The OFL Troubleshooting for weighing transmitter GMT-P1

 

 

 

In this article, we are going to share the weighing indicator OFL troubleshooting method.

Four main Causes for OFL:

1. Calibration error

2. Load cell install or wiring error

3. Overload or signal output below the zero point

4. Load cell or weighing indicator AD failure

 

 

Demonstrate Equipment: 

1. GMT-P1 weighing transmitter

2. A weighing platform and One 100g weight

3. A Multimeter 

 

Step 1,

First, we consider calibration error resulting in OFL, so we need to recalibrate the indicator. Enter the menu options, open the calibration menu, skip the previous decimal point, the division value, the range settings, to reach the load cell's current millivolt number display interface. If it shows the correct millivolt data, we enter the zero calibration menu, empty the weighing platform. Then, setting the gain calibration, place the weight on the weighing platform, and enter the right weight. The calibration is complete. We can move back to the menu interface to see if it has the proper weight display.

 

Step 2,

Suppose the load cell's current millivolt does not display properly. We can remove the load cell wiring from the GMT-P1’s terminals and use our multimeter to test the voltage between EX+,EX-. If the voltage cannot be measured, the AD part of the indicator has been damaged. If the voltage can be detected, move to step 3.

 

Step 3,

Remove the SIG+ and SIG- ends from the load cell wires, press on the weighing platform, meanwhile use a multimeter to measure the voltage between SIG+ and SIG- to see if the voltage is within a reasonable range (check the corresponding parameters of the load cell)

If the voltage is within the range and there is a change, we can estimate the OFL caused by overload weights or signal output below zero. If it is not within the range, we consider the AD part is damaged.

In this case, please contact your local equipment suppliers for help.

 

Step 4,

If it is not the above 3 problems, check if the loadcell gravity label is consistent with the direction of gravity, and check if the load cell wiring is correct. Or you can replace the load cell to exclude the load cell’s problem. 

 

That's all for OFL troubleshooting for GMT-P1. Don't forget to give us a like and follow us.

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General Measure Launch Weighing Transmitter GMT-P1 of Harsh Mount Version

 The basic but universal weighing transmitter GMT-P1 now has the harsh wall/desk mount version, which offers stable performance under harsh industrial environments. It is designed for dynamic weighing systems with high demands for reliability, response speed, and accuracy.

 

• OIML R76/2006 6000e Approval
• Calibration ability up to 1,000,000d
• Vibration cancellation filter
• Calibration without test weights
• Communication option: RS232/485, analog output, Modbus TCP/IP, Ethernet IP
• Panel mount or harsh mount available.

 

Please contact us for free GMT-P1 sample testing.

Various Applications of General Measure Checkweigher in Different Industries

 

 

 

General Measure ChexGo series checkweigher has a wide weight range from 1g to 60kg by different models. With the stainless steel housing, it can work well in the harsh industrial environment and high hygienic standard environment.

 

Tobacco Pack Case

CW-600G was installed in the production line for the tobacco pack weight check. Ensuring the standard weight of 50g each pack, CW-600G will reject the underweight or overweight packs(±5g).

 

Flour Package Case

CW-600G and CW-1.2K were applied in this case. The stainless steel and FDA-approved belt reach FDA hygienic standards for the food industry.

 

Condom Pack Case

Each pack has 5 condoms each of which weighs 7g, in total around 46g. Checkweigher with the swing arm rejector will reject the pack when it is under 45g or over 47g to make sure each pack has the right number of products.

 

Assuring 100% of product weighing detection under the law and regulation will reduce the customer complaints and protect enterprise fame. Whilst replacing the manpower to lower the cost, ChexGo can help you increase the efficiency of the production line and avoid risks.