Chapter II
30 Portable digital multimeter
4.7. SURV key
If you press this key (long press), you access the surveillance mode (or coming out), in which
minimum (MIN), maximum (MAX) and sliding average (AVG) values of the current measurement
are stored.
You can look up each of these values by repeatedly pressing the same key (short press). The
symbols MIN, MAX or AVG flicker with the selected value.
) Note When entering in the SURV mode, non-coherent values may be displayed.
4.8. Hz key
When the current positions are V
AC
, V
DC
, mV, mA and 10 A, the Hz key invokes, in turn :
- frequency measurement,
- positive duty cycle measurement (% +) and negative one (% -).
A long press on Hz key allows a direct selection of the voltage or current function.
4.9. PRINT key
This key operates with optional interface accessory for printer or PC.
Short press : activates / deactivates «send measures to printer» mode at the rate defined
by the user.
Long press : adjusts the rate varying from 00000 sec (a single transmission) up to 9h
59min 59s, using the SEL/ON key (selection of digits) and the range key
(increment the selected digit).
4.10. key
Activates / deactivates back lighting of the display unit.
It automatically goes off after about 30 seconds.
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