Maintenance - Tuthill Fill-Rite Tn700 Series Eigentümer-, Einbau-, Betriebs- Und Sicherheitsanleitung

The flow meter must be installed in the system free of pipe stress. Pipe stress can deform the flow meter chamber,
resulting in loss of accuracy. TN Series meters should be secured to a mounting support. Never use the piping as
the sole source of support.
Apply pipe compound to the male threads. Do NOT use PTFE sealing tape.
Flush the system prior to installation of the flow meter.
SLOWLY fill the system with liquid, to avoid operation on air or vapors. Do NOT pump at full capacity until all
air has been purged. We recommend that:
• Throttle the valve on flow meter inlet side, and allow the system to fill slowly by gravity.
• Open the outlet valve. Start the pump, and then slowly open the inlet valve. In this manner slowly
fill the flow meter before fully operating the inlet and outlet valves.
The flow meter is not designed to operate on air, but the design and materials of construction allow for operation
on vapor for short periods of time, without damage to flow meter internals. Overspeeding and operation with 'water
hammer' conditions are likely to cause damage to the flow meter.
If the meter is to be shut down for an extended period of time, it is recommended that the measuring chamber of
the meter be thoroughly flushed out to prevent the settling out of un-dissolved chemicals or the accumulation of
corrosive deposits.
Flow Meter Calibration
• Fill-Rite Meters are calibrated prior to shipment. TN Series meters are calibrated for viscosity of a specific
liquid, but we recommend flow meters be recalibrated after installation. Please see procedure outlined below.
• There are no fixed rules for frequency of re-calibration. Flow meter wear is a function of flow rate vs. model
size, total volume metered, liquid lubricity and liquid viscosity. An annual re-calibration is often suggested, but
from 6 to 36 months could be correct.
• Maintain records of re-calibration data. By tracking degree of change in each re-calibration, you can
monitor when the flow meter should be serviced with a new measuring chamber (when degree of change
increases significantly).
• When re-calibrating, we recommend testing the flow meter on the normal fluid of operation. If system flow
rate is constant, you can test at this flow rate only. If system flow rate fluctuates, you should test at high,
intermediate and low flow rates.
Mechanical Register:
1. You can test against a prover, a master meter or a scale. To test against a scale, select a calibration vessel with
capacity equal to at least 60 seconds of flow. Short run tests are not acceptable for re-calibration purposes.
2. Run 3 tests at each flow rate, and use the average value to calculate flow meter error (see below).
The calibration screw has approx. 6% range (+/-3%). If meter error exceeds 3%, a gear change is necessary.
• If the register is showing too little, turn the calibration screw to the right.
• If the register is showing too much, turn the calibration screw to the left.
3. Run 1-2 more tests to confirm that the flow meter is now in calibration.
Calculating meter error:
Test 3 times, so any test with operator error will stand out. Reject such results, and use the average of the
remaining results for calculation purposes.
Preventative Maintenance
Preventative maintenance consists of periodic inspection and cleaning procedures. The procedures should be
performed at regular intervals and any defects discovered should be corrected before further operation of the flow
meter.
Installation (continued)
Start-Up & Operation
Shutdown Instructions

Maintenance

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