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6" Chart Recorder
- How to Change Charts
- Why Did the Chart Stop Turning?
- Why Doesn’t the Chart Recorder Respond to Changes?
- Why Doesn’t the Display and Chart Match?
- How to Change Pens
A Snapshot of Changing Charts
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Causes and Troubleshooting:
The chart may be hung up or restricted, possibly caused by a rip on the outer edge of the chart. The chart may also be caught between the arm and pen arm platform. that the gears are not binding or slipping by manually advancing the chart one full rotation with the chart rotation button.
Unit may also be locked up. This can be confirmed by pressing any of the buttons on the keypad. If the unit is locked up, there will be no response to button presses.
The recorder may appear to be working, but the readings won’t change and the chart will not rotate. To correct this, remove the battery and AC power (if applicable) for a minute and then re-power.
|Trouble Symptoms||Probable Causes||Suggested Corrections|
|Unit is locked up.||Can be confirmed by pressing any of the buttons on the keypad. If the Chart Recorder is locked up there will be no responses to button presses, however, the unit may appear to be working, but the readings won’t change and the chart will not rotate.||Remove power and battery then re-power|
|K-type Thermocouple is used.||The probe may need to be replaced or the extension cable||Replace the probe with another K-type thermocouple probe or remove the extension cable if applicable.|
|Chart Recorder will not operate at all.||Caused by an interruption of power||Remove batteries and transformer, wait about 1-minute and power back up. This does not affect the unit’s functionality or calibration in any way.|
|Why won’t the pen respond to changes?||If the pen will not move from the bottom of the chart scale, there may be a leak in the system. The unit will need to be serviced and re-calibrated.||Make sure the pen arm screw is snug, not allowing the pen to swing freely.|
|Instrument is not responding to a key press?||The key may be pressed too hard. The recorder may be locked up. If so, there will be no response to button presses. The unit may appear to be working, but the readings won’t change and the chart will not rotate.||If your instrument is not responding to a key press, try using slower, firmer key presses. remove the AC power and the battery, wait a moment, and then re-power|
|Symptoms||Probable Causes||Suggested Corrections|
|Mismatch Display||Using charts for another range or wrong dip switches||
Ensure the proper chart is installed and that the dip switches are set for that specific chart
Ensure that the gears are not binding or slipping by manually advancing the chart one full rotation with the chart rotation button. The pens may not be completely inserted on the pen arms.
|Mismatch Display||Pen Home is not set properly||Press and hold the Chart Rotation and Alarm button, then press the On/Off button. Hold down all three buttons until the unit comes on, the light should be flashing amber. When the amber light becomes steady, press the Alarm button twice, the light should alternate between Red and Green and the pen will move toward the top of the chart. The pen should stop on the Maximum Temperature Line of the chart that is being used. If the pen is not exactly on the Maximum Temperature Line, use the Alarm button to move the pen down and the Chart Rotation button to move the pen up.|
|Why don’t the readings of the temperature pen and display exactly match?||
The cause of this could be because Hysteresis or wrong
|Hysteresis is a naturally occurring mechanical discrepancy up to 2% of range. Check to see that the proper chart is installed.|
Changing Pens Can Be Easy and Important
Learn more in Chart Recorder Topics
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