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Huayi H707 Instruction

Loop calibrator
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H707
Loop Calibrator
Instruction
Shenzhen Huayi Instrument Technology Co., Ltd.

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Summary of Contents for Huayi H707

  • Page 1 H707 Loop Calibrator Instruction Shenzhen Huayi Instrument Technology Co., Ltd.

  • Page 2: Safety Information

    1.Safety information hereafter to be referred as “Calibrator” H707 Loop Calibrator ( ) is an accurate tool for current supplying and measuring. The calibrator can deliver source output 0-24mA and simulate two-wire transducer output 0-24mA, and can measure 0-20mA or 4-20mA current loop, as well as measure DC voltage up to 28V.

  • Page 3: Button Function

    • Use the calibrator after confirming that the battery cover is closed. • Once the symbol (low battery power) appears, please replace the battery to avoid possible reading error. • It must remove the test wire from the calibrator before open the housing or battery door.
  • Page 4 Each pressing of this button goes to below mode in turn: •SOURCE mA (source output mA) •SIMULATE mA (analog output mA) •Loop Power (supply loop power) •MEASURE mA (measure DC mA) •MEASURE V (measure DC voltage) By pressing the turncap, the current output could be adjusted to resolution of 1µA 、...
  • Page 5 Press to start SpanCheck from 0% of selected current span (e.g., 0mA within 0-20mA span, or 4mA within 4-20mA span), “SpanCheck” will appear. Press it again, then start from 100%. Press simultaneously to switch among mA output spans. • 4 mA-20 mA =0%-100% (default value) •...
  • Page 6 3. Use 3.1 mA current output model The calibrator can output current which may used to calibrate and test 0-20 mA and 4-20 mA current loop and instrument. In SOURCE model, The calibrator can supply current. In SIMULATE model, the calibrator can simulate two-wire transducer which uses a set of external source.
  • Page 7 Supply mA current Use SOURCE mode to supply current to passive circuit. There must be path which allows the current to flow between “+” terminal and COM terminal, or it will show overload (figure flashing) when you setting up the output value. Press until Press...
  • Page 8 Analog transducer When the calibrator is used as an analog transducer, it can adjust the output loop current to the known value you selected. There must be 12-28 V loop source. Please connect the test wires as the figure below. Press until Press...
  • Page 9 3.2 Auto linear increasing mA output Auto lope current output allow the calibrator to output passive (supply current) or active (simulate) loop current that is continuously changing. And you can still leave your hands free to test calibrator responsibility. Press to enter into “Auto lope current output”...
  • Page 10 Press any key or rotate the turncap to exit this function. 3.3 Measure DC current (mA) Caution To avoid damage to the device during test, please ensure the calibrator in proper model before connecting the test wire. To test mA DC: 1.
  • Page 11 3.4 Measure mA current with loop Power Caution To avoid damage to the device during test, please ensure the calibrator in proper model before connecting the test wire. Under this model, the calibrator can supply +24V loop power to the transducer,and read the loop current value at the same time.
  • Page 12 3.5 Measure DC voltage Caution To avoid damage to the device during test, please ensure the calibrator in proper model before connecting the test wire. To measure DC voltage 1. Press to step to MEASURE model. The display shows MEASURE V. 2.
  • Page 13 3.6 Power Requirements for the power Single battery 9V (ANSI/ENDA 1604A or IEC 6LR61) Battery life (typical value): Battery model: about 3 hours (500 with load 12 mA); MEASURE/SIMULATE: 7 hours Setting for battery power-saving function By default, the calibrator will be auto-off after using for 15 minutes after switch 1.
  • Page 14 Accuracy specification The accuracy is only applicable to 1 year after calibration with operation temperature 18 ℃ - 28 ℃ , which shown as ± ([% of the reading]+[count]). 4.1 MEASURE V dc Range: 0 — +28V Resolution: 1mV (mV) Input impedance: 1M Accuracy: ±...

  • Page 15: Maintenance And Calibration

    Operation temperature: -10 ℃ ℃ - 55 Operation elevation: max 2000m in height Temperature coefficient: 0.005%×range/ ℃ (-10 ℃ — 18 ℃ or 28 ℃ — 55 ℃ Relative humidity: 95%-30 ℃ , 75%-40 ℃ 45%-50 ℃ , 35%-55 ℃ Vibration: random sampling 2 grams, 5-500Hz Impact: 1m free drop test Size: 195(L)×92(W)×55(H) mm...
  • Page 16 battery immediately to avoid reading error which may cause electric shock or personal injury. The calibrator uses one 9V alkaline battery (ANSI/NEDA 1604A or IEC 6LR61), if want to replace this battery, please follow below steps: 1.Press to switch off the calibrator. 2.

  • Page 17: Circuit Board

    5.4 Setting up HART model If want to enable or disable the HART model of Calibrator (Highway Addressable Remote Transducer), please operate as follows: 1.Press to switch off the calibrator and disconnect the test wire. 2. Take out the calibrator from the rubber cover. 3.

  • Page 18: Accessories Included

    5.5 Calibration It shall implement calibration on the calibrator to confirm if its function meets the specification, for details please refer to the factory. 6. Accessories included Item Description Lot No. Quantity 9V alkaline cell (ANSI /NEDA 1604A or IEC 6LR61) Test lead wire set Instruction Certification...
  • Page 19 Shenzhen Huayi Instrument Technology Co., Ltd. Address: Building 3, West Floor 9, SEG Technology Industrial Park, North Huaqiang Road, Shenzhen City (518028) Tel: 86-755-83769588 Fax: 86-755-83768150 Website: WWW.SZHYTECH.NET...

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