Mounting instructions Special torque transducer TCAS4 / MPZ2001066B HBM: Business Document
Directory 1 Safety Instructions ........................................................................................................................................ 3 2 Markings used ............................................................................................................................................... 1 2.1 Symbols on the transducer.................................................................................................................. 1 2.
1 Safety Instructions FCC Compliance & Advisory Statement Important Any changes or modification not expressly approved in writing by the party responsible for compliance could void the user’s authority to operate the device. Where specified additional components or accessories elsewhere defined to be used with the installation of the product, they must be used in order to ensure compliance with FCC regulations. This device complies with Part 15 of the FCC Rules.
Model: TCAS4 FCC ID: 2ADAT-TCAS4 IC: 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. Fig. 1.
Use as a machine element The torque flange can be used as a machine element. When used in this manner, it must be noted that, to favor greater sensitivity, the transducer is not designed with the safety factors usual in mechanical engineering. Please refer here to the section “Loading capacity limits", and to the specifications.
with the mounting and operating instructions, these safety instructions or any other applicable safety regulations (safety and accident prevention regulations), when using the transducers. Transducers can break, particularly in the case of overloading. The breakage of a transducer can also cause damage to property or injury to persons in the vicinity of the transducer.
1 2 Markings used 2.1 Symbols on the transducer Label example Label example with FCC ID number Location of label on the stator unit.
2 2.2 The markings used in this document Important instructions for your safety are specifically identified. It is essential to follow these instructions in order to prevent accidents and damage the property. Symbol Meaning This marking warns of a potentially dangerous situation in which failure to comply with safety requirements can result in death or serious physical injury.
3 4 Structure and mode of operation The torque flange consists of two separate parts: the rotor and the stator. The rotor comprises the measuring body and the signal transmission elements. Strain gauges (SGs) are installed on the measuring body. The rotor electronics for transmitting the bridge excitation voltage and the measurement signal are located centrally in the flange.
4 Fig. 4.2: EMI suppressor at stator unit Important The use of the shielding plates is important to ensure compliance with FCC regulations. If the shielding plates has to be removed for any purpose (e.g. installation or maintenance), they must be replaced in the original position before the product is used.
5 5 Mechanical installation 5.1 Important precautions during installation Note A torque flange is a precision measurement element and therefore needs careful handling. Dropping or knocking the transducer may cause permanent damage. Make sure that the transducer cannot be overloaded, including while it is being mounted. • Handle the transducer with care.
6 Important Even if the unit is installed correctly, the zero point adjustment made at the factory can shift by up to approx. 0.5% of the characteristic value. If this value is exceeded, we advise you to check the mounting conditions. If the residual zero offset when the unit is removed is greater than 1% of the sensitivity, please send the transducer back to the Darmstadt factory for testing. 5.
7 5.4.
8 5.4.
9 5.5 Mounting the rotor Tip Usually the rotor identification plate is no longer visible after installation. This is why we include with the rotor additional stickers with the important characteristics, which you can attach to the stator or any other relevant testbench components. You can then refer to them whenever there is anything you wish to know, such as the shunt signal.
10 Fig. 5.1: Bolted rotor connection 2. For the connection of flange A (see Fig. 5.1), use DIN EN ISO 4762 property class 10.9 hexagon socket screws of a suitable length (dependent on the connection geometry, see Tab. 5.1). We recommend fillister head screws DIN EN ISO 4762, blackened, smooth headed, permitted size and shape variance in accordance with DIN ISO 4759, Part 1, product class A. 3. Fasten all screws with the specified torque (Table 5.1). 4.
11 Note Comply with the maximum screw-in depth as per Tab. 5.1. Otherwise significant measurement errors may result from torque shunt, or the transducer may be damaged. Important Dry screw connections can result in different and higher friction factors (see VDI 2230, for example). This means a change to the required tightening moments. The required tightening moments can also change if you use screws with a surface or property class other than that specified in Tab. 5.
12 5.6 Installing the stator On delivery, the stator has already been installed and is ready for operation. If necessary, the antenna segments can be divided from the antenna segment clamp for maintenance or to facilitate stator mounting. Important We recommend to use the stator ring as it is and to only open if absolutely necessary. When the flexible antenna segments are bent, they easily deviate from circularity. Prevent the antenna segments from a large deformation while bending.
13 2. Careful bend the antenna segments to the necessary amount of gap and slip the antenna ring over the thinnest part of the shaft nearby. 3. Use an appropriate mounting base to install the stator housing in the shaft train so that there is sufficient opportunity for horizontal and vertical adjustments. Do not fully tighten the bolts yet. 4. Now use two hexagon socket screws to mount the antenna segment clamp removed in Point 1.
14 Prevention of stator axial oscillation Depending on the operating conditions, the stator may be excited to vibrate. This effect is dependent on: • The rotational speed, • The antenna diameter, • The design of the machine base. Important To prevent this axial oscillation, the antenna ring requires additional support by the customer. There are two mounting slots on the upper antenna segment clamp (with an inner diameter of 5.5mm), which can be used to incorporate a clamping device.
