This manual describes the basic operation of the GfG EC 21 transmitter. It covers the transmitter's features and operation, as well as how to perform zero point adjustment, sensitivity check, and percent of scale to mV output.
This manual provides instructions for operating and maintaining the GfG EC 21 fixed transmitter, including safety precautions, electrical connections, zero point adjustment, sensitivity calibration, and troubleshooting. It details how to connect power, adjust zero and span using test terminals, and interpret mV output for gas concentration. Technical specifications such as voltage, output signal, and environmental limits are included.
The document also covers common issues like no output or sensor failure and provides solutions, including checking wiring polarity, replacing expired sensors, and verifying calibration gas concentration.
| Output Signal | 4–20mA Linear |
|---|---|
| Dimensions | 2.625 x 5.25 x 6 in. |
| Temperature Range | -20 to 50° C |
| Relative Humidity | 15–95% rh non-condensing |
The output voltage is 200 mV, corresponding to 20 mA.
Check if the supply wires are reversed; correct polarity is required for operation.