Yacht Devices YDTA-04N, Руководство пользователя

Страница: 13 / 40

— 13 —
1.3.3 Neutralize gauge effects
When using an Adapter with an existing gauge, you will need to measure its coil resistance values with an
ohmmeter or multimeter and set the measured values to the configuration with the command YD:OHMS_
GAUGE (refer to Sections VI.3.3).
To make an accurate measurement, you will need to warm up your gauge: turn it on and let it operate for
approx. 15 minutes. When you are ready, promptly disconnect the gauge and measure the COIL 1 resistance
— between the gauge reference voltage source (+12V) input and sensor «signal» input. For a 2-coil gauge,
you should also measure the COIL 2 resistance — between the gauge «signal» input and gauge «ground»
input. To increase accuracy, make several measurements and take the average value.
1.4 Connection to a voltage-output sensor
Check your voltage-output sensor specifications, it should support output of an analog voltage signal in the
range of 0 – 16 Volts. Configure the sensor to activate this output mode if necessary. Connect the SENS
terminal to the «Voltage» output of the sensor and the GND terminal to «Ground» or «−» of the sensor.
If you have a sensor with an additional reference voltage output, connect it with VREF terminal, this will
increase the measurement accuracy. Otherwise, the VREF terminal should be left unconnected. You should
also configure the channel and set the CONNECTION setting to VOLTAGE and configure voltage settings
(refer to Section VI.3).
1.5 Parasitic sensor wire resistance compensation
If you connect the Device directly to a fluid level sensor, but the wire which connects the fluid level sensor
to a «Signal» input of an analog gauge is too long, it may add an additional fixed value to the gauge coil
resistance, which can cause a persistent measurement error. If the total sensor wire length is greater
than 5 meters, it is recommended to measure the resistance with an ohmmeter or multimeter and set the
measured value in the channel’s configuration parameter OHMS_WIRES (refer to Section VI.3.4).