User manual OMRON K3MA-F DATASHEET

[. . . ] Frequency/Rate Meter K3MA-F Highly Visible LCD Display with 2-color (Red and Green) LEDs · Contact, NPN, PNP, or voltage pulse input. · Includes scaling, auto-zero time, startup compensation time functions. · Finger protective cover (standard equipment) guards against electric shock. and Canadian requirements under the Component Recognition Program of UL. [. . . ] · Install surge absorbers or noise filters on nearby devices that generate noise (particularly motors, transformers, solenoids, magnet coils, and other devices that have a high inductance component). Line filter Power supply input !Caution Take safety measures, such as installing a separate monitoring system, to ensure safety even if the product fails. Product failure may prevent comparative outputs from being generated, resulting in serious accidents. Maintain the power supply voltage within the range specified in the specifications. Check each terminal for correct number and polarity before connecting it. Incorrect or reverse connections may damage or burn out internal components in the product. Provide a switch or circuit breaker so that operators can easily turn OFF the power supply when necessary. Do not use the product where flammable or combustible gases are present. Frequency /Rate Meter + Signal /Rate input Frequency Meter Power supply input - Surge absorber · To prevent inductive noise, separate the terminal block wiring for the product from high-voltage or high-current power lines. Do not route the wiring for the product in parallel with or tie it in a bundle with power lines. · When using a noise filter for the power supply, check for the voltage and current and install it as close as possible to the Frequency/ Rate Meter. · Do not install the product near radios, television sets, or wireless devices. Doing so may cause reception interference. Increasing Service Life · Do not use the product in locations where the temperature or humidity exceeds the ratings or where condensation may occur. When installing the product in a panel, be sure that the temperature around the product (not the temperature around the panel) does not exceed the ratings. To extend the product service life, lower the temperature inside the Frequency/Rate Meter. · Use and store the product within the temperature and humidity ranges given in the specifications. When gang-mounting Frequency/Rate Meters or arranging them vertically, heat generated by the Frequency/Rate Meters will cause the internal temperature to rise, reducing the service life. In such cases, consider forced cooling methods, such as using a fan to circulate air around the Frequency/Rate Meters. · The life of the output relays is greatly affected by the switching capacity and switching conditions. The contacts may fuse or burn if they are used past their electrical life. Application General Precautions 1. Do not use the product in the following locations: · Locations subject to direct radiant heat from heating equipment. · Locations subject to dust or corrosive gases (particularly sulfuric gas or ammonia gas). Do not block heat dissipation around the product, i. e. , provide sufficient space for heat dissipation. Ensure that the rated voltage is reached within two seconds after the power is turned ON. [. . . ] When setting the scaling display value, it is necessary to consider the number of digits to be displayed past the decimal point. Troubleshooting When an error occurs, error details will be displayed on the main indicator. Confirm the error from the main indicator and take the appropriate countermeasures. Level display Not lit 5 Main indicator e111 e111 Error contents RAM memory error EEPROM memory error Countermeasures Repair is necessary. When this error is displayed, press the Level Key for 3 seconds, and the settings will be restored to the factory settings. [. . . ]