Frequently Asked Questions

FS21NX | LS11NX | FS4200 & FS42NX | LS3200 & LS32NX | VS5100 & VS51NX

FS4200 & FS42NX microtuf® FAQ

Q. How do you calibrate the Delta M FS4200 Mass Flow Switch?
A. REFER TO SECTION 4.3 of the Operation and Maintenance Manual for the flow calibration procedure.

Q. What does it mean when the unit’s LED’s will not change while making the zero adjustment?
A. Typically when a change in the LED’s cannot be achieved on the zero adjustment it is a sensor problem. A sensor problem could be anything between the wiring from the sensor tips to the electronics enclosure. Check all wiring connections, for a diagram of the correct wiring layout REFER TO FIGURE 7A of the Operation and Maintenance Manual. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. What does it mean when the unit will not toggle while making the span adjustment?
A. First thing to determine is if you are calibrating the unit to detect AIR FLOW or LIQUID FLOW. In most cases when detecting AIR FLOW the J1 jumper must be removed. Observe if the jumper is inserted only on one pin of the J1 header or both pins. By removing the jumper from both pins you are setting up the unit to detect AIR FLOW. If you are calibrating the unit for LIQUID FLOW the jumper may need to be inserted on both pins of the J1 header. If the J1 jumper is not your problem it could be an application or board problem, seek advice from technical support at the factory.

Q. I am not getting the correct relay logic from the switch?
A. The relay logic is determined by whether you are wired out of the Normally Closed or Normally Open contact and what position the Fail Safe Jumper (J2) is put in. For a diagram of the configuration you desire REFER TO SECTION 5.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad sensor?
A. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad set of electronics?
A. Substitution is the best method of trouble shooting. If you have another unit in the facility, try swapping out the board in question with a known working set of electronics. If no other electronics are available check your sensor by REFERERING TO SECTION 6.2.2 of the Operation and Maintenance Manual or seek advice from technical support at the factory. If the sensor checks out most likely it’s a board problem.

Q. Where do I get a replacement fuse for the electronics?
A. REFER TO SECTION 8.3 of the Operation and Maintenance Manual for a list of parts and part numbers. Use the exact same fuse that is supplied with the unit. Changing the fuse with a different type can void a Cenelec, CSA, or EX rating.

Q. How far into the pipe should the sensor be for a good flow switch installation?
A. Ideally in the center of the pipe, but at least 1/3 of the diameter is sufficient in most cases.

Q. What insertion length should I order?
A. Center of the pipe is best for optimal performance, but at least 1/3 of the diameter is sufficient in most cases. Insertion is measured from the bottom of the process connection to the end of the probe tips.

Q. How do I know what voltage to apply?
A. The correct voltage should be marked with an X on the transformer tag mounted on the electronic board. You can also look at the serial number tag on the enclosure for the voltage in the model number code: -110- = 110VAC, -220- = 220VAC, -24D- = 24VDC or -24A- = 24VAC

Q. How much amperage is required to operate the switch?
A. At least 0.25A should be supplied to the unit REFER TO SECTION 7.0 of the Operation and Maintenance Manual for the specifications of your switch.

Q. What should I use to clean the probe or sensor tips?
A. The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto the sensor tubes, or by ultrasonic cleaning. Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off once cleaned. For unusual cleaning problems, call DELTA M and determine the exact materials of construction and chemical compatibility before using strong acids or unusual cleansers. REFER TO SECTION 6.1 of the Operation and Maintenance Manual.

LS3200 & LS32NX microtuf® FAQ

Q. How do you calibrate the Delta M LS3200 Point Level Switch?
A. REFER TO SECTION 5.3 of the OPERATION AND MAINTENCE MANUAL for the calibration procedure.

Q. What does it mean when the unit’s LED’s will not change while making the zero adjustment?
A. Typically when a change in the LED’s cannot be achieved on the zero adjustment it is a sensor problem. A sensor problem could be anything between the wiring from the sensor tips to the electronics enclosure. Check all wiring connections, for a diagram of the correct wiring layout REFER TO FIGURE 7A of the Operation and Maintenance Manual. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. What does it mean when the unit will not toggle while making the span adjustment?
A. In most LEVEL calibrations the J1 jumper must be removed. Observe if the jumper is inserted only on one pin of the J1 header or both pins. By removing the jumper from both pins you are setting up the unit to detect LEVEL. If you are calibrating the unit for LIQUID FLOW the jumper may need to be inserted on both pins of the J1 header. If the J1 jumper is not your problem it could be an application or board problem, seek advice from technical support at the factory.

Q. I am not getting the correct relay logic from the switch?
A. The relay logic is determined by whether you are wired out of the Normally Closed or Normally Open contact and what position the Fail Safe Jumper (J2) is put in. For a diagram of the configuration you desire REFER TO SECTION 5.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad sensor?
A. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad set of electronics?
A. Substitution is the best method of trouble shooting. If you have another unit in the facility, try swapping out the board in question with a known working set of electronics. If no other electronics are available check your sensor by REFERERING TO SECTION 6.2.2 of the Operation and Maintenance Manual or seek advice from technical support at the factory. If the sensor checks out most likely it’s a board problem.

Q. Where do I get a replacement fuse for the electronics?
A. REFER TO SECTION 8.3 of the Operation and Maintenance Manual for a list of parts and part numbers. Use the exact same fuse that is supplied with the unit. Changing the fuse with a different type can void a Cenelec, CSA, or EX rating.

Q. How do I know what voltage to apply?
A. The correct voltage should be marked with an X on the transformer tag mounted on the electronic board. You can also look at the serial number tag on the enclosure for the voltage in the model number code: -110- = 110VAC, -220- = 220VAC, -24D- = 24VDC or -24A- = 24VAC

Q. How far into the process should the sensor be?
A. When installing a switch vertically in a column or tank the Level Switch insertion is user defined and ordered from the factory based on the location of level to be detected. When installing horizontally the insertion typically is not an issue it becomes the user’s point of access into the column and where level detection is desired.

Q. What insertion length should I order?
A. When installing a Level Switch vertically in a column or tank the Level Switch insertion is user defined and ordered from the factory based on the location of level to be detected. When installing horizontally the insertion typically is not an issue it becomes the user’s point of access into the column and where level detection is desired. Insertion length is measured from the bottom of the process connection to the end of the probe tips.

Q. How much amperage is required to operate the switch?
A. At least 0.25A should be supplied to the unit REFER TO SECTION 7.0 of the Operation and Maintenance Manual for the specifications of your switch.

Q. What should I use to clean the probe or sensor tips?
A. The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto the sensor tubes, or by ultrasonic cleaning. Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off once cleaned. For unusual cleaning problems, call DELTA M and determine the exact materials of construction and chemical compatibility before using strong acids or unusual cleansers. REFER TO SECTION 6.1 of the Operation and Maintenance Manual.

FS21NX microtuf®II FAQ

Q. How do you calibrate the Delta M FS21NX Mass Flow Switch?
A. REFER TO SECTION 4.3 of the Operation and Maintenance Manual for the flow calibration procedure.

Q. What does it mean when the unit’s LED’s will not change while making the zero adjustment?
A. Typically when a change in the LED’s cannot be achieved on the zero adjustment it is a sensor problem. A sensor problem could be anything between the wiring from the sensor tips to the electronics enclosure. Check all wiring connections, for a diagram of the correct wiring layout REFER TO FIGURE 7A of the Operation and Maintenance Manual. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. What does it mean when the unit will not toggle while making the span adjustment?
A. First thing to determine is if you are calibrating the unit to detect AIR FLOW or LIQUID FLOW. In most cases when detecting AIR FLOW the J1 jumper must be removed. Observe if the jumper is inserted only on one pin of the J1 header or both pins. By removing the jumper from both pins you are setting up the unit to detect AIR FLOW. If you are calibrating the unit for LIQUID FLOW the jumper may need to be inserted on both pins of the J1 header. If the J1 jumper is not your problem it could be an application or board problem, seek advice from technical support at the factory.

Q. I am not getting the correct relay logic from the switch?
A. The relay logic is determined by whether you are wired out of the Normally Closed or Normally Open contact and what position the Fail Safe Jumper (J2) is put in. For a diagram of the configuration you desire REFER TO SECTION 5.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad sensor?
A. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad set of electronics?
A. Substitution is the best method of trouble shooting. If you have another unit in the facility, try swapping out the board in question with a known working set of electronics. If no other electronics are available check your sensor by REFERERING TO SECTION 6.2.2 of the Operation and Maintenance Manual or seek advice from technical support at the factory. If the sensor checks out most likely it’s a board problem.

