Series 36 X W0 pages
Highly Precise Level Pressure Transmitters
digitally compensated
Series 36 X W
/ rangeable / digital and analog output
These pressure transmitters are designed for level measurements where the highest accuracy
is required.
Digital Output of Transmitter
This Series is based on the stable, piezoresisitive transducer and a micro-processor electronics
with integrated 16 bit A/D converter. Temperature dependencies and non-linearities of the
sensor are mathematically compensated. With the READ30 software and the KELLER cable
K-107, the calculated pressure can be displayed on a Palmtop, Laptop or PC. The READ30
software also allows the recording of pressure signals and the graphic display on the PC. Up
to 128 transmitters can be hooked together to a Bus-system.
Transmitter with Analog Output
The micro-processor integrates a D/A converter of 16 bit for analog signal outputs of 4…20 mA
or 0…10 V. The output rate is 100 Hz (adjustable). The digital output is available on all
transmitters with analog output.
Programming
With the KELLER software READ30 and PROG30, a RS485 converter (i.e. K-102, K-104 or
K-107 from KELLER) and a PC (Laptop), the pressure can be displayed, the units changed, a new
gain or zero set. The analog output can be set to any range within the compensated range.
The level transmitters are available in two different versions:
• PAA-36 X Wt
Absolute Pressure, Zero at Vacuum
This probe is applied when the atmospheric pressure is measured by a separate barometer
and when the water level is calculated as the difference between the absolute value and the
ambient pressure.
• PR-36 X Wt
Relative Pressure, Zero at ambient Pressure
This probe is fitted with durable cable with an integral vent tube to the atmosphere.
These level transmitters can be subject to internal condensation caused by installations in
cold water on warm, humid days. If the reference tube is not terminated in a warm, dry
enclosure, KELLER recommends the use of a purpose built cartridge filled with a silica gel
which is fitted at the end of the reference tube.
Electrical Connections
Output
Black
GND
White
3-wire
OUT
Red
+Vcc
Black
Program-
RS485A
Blue
ming
ø 22
White
+Vcc
0…10 V
Mark of diaphragm
position
Wire Color
OUT/GND
2-wire
≈121 mm
Function
4…20 mA
≈ 146 mm
RS485B
Yellow
Subject to alterations
03/08
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
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