Configuration Issue for SNMP Float Variable

Setup, Configuration and Use Beginners
3 
Thing snmp:target:Diskstation "Synology Diskstation (SNMP)"[ hostname="192.168.0.10", protocol="v2c"] {
    Channels: 
Type string : UPS_Load                   [oid=".1.3.6.1.4.1.6574.4.2.12.1.0", mode="READ", datatype="FLOAT"]
}