Alpha Moisture Systems DS5000 Інструкція з експлуатації - Сторінка 17
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While the sensor should give several years operation, it is advisable to have the calibration
verified, from time to time, to ensure accurate operation of the system. Please refer to your
local dealer for recalibration information.
The number and type of items employed in the sample loop will determine what, if any, other
routine checks should be made. If, for instance, a filter is used, the filter element should be
inspected periodically and changed when necessary.
The instrument should not require any routine maintenance but if any malfunction is
suspected it is advisable to contact your local dealer.
Should it be necessary, at any time or for whatever reason, to change either the instrument or
sensor, it should be noted that the components of the DS5000/DT45 system are completely
interchangeable.
13 Faults/Errors
If the sensor is short-circuited the display will read 'Shrt', the voltage output will drive to
full scale, the current output will drive to 24mA and both alarms/relays will trip.
If the sensor is open-circuited, the display will read 'oPEn', the voltage output will drive to
full scale, the current output will drive to 23.5mA and both alarms/relays will trip.
If communication with the transmitter is lost for a minimum of 20 seconds, the display will
read 'conS', the voltage output will drive to full scale, the current output will drive to 23mA
and both alarms/relays will trip.
If the sensor is wetted beyond its upper limit or the moisture reading is above the selected
units upper limit, the display will read 'ovEr', alternating with the upper display limit, or
transmitter range, at 0.5Hz.
If the sensor is dried beyond its lower limit or the moisture reading is below the selected units
lower limit, the display will read 'Undr', alternating with the lower display limit, or
transmitter range, at 0.5Hz.
Note: When an alarm trips the internal buzzer is sounded and the associated relay also trips. Only the
buzzer can be disabled in the system menu.
13.1 Other Error mesages
'Err1' = Alarm point set outside operating range of sensor
'Err2' = 4mA o/p setting is greater than 20mA o/p setting
'Err3' = 0v o/p setting is greater than the 5v o/p setting.
'Err4' = Offset greater that 2 0ºC or equivalent in other Engineering Units.
'Err5' = Sensor has been Auto Calibrated beyond 50% of its original range. Return
for calibration.
1188 Instruction Man DS5000.doc
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