LEO 30 pages

Intelligent Transmitter with Digital Indication
bus-capable
LEO 3
/ programmable 4…20 ma output
LEO 3 is a micro-processor based transmitter with digital double-display for pressure (top
display) and for the output signal (bottom display). The display is powered from the 4…20 mA
current loop.
The following functions can be executed with the front keys:
MaX/MINt
Activating the right key brings the Max.- and Min.-values to the lower display. After
5 seconds, the analog signal is indicated again.
Resett
With RESET, the Max.- and Min.-values are set to actual.
Zero SETt
The zero is set to the applied pressure.
Zero ReSt
Restores the instrument back to factory settings.
Unitst
The pressure values can be displayed in the following units:
bar, mbar/ hPa, kPa, MPa, PSI, kp/cm2.
Programming the analog output via the front keys
OUTP SETTt This sub-menu is used to configure the analog output within the compensated
range. The functions can only be accessed by entering a code.
ZEROt
Executing ZERO when pressure is applied sets the analog output to 4 mA.
FSt
Executing FS when pressure is applied sets the analog output to 20 mA.
FACT SETTt The analog output is set back to factory settings.
Programming by PC
The communication with the BUS-capable instrument takes place with the KELLER READ30/
PROG30 software and a KELLER converter (K104B, K107,…) via the RS 485 interface, allowing
to read out the pressure values and the instrument characteristics. The analog output can be
programmed without applying pressure to the instrument.
Optional accessories: t - Protective rubber covering
- Carrying bag
Plug Assignment
SpeCifiCationS
Pressure Ranges, Resolution:tt
Ranget
Resolution
0…4 bar abs.t
0…30 bar abs.t
0…300 bart
0…700 bart
0…1000 bart
1 mbar
10 mbar
100 mbar
200 mbar
200 mbar
PAAt
PAAt
PAt
PAt
PAt
Accuracy RT (room temperature) *t
Total Error Band (0…50 °C)t
Storage Temperaturet
Compensated Temperature Ranget
Supplyt
Outputt
Measuring Rate t
Display Ratet
Pressure Connectiont
Electrical Connectiont
Protection, CEI 529t
Diameter x Height x Deptht
Weightt
< 0,1 %FS
< 0,2 %FS
-10…60 °Ct
0…50 °C
8…28 VDC
4…20 mA (2 wire) / RS 485
up to 90 times/sec.
2 times/sec.
G1/4”
Binder 723t (back entry)
IP65
76 x 125 x 50 mm
≈ 210 g
OutputtFunction t
Binder
723
4…20 mAt OUT /GNDt
1
(2 wire)t
+Vcct
3
Interfacet
RS485At
4
RS485Bt
5
* Including linearity, repeatability and hysteresis.
Subject to alterations
07/07
KELLER AG für Druckmesstechnikt
St. Gallerstrasse 119t
CH-8404 Winterthurt
Tel. +41 (0)52 - 235 25 25t
Fax +41 (0)52 - 235 25 00
KELLER Ges. für Druckmesstechnik mbHt
Schwarzwaldstrasse 17t
D-79798 Jestettent
Tel. +49 (0)7745 - 9214 - 0t
Fax +49 (0)7745 - 9214 - 60
Companies approved to ISO 9001:2000
www.keller-druck.com