HT instruments HT9021 - Manual (Page 8)

HT9021
EN - 7
4.2. FUNCTION KEY DESCRIPTION
4.2.1. H key
By pushing “H” key the parameter measured value is frozen on the display and the symbol
”HOLD” appears on it.
This mode is disabled by pushing “H” key or moving the rotary switch.
4.2.2.
key
Keep pressed the “H” key for the backlight activation. This light could help the operator
reading the display while he’s measuring in dark sites. For sake of battery saving after 10
seconds the light is automiatically switched off.
4.2.3. MODE key
By pushing MODE key the selection of double measured functions which are present at
display is possible. In particular this key is active in
Ω
CAP
position to select among
resistance test, diode test, continuity test and capacitance test, and in Temp position to
select between °C and °F in temperature test and in 60A , 600A ,1000A position to
select between AC or DC current measurements
4.2.4. MAX/MIN key
By pushing MAX/MIN key the parameter maximum and minimum values are measured.
Both values are stored in memory and they can be shown cyclically when pressing “MIN
MAX” key. The display shows the symbol linked to the selected function: “MAX” for
maximum value, the symbol “MIN” for minimum value.
This mode is activated on each measurement except for continuity test, diode test
capacitance test, frequency test and duty cycle test
This mode is disabled keeping pressed MAX/MIN key or moving the rotary switch.
4.2.5. Hz% key
With rotary switch on , 60A , 600A and 1000A positions, the Hz% key permits to
select the frequency test (Hz) or the duty cycle test (%)
4.2.6. PEAK/REL key
With rotary switch on , , CAP and DC current the PEAK/REL key permits to perform
the zeroing of value at display and a relative measurement of the parameter under test.
By pushing PEAK/REL key the instrument takes the actual parameter’s value as on offset
and performs a relative measurement. The relative value is displayed, it’s calculated as
actual value – offset value, the “REL” symbol is shown at display and the bargraph is
disabled.
This mode is disabled for resistance test, continuity test, AC current test, temperature test,
frequency test, duty cycle test and diode test and with MAX/MIN mode activated. This
mode is disabled pressing PEAK/REL key or moving the rotary switch
With rotary switch on 60A , 600A or 1000A positions the PEAK/REL key permits to
activated the maximum peak measurement of AC current (calculated with response time
<10ms). The “
P ” symbol is shown at display and the value is continuously updated by the
meter.
This mode is disabled pressing PEAK/REL key or moving the rotary switch