Relative Mode; Display Backlight; Hold; Peak Hold - PCE Instruments PCE-ITM 20 User Manual

3.18

Relative Mode

The relative measurement feature allows you to make measurements relative to a stored
reference value. A reference voltage, current, etc. can be stored and measurements made in
comparison to that value. The displayed value is the difference between the reference value and
the measured value. Note: Relative mode does not operate in the 4-20mA function.
1. Perform the measurement as described in the operating instructions.
2. Press the REL button to store the reading in the display and the "REL" indicator will appear on
the display.
3. Left auxiliary display displays the margin of initial value and the current value. Right auxiliary
display displays the initial reading. Main display the reading after REL TEST.
4. Press the EXIT button to exit the relative mode.
3.19

Display Backlight

Press the key to turn the backlight on. The backlight will automatically turn off after SET time.
Press the EXIT button to exit the backlight on mode.
3.20

HOLD

The hold function freezes the reading in the display. Press the HOLD key momentarily to activate
or to exit the HOLD function.
3.21

PEAK HOLD

The Peak Hold function captures the peak AC or DC voltage or current. The meter can capture
negative or positive peaks as fast as 1 millisecond in duration. Momentarily press the PEAK
button, "PEAK" and "MAX" will display in left auxiliary display. MIN" will display in right auxiliary
display. The meter will update the display each time a lower negative peak occurs. Press the
EXIT button to exit the PEAK HOLD mode. Auto Power Off feature will be disabled automatically
in this mode.
3.22

Data Record (Store/Recall)

1. STORE function
In the current testing mode, press STORE button one time, enter into STORE function. On the
left upper corner of LCD shows NO XXXX., which states current storage serial number. Then,
press button PEAKHOLD to change into the initial serial number 0000. (Press again it will change
back). On the right upper corner of LCD shows XXXX, which states how many current storage is
used. Press STORE button again, enter into recording interval time set up function. On the left
upper shows 0000 S, which states recording interval time; using button + & - to select, the range
is 0~255 seconds. When the recording interval time is 0000 S, then press STORE button again
to change into manual recording. Press the STORE button again to record once. When the
recording interval time is 1~255 S, then press STORE button again to start recording automatically
from 0000. Recording times is showed on the left upper corner, data is showed on the right upper
corner (Due to digital limitation, there is only display preceding four numbers) To finish above
STORE function, press EXIT button shortly. If you expect to clear all memory data: While power
on, hold EXIT button, and switch from OFF to random and then release EXIT button, the LCD will
flash thrice and buzzer thrice too, which means all memory data is cleared.
© PCE Instruments
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