HT instruments HT8051 - Manual (Page 14)

HT8051
EN - 13
4.3.6. Simulation of a transducer
CAUTION
 In this mode, the instrument provides an adjustable output current up to
24mADC. It is necessary to provide an external power supply with voltage
between 12V and 28V in order to adjust current
 With set value  0.004mA the display blink intermittently to indicate no
signal generation when the instrument is not connected to external device
Fig. 8: Simulation of a transducer
1. Press the MODE key and select the measuring mode SIMU mA. Symbols “OUT” and
“SOUR” appear on the display.
2. Define a measuring range of current between 0-20mA and 4-20mA (see § 4.2.7).
3. Use the adjuster knob (see § 4.2.6), the 0-100% key (see § 4.2.2) or the 25%/
key
(see § 4.2.3) to set the desired value of output current. The maximum value available is
24mA. Please consider that -25% = 0mA, 0% = 4mA, 100% = 20mA and 125% =
24mA. The display shows the value of current. If necessary, use the
key (see §
4.2.5) to generate DC current with automatic ramp.
4. Insert the green cable into input lead mV/V and the black cable into input lead COM.
5. Position the green lead and the black lead respectively in the points with positive
potential of the external source and positive potential of the external measuring device
(e.g.: multimeter – see Fig. 8)
6. To generate a negative current value, turn the measuring leads in the opposite
direction with respect to the connection in Fig. 8