gefran 40T 72 Quick Start Manual

Main applications
• Thermostat
• Humidity switch
• Mould cooling units
• Industrial refrigerators
• Air conditioning
• Food processing equipment
GENERAL
Microprocessor based indicator in 72x36
format manufactured with SMT.
The instruments have a lexan membrane
faceplate (guaranteed to IP65) which has
3 keys, a 2, 3 / 4 digit display.
The input signal can be selected from a
wide range of sensors:
• Thermocouples of type J, K, R, S, T, B,
E, N, L GOST, U, G, D, C
• Resistance thermometers Pt100,
Pt100J (japanese standard) 2 / 3 wire
• PTC and NTC themistors
• Linear inputs 0 to 60/12 to 60mV,
0 to 20/4 to 20mA,
0 to 10/2 to 10/0 to 5/1 to 5/0 to 1/0,
2 to1V
The selection is made using the faceplate
keys and correct input contact.
No external shunt or adapter is required.
A digital input (24Vdc/4mA) is available
for resetting, hold, flash, peak handling or
releasing latch. The instruments have a
maximum of 3 outputs that can be
mechanical relays (5A/250V) or logic
outputs (0 to 11Vdc). In alternative to
output 3 a 4 to 20mA output is available
(max. 150Ω) for retransmission of the
measured input signal, or a digital input
(24Vdc/4mA) can be provided which can
be used for resetting, hold, flash, peak
handling or releasing latch.
40T 72
CONFIGURABLE INDICATOR
Finally, a triac can be fitted (as an
alternative to the other two relay outputs)
that can drive resistive loads up to a
maximum of 2,5A at 220V.
The programming of the instrument is
made easy by grouping the parameters in
function blocks (CFG for the alarm
hysteresis, Inp for the inputs, Out for the
outputs...) and by a simplified data entry
menu.
The configuration can be simplified even
further using the PC programming kit
made up of a connection cable and a
menu guide program that runs under
Windows (see data sheet cod.
WINSTRUM).
A configurable personal software
protection code (password protection)
can be used to restrict the levels of
editing and displaying the configuration
parameters.
Main features
• Faceplate configurable input
• Protected by a personal code
• Configurable by a serial link
• Transmitter power supply incorporated
• Custom thermocouple linearisation
available
• Internal linearisation for engineering
units
• Labels provided for the more common
physical units
• Sampling time and trip intervention
programmable between 15 and
120msec with resolution between
2000 and 8000 steps
• Retransmission of the measured
variable signal
• 3 trip points, completely configurable
from the faceplate
TECHNICAL DATA
I
NPUTS
Accuracy 0,2% f.s. ±1digit.
Sampling time 120msec for temperature
sensors, configurable for linear inputs
down to a minimum of 15msec with
reduction of the resolution to 2000 steps.
Configurable decimal point position for
linear inputs, for TC, RTD, PTC and NTC
inputs, only one decimal digit is allowed
in the maximum display range of
-199.9 to 999.9 (4 digit display),
-99.9 to 99.9 (3 digit display with sign),
-9.9 to 9.9 (2 digit display with sign) with
indication of open circuit thermocouple or
RTD, PTC or NTC in open or short circuit,
indication of over- and under-range for
linear inputs.
TC - Thermocouple
Automatic cold junction compensation
(4 digit)
J 0 to 1000°C / 32 to 1832°F
K 0 to 1300°C / 32 to 2372°F
R 0 to 1750°C / 32 to 3182°F
S 0 to 1750°C / 32 to 3182°F
T -200 to 400°C / -328 to 752°F
B 44 to 1800°C / 111 to 3272°F
E -100 to 750°C / -148 to 1382°F
N 0 to 1300°C / 32 to 2372°F
L-GOST 0 to 600°C / 32 to 1112°F
U -200 to 400°C / -328 to 752°F