Gesint BL User manual

Immerse the APS probe into the liquid, until it reaches a level quote equal
or lower to the minimum level to be measured. Connect, using a 4x6mm
pipe or compressed air, the low regulator on the top to a pressure
reducer so that input air has a pressure between 10 and 20psi, based on
the length o the probe and speci ic weight o the liquid. The input air
speed up and optimize the level probing and become a physical barrier
between the liquid and the transmitter, protecting it rom high
temperature or steams. It is recommended to use a dedicated air supply
pipe or every APS probe. Then connect, with another 4x6mm pipe, the
second pneumatic connection o the APS probe to the ront input o the
BL transmitter.
It is recommended to install the transmitter higher than the maximum
measured level and as near as possible to the probe. Set the level o the
liquid to the maximum and adjust the screw on the low regulator in order to obtain a
continuous and regular air bubbling rom the lower end o the APS probe. To avoid
measure errors do not install the probe near the connection o suction pumps and, i a
mixer is used, it is possible to reduce the turbulence protecting the lower end o the probe
with an external pipe.
GESINT
GESINTGESINT
GESINT
®
®®
®
BL
Hydrostatic head level
transmitter for liquids
Installation
The warranty is valid or 12 months rom purchase, and expires i instrument is improperly
used or not correctly installed on system.
Warranty
CE mark according to Directive 89/336/CEE, complies with the ollowing harmonised
regulations: EN50081-1, EN 50082-2, EN55022, EN61000-4-2, EN61000-4-3,
EN61000-4-4, EN61000-4-5, EN61000-4-6, EN61000-4-11 and Low Voltage Directive
73/23/CEE and subsequent modi ications.
Technical data
GESINT
GESINTGESINT
GESINT
®
®®
®
GESINT S. .L.
Via Enzo Ferrari 25
20010 Arluno - ITALY
Tel. [phone]
E-mail: in [e-mail] - WWW.GESINTSRL.IT
Power supply: 24VAC/DC switching
Power consumption: 2VA / 1,8W max
Pressure range: 0-1000 mmH
2
O (0-9,807KPa)
0-5000 mmH
2
O (0-49,033KPa)
Accuracy: 0,5% .s.
Analogue output: 0/4-20mA or 0/2-10V
Output impedance: Max 750Ω (mA) or Min 1KΩ (V)
Relay output: 2 SPDT relays
Mechanical li e: min. 10
7
cycles
Electrical li e: N.O. @ 3A 250VAC : 5x10
4
N.C. @ 2A 250VAC : 2x10
5
Contact rating: 3A @ 30 VDC (resistive load)
3A @ 250 VAC (resistive load)
Programming: 2 push buttons
Protection: IP20
Storage temperature: rom –30 to +80°C
Working temperature: rom –20 to +60°C
Relative humidity: rom 0 to 85%, no condensate
Installation: 35 mm DIN rail
Electrical connection: Removable terminal board
Dimensions: 90(H) x 35(L) x 60(P) mm
BL device, combined with our APS probe, is a
level transmitter or liquids in open tanks.
The APS probe is made with a Ø16mm pipe,
open at the bottom end, with 2 pneumatic
connections at the top. One connection goes to
the BL transmitter and the other to an air low
regulator that keeps the input air pressure
constant. The input pressure to the transmitter
is converted in a 4-20mA or 0-10V signal
representing the level o the liquid in the tank.
The transmitter is supplied with 2 independent
relay thresholds that can be adjusted using the
onboard programming buttons.
ev.2

The transmitter must be power supplied with 24Vac/dc.
It is recommended to use a connection cable o at least 0,5mmq
section and a maximum length o 100mt. Connection cables
must have separate run rom power cables.
It is recommended to check the maximum load, i used with
current output, or the minimum load, i used with voltage output.
In order to use voltage output (0-10V) pin 7 and 8 must be
connected together.
In order to access the 2 programming buttons, remove the ront cover o the transmitter.
Then connect a re erence multimeter to the analogue output pins.
1) Press P2 button or at least 3 seconds, until G EEN led start blinking, and ED
leds blink alternatively.
2) Set luid at the desired level and wait until value on multimeter is stabilized. Then
press and release P2 or irst threshold (OUT1) or P1 or second threshold (OUT2).
3) Repeat step 2) i you need to acquire the other threshold. Please note that now is
blinking the ED led corresponding to the threshold that is not acquired yet.
4) To store threshold(s) acquired press and release both P1 and P2.
Is it possible to disable thresholds on the transmitter by executing only step 1) and 4).
Threshold calibration
4-20mA or 0-10V output calibration
During manu acturing and actory testing, the transmitter is calibrated or 4-20mA or
0-10V output using precise instruments. This calibration should be executed only i a
di erent output type or range is needed.
In order to access the 2 programming buttons, remove the ront cover o the transmitter.
Then connect a re erence multimeter to the analogue output pins.
During this calibration phase, relays output will be activated or diagnostic purpose. It is
recommended to disconnect upper terminal board.
1) While transmitter is powered o , keep pressed both P1 and P2 buttons and then
power on.
2) Keep both buttons pressed or at least 3 seconds, until G EEN led start blinking:
now it’s possible to release them.
3) OUT2 ED led is now on, indicating the output calibration corresponding to the
minimum level.
4) Press P2 or increase and P1 or decrease the output value, until you read on
multimeter the needed value (ex. 0,0Vdc or 4,0mA).
5) Now press both P1 and P2 and release them.
6) OUT1 ED led is now on, indicating the output calibration corresponding to the
maximum level.
7) Press P2 or increase and P1 or decrease the output value, until you read on
multimeter the needed value (ex. 10,0Vdc or 20,0mA).
8) Now press both P1 and P2 and release them.
9) Both ED led remain on or a ew seconds while data are stored in the transmitter.
10) Transmitter reset itsel and start working.
0-100% level calibration
In order to access the 2 programming buttons, remove the ront cover o the transmitter.
Then connect a re erence multimeter to the analogue output pins.
1) Press P1 button or at least 3 seconds, until G EEN led start blinking, and ED
leds blink alternatively.
2) Set luid level at minimum and wait until value on multimeter is stabilized. Then
press and release P1 button.
3) Now only one o the two ED leds is blinking. Set luid level at maximum and wait
until value on multimeter is stabilized. Then press and release P2 button.
4) ED leds are now blinking together. Press both P1 and P2 and release them so
that transmitter writes in memory the data acquired.
It is possible to acquire only o the two level settings, by pressing P1 button or minimum
level or P2 button or maximum level and then con irm by pressing both P1 and P2.
For better per ormance, it is recommended to avoid calibration where the di erence
between minimum and maximum level is lower than 1/3 o transmitter range span.
Electrical connections
LED signalling
G EEN LED (Power):
• ON: transmitter is powered and working
• Fast blinking: programming mode
• Slow blinking: empty or invalid data in eeprom, transmitter need to be calibrated
(both output and level)
ED LED (Out1 - Out2):
• ON: active level threshold
• Blinking: programming mode