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Summary of Contents for Comet System COMMETER C3121P
- Page 1 COMMETER C3121P Digital thermometer-hygrometer with external probe for compressed measurement Instruction manual...
- Page 2 Manual for use of thermometer-hygrometer COMMETER C3121P Instrument is designed for measurement of temperature and relative humidity with an external probe on a cable with the possibility of displaying the dew point temperature. Measured values are displayed on a dual line LCD display.
- Page 3 Dew point temperature (calculated from temperature and humidity): Range: -60 to +80 °C Resolution: 0.1 °C Accuracy: ± 1.5 °C at ambient temperature T < 25°C and RV > 30 %, for more details see graphs below. Response time with stainless steel mesh cover (air flow approximately 1 m/s): air temperature: t90 <...
- Page 4 The sensors (under the probe cover) should not be exposed to direct contact with water or other liquids. Probe should not be exposed to mechanical vibrations. Storing conditions: temperature -10 to +60 °C relative humidity 5 to 95 %RH Dimensions: 141 x 71 x 27 mm Weight including battery: approximately 150 g Material of the case: ABS Material of the probe: duralumin with the black eloxal surface finish...
- Page 5 Press DISPLAY key to display other readings - temperature in °C on upper line and dew point temperature on lower line (°C DP). Function HOLD (storing of actual measured values) and minimum a maximum memory Press HOLD key in the default mode (displaying of actual measured value) to store actual measured values to internal memory (indicated by short beep).
- Page 6 Battery voltage of partially loaded battery is displayed. This value illustrates battery condition. Display refresh mode is indicated. In the FAST mode refreshment is fastest with regular interval approximately 0.7 s. In the dynamic refresh mode (DYN.) each 15 s refresh interval of display is doubled to maximum 5 s if measured values are stable.
- Page 7 It is possible to leave the alarm setting mode by pressing MENU key. New adjusted limits up to pressing MENU key are stored in memory. After pressing ENTER key it is possible to set alarm limits for dew point temperature. Battery replacement Low battery voltage is indicated on the display with blinking reading "BAT".
- Page 8 APPENDIX A The probe for measuring the moisture of compressed air should be placed directly on the pressure pipelines to achieve higher measurement accuracy and fast response times. But they are cases where such placement is not possible. The reason is the high air speed, high temperature, high pollution, small diameter pipes, etc.
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