Emerson ROSEMOUNT 5300 Spezifikationen PDF herunterladen (Seite 50)

Reference Manual

00809-0600-4026, Rev BA

December 2011

Rosemount Process Radar

4-6

Step 3. Echo-Curve

Verification at Operating

Conditions

At normal operating conditions, download and review the echo-curve

according to the following steps:

1. Check Reference Pulse amplitude and position

Compare the result against the previous plots, taken during cold start-up.

2. Review peak amplitudes and threshold settings

Verify that the surface and/or interface peaks are visible and that the

thresholds have been set as described in threshold settings. See table

below for rough guidelines of amplitudes. For information on threshold

settings, see “Threshold settings“ on page 4-3.

3. Store the echo-curve

Permanently store the echo-curve for future use, with re-occurring

verification procedures.

Figure 4-5. Peak amplitudes and

threshold settings

Table 4-1. Typical peak

amplitudes for Rosemount 5300

Series with single lead probe in

4 in. chambers

Common Problems and Recommended Actions

• Surface pulse not detected

UNZ

Surface

peak

Interface

peak

Interface

threshold

Surface

threshold

Reference

peak

Distance

Amplitude

Peak

Approximate signal strength, ideal

conditions for single lead probe in 4 in.

(100 mm) chambers

Reference peