User manual

Model: EC-GOLD Dual

ECGOLDDUALUM12.doc Rev: 1.2

3. Zero Calibration only needs to be done when installing a new sensor. Press <MENU>

key to bypass Zero Calibration, and go to step 6 to start second point calibration. If a

Zero Calibration is required, follow the steps 4-5.

4. Press <SELECT> key, the LCD display:

5. Make sure the ambient air around the sensor is clean ie. it has no traces of the gas

being monitored. In applications where the ambient air is not guaranteed to be clean,

use a compressed air calibration canister and apply the air to the sensor hole (EC1). For

the Zero point, the mv values should be less then 100 mv. If the mv value is changing

within 5 mv for a minimum of 10 seconds, the instrument will automatically accept the

Zero calibration. Or press <SELECT> key and finish the first point (Zero) calibration.

6. The LCD now displays the following and the instrument is ready for the second point

calibration.

7. Press <SELECT> key to start the second point calibration, and the LCD displays the

following. Press <SELECT> key to move the cursor and accept the second point

calibration. If want to change gas concentration value, press <SELECT> key to move the

cursor to proper position and press <MENU> key to increase up to the right value. Press

<SELECT> key to accept the gas concentration value.

8. After selecting gas concentration value, the LCD displays the following and the

instrument is ready for the second calibration:

9. Apply the Gas in the sensor hole (EC1). EC1 is for Carbon Monoxide; EC2 is for other

types of gas, such as NO2. Start gassing the sensor by opening the valve on the

canister. The flow rate is set to 0.5 Lpm (or ~1 SCFH (Standard Cubic Foot per Hour).

Wait about 90 seconds. After this, if the mv value is changing within 5 mv for a minimum

of 10 seconds, the instrument will automatically accept the second point. Or press

<SELECT> key to manually accept the second point. If the calibration was successful,

the LCD displays the following. Otherwise, the LCD displays the calibration error

message.

10. The “Cal OK” or “Error Message” only displays a couple of seconds, then the LCD

displays the following alarm 1 setting value:

11. Press <MENU> key to bypass the Alarm value setting menu, until the following Sensor

Selection Menu shows up:

Z xx

mv xx

#1: CO

2nd Pt.

#1: CO

S 200

S xxx

mv xxx

#1: CO

Cal OK

#1: CO



S stands for second point