15 6 General information • With extension cables, make sure that there is a proper connection with minimum contact resistance and good insulation. • All cable connectors or swivel nuts must be fully tightened. 6.2 EMC protection The product offered is a special assembly for stationary systems that is not available on the general market or a transducer for installation by system integrators and plant manufacturers.
16 Electrical and magnetic fields often induce interference voltages in the measuring circuit. Therefore: • Use shielded, low-capacitance measurement cables only • Only use plugs that meet EMC guidelines. • Do not route the measurement cables parallel to power lines and control circuits. If this is not possible, protect the measurement cable with e.g. steel conduit. • Avoid stray fields from transformers, motors and contact switches. • Do not ground the transducer, amplifier and indicator more than once.
17 6.3 Evaluation unit Fig. 6.
18 Functional overview of the evaluation unit (See fig. 6.1) Item Function description 1 Display Shows analog output voltage. For monitoring only - accurate measurement values to be read out on the output BNC connector 2 LED power The LED indicates the on/off status of the device 3 LED RF-level The LED indicates an acceptable RF signal strength from the transmitter 4 BNC output Voltage ±10V / frequency 10kHz±5kHz (select with switch no.
19 Technical details Supply voltage 9…36 VDC Max. power consumption 30 VA Signal bandwidth Switchable 1000 Hz / 100Hz Voltage output ±10 V Frequency output 5 … 15 kHz TTL Signal-to-noise ratio 63dB (1000Hz) / 83dB (100Hz) Signal transit time 450µs Wireless shunt calibration Key button at control unit Protection class IP40 Weight 700 grams Temperature range -10 … +70 °C Table 6.
20 6.4 Supply voltage The transducer must be operated with a separated extra low voltage (supply voltage 9 … 36 VDC). You can supply one or more torque flanges within a test bench at the same time. Should the device be operated on a DC voltage network1), additional precautions must be taken to discharge excess voltages. The information in this Chapter relates to the self-contained operation of the special torque transducer without HBM system solutions.
21 6.5 Use of EMI suppressor To suppress high frequencies two EMI suppressors on the cable between rotor and stator has to be used. Use at least 3 loops of the cable for the ring EMI suppressor. The snap ferrite has to be mounted on the cable directly behind the connector at the Axon control unit. Fastening must be done in an area not subject to mechanical loads (i.e. no unwanted vibrations, etc.) using cable ties fit for the specific application. Fig 6.
22 Ring ferrite: Type: Vitroperm 500F Model No.: T60006-L2063-W517 Size: external diameter x internal diameter x height = 63 x 50 x 25 Snap Ferrite: Type: Würth 742 711 31 Fig 6.2: Picture of installation example of both EMI suppressors Important The use of the EMI suppressor on the power cable is mandatory to ensure compliance with FCC regulations.
23 7 Shunt signal The special torque flange delivers an electrical shunt signal that can be activated from the evaluation unit for measuring chains with HBM components. The transducer generates a shunt signal of about 50% of the nominal (rated) torque; the precise value is specified on the type plate. After activation of push button no. 15 (see Fig. 6.1), the shunt signal is activated for a time span of 5s.
24 8 Functionality testing You can check the functionality of the rotor and the stator from the LEDs on the evaluation unit. LED no. 2 (green), power status LED (orange), cal-function status LED no. 3 (green), RF level status Fig. 8.1: LEDs on the evaluation unit LED Color Significance LED no. 2 (power status) Green (permanently lit) The main switch (no. 6 in Fig. 6.1) is on and the evaluation unit is under power The main power is off normal operation Off (not lit) LED no.
25 9 Maintenance The torque transducer is maintenance‐free.
26 10 Dimensions of the rotor and stator antenna HBM: Business Document
27 11 Specifications Special Torque Transducer Accuracy class Nominal torque Nominal speed Nominal (rated) sensitivity (spread between torque = zero and nominal (rated) torque) Voltage output Frequency output Sensitivity tolerance (deviation of the actual output quantity at Mnom from the nominal (rated) sensitivity) Measurement frequency range Nominal (rated) temperature range (rotor+ stator antenna) Thermal effects per 10 K in the nominal (rated) temperature range on the output signal, relative to the act
28 12 Declaration of conformity HBM: Business Document
29 Hottinger Baldwin Messtechnik GmbH. Subject to modifications. All product descriptions are for general information only. They are not to be understood as a guarantee of quality or durability. Hottinger Baldwin Messtechnik GmbH. Änderungen vorbehalten. Alle Angaben beschreiben unsere Produkte in allgemeiner Form. Sie stellen keine Beschaffenheits- oder Haltbarkeitsgarantie im Sinne des §443 BGB dar. Hottinger Baldwin Messtechnik GmbH Im Tiefen See 45 • 64293 Darmstadt • Germany Tel.
