety discs located in the valve assembly which
internally protect the tester and machine in both flow directions.
Installation guidance
lAll hydraulic connections should be made by suitably qualied personnel.
lAvoid sharp bends because high pressure hoses will deect and straighten under pressure.
lA preliminary check of the hydraulic system’s oil supply, pump rotation, lters, oil lines,
cylinder rods as well as looking for external leaks should be made prior to installing the
Hydraulic Tester.
lAlthough the Bi-Directional tester can be used in both ow directions, the preferred direction
is indicated by the larger arrow on the serial number plate. When the tester is used for
reverse ow tests, slightly lower accuracies may be obtained depending on the oil viscosity,
density and compressibility.
lThe tester should be connected to the hydraulic circuit by means of exible hoses 1 - 2
metres long.
lThe use of quick-disconnect couplings can save time but should only be used > 500mm
away from the tester ports. Make sure the hoses are long enough so that the tester can be
used safely on the machine.
lThe hoses and ttings at the inlet to the tester must be of adequate size for the ow being
tested. Elbows, rotary couplings etc., at the inlet and outlet ports of the tester should be
avoided to ensure accurate readings.
lThe use of the exible hoses will help to isolate the test unit from vibration which often exists.
lThe internal burst discs are to protect the tester not the hydraulic installation. Always ensure
the appropriate relief devices are tted to protect the installation.
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General Operation
All tests should be performed by suitably qualified personnel.
1. Connect the Tester to the circuit (see above for installation guidance)
2. Ensure that the pressure loading valve is fully opened by turning the knob counter clockwise.
3. Switch the unit on. On digital models if the display ashes then the battery needs replacing.
4. Select the desired test using the front panel controls.
5. IMPORTANT: Ensure that all connections are tightened and the oil can ow freely throughout
the hydraulic system BEFORE running the machine at full speed. Check that the circuit is
correctly connected and any shut-o valves are opened. Also quick disconnect couplers
MUST be open.
6. Start the pump momentarily to ensure there is no obstruction which could cause pressure
build up.
7. Check for leaks and free ow of oil
8. The tester is now ready for use - run the machine and adjust the loading valve as needed
9. When the test is completed fully open loading valve.
Notes
When low pressure testing is required, connect the optional low pressure gauge with automatic
cut-out valve to the tester block.
Testers have an automatic electronic system which shuts the power off after approximately 20
minutes of inactivity should you forget. To reactivate the tester press the power button.
Performance
All 800 models have limited pressure control below 86 lpm (23 USgpm). The maximum
controllable pressure in this region is calculated by: Max. pressure (in bar) = 5 x flow (lpm) +30.
Do not use with water
The standard Webtec Hydraulic Testers are designed for use with mineral oil having reasonable
lubrication properties. They are not suitable for use with water or fluids with a high water
content. If a tester is contaminated with water it should be flushed immediately with white or
methylated spirit or similar and then flushed with mineral oil to minimise any internal corrosion.
This may avoid an expensive repair. Damage to a tester from the use of a non-approved fluid
invalidates our normal warranty.
English
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General Specification for all models
Ambient temperature: 5 to 40°C (41 - 104°F)
Fluid type: Hydraulic oil
Fluid temperature: DHM - 0 to 105°C (32 - 220°F)
Accuracy: see model specications
Construction materials
Case: Painted mild steel
Flow block: High tensile aluminium
Seals: Viton as standard - EP seals on request
Battery Details
PP3 9 volt Alkaline (IEC6LR61, ANSI/NEDA 1604A)
Dimensions and Weight
Model Height Width Depth Weight
DHM404 240 mm 200 mm 200 mm 6.5 kg
9.45 inches 7.87 inches 7.87 inches 14.33 lbs
DHM804 245 mm 225 mm 225 mm 10 kg
9.65 inches 8.86 inches 8.86 inches 22 lbs
Fluid viscosity
The performance of the tester can be affected by the viscosity of the fluid measured. Our
testers are calibrated at a mean viscosity of 21 cSt. The shaded area of the table shows the
range of viscosities that can be measured by a tester with standard calibration with minimal
effect on the accuracy (less than ± 1% FS).
