Mantracourt Electronics Limited
DCell & DSC MantraCAN User Manual
5
Self-diagnostics
Continuous monitoring for faults such as strain overload, over/under-temperature, broken sensors or unexpected
power failure.
All fault warnings are retained on power-fail.
Special Facilities
Output Capture Synchronisation
A single command instructs all devices on a bus to sample their inputs simultaneously, for synchronised data
capture.
Output Tare Value
An internal control allows removal of an arbitrary output offset, enabling independent readings of net and gross
measurement values.
Dynamic Filtering
Gives higher accuracy on stable inputs, without increased settling time.
Programmable Output Modes
Output rate control enables speed/accuracy trade-off.
ASCII output version provides decimal format control and continuous output mode for ‘dumb terminal’ output.
Unique Serial Number
Every unit carries a unique serial-number tag, readable over the communications link.
Communications Error Detection
CAN transmit and receive error counts along with CAN bus status can be read from the device.
External Temperature Sensing (optional)
An external temperature module for improved accuracy (especially tracking changing temperature conditions).
Software Reset
A special communications command forces a device reboot, as a failsafe to ensure correct operation.
Version 3 Additions and Enhancements
The following are an outline only more detail will be found further on in this manual
DCell
•
Easy mounting via a 2mm screw
•
Connection via solder holes to either side of PCB
•
Lower profile, dual PCB construction
DSC
•
Additional I/O
•
Easier shielding connection at load cell connector end
DCell & DSC
•
Bit rates to 1 Mbps
•
Higher sampling rate. Sampling to 200Hz can now be achieved. Also more sampling rates are available as
follows 1, 2, 5, 10, 20, 50, 60, 100 & 200Hz
•
Lower cost. With new technology and further use of miniaturisation the cost is now lower
•
Real mV/V calibration. Instead of % full scale the base measurement is in mV/V and is factory calibrated to
within 0.1%. the % of FS output “ELEC” is still available
•
Extreme Noise Immunity, 5 x heavy industrial level
•
Diagnostics LED. An LED is used to indicate that the device is powered and working correctly. The LED is also
used to indicate which protocol the device is
•
Remote shunt cal. A 100K 1% 50ppm/Deg C resistor can be switched across the bridge to allow load cell
integrity to be established
•
Peak & Trough Measurements. Added to allow the faster rates to hold a peak or trough readings. These are
stored in volatile memory & are therefore reset on power up
•
Programmable dynamic filtering. The filtering is the same as used on Version 2 but with the advantage of
being able to set the characteristics using the communications
