OTC 4291 Manual Del Usuario página 5

Installation guidance
1. Although the unit is bi-directional, which means it can be used in both flow directions, the preferred direction
is indicated on the block. When the flow meter is used for reverse flow tests, slightly lower accuracies may be
obtained depending on the oil viscosity, density and compressibility.
2. The unit can be connected to the hydraulic circuit by means of flexible hoses or rigid pipes, 8" (200 mm). The use
of quick-disconnect couplings can save time. The hoses and fittings at the inlet to the unit must be of adequate
size for the flow being tested. Elbows, rotary couplings etc., at the inlet and outlet ports should be avoided to
ensure accurate readings.
3. Connect the cable and micro-bore hose assembly at the readout; then connect to the unit. IMPORTANT, after
testing, disconnect at the unit first to avoid oil spillage.
4. After installing it is important to ensure that all connections are tightened and the oil can flow freely throughout the
hydraulic system BEFORE running the machine at full speed. Check that the circuit is correctly connected and the
load valve is fully open; also quick disconnect couplers MUST be open. IMPORTANT: Start the pump momentarily
to ensure there is no obstruction that could cause pressure build-up.
5. Ensure that the appropriate calibration factor is entered.
6. The 4292 readout has an automatic electronic system which shuts the power off after approximately 15 minutes
should you forget. To reactivate, press the ON key.
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