User Manual

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67
11.HARTCommunication(onlyHARTisavailable)
11.1 Brief and note
Thecalibratorisasecondarymasterdevice,andhasnoimpactonthenormalcommunicationbetweenaprimary
masterdeviceandaHARTdevice.ThejacksofHART(refertoTable7‐1)haveabuilt‐inHARTresistor.ThisHARTresistor
isoptionalanditsratecurrentis44mA.
Note 1:The
calibratorcanmeasurecurrentonlywitharangeof‐30to30mA.Ifloopcurrent(CA)isunnecessary,you
canbypassthecurrentmeasurejacks,also,thecalibratorcanpollover15devices(address1to15)withanexternal
HARTresistor.
Note 2:TheHARTjackscanendure±50V
whenanexternalHARTresistorisbeingused.
InthecalibratorHARTmode,thecalibratorwillsupplytheseoperationsasfollows:
 SupportsHART process variables updating. The calibrator can show primary variable (PV), rang (%), PV current
value (AO), loop current (CA), thesecondary variable, the third variable, and the fourth variable.
 Thesecondary
variable,thethirdvariable,andthefourthvariablearespecialprocessvariablesdefinedbyatransmitter.
 Support HART diagnostic and service: HART diagnostic and ser vice operations will allow you to calibratea
supportedHARTinstrument.
 Support HART setup: HART setupoperations allow you to configure common parameters of a supported
HART
instrument.
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