Meriam M2110F SMART FLOW GAUGE - Manual (Page 15)

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7.1.2 RE-ZEROING THE GAUGE / OUTPUTS ENABLED (P5=1, 2 or 3):
1. Gauge in MEASURE MODE with zero flow through primary element
2. Press the UP AND DOWN ARROW KEYS simultaneously
3. If lockout is in-active display will flash 0005 and count down to 0000
• Press PRGM/ENTER before count reaches 0000 to acknowledge warning
• The display will again count from 0005 to 0000
• Press the UP AND DOWN ARROW keys before count reaches 0000
• The display will flash 0000 several times while sampling the new zero
• Gauge returns to MEASURE MODE
4. If lockout is active prompt will be L 00
• Enter Lockout Code
• Display will flash 0005 and count down to 0000
• Press PRGM/ENTER before count reaches 0000 to acknowledge warning
• The display will again count from 0005 to 0000
• Press the UP AND DOWN ARROW keys before count reaches 0000
• The display will flash 0000 several times while sampling the new zero
• Gauge returns to MEASURE MODE
Warning
Never re-zero the gauge when connected to an active controlled process or when known flow is present. The re-
zeroing process will alter the instrument's measurement output and could cause a sudden change in analog or relay
contact outputs.
7.2 FACTORY ZERO
The “Factory Zero” can be restored through the serial interface on the SetPoint and Current Loop gauge models.
This is the factory zero value determined during sensor calibration and is typically 0.0.
7.3 RANGE CHECK
The Smart Gauge can be zeroed only when the measured differential pressure is within
±5% of sensors full-scale
rating. If the applied differential pressure is greater than 5% of the rated value then an error code will be displayed
when zeroing is attempted.