current value //Displayed In percentage form
-22.000mA //162.50%
0.000mA // 25.00%
4.000mA // 0.00%
20.000mA // 100.00%
22.000mA // 112.50%
2.8. Measuring loop-circuit current
The function may measure current value powered with 24VDC constant voltage. 24V loop-circuit measurement function
may test transmitter loop circuit. The meter may be connected to transmitter, but not to transmitter or signal adaptor.
Warning
Typical value of loop power supply is 24VDC. Voltage between terminals could be higher than 24V in different situations,
such as current value in loop circuit or internal connection in series.
•
Turn the rotary switch to “””, and the screen displays “ LOOP POWER”;
•
Insert black probe into “mA”” terminal ,and insert red probe into “+LOOP” terminal;
•
Connect the probes to the circuit under test and then read the measured value when stable.
•
Press ”mA%” button to display current value in percentage form.
2.9. Measuring loop-circuit current with 250Ω
•
Turn the rotary switch to “”, and the screen displays “ LOOP POWER” and “250Ω HART”.
•
Insert black probe into “mA”” terminal ,and insert red probe into “+LOOP” terminal;
•
Connect the probes to the circuit under test and then read the measured value when stable.
•
Press ”mA%” button to display current value in percentage form.
2.10. Using current output function
The meter offers 0-20 mA and 4-20mA current output functions. Two output modes: SOURCE mode: supply current
from internal source; SIMULATE mode (simulate): absorb current from external source Two Configuration modes:
Constant current output: constant output of designated current. Manual-step output: output current increases or decreases
in 25% or 100% step. If you need to apply current for non-source circuit (such as loop current without power), then select
SOURCE mode. The meter consumes more battery power of being used as current source than that of being used in
SIMULATE mode, so select SIMULATE mode if possible.
Warning
Do not apply output terminals with voltage higher than 30V; otherwise it may lead to electric shocks. Make sure that the
voltage between circuit and ground wire is lower than 30V. Be sure to use the enclosed probes and wires (check them to
see whether they in a suitable measurement mode).
Warning