Q. Where do I get a replacement fuse for the electronics?
A. REFER TO SECTION 7.0 of the Operation and Maintenance Manual for the Delta M part number. Use the exact same fuse that is supplied with the unit.

Q. How far into the pipe should the sensor be for a good flow switch installation?
A. Ideally in the center of the pipe, but at least 1/3 of the diameter is sufficient in most cases.

Q. What insertion length should I order?
A. Center of the pipe is best for optimal performance, but at least 1/3 of the diameter is sufficient in most cases. Insertion is measured from the bottom of the process connection to the end of the probe tips.

Q. How do I know what voltage to apply?
A. The correct voltage should be labeled with a sticker on the plastic housing of the electronic board. You can also look at the serial number tag on the enclosure for the voltage in the model number code: -AC- = 110-220VAC, -DC- = 24VDC

Q. How much amperage is required to operate the switch?
A. At least 0.25A should be supplied to the unit REFER TO SECTION 7.0 of the Operation and Maintenance Manual for the specifications of your switch.

Q. What should I use to clean the probe or sensor tips?
A. The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto the sensor tubes, or by ultrasonic cleaning. Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off once cleaned. For unusual cleaning problems, call DELTA M and determine the exact materials of construction and chemical compatibility before using strong acids or unusual cleansers. REFER TO SECTION 6.1 of the Operation and Maintenance Manual.

LS11NX microtuf®II FAQ

Q. How do you calibrate the Delta M LS1100 Point Level Switch?
A. REFER TO SECTION 5.3 of the OPERATION AND MAINTENANCE MANUAL for the calibration procedure.

Q. What does it mean when the unit’s LED’s will not change while making the zero adjustment?
A. Typically when a change in the LED’s cannot be achieved on the zero adjustment it is a sensor problem. A sensor problem could be anything between the wiring from the sensor tips to the electronics enclosure. Check all wiring connections, for a diagram of the correct wiring layout REFER TO FIGURE 7A of the Operation and Maintenance Manual. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. What does it mean when the unit will not toggle while making the span adjustment?
A. In most LEVEL calibrations the J1 jumper must be removed. Observe if the jumper is inserted only on one pin of the J1 header or both pins. By removing the jumper from both pins you are setting up the unit to detect LEVEL. If you are calibrating the unit for LIQUID FLOW the jumper may need to be inserted on both pins of the J1 header. If the J1 jumper is not your problem it could be an application or board problem, seek advice from technical support at the factory.

Q. I am not getting the correct relay logic from the switch?
A. The relay logic is determined by whether you are wired out of the Normally Closed or Normally Open contact and what position the Fail Safe Jumper (J2) is put in. For a diagram of the configuration you desire REFER TO SECTION 5.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad sensor?
A. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 6.2.2 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad set of electronics?
A. Substitution is the best method of trouble shooting. If you have another unit in the facility, try swapping out the board in question with a known working set of electronics. If no other electronics are available check your sensor by REFERERING TO SECTION 6.2.2 of the Operation and Maintenance Manual or seek advice from technical support at the factory. If the sensor checks out most likely it’s a board problem.

Q. Where do I get a replacement fuse for the electronics?
A. REFER TO SECTION 7.0 of the Operation and Maintenance Manual for a list of parts and part numbers. Use the exact same fuse that is supplied with the unit.

Q. How do I know what voltage to apply?
A. The correct voltage should be labeled with a sticker on the plastic housing of the electronic board. You can also look at the serial number tag on the enclosure for the voltage in the model number code: -AC- = 110-220VAC, -DC- = 24VDC

Q. How far into the process should the sensor be?
A. When installing a switch vertically in a column or tank the Level Switch insertion is user defined and ordered from the factory based on the location of level to be detected. When installing horizontally the insertion typically is not an issue it becomes the user’s point of access into the column and where level detection is desired.

Q. What insertion length should I order?
A. When installing a Level Switch vertically in a column or tank the Level Switch insertion is user defined and ordered from the factory based on the location of level to be detected. When installing horizontally the insertion typically is not an issue it becomes the user’s point of access into the column and where level detection is desired. Insertion length is measured from the bottom of the process connection to the end of the probe tips.

Q. How much amperage is required to operate the switch?
A. At least 0.25A should be supplied to the unit REFER TO SECTION 7.0 of the Operation and Maintenance Manual for the specifications of your switch.

Q. What should I use to clean the probe or sensor tips?
A. The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto the sensor tubes, or by ultrasonic cleaning. Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off once cleaned. For unusual cleaning problems, call DELTA M and determine the exact materials of construction and chemical compatibility before using strong acids or unusual cleansers. REFER TO SECTION 6.1 of the Operation and Maintenance Manual.

VS5100 & VS51NX VERSA-SWITCH® FAQ

Q. How do you calibrate the Delta M VS5100 Mass Flow Switch?
A. REFER TO SECTION 4.4 of the Operation and Maintenance Manual for the flow calibration procedure.

Q. What does it mean when the unit’s LED’s will not change while making the zero adjustment?
A. Typically when a change in the LED’s cannot be achieved on the zero adjustment it is a sensor problem. A sensor problem could be anything between the wiring from the sensor tips to the electronics enclosure. Check all wiring connections, for a diagram of the correct wiring layout REFER TO FIGURE 20A of the Operation and Maintenance Manual. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 5.2.3 of the Operation and Maintenance Manual.

Q. What does it mean when the unit will not toggle while making the span adjustment?
A. First thing to determine is if you are calibrating the unit to detect AIR FLOW or LIQUID FLOW. In most cases when detecting AIR FLOW the Span plug ends up in the D position. If you are calibrating the unit for LIQUID FLOW the jumper usually works in the C position. Every application is different and the plug could end up in any position but C and D are the most common. If the span jumper is not your problem it could be an application or board problem, seek advice from technical support at the factory.

Q. I am not getting the correct relay logic from the switch?
A. The relay logic is determined by whether you are wired out of the Normally Closed or Normally Open contact and what position (A or B) the Fail Safe Jumper is put in. For a diagram of the configuration you desire REFER TO SECTION 4.3 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad sensor?
A. For instructions on how to determine if you have the correct reading from the sensor, REFER TO SECTION 5.2.3 of the Operation and Maintenance Manual.

Q. How do I determine if I have a bad set of electronics?
A. Substitution is the best method of trouble shooting. If you have another unit in the facility, try swapping out the board in question with a known working set of electronics. If no other electronics are available check your sensor by REFERERING TO SECTION 5.2.3 of the Operation and Maintenance Manual or seek advice from technical support at the factory. If the sensor checks out most likely it’s a board problem.

Q. Where do I get a replacement fuse for the electronics?
A. REFER TO SECTION 8.3 of the Operation and Maintenance Manual for a list of parts and part numbers. Use the exact same fuse that is supplied with the unit. Changing the fuse with a different type can void a Cenelec, CSA, or EX rating.

Q. How far into the pipe should the sensor be for a good installation?
A. When installing a flow switch, the center of the pipe is best for optimal performance. At least 1/3 of the pipe diameter for a flow switch is sufficient in most cases. For Level Switch installations the insertions length is user defined based on the location of level to be detected.

Q. What insertion length should I order?
A. For a flow switch installation center of the pipe is best for optimal performance, but at least 1/3 of the diameter is sufficient in most cases. When installing a Level Switch vertically in a column or tank the Level Switch insertion is user defined and ordered from the factory based on the location of level to be detected. When installing horizontally the insertion typically is not an issue it becomes the user’s point of access into the column and where level detection is desired. Insertion length is measured from the bottom of the process connection to the end of the probe tips.

Q. How do I know what voltage to apply?
A. The correct voltage should be marked with an X on the transformer tag mounted on the electronic board. You can also look at the serial number tag on the enclosure for the voltage in the model number code: -110- = 110VAC, -220- = 220VAC, -24D- = 24VDC or -24A- = 24VAC

Q. How much amperage is required to operate the switch?
A. At least 0. 5A should be supplied to the unit REFER TO SECTION 6.0 of the Operation and Maintenance Manual for the specifications of your switch.

Q. What should I use to clean the probe or sensor tips?
A. The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto the sensor tubes, or by ultrasonic cleaning. Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off once cleaned. For unusual cleaning problems, call DELTA M and determine the exact materials of construction and chemical compatibility before using strong acids or unusual cleansers. REFER TO SECTION 5.1 of the Operation and Maintenance Manual.

Sales FAQ

Q. Where do I return my products?
A. If you believe your unit is not working properly, contact the Delta M Customer Service Department. REFER TO SECTION 8.2 of the Operation and Maintenance Manual for more information and fill out a Return Shipment Form. The form can also be found on our website at www.deltamcorp.com go to Forms then click Return Shipment.