A system for performing a site survey using two multimeters that are each an industrial wireless multimeter, the system comprising a first apparatus arranged as a first multimeter and a second apparatus arranged as a second multimeter, the first apparatus comprising: a tablet computing device having a display and configured to establish WiFi and BLUETOOTH Low Energy communication links with other devices; and a radio module physically fastened to the tablet computing device and configured to establish ISA100 and WirelessHART communication links with field devices of a process control and automation system, wherein the tablet computing device and the radio module are configured to communicate with each other using a BLE communication link, wherein the first apparatus is configured to selectably operate in multiple modes comprising a gateway mode, a router mode, a sniffer mode, and a discovery mode, and when performing a site survey the first apparatus is operating in gateway mode and the second apparatus is operating in router mode, wherein the site survey is a site survey of a site of a network comprising said field devices and at least one access point and, to perform said site survey, the first apparatus is positioned at a location of one of said at least one access point and is configured to wirelessly communicate with the second apparatus to send live data to the second apparatus; wherein the second apparatus (150a, 150b) is moved to the remote location where one of the field devices is to be placed and is configured to join the network, and, after joining the network, the second apparatus (150a, 150b) is configured to receive said live data and to display an information of a strength of wireless signals at the remote location based on the live data received from the first apparatus. a tablet computing device having a display and configured to establish WiFi and BLUETOOTH Low Energy communication links with other devices; and a radio module physically fastened to the tablet computing device and configured to establish ISA100 and WirelessHART communication links with field devices of a process control and automation system, wherein the tablet computing device and the radio module are configured to communicate with each other using a BLE communication link, wherein the first apparatus is configured to selectably operate in multiple modes comprising a gateway mode, a router mode, a sniffer mode, and a discovery mode, and when performing a site survey the first apparatus is operating in gateway mode and the second apparatus is operating in router mode, wherein the site survey is a site survey of a site of a network comprising said field devices and at least one access point and, to perform said site survey, the first apparatus is positioned at a location of one of said at least one access point and is configured to wirelessly communicate with the second apparatus to send live data to the second apparatus; wherein the second apparatus (150a, 150b) is moved to the remote location where one of the field devices is to be placed and is configured to join the network, and, after joining the network, the second apparatus (150a, 150b) is configured to receive said live data and to display an information of a strength of wireless signals at the remote location based on the live data received from the first apparatus.