February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930 Page 35
The Terminal Protocol settings are available as shown in Figure 2-17 but are only used if the sensor is set to Smart
Sensor Terminal protocol. See CHAPTER 6 for more details. This mode also opens up for a polled mode where the
sensor is pinging on the selected ping rate and outputs data when the user/system polls for data by sending a Do
Sample command to the sensor.
When Enable Polled Mode are set to ‘no’ (non-polled operation) the sensor will sample at the interval given by the
Interval property. When set to ‘yes’ the sensor will read the last measured data on request only (use the Do Sample
command). A Do Sample command triggers the end calculations and output of data. A Do Output command can be
sent to repeat the output of the last calculated data.
Enable Text is used to switch on text information in the serial output from the sensor, only in Smart Sensor Terminal
mode. Without text enabled the output string will be plain numbers for each output, see Figure 6-5.
Enable Decimalformat is used to either set decimal format or exponential format. Example of decimal format is
1023.45 and exponential format is 1.02345E+03.
2.5.3 Measurement settings
Figure 2-18: Sensor orientation settings
Ping Number is the number of ping transmitted during one recording interval. One ping is a transmitted pulse on both
axes, so one pulse on two transducers.
Polled Pingrate sets the ping frequency for sensors in polled mode. If set to 1.0 the sensor will continuously ping at
1Hz in Polled mode. For non-polled operation the sensor will not be influenced by this setting. Ping rate is then decided
by recording interval, number of ping and bust/spread mode.
Enable Burst Mode. The sensor can run in burst mode or spread mode. When burst mode is enabled the sensor
performs all ping measurements at the end of the recording interval. The instrument activates sleep mode between each
measurement, which reduces the power consumption. Power consumption in spread and burst mode is about the same.
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