Brief Description; Technical Data - Gossen MetraWatt SIRAX V 644 Mode D'emploi

(8)
(6)
Fig. 2
(2) Data card
(6) Type label
(7) Programming connector
(8) Fastener
Red LED for open-circuit sensor supervision
or
( ( Red LED for one trip point GW (where a limit monitor is
ordered instead of the open-circuit sensor supervision)
( (
S1 Calibration button for automatically compensating the leads
for used in conjunction with a two-wire resistance
thermometer circuits
ON Green LED for signalling operating status

4. Brief description

Resistance thermometers, thermo-couples, resistance sen-
sors, potentiometers or DC current or voltage sources are
connected to the programmable universal transmitter
SIRAX V 644 which then converts the corresponding input
signals into impressed current or voltage output signals.
Explosion-proof "intrinsically safe" [EEx
approved for processing measured variables in explosion
hazard zones rounds off this series of transmitters.
The transmitter SIRAX V 644 fulfils the protection requirements
according to the EMC guideline (89/336/EWG). The device
bears the CE symbol for EMC.
Measured variables and measuring ranges are programmed
with the aid of a PC, a programming cable and the pro-
gramming software. Specific measured variable data such
as output signal, transmission characteristics, active direction
and open-circuit sensor supervision data can also be
programmed.
Transmitters supplied ex stock are configured as follows:
– Measuring input
– Measuring output
– Setting time
(7)
– Break monitoring
– Mains ripple suppression
(2)
– Limit function
( )
ON
S1

5. Technical data

Measuring input
Measured variable M
The measured variable M and the measuring range can be
programmed
Table 1: Measured variables and measuring ranges
Measured variables
DC voltage
direct input
via voltage divider
DC currents
low current range
high current range
Temperature monitored
by two, three or four-
wire resistance thermo-
meters
low
resistance range
high
resistance range
ia] IIC versions
Temperature monitored
by thermo-couples
Variation of resistance
of remote sensors/
potentiometers
low
resistance range
high
resistance range
Note permissible value of the ratio "full-scale value/span ≤ 20".
1
2 Max. 30 V for Ex version with I.S. measuring input.
0...5 V DC
0...20 mA linear
Fixed value 0%
during 5 s after
switching on
0.7 s
Inactive
50 Hz
Inactive
Measuring ranges
Limits Min.
span
± 300 mV
1 2 mV
± 40 V
2 1
300 mV
± 12 mA
1 0.08 mA 12 mA
– 50 to 0.75 mA 100 mA
+ 100 mA 1
– 200 to
850 °C
0...740 Ω 8 Ω
1
0...5000 Ω 40 Ω
1
– 270 to 2 mV
1820 °C
0...740 Ω 8 Ω
1
0...5000 Ω 40 Ω
1
Max.
span
300 mV
40 V
740 Ω
5000 Ω
300 mV
740 Ω
5000 Ω
23