Table showing kinematic viscosity (cSt) of different mineral
oils at specific temperatures
Fluid type
Temp °C ISO15 ISO22 ISO32 ISO37 ISO46 ISO68
0 85.9 165.6 309.3 449.9 527.6 894.3
10 49.0 87.0 150.8 204.7 244.9 393.3
20 30.4 50.5 82.2 105.5 127.9 196.1
30 20.1 31.6 48.8 59.8 73.1 107.7
40 14.0 21.0 31.0 36.6 44.9 63.9
50 10.2 14.7 20.8 23.9 29.4 40.5
60 7.7 10.7 14.7 16.5 20.2 27.2
70 6.0 8.1 10.9 12.0 14.6 19.2
80 4.8 6.4 8.4 9.1 11.1 14.3
90 4.0 5.2 6.6 7.2 8.7 11.1
100 3.3 4.3 5.5 6.0 7.1 8.9
ISO 15, 22, 32, 46 and 68 based on typical figures for the Esso Nuto range of
HM oils. ISO 37 based on Shell Tellus HM oil.
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Model Number Flow Range (lpm) Pressure Range (bar) Inlet/Outlet Ports
DHM404-B-6 10 - 400 0 - 420 (0 - 600 peak) 1” BSPP
DHM804-S-7-L 20 - 800 0 - 480 (0 - 600 peak) 1-7/8” -12UN #24 SAE ORB
Specification
EU (lpm/Centigrade)
US (gpm/Fahrenheit)
Flow
The EU version displays flow in lpm, the US version displays flow in gpm.
Accuracy: ± 1% of indicated reading (over 15 - 100% of range).
Pressure and peak pressure
Measured using a built-in pressure transducer rated to 600 bar / 8700 psi. The transducer
has a typical response time of <1 ms to enable the accurate capture of peak pressures. The
meter samples the pressure transducer 1000 times per second and updates the peak display
appropriately. The engineering units for pressure can be changed using the ‘pressure units’
button on the front panel. Standard units are ‘BAR, PSI, MPA, KSC’.
Accuracy: Pressure 0.5% FSD, Peak 1% FSD.
Peak Pressure: capture rate = 1ms
Temperature
Sensed by a thermistor built into the flow transducer to maximise contact with the oil flow
and ensure fast response. The EU version displays temperature in °C, the US version displays
temperature in °F.
Accuracy: ± 1°C, 2°F.
Power
Calculated from the flow and pressure, the hydraulic power is displayed in either HP or KW.
The engineering units for power are linked to the pressure units and can be changed using the
‘pressure units’ button on the front panel.
Accuracy: ± 3 kW / 4 HP (≤ 100 kW / 134 HP), ± 5 kW / 6.7 HP (> 100 kW / 134 HP).
Volumetric efficiency
Calculated as a ratio of the flow at high pressure to the flow under reference conditions.
Volumetric Efficiency is expressed as a percentage, at constant rpm.
Accuracy: ± 1% point.
Data Recording: up to 12 sets of data points can be saved to internal memory
LCD Display: High contrast, fast response 4 line display. Update rates of measurements:
Digital values @1.4Hz
Analogue bars @ 14Hz
Peak Pressure capture @1ms
Battery Life: approximately 15 hours of normal use with high capacity Alkaline unit.
IP54 Internal Protection of electronic circuits.
iOS® App’
Application programs are only available for phones or tablets running iOS operating systems.
Handheld devices must support Bluetooth® Smart (v4.1) or greater.
Apple iOS v8.1 or higher.
NB. For Apple iPhone 5S upwards.
