NOVUS TEMP WM/ TEMP DM - Manual (Page 2)

SPECIFICATIONS
Accuracy: 0.5 °C @ 25 ºC (1.6 ºC for the entire measurement range);
Range: Configurable betwen -50 and 120 °C, (see Operating limits);
Default: 0 to 100 °C
Operating limits:
TEMP-WM: Electronic circuit: -20 to +65 °C
TEMP-DM: Electronic circuit: -20 to +65 °C
Sensor and probe: -40 to +100 °C
Note: For temperatures above 65 ºC or below –20 ºC, a maximum of 50 % of the
probe length (TEMP-DM) should be exposed to this temperature, to avoid
conducting extreme temperatures to the electronic module.
Response time: up to 30 seconds in slow moving air.
Power supply: 4-20 mA model: 12 Vdc to 30 Vdc
0-10 V model: 18 to 30 Vdc / 15 mA max.
Outputs: 4-20 mA or 20-4 mA current, 2-wire loop power supply
0-10 Vdc voltage / 2 mA max.
Output Load (RL): 4-20 mA model: RL (Ohms max.) = (Vdc – 12) / 0.02
let Vdc = Loop power supply (12 to 30 Vdc)
0-10 Vdc model: 2 mA max.
Output Resolution: 4-20 mA: 0.006 mA
0-10 Vdc: 0.003 V
Reverse resolution: YES
Protection Electronic circuit case: IP65; Sensors capsule: IP40
Cable entrance: Compress fitting PG7;
Sensor, output and power supply are not electrically isolated.
IMPORTANT NOTE:
An identification label, on the transmitter body, shows the characteristics of this model.
No accuracy improvement results from narrowing the range for the 4-20 mA output.
For example, the specified accuracy will be achieved for a transmitter configured to
a -50 to 100 °C or to a 20 to 40 °C range.
Shall any error occur in the measures taken by the sensor, they can be corrected
with the TxConfig software. The TxConfig interface can be connected to the
transmitter even connected to the process and under operation. See Figure 03 and
Zero Correction field in the main screen of the TxConfig software.
It is possible that some temporary oscillations occur on the transmitter output when
it is powered on and some changes are applied on its configuration.
CONFIGURATION
If the default configuration or the ordered configuration satisfies the application, then
no further configuration is necessary and the transmitter is ready to be used. If a
new setting is desired, this can be accomplished by the TxConfig and sent to the
transmitter through the TxConfig Interface.
The TxConfig Interface and Software compose the Transmitter Configuration Kit,
which can be purchased separately. The latest release of this software can be
downloaded from our web site. To install, run the Tx_setup.exe and follow the
instructions.
The TxConfig interface connects the transmitter to the PC, as shown in Figures 01
and 02. There are two types of interface: TxConfig-RS232 and TxConfig-USB.
Figure 01 – TxConfig Interface connections model RS232
Figure 02 – TxConfig Interface USB connections
Once the connection is accomplished, the software shows the configuration options
of the transmitter model attached. Access the Help for usage instructions.
The TxConfig screen in shown in Figure 03.
Figure 03 – Main window of TxConfig software
The fields in the screen mean:
1. Measuring Range: Defines the output scale for the input sensor. Program here
the measurement Lower Value and the Upper Value.
When the lower limit is defined with a value higher than the High Limit the output
current operates from 20 to 4 mA.
The values configured in these fields can not be beyond the sensor measuring
range. The minimal span value has to be observed as well.
2. Sensor Failure: Establishes the transmitter output behavior (upscale or down-
scale) in the presence of a sensor fail. When Minimum is selected, the output
current is < 4 mA (down-scale), typically used for refrigeration. When Maximum is
selected, the output current is > mA (up-scale), typically used in heating systems.
3. Zero Correction: Allows for small sensor corrections.
4. Apply: Transmitter identification data. These information must be informed when
the user contact us.
5. Read Device: Brings to the screen the current transmitter parameters
configuration.
6. Send Configuration: Sends a new configuration to the transmitter.
Note: The factory default configuration is (unless otherwise specified or ordered):
• Temperature span 0 to 100 °C / 0 °C of zero correction / Upscale when sensor fails.
During configuration, the transmitter needs to be electrically powered. TxConfig
USB interface can provide the power to the transmitter, but this also depends on the
used computer hardware.
The TxConfig-RS232 interface, however, requires an auxiliary supply for guarantee
reliable communication with the computer. An external 9V battery can be used for this
purpose (Figure 01). An alternative is to configure the transmitter while it is in
operation; this way, the needed energy is supplied by the current loop. See Figure 04.
Figure 04 – TxConfig Interface connections - Powered current loop or power supply
The TxConfig interfaces contain dedicated circuitry for proper
communication between transmitters and computer. Always make use of
the TxConfig interfaces for configuration purposes, otherwise the
transmitters may get damaged, voiding the warranty.
Serial port configuration errors may occur when other software are sharing
the same serial port. Close all serial port applications prior to using the
TxConfig software.