FAQ

タブV2

Ultrasonic Flowmeter
Microwave Level Gauge

UFP-20

FAQ for Portable Ultrasonic Flowmeter

When the measurement error occurs

- Please check the condition of pipe.

・Is the inside of pipe full of water? Is there any liquid in it?
→ UFP-20 can only be used in full of water.

・Are there any bubbles inside the pipe?
・Are there any rusts or scales inside the pipe?
・Are there any sediments inside the pipe?
・Are there any paint peelings on the pipe?
   →   Measurement may be impossible if there are bubbles, rusts, scales, sediments or paint peelings.
   We recommend to measure the pipe without such conditions.
If you face such difficulty, re-locate the installation position.
・Are there any insulation materials on the pipe?
   →  Measurement cannot be taken through the insulation materials.
   You may need to remove the insulation materials.

-Please check the condition of sensor.

・Is the sensor installed perpendicularly to the pipe surface? Is it installed at an angle?
→ Please install the sensor perpendicularly to the pipe surface.

・Are the upstream and downstream sensor reversed?
・Did you apply a couplant on the sensor?
→　Measurement cannot be taken if couplant isn`t applied.

・Is the sensor installed closely to pump outlet?
　→　Near the pump outlet, it is easy to bubble. Please install the sensor apart from the pump outlet.
・Is the sensor installed on pipe welding?
　→　Please don`t install the sensor on the pipe welding.
・Is there a flange between sensors?
　→　The flange will affect the ultrasonic transmission.

- Please check the setting value.

・Did you enter a nominal diameter in the outer diameter field?
・Did you enter the thickness field?
・Is the pipe type setting correct?
・Is the sensor cable connected? Isn't it loose?

- About Measurable Pipes

【○】 Measurable Pipes

- SUS pipe
- Steel pipe
- Castings, Ductile Casting pipe
- SGP pipe (However, it may be difficult for ultrasonic to propagate in SGP pipes.)
- PVC, HDPE pipe
- FRPM pipe, etc.

【×】 Unmeasurable Pipes

- Hose (resin)
- Bellows
- Cement pipe
- Press-fitted lining pipe (However, pipes that are melted or painted are measurable.)

【△】 Pipes depend on the situation

- Asbestos pipe : Generally difficult to measure.
- FRPM pipe : Generally difficult to measure.

- About Measurable Fluids

【○】 Measurable Fluids

- Ammonia water : Aqueous solution can be measured.
- Brine solution (room temperature)

【×】 Unmeasurable Fluids

【△】 Fluids depend on the situation

- Slurry : Depends on concentration.
- Brine solution (less than zero degreeC)
- Detergents that foam easily are difficult to measure.

Others

- R1 error occurs

First, please check if there are any mistakes in the setting values. Also, please refer to “When the measurement error occurs”

- A value is calculated when the fluid is not flowing

A value is calculated when the water inside the pipe is swaying. Even if the flow is stopped, convection still occurs inside the pipe. If you are concerned about this, please use the zero cut function.

- How can I measure various pipes with one device? How many sensors would I need?

Since UFP-20 is a portable flowmeter, you can measure various pipes with one device. However, the measurable diameter depends on the sensor type, so it is necessary to replace the sensor according to the pipe diameter.

- Small Sensor: From 13A to 50A
- Medium Sensor: From 65A to 500A
- Large Sensor: From 300A to 5000A

- If the AC cable is connected, can I continue to get a data?

Yes, it's possible. For logging, it depends on the logging capacity.

- Can I use UFP-20 with the AC cable plugged in?

Yes, you can use UFP-20 with the AC cable plugged in. However, the battery will not be charged while UFP-20 is on.

- Can the required straight pipe length be shortened by using 2-path measurement?

No, it can`t. Multi-path is one way for stable measurement. Generally, the straight pipe length required for the ultrasonic flowmeter is 10D or more on the upstream side of the sensor, and 5D or more on the downstream side to ensure accuracy. For straight pipe length, please refer to UFP-20 manual p.3-16.
* D is the pipe diameter.

- How far apart should I install sensors from the existing ultrasonic flowmeter, and will the ultrasonic interfere with each other?

There is no solid data. Please install sensors from the existing ultrasonic flowmeter as far as possible.

- About analog cable extension

The analog output cable is 3m. Extension is possible if you do it yourself.

- What is the minimum measurable flow rate?

You can measure from -30m/s to 30m/s.

-Which USB do you recommend for UFP-20?

Please choose one with no password and a small capacity. (up to about 16GB)

- UFP-20 won't turn on.

・Did you press the power key correctly? (Press and hold for more than 3 seconds.)
・Is the battery or AC adapter connected correctly?
・Is the battery charged?
・Isn`t the contrast setting low?

- LCD display is dark.

