The DR3710 Fix: No More False Readings

$25,000 in Rework Costs: How We Discovered the Hidden Problem

Our hydraulic press was cycling slower, yet the analog gauge showed normal pressure. This discrepancy had been costing us approximately $25,000 each month in rework due to out-of-spec parts. The relief valve wasn’t lifting at the expected bar value, indicating false readings. We needed to investigate the root cause.

What SCADA Didn’t Tell Us About Pressure Spikes

Bourdon tube gauges act as mechanical low-pass filters with a natural frequency of only 1-2 Hz. Consequently, they cannot respond to pressure changes faster than that threshold. This means that sudden spikes, such as those lasting 150 milliseconds, are completely missed. In fact, our analog gauge was blind to these transient events, leading to undetected overpressure conditions and parts out of spec.

How DR3710 Solved Our Pressure Spike Detection Problem

We installed the DR3710 digital pressure gauge, which features a 3.2kHz response frequency—over 1,500 times faster than a Bourdon tube. This capability allows it to capture those brief peaks that analog gauges miss. The DR3710 offers accuracy options from ±0.1% FS to 1% FS, and it displays pressure in bar, psi, kPa, MPa, or kg/cm². Its pressure range from -1bar to 2500bar makes it suitable for our ultra-high pressure applications. Additionally, the gauge includes zero clearing, Max/Min peak value holder, and a high-definition backlight LCD for easy reading.

Why Our Relief Valve Lifts Dropped by 80%?

Within a week, the DR3710 eliminated false readings by detecting even the briefest spikes. As a result, the number of parts out of spec dropped significantly, saving us $25,000 in rework costs each month. Moreover, we discovered that many previous relief valve lifts were actually caused by missed spikes, not true overpressure events. This insight allowed us to optimize our system.

Key Specifications OF DR3710

• Pressure range from -1bar to 2500bar
• Accuracy options: ±0.1% FS, ±0.2% FS, ±0.5% FS, or 1% FS
• Display resolution: -19999 to 19999
• High definition backlight display LCD
• Zero clearing and Max/Min peak value holder
• Ambient temperature display
• Pressure progress bar display
• Battery indicator
• Five pressure units: bar, psi, kPa, MPa, kg/cm²
• Stainless steel 304 housing, IP65 protection
• Response frequency: 3.2kHz
• Power supply: 2 x 1.5V AAA battery

How Many Missed Spikes Are Costing You?

Reflecting on this experience, how many relief valve lifts have you blamed on overpressure that were actually missed spikes? The DR3710 could be the game-changer your facility needs. Consider upgrading your pressure digital gauge to improve pressure spike detection and achieve accurate 1000bar pressure measurement.

Tags: #digitaldigitalgauge #pressurespikedetection #airpressuremeasurement #DR3710