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HHT21A
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Related Manuals for Omega HHT21A
Summary of Contents for Omega HHT21A
- Page 1 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop online at www.omega.com TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors...
- Page 2 Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification.
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Page 3: Safeguards And Precautions
The socket on the front of the instrument is for use with a remote charger. Only use model R-5 (115 Vac) or R-6 (230 Vac) rechargers to charge the instrument. The HHT21A has a laser beam light source. Do not view the laser beam directly as it could be hazardous to the eyes. - Page 4 Fourteen to sixteen hours is required for a complete recharge. When the battery voltage in the HHT21A is getting low, the display will blink “LO BAT” to indicate that the batteries need to be replaced.
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Page 5: Calibration And Self-Test
Optional Remote Sensor (HHT20-ROS) CALIBRATION AND SELF-TEST The HHT21A SERIES is a crystal controlled digital instrument that requires no calibration. However, the accuracy of the instrument can be checked at any time by aiming it at an old style fluorescent light and observing 7200 ±2 RPM. -
Page 6: Operation
When the trigger is released, the HHT21A will hold the last measurement taken and display it for up 90 seconds. On very small shafts, the HHT21A will work down to a reflective tape size of approximately 1/8 inch [3.2 mm] square. However, with this small tape size, it would be necessary to operate the instrument very close to the rotating shaft and insure it is held steady.