Model Number Flow Range (gpm) Pressure Range (psi) Inlet/Outlet Ports
DHM404-S-6 2.5 - 100 0 - 6000 (0 - 8700 peak) 1-5/16” -12UN #16 SAE ORB
DHM804-S-7 5 - 210 0 - 7000 (0 - 8700 peak) 1-7/8” -12UN #24 SAE ORB
* DHM804 has limited pressure control below 86 lpm (23 US gpm). The maximum controllable pressure in
this region is calculated by: max pressure (in bar) = 5 x ow (lpm) + 30
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lContrast up - Press & hold to make the screen text darker and easier to read in dierent
light conditions.
lContrast down - Press & hold to make the screen text lighter.
lRecord data – Pressing this button when viewing live data (screen 1, 2 or 3) will record the
current values.
lToggle screen - This button toggles through the four display screens, three live data views
and the record review screen.
lToggle between temperature & power (P-Q) - Pressing this button will change the
bottom line of the display from temperature to power. This button is also used to start the
eciency display on screen 3.
lClear peak - Press to clear the peak pressure value
lToggle pressure and power units - Toggles through a selection of engineering units for
pressure and the corresponding power units.
lON/OFF button – A momentary press turns the unit ON. Press and hold for 2sec to turn
OFF.
DHM 4 Series Digital Hydraulic Multimeter
Toggle
screen Clear peakToggle:
temperature
& power
Toggle
pressure and
power units
Battery
cover
Record
Data
Digital display
Contrast
up Contrast
down On/Off switch
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This screen displays the measurement type, value and engineering units in digital format.
Bottom line displays either Power or Temperature depending on selection.
This screen displays the measurements in the same order as in SCREEN 1, but this time
displays the value, engineering units and a bar graph which corresponds to the value
indicated. The bar graph is scaled from zero to the maximum value for the tester (see below).
Bottom line displays Power or Temperature depending on selection.
NB. Analogue bars update @14Hz to provide a visual indication of rapid activity.
Screen 1 (Digital)
Screen 2 (Analogue)
Screen 3 (P - Q)
Bar graph scaling: EU US
DHM404 DHM804 DHM404 DHM804
Flow LPM 0 - 400 0 - 800 GPM 0 - 100 0 - 210
Pressure BAR 0 - 600 0 - 600 PSI 0 - 8700 0 - 8700
Peak BAR 0 - 600 0 - 600 PSI 0 - 8700 0 - 8700
Temperature °C 0 - 120 0 - 120 °F 32 - 250 32 - 250
Power kW 0 - 400 0 - 800 HP 0 - 536 0 - 1072
This screen is used for testing pump volumetric efficiency. The screen initially displays flow
and pressure on the top two lines as in SCREEN 2 and power on the bottom two lines. Once
the efficiency reference point has been captured, then the third line displays the current
efficiency and the bottom line shows the reference point, the top two lines will continue to
display the current flow and pressure.
Screen 4 (Data Review)
This screen displays any recorded parameters and provides delete options.
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To turn the meter ON press this button momentarily.
To turn the meter OFF press and hold this button.
As the meter turns on two information screens display status data including:
lCurrent version of software running on the meter.
lTotal run time in minutes.
lTurbine type.
lTurbine calibration number.
lCalibration date.
lMeter serial number.
After the two information screens the meter reverts to the previously used display screen.
Note: Low battery warning is issued by the display screen flashing. Reliable operation
cannot be expected in these circumstances - the battery must be replaced.
DHM Operation
As pressure changes the actual and peak values are updated on the display. Peak
pressure is captured at a typical rate of 1ms, allowing the display of rapid transition
spikes, otherwise missed.
Pressing the P-Q button while on screen 1 will toggle the bottom line, temperature
display between power and temperature.
When the meter is turned ON the contrast buttons can be used to adjust the display
to suite the ambient light conditions. Settings are saved.
Pressing the clear peaks button clears the peak capture memory.
Pressing the pressure units button scrolls through the available pressure engineering
units. If power is being displayed, then its engineering units will change to suite the
selected pressure units.
Pressing the screen selection button scrolls through the four available screens: digital
display, digital + bar graphs, power/efficiency and record review.
Pressing the P-Q/HP button while in screen 3 initiates the efficiency display. It
captures the flow and pressure to memory and treats this as the 100% reference
point. The bottom line of the display shows the flow and pressure that are saved as
the reference marker:
Dieses Handbuch passt für folgende Modelle
6
Inhaltsverzeichnis
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