HT instruments HT8051 - Manual (Page 7)

HT8051
EN - 6
4.2. DESCRIPTION OF FUNCTION KEYS AND INITIAL SETTINGS
4.2.1.
key
Pressing this key turns on and off the instrument. The last selected function is indicated on
the display.
4.2.2. 0-100%
key
In operating modes SOUR mA (see § 4.3.4), SIMU mA (see § 4.3.6), OUT V and OUT mV
(see § 4.3.2) pressing this key allows quickly setting the initial (0mA or 4mA) and final
(20mA) values of the output generated current, the initial (0.00mV) and final (100.00mV)
values and the initial (0.000V) and final (10.000V) values of the output generated voltage.
The percentage values “0.0%” and “100%” appear on the secondary display. The
displayed value can always be modified by using the adjuster (see § 4.2.6). The “0%” and
“100%” indication are shown at display.
CAUTION
The instrument CANNOT be used for managing measurements
(MEASURE) and signal generation (SOURCE) at the same time.
4.2.3. 25%/
key
In operating modes SOUR mA (see § 4.3.4) and SIMU mA (see § 4.3.6), OUT V and OUT
mV (see § 4.3.2), pressing this key allows quickly increasing/decreasing the value of the
generated output current/voltage in steps of 25% (0%, 25%, 50%, 75%, 100%) in the
selected measuring range. In particular, the following values are available:
 Range 0  20mA  0.000mA, 5.000mA, 10.000mA, 15.000mA, 20.000mA
 Range 4  20mA  4.000mA, 8.000mA, 12.000mA, 16.000mA, 20.000mA
 Range 0  10V  0.000V, 2.500V, 5.000V, 7.500V, 10.000V
 Range 0  100mV  0.00mV, 25.00mV, 50.00mV, 75.00mV, 100.00mV
The percentage values are shown on the secondary display and the displayed value can
always be modified by using the adjuster knob (see § 4.3.6). The “25%” indication is
shown at display.
Press and hold the 25%/
key for a 3 seconds to activate display backlighting. The
function deactivates automatically after approx. 20 seconds.
4.2.4. MODE
key
Repeatedly pressing this key allows selecting the operating modes available in the
instrument. In particular, following options are available:
 OUT SOUR mA  generation of output current up to 24mA (see § 4.3.4).
 OUT SIMU mA  simulation of a transducer in a current loop with auxiliary power
supply (see § 4.3.6)
 OUT V  generation of output voltage up to 10V (see § 4.3.2)
 OUT mV  generation of output voltage up to 100mV (see § 4.3.2)
 MEAS V  measurement of DC voltage (max 10V) (see § 4.3.1)
 MEAS mV  measurement of DC voltage (max 100mV) (see § 4.3.1)
 MEAS mA  measurement of DC current (max 24mA) (see § 4.3.3).
 MEAS LOOP mA  measurement of output DC current from external transducers
(see § 4.3.5).