Lutron Electronics GCH-2018 Operation Manual
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Lutron Electronics GCH-2018 Operation Manual

Carbon dioxide + humidity, temperature co meter
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Carbon dioxide + Humidity, Temperature
CO METER
Model : GCH-2018
Your purchase of this CO2 METER marks a step forward for you
into the field of precision measurement. Although this CO2 is a
complex and delicate instrument, its durable structure developed.
Please read the following instructions carefully and always keep
this manual within easy reach.
OPERATION MANUAL

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Summary of Contents for Lutron Electronics GCH-2018

  • Page 1 Carbon dioxide + Humidity, Temperature CO METER Model : GCH-2018 Your purchase of this CO2 METER marks a step forward for you into the field of precision measurement. Although this CO2 is a complex and delicate instrument, its durable structure developed.
  • Page 2 TABLE OF CONTENTS 1. FEATURES...............1 2. SPECIFICATIONS............. 1 3. FRONT PANEL DESCRIPTION........... 5 3-1 Display..............5 3-2 Power Button.............5 3-3 Hold Button ( Esc Button ).......... 5 3-4 REC Button ( Enter Button )........5 3-5 Set Button ( Button )..........▲...

  • Page 3: Specifications

    1. FEATURES NDIR method principal for CO2 ( Carbon dioxide ) measurement, available for long term operation. High repeatability and high accuracy. Two probes, one is for CO2/Temp. measurement, the other probe is for Humidity/Temp./Dew point measurement. Separate probe, easy operation and convenient for remote measurement.
  • Page 4 Unit Humidity % RH Dew point ℃ ℉ Temp. ℃ ℉ CO2 : Response Time < 2 min. typically. * Reach the 63% reading value * Depend the environment air circulation. Humidity/Dew point : 10 to 30 seconds typically. * Reach the 85% reading value * Depend the environment air circulation.
  • Page 5 Probes no. Two probes : * Probe 1 is for CO2, Temp. measurement. * Probe 2 is for Humidity, Dew point. Temp. measurement. Operating 0 to 50 ℃ Temperature Operating Main instrument : Less than 85% R.H. Humidity C02 probe : Less than 85% R.H. Humidity probe : 0 to 95 %RH.
  • Page 6 2-2 Electrical Specifications (23± 5 ℃ CO2 ( Carbon dioxide ) Range 0 to 4,000 ppm Resolution 1 ppm ( Carbon Accuracy ± 40 ppm dioxide ) 1,000 ppm. ≦ ± 5% of reading * > 1,000 ppm 3,000 ppm. ≦...

  • Page 7: Front Panel Description

    Dew Point Range -25.3 to 48.9 ℃ ℃ ℃ Resolution 0.1 ℃ Range -13.5 to 120.1 ℉ ℉ ℉ Resolution ℉ Remark : * Dew Point display value is calculated from the Humidity/Temp. measurement automatically. * The Dew Point accuracy is sum accuracy value of Humidity &...
  • Page 8 3-1 Display 3-2 Power Button 3-3 Hold Button ( Esc Button ) 3-4 REC Button ( Enter Button ) 3-5 Set Button ( Button ) ▲ 3-6 Alarm/Dew point Button ( Button ) ▼ 3-7 Battery Compartment/Cover 3-8 Stand 3-9 Input socket 3-10 RS-232 Output Terminal 3-11 DC 9V Power Adapter Input Socket 3-12 Reset button...

  • Page 9: Measuring Procedure

    4. MEASURING PROCEDURE 4-1 CO2 measurement 1)Plug the " CO2 Probe Plug " ( 3-15, Fig. 1 ) into the " Probe Input Socket " ( 3-9, Fig. 1 ). 2)Power on the meter by pressing the " Power Button " ( 3-2, Fig.
  • Page 10 b. Dew point measurement The procedures of " Dew point measurement " are same as the above " a. Humidity/Temp. measurement " except press the " Dew point Button " ( 3-6, Fig. 1 ) once, the lower LCD will show the indicator " DEW " & and the Dew point value along the unit.

  • Page 11: Advanced Setting

    4-5 Data Record ( Max., Min. reading ) * The data record function records the maximum and minimum readings. Press the " REC Button " ( 3-4, Fig. 1 ) once to start the Data Record function and there will be a " REC. " symbol on the display. * With the "...
  • Page 12 Press the " Set Button " ( 3-5, Fig. 1 ) continuously at least two seconds will enter the " Advanced Setting ", then press the " Set Button " ( 3-5, Fig. 1 ) once a while in sequence to select the four main function, the lower display will show : PoFF..
  • Page 13 5-2 Change the Temp unit ℃ ℉ When the lower display show " t-CF " : 1)Press the " Enter Button " ( 3-4, Fig. 1 ) once, the upper display will show " 0 ", use the " Button " ( 3-5, Fig. ▲...

  • Page 14: Rs232 Pc Serial Interface

    5-4 Setting the CO2 Altitude ( Height ) value For precision measurement, it recommend to set the meter's environment altitude ( height ) value for the compensation. When the lower display show " ALt " : 1)Press the " Enter Button " ( 3-4, Fig. 1 ) once, the upper display will show the setting "...
  • Page 15 The 16 digits data stream will be displayed in the following format : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Each digit indicates the following status : Start Word = 02 When send the upper display data = 1 When send the lower display data = 2 D12 &...

  • Page 16: Battery Replacement

    7. BATTERY REPLACEMENT 1)When the left corner of LCD display show " ", it is necessary to replace the battery. However, in-spec. measurement may still be made for several hours after low battery indicator appears before the instrument become inaccurate. 2)Slide the "...
  • Page 17 9. ANNEX The follow CO2 value are for the requirement for different environment, however it is for reference only. Building, office, home 1,000 PPM ≦ School 1,500 PPM ≦ Hotel, public area 1,500 PPM ≦ Indoor swimming pool 1,500 PPM ≦...

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