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Summary of Contents for Dwyer Instruments Love Series HM28
- Page 1 Operating instructions Digital handheld pressure gauge HM28 GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...
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Page 2: Table Of Contents
Contents Description ........4 Safety details ........4 Operating ......... 4 Switching on and off ......4 Pneumatic connection ..... 4 Operating modes ......4 Configuration ........6 RS 232 mode ........7 Battery change ......10 Recalibration ........10 Specifications ........ -
Page 3: Operating Instructions
Operating instructions = On = Off MODE = Select operating mode - Pressure measurement - Min./Max. - Leak rate - Datalogging CLEAR/ZERO = Zero setting PRINT/HOLD = Print and freeze display START/STOP = Data recording / printing = Select config. modes SELECT = Select config. -
Page 4: Description
Description Switching off Press the OFF key, or auto- matic switching off 1,10 or 60 The „LOVE CONTROLS“ handheld pressure min after the last keystroke. gauge HM28 is a digital pressure measuring In case of a temperature change the instrument instrument with integrated pressure sensor requires at least 30 minutes to adjust to the for the measurement of differential, relative or... - Page 5 Display example Notes Switching on Max. Range: Measuring range 200 mbar displayed in desired unit Full scale error Accuracy class as a % 0.05 % of full scale reading Normal print zero 123.45 mbar Only with differential (differential) hold display ====== or or relative pressure 123.4 mbar...
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Page 6: Configuration
Configuration Select mode: Press >2 seconds on the display appears CONFIGURATION Store and exit: Press >2 seconds on the display appears SAVE CONFIGURATION Display example Notes set unit mbar, kPa, bar, UNIT O, mH mbar mmHg, psi, inH inHg, hPa, Pa, MPa RESOLUTION Display resolution, high... -
Page 7: Rs 232 Mode
RS 232 mode The answer is terminated with a CR - The checksum is formed from the least The HM28 can be remotely operated from a significant byte of the command string personal computer via an RS 232 interface. The automatic switching off (chapter 3.1) is inactive. - Page 8 GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...
- Page 9 GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...
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Page 10: Battery Change
Battery change Open battery receptacle Insert 9 V-alkali battery (IEC 6LR61) or accumulator Ensure correct polarity! Correct disposel of the used batteries according to environment regulations! Recalibration Recalibration to be carried out by specially skilled staff only. Relevant instructions see in section 8. We recommend to recalibrate the instrument at least once a year. - Page 11 Measuring rate in RS232- mode Units Measuring ranges -Class 0,2 20 measurements/s up to 7 bar 10 to 30 bar 70 bar -Class 0,1 and 0,05 10 measurements/s mbar Measuring rate, 2 ½ or normal mode 5 measurements/s Memory capacity max.
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Page 12: Measuring Ranges
Measuring ranges Metric Range English Range Max. load capacity Max. static pressure (rounded) 0 ... 2.5 kPa 0 ... 10 inH2O 12.5 inH2O 100 psid 0 ... 7 kPa 0 ... 28 inH2O inH2O 100 psid 0 ... 20 kPa 0 ... 80 inH2O inH2O 100 psid... -
Page 13: Warning Messages And Faults
Warning messages and faults Fault/indication Possible cause Remedy 10% exceeding or under- Apply permissible measuring ERROR running of measuring range pressure OUT OF RANGE CHANGE BATTERY Battery voltage too low Insert new battery No change in Over pressure applied to Dispatch instrument for repair measurement pressuresensor... -
Page 14: Calibration Instructions
acceptable values acquired. In the Calibration instructions event of a maloperation, the calibration process is interrupted and the previous Recalibration to be carried out by calibration data are retained. specially skilled staff only! Actuate the following key combinations: • First press MODE and keep it An incorrect internal instrument tempera- ture can lead to accuracy fluctuations! pressed... - Page 15 GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...
- Page 16 LOVE CONTROLS Division Dwyer Instruments, Inc. Highway 212 AT 12 Michigan City, IN 46360 Phone ++1 219 879 8868 ++1 219 872 9057 GlobalTestSupply www. .com nd Quality Products Online at: sales@GlobalTestSupply.co...
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