FAQs for SL Level

My old unit was an SE - This one looks different - is it compatable?
What needs to be done when I install a new sensor?
Can I re-calibrate a sensor in the field?
Are the ZERO and SPAN settings affected by each other?
Can I perform a SPAN change with product in the vessel?
Is there a quick troubleshooting guide?
Display of level indicator goes to zero when the test meter is disconnected, but reads correctly while meter is connected across the Test+ and Test- terminals.
 
My old unit was an SE - This one looks different - is it compatable?
 The SL/SX sensors are an upgrade to the previous SE sensor model. Function is identical as far as both provide a 4-20 mA signal output - wiring is the same. Note that ranges should be reviewed. SL/SX sensors may use different ranges than the SE to cover the same calibration range.
 

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What needs to be done when I install a new sensor?
 

In most cases, sensors are supplied pre-caibrated directly from the factory. Details are as follows:

1. Be sure to follow tag to ensure watertight cable entry.
2. Wire receiver to LOOP (+) and LOOP (-) terminals.
3. Power sensor with 12-40 VDC.
4. Be sure vessel is empty
5. Perform a ZERO calibration - hold down ZERO switch for 5 seconds - release (No additional tools required)

For complete service manual - Click to See (Pg 11 shows details)

 

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Can I re-calibrate a sensor in the field?
 There are four ranges of sensor - desired new calibration MUST be within range of that model. Instructions are provided in the Service Manual - Click to See.
 

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Are the ZERO and SPAN settings affected by each other?
 No - Zero and Span settings are non-interactive. When a Zero is performed, it is not necessary to perform a check of the Span.
 

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Can I perform a SPAN change with product in the vessel?
 Yes - Changes to the span may be made using the on-board Field Cal feature of the sensor, even with product in the vessel.

CAUTION - Performing this operation will affect the current output of the unit - be sure to verify all automated controls first.

 

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Is there a quick troubleshooting guide?
 Yes - Technical Bulletin TS-3001 shows quick troubleshooting tips. - Click to See
 

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Display of level indicator goes to zero when the test meter is disconnected, but reads correctly while meter is connected across the Test+ and Test- terminals.
 The sensor may have been temporarily miswired, or the meter leads improperly located, resulting in a component failure within the sensor. A wire jumper may be connected between the Test+ and Test- terminals to bypass the failed component. The Test terminals will no longer be useable.
 

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