Keller LEO 1 User manual
LEO 1
LEO 1
Actual Pressure
Max.- / Min.-Value
Peak Value
ENTER
Max. / Min.
SELECT
G1/4”
Digital Manometer with Peak Value Detection
and Max.-/Min.-Display.
Accuracy: 0,2% FS typ.
KELLER AG St. Gallerstrasse 119 CH-8404 Winterthur Tel. 052 235 25 25 Fax 052 235 25 00
KELLER GmbH Schwarzwaldstrasse 17 D-79798 Jestetten Tel. 07745 9214 0 Fax 07745 9214 50
LEO 1 has two operating keys. The left key (SELECT) serves to se-
lect the functions and the pressure units. The right key (ENTER)
activates the selected function or pressure unit. The right key is also
used to switch between the MAX.- and MIN.-value in both the Mano-
and Peak-mode.
Turn-on: Pressing the SELECT key turns the instrument on.
The instrument subsequently displays the software
version (year/week), the full-scale pressure range,
the actual pressure (top display) and the last mea-
sured MAX.-value (bottom display).
The instrument has the following functions:
RESET: Max.-/Min.-value and Peak-value are set to the
actual pressure
OFF: Turns off the instrument
MANO: Releases the following functions:
PEAK off: Normal measuring mode with 2 measurements
per second
PEAK on: Fast measuring mode with 5000 measurements
per second
ZERO SEt: Sets a new Zero reference
ZERO rES: Sets the Zero to factory setting
CONT on: Deactivates the automatic turn-off function
CONT off: Activates the automatic turn-off function (the instrument
turns off 15 minutes after the last key function)
followed by the unit selection: bar, mbar/hPa, kPa, MPa, PSI
Example: Setting a new Zero Reference:
--> Turn on the instrument by shortly pressing the SELECT-key.
--> Wait for the instrument’s measuring mode (approx. 3 seconds).
--> Press the SELECT-key 3 times: MANO appears.
--> Press ENTER: PEAK on or PEAK off appears.
--> Press SELECT: ZERO SEt appears.
--> Press ENTER: The new Zero reference is set. The instrument
returns to the measuring mode.
2
042
P
t [ms]
50 µsec-measuring cycle
Display of the Minimum Pressure Value
When in the measuring mode (Display: Actual Pressure and Max.-
value), you may display the Min.-value for 5 seconds by shortly pres-
sing the ENTER-key.
Notes
1) The functions and units can also be called up by keeping the
SELECT-key depressed. Releasing the key enables the displayed
function or unit to be activated with the ENTER-key.
2) If the selected function or unit is not activated within 5 seconds
with the ENTER-key, LEO 1 returns to the measuring mode with-
out changing any settings.
3) Turning LEO 1 on and off does not influence any of the previous
settings.
4) If the PEAK on or CONT on function is activated, it is indicated
with a flashing sign on the display.
5) If a pressure can not be represented on the display, OFL (over-
flow) or UFL (underflow) appears on the display.
6) If the actual pressure goes beyond the measuring range, the last
valid pressure value starts flashing on the display.
Measuring Procedure of the Peak-Mode
150 µsec-signal conditioning
PEAK
max.
PEAK
min.
RESET
3
Installation
Screw the G1/4 male port of LEO 1 into the female pressure port and
tighten using the lower hexagon of the trans-
ducer. Loosen the upper hexagon and
rotate the LEO 1 to the desired
position. Retighten.
Battery Change / Battery Life
When the battery starts weakening, a low battery warning (BAT LOW)
will appear in the upper left corner of the display.
Battery change: Open the instrument (turn the display ring beyond
the limit stop). Open the battery compartment and change the battery
(type CR 2430).
The battery life is 180 hours in Peak-mode (at continuous operation)
and 1400 hours in normal measuring mode.
Ranges / Calibration
The factory setting of the Zero for the ranges -1…3 bar or -1…30 bar
is at 0 bar absolute. For sealed gauge pressure measurements,
activate “ZERO SEt” at ambient pressure.
Instruments with the ranges 0…300 bar or 0…1000 bar are calibrated
in a sealed gauge mode with 1 bar absolute pressure as a Zero refe-
rence.
The face of LEO 1 can be rotated through
355°. This feature allows the LEO 1 to be
mounted in all possible positions; vertical,
horizontal or upside down.
KELLER
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10 / 2000www.keller-druck.ch
4
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