Did you adjust LCD brightness/contrast setting? (Please refer to UFP-20 manual p.1-12.).

- LCD display disappears.

・Isn't sleep mode enabled? (Please refer to UFP-20 manual p.2-45.)
・Didn't you get too much static? (Refresh the screen with 【SHIFT】+【.】 keys.)

- Unable to operate keys.

Isn`t 【SHIFT】 key enabled? Press 【SHIFT】 to release it.

- Log file disappears when UFP-20 is turned off.

Did you see a message to replace the backup battery when you turned UFP-20 on? If you saw the message, you need to replace the backup battery. Please contact us.
If you already have a log file, make sure to copy it to USB memory before turning it off.

- The date and time are initialized when the power is turned off.

Did you see a message to replace the backup battery when you turned UFP-20 on? If you saw the message, you need to replace the backup battery. Please contact us.

- Flow rate does not change.

- Is R1/R2 displayed on the top of LCD? (Ultrasonic is not being received properly. Please refer to UFP-20 manual p.3-28.)
- Is D1/D2 displayed on the top of LCD? (Obstacles are being detected. Please refer to UFP-20 manual p.3-28.)
- Is E1/E2 displayed on the top of LCD? (The parameter in the settings file is inappropriate and cannot measure correctly. Please refer to UFP-20 manual p.2-18.)

- USB memory is not recognized.

Some USB may not be recognized. Please try removing and reinserting the USB again. If the USB is still not recognized after removing and reinserting, please try using one from another manufacturer. A secure digital card is not supported.
Also, please use USB memory without the password.

- The battery cannot be charged.

・The battery can be charged at approximately 0 to 50°C and will automatically stop charging outside this range. (Please refer to UFP-20 manual p.1-17.)
・There is a possibility that the AC adapter is broken. (Remove the battery and check if it works.)
・There is a possibility of battery failure or deterioration.
・There is a possibility that the battery is not connected to the main unit.

KRG-10

FAQ for Radar Level Gauge

- Which liquids can be measured with KRG-10?

→ KRG-10 can measure liquids with a dielectric constant of 1.8 or higher. Please refer to the table for dielectric constant. If the liquid is not on the table, please consult us.

- Which liquids cannot be measured with KRG-10?

→ It is difficult to measure liquids with a dielectric constant of 1.8 or less.
Also, ammonia may not be measured because it absorbs microwaves when vaporized. Please refer to the table for dielectric constant.
The table of dielectric constant

- Can KRG-10 measure liquids with low dielectric constant?

→ KRG-10 can measure liquids with a dielectric constant of 1.8 or higher.
Please refer to the table for dielectric constant. If the liquid is not on the table, please consult us.

- Can liquids be measured even if bubbles occur?

→ It can be measured if the liquid surface is visible, but it depends on foam.
We can advise you if we could get the information of the site. E.g) drawings, photos or videos of measurement situation.
Please consult us when you have such a situation.

- Does liquid color affect the measurement?

→ Liquid color doesn`t affect the measurement.

- Can the powder be measured?

→ No, KRG-10 is designed only for liquid measurement.

- Can liquids be measured in a tank with an agitator?

→ It depends on the location and distance, but there are many measurement records in tanks with structures such as the agitator.

- Can I measure a volume in the tank?

→ Yes, it`s possible. KRG-10 has a function of converting the water level into volume.

- Do you have an indicator as option?

→ No, we don't sell any indicators with our brand. You can use digital panel meters in the market.

- Do you have a protect cover as option?

→ A rubber cap is attached basically. If a protect cover is required separately, please consult us. We can prepare it as an option.

- Is the flange included?

→ Flanges are optional, but we are also able to offer them.

- How many millimeters is Hold off distance?

→ It depends on the antenna. Please see the table below. We call Dead band as Hold off distance.

Hold off distance (Dead band)
2B Cone Antenna	136mm
4B Cone Antenna	436mm
2B/3B/4B PTFE Antenna	100mm
1B Rod Antenna	186mm

- Can I use the relay output?

→ Relay output is not available. Please use an alarm setter, etc.

- Does KRG-10 need maintenance?

→ The radar level gauge is basically maintenance free because it doesn`t have mechanical operation parts.

- How many kilograms does the product weigh?

→ It depends on the antenna. Please see the table below.

Weight
Transmitter Head	About 3kg(with LCD), About 2.9kg（No LCD）
2B Cone Antenna	About 1kg
4B Cone Antenna	About 1.4kg
2B PTFE Antenna	About 1.2kg
3B PTFE Antenna	About 2.0kg
4B PTFE Antenna	About 2.5kg
1B Rod Antenna	About 1kg

- KRG-10 can be painted with salt resistance as option?

→ No, We cannot paint salt resistance as option.

General