BCs160VA
Nov. 15, 1997
SMART-PULP
Smart Consistency Transmitter
33
4.2
Error messages
Select MESSAGES in the DIAGNOST menu, first
error message will be displayed. Press [ENTER].
The transmitter displays the ERASE? prompt. Press
[ENTER] to remove the selected message. Proceed
in the same way to read and remove the rest of the
messages. When the text NO MESS is displayed,
press [ESC] to return to the highest level in the
diagnostics menu.
Serious faults/errors:
The following faults are so serious that the
transmitter’s normal operation is terminated and
error current (3.7 mA or 22.5 mA, depending on the
ALARM TYPE selection) gives an error alarm:
Error messageDescription
CPU.EE ER
Memory fault on CPU board.
ADC.EE ER
Memory fault on ADC board.
FORCE ER
Shear force channel faulty.
T. SEN ER
Sensor (transducer) temperature
channel faulty.
T. PRO ER
Process temperature channel faulty.
T. HOU ER
Electronics housing temperature
channel faulty.
Less serious faults/errors:
These faults will not cause error current:
TX/RX ER
Lower-level communication error.
Disturbances in HART® or Modbus
communications.
AD ERROR
AD converter error.
Conversion restarted.
HART ERR
Higher-level HART® communication
error.
MODB ERR
Higher-level Modbus communication
error.
DISP ERR
Operator unit communication error.
Warnings and error messages during operation:
W.NO CAL when selecting active recipe means that
recipe has not been calibrated. Base curve is used.
Blinking recipe text later indicates the same thing.
NO.SAMPLE in laboratory means that SMART-
PULP is missing the sample(s). Blinking USE BOTH
is warning that samples are too close of each other
causing calibration risk.
REPEAT.CA indicates that calibration was not
succesful, there was too much deviation to base
curve. Repeat sampling and laboratory.
4.3
Checking the operation of
force mesurement and
current output
Since SMART-PULP displays and communicates
the shear force and mA output in digital format, the
transmitter is provided with the TRIM-F and TRIM-
MA functions for trimming these outputs. The need
for calibration depends on the individual transmitter.
Stability in force measurement is better than 0.25%
max. per 6 months, which corresponds to 7.5 g per 6
months in shear force.
Normal regular consistency calibration will rectify the
effect of the force transducer’s zero drift on
consistency measurement, but if you want to utilize
the force information separately you must also
calibrate the transmitter’s shear force measurement.
If you want a standby transmitter that replaces a
faulty one to operate identically with the replaced
transmitter without sampling, you have to calibrate
the transmitter’s force measurement regularly (e.g.
once a year).
Using a traceably calibrated ammeter and weights
for calibration will provide a traceably calibrated
shear force measurement, as required by modern
quality systems.
The TRIM-F function requires that you mount the
transmitter to the calbration stand with the sensor
blade pointing directly downwards. In two-point
calibration the blade’s weight is measured without
additional weights and with a measured additional
weight (1 to 3 kg). These two points allow the
checking and, when necessary, recalibration of the
force measurement. When desired, you can also
calibrate the zero point alone. In that case you only
have to measure the sensor blade’s own weight. The
transmitter eliminates the blade’s own weight from
the displayed reading, and displays 0 g.
The TRIM-MA function requires that you connect an
accurate ammeter (accuracy better than +2
µ
A) to
the transmitter’s output. The transmitter gives out
three different currents, while you measure the
actual current precisely and, when necessary,
correct the readings on the transmitter. On the basis
of the three test currents the transmitter calculates
the required correction factors.
MA-LOCK
Locking and forcing the output signal
This command locks the output signal to its present
value and displays the mA value. You can then
change the current value with the arrow keys as
desired. This command can be used to check the
cabling and current measuring circuits.