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Summary of Contents for Comet Commeter C3121
- Page 1 Instruction manual Commeter C3121 Digital thermometer-hygrometer with external probe...
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Page 2: Table Of Contents
Table of contents GENERAL DESCRIPTION ......................3 TECHNICAL PARAMETERS ......................4 Measured and calculated values .................... 4 General ..........................5 Operation conditions ......................6 Dimensions ..........................7 OPERATION OF THE DEVICE ....................... 8 Switching ON and OFF the device ..................8 Displaying of actual measured values .................. -
Page 3: General Description
General description 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. Temperature is measured by RTD sensor Ni1000/6180ppm. -
Page 4: Technical Parameters
Technical parameters Measured and calculated values Temperature: -30 to +105 °C Measuring range: 0.1 °C Resolution: ±0.4 °C Accuracy: Response time t90 < 3 min with plastic sensor cover without filter t90 < 8,5 min with plastic sensor cover with stainless filter _____________________________________________________________________________________________________________________ Air flow approximately 1m/s, temperature step 20 °C Relative humidity:... -
Page 5: General
General Power: Battery 9V or ac/dc adapter 12 V with NiMH accumulator 9V _____________________________________________________________________________________________________________________________________________________________ If instrument is supplied from external ac/dc adapter, internal 9V battery should be replaced with rechargeable NiMH accumulator. In usual operation from adapter accumulator is charged only with small current. If accumulator is totally discharged, its full charging in instrument takes approximately 100 hours. -
Page 6: Operation Conditions
Dimensions: 141 x 71 x 27 mm Weight: Approximately 150 g including battery without probe Operation conditions Ambient temperature operating range: -10 to +60 °C, device -30 to +105 °C, probe Ambient rel. humidity operating range: 5 to 95 %RH (no condensation), device 0 to 100 %RH, probe Temperature and rel. -
Page 7: Dimensions
Dimensions IE-COM-C3121-12... -
Page 8: Operation Of The Device
Operation of the device Switching ON and OFF the device Connect the external probe to the connector before switching ON the instrument. Probe is calibrated with the delivered instrument and it is not possible to replace it with another (if you have several instruments of this type). -
Page 9: Function Hold (Storing Of Actual Measured Values) And Minimum A Maximum Memory
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). Anytime it is possible to display stored values from MENU (see below). - Page 10 Clearing of minimum and maximum memory of all values. Memory is cleared after pressing ENTER key. Clearing is confirmed by reading YES on the LCD lower display. Press ENTER key to display values stored in the HOLD memory. Press DISPLAY key to display other stored values. Press ENTER key to leave this mode.
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Page 11: Alarm Indication And Setting
Alarm indication and setting It is possible to set lower and upper limit for each measured quantity. Breaking of the limit is indicated by blinking of the appropriate value on the display. If a new alarm was indicated (i.e. it was not active in the previous measurement), display starts to display the value out of limits. -
Page 12: Battery Replacement
Battery replacement Low battery voltage is indicated on the display with blinking reading "BAT". It is necessary to replace it with new one as soon as possible. Battery is located under small cover on the instrument lower side. It is absolutely necessary to replace battery with instrument switched OFF, otherwise setting of d.REF.
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