Page 112 February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930
You will also need to enclose a Service Order Form with the shipment, which you will receive when requesting a RMA
number.
Normal servicing time is four to six weeks, but in special cases the service time can be reduced.
A main overhaul and service is recommended at the factory every three years
9.4 Test of ZPulse
®
DCS 4420/4830/4520/4930
We recommend that you perform a function test of the sensor operating in air to verify the sensor readings.
Sensor readings when operating in air:
• The Abs Speed will give a variable reading from measurement to measurement.
• The Direction will normally give variable readings.
• North and East (Speed) will give variable readings.
• The Heading (compass heading) depends on the sensor orientation. Placing transducer 1 towards magnetic
north will give a value close to 0 or 360˚.
• Tilt X and Tilt Y depend on the sensor tilt. If the sensor is placed horizontal, both should be close to 0˚.
• The SP Std will normally give a reading below 20 cm/s.
• The Strength will be close to -70dB.
• The Ping count depends on the ping setting.
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