NOVUS N320 Temperature meter User Manual
- June 5, 2024
- Novus
Table of Contents
NOVUS N320 Temperature meter User Manual
The N320 is a temperature meter that provides you in the frontal display the
measured temperature of the sensor connected to its terminals. The temperature
sensors available are NTC Thermistor, Pt100 and J, K, T type thermocouple,
with offset correction capability.
The features of a particular model (input sensor type, sensor range, mains
supply, etc) are identified by the label placed on the thermometer body.
SPECIFICATIONS
INPUT SENSOR: The sensor is chosen by the user at the time of purchase and is presented on the upper side of the equipment box. The options are:
- Thermistor NTC, 10 k @ 25 °C; Range: -50 to 120 °C (-58 to 248 °F); Accuracy: 0.6 °C (1.1°F);
Maximum error in the interchangeability of original NTC sensors: 0.75 °C (33.35 °F). This error can be eliminated through the offset parameter of the equipment.
Note: For the NTC thermistor option, the sensor comes with the equipment. Its operating range is limited to -30 to +105 °C (-222 to +221 °F). It has cable of 3 m in length, 2 x 0.5 mm², and can be extended up to 200 meters.
- Pt100; Range: -50 to 300 °C (-58 to 572 °F); = 0.00385; 3 wires; Accuracy: 0.7 °C (1.3 °F); according to IEC-751 standards;
- Thermocouple type J; Range: 0 to 600 °C (32 to 1112 °F); Accuracy: 3 °C (5.4 °F);
- Thermocouple type K; Range -50 to 120 °C (-58 to 248 °F); Accuracy: 3 °C (5.4 °F);
- Thermocouple type T; Range: -50 to 120 °C (-58 to 248 °F); Accuracy: 3 °C (5.4 °F);
Thermocouples according to IEC-584 standards.
ELECTRICAL WIRING
Fig. 1 below shows the temperature meter connections to sensor, mains and outputs.
Pt100 with 3 conductors. Terminals 11, 12 and 13 must have the same wire resistance for proper cable length compensation. For 2 wire Pt100, short circuit terminals 11 and 13.
It is important to follow the recommendations below
- Signal wires should be installed in grounded conduits and away from power or contactor wires.
- The instrument should have its own power supply wires that should not be shared with electrical motors, coils, contactors, etc.
- Installing RC filters (47 R and 100 nF, series combination) is strongly recommended at contactor coils or any other inductors.
- System failure should always be taken into account when designing a control panel to avoid irreversible damage to equipment or people.
OPERATION
The temperature meter requires the internal parameters to be configured according to the intended use for the instrument. The parameters are organized in 3 groups or levels:
Level 1 - Configuration Level
Level 2 - Calibration level
ERROR MESSAGES
The thermometer displays messages that correspond to problems related to temperature measurement.
CONFIGURATION PROTECTION
A protection system to avoid unwanted changes to the temperature meter
parameters is implemented. The level of protection can be selected from
partial to full. The following parameters are part of the protection system:
Pas When this parameter is presented, the correct password should be
entered to allow changes of parameters in the following levels.
Prt Defines the level of parameters that will be password protected:
1- Only calibration level is protected (factory configuration);
2- Calibration and configuration levels are protected.
PAC Parameter for definition of a new password. Since it is located in
the calibration level, can only be changed by a user that knows the current
password. Valid passwords are in the range 1 to 999.
CONFIGURATION PROTECTION USAGE
PAS parameter is displayed before entering a protected level. If the correct password is entered, parameters in all following levels can be changed. If wrong or no password is entered, parameters in the following levels will be read only.
Important notes:
- After five consecutive attempts to enter a wrong password, new tentative will be blocked for the next 10 minutes. If the current valid password is unknown, the master password can be used only to define a new password for the temperature meter.
- The password for a brand new device is 111.
MASTER PASSWORD
The master password allows user to define a new password for the temperature
meter, even if the current password is unknown. The master password is based
in the serial number of the temperature meter, and calculated as following:
[ 1 ] + [ higher digit of SN2 ] + [ higher digit of SN1 ] + [ higher digit of
SN0 ] For example the master password for the device with serial number
97123465 is: 1 9 3 6
As follows: 1 + sn2= 97; sn1= 123; sn0= 465 = 1 + 9 + 3 + 6
How to use the master password:
1- Enter the master password value at PaS prompt.
2- Go to PA( parameter and enter the new password, which must not be zero (0).
3- Use this new password.
WARRANTY
Warranty conditions are available on our website www.novusautomation.com/warranty.