DENT Instruments ELITEpro XC Operator's Manual page 25

NOTE: The ELITEpro XC™ can measure input voltages up to 30.0 volts. The polarity protection circuitry
however can only withstand 15 volts of reverse applied polarity without permanent damage to the
meter. The maximum allowable current flowing into the analog input terminal is 23 mA.
CAUTION: ENSURE THAT THE SENSOR CURRENT/VOLTAGE ARE WITHIN RANGE AND THE CHANNEL
IS CORRECTLY CONFIGURED USING ELOG 14 BEFORE CONNECTING EXTERNAL SENSORS. SUSTAINED
EXPOSURE TO ELEVATED SIGNALS MAY DAMAGE THE ELITEpro XC™ AND THIS WILL VOID YOUR
WARRANTY.
CAUTION: OBSERVE THE CORRECT SIGNAL POLARITY WHEN CONNECTING VOLTAGE SENSORS TO
THE ELITEpro XC™ ABOVE 10 VOLTS. DAMAGING CURRENTS MAY FLOW FROM THE CONNECTED
SENSOR IN THE EVENT OF REVERSE POLARITY OR MISCONFIGURATION AND THIS WILL VOID YOUR
WARRANTY.
Channel types (voltage or current) should be configured using the ELOG software prior to connecting
external sensors. This sequence will prevent the unexpected/unpredictable combinations of voltage
transducers connected to low impedance loads (499 ohm) or current transducers with an open circuit.
The first set of Sensor and Output fields on the screen represent the Physical Range. This is where the
user enters the low and high process values from the sensor. This data can typically be found on the
data plate or data sheet of the sensor (typical sensor image below). The second set of Sensor and
Output fields represent the Electrical Output. This is where the user enters the minimum and maximum
electrical output values of the sensor, also listed on the data plate or data sheet.
Current Loop Connection
Sensors using current loops are widely used in industry to communicate analog signals in the presence
of electromagnetic interference. Both 2- and 3-wire current loops (often referred to as loop powered or
separately excited, respectively) are commonly used in industry. Both types of current sensors are
illustrated in this section. Internally, the ELITEpro XC™ uses 0.1% precision 499 ohm resistors to measure
the voltage drop impressed by the external current source. Current loop sensors will typically be
Shop for Dent products online at:
Example Sensor Data Plates
25
PowerMeterStore
www.
1.877.766.5412
.com