Delta OHM HD2107.1, Operating Manual

Page: 8 / 38

HD2107
- 8 -
V2.3
KEYBOARD AND MENU DESCRIPTION
Foreword
The instrument keyboard is composed of single-function keys, like the MENU key, and double-
function keys such as the ON-OFF/Auto-OFF key.
In the double-keys, the function in the upper part is the “main function”, while the one in the bottom
part is the “secondary function”. When the instrument is in standard measurement mode, the main
function is active. In the menu or in conjunction with the FUNC key, the secondary function is en-
abled.
The pressing of a key is accompanied by a short confirmation beep: a longer beep sounds if the
wrong key is pressed.
Each key specific function is described in detail below.
ON-OFF/Auto-OFF key
The instrument is turned on and off using the ON/OFF key. The turning on enables all display seg-
ments for a few seconds, and then the type of calibration enabled (CAL FACT = factory calibration;
CAL USER = user calibration). Then an auto-test follows, including detection of the probe con-
nected to the input, and setting the instrument ready for normal measurement.
MIN
cm
min
s
2
3
m
µ
m
k
>>> >>>
During turning on, should no probes be connected, the message "NO_PRBE_
SER_NUM" is displayed in the line for symbols for a few seconds, and in the main line
the ERR message appears.
When the probe is inserted into a functioning instrument, the "NEW_PROB_DET" (New
probe detected) message appears: as the probe's data are captured upon turning the in-
strument on, it is necessary to turn the instrument off and on again.
Replace the probes when the instrument is off.
+
Automatic turning off
The instrument has an
AutoPowerOff function that automatically turns the instrument off after about
8 minutes if no key is pressed during the intervening time. The AutoPowerOff function can be dis-
abled by holding the HOLD key pressed down during the turning on phase: the battery symbol will
blink to remind the user that the instrument can only be turned off by pressing the <ON/OFF> key.
The automatic turning off function is disabled when external power is used. On the other
hand, it cannot be disabled when the batteries are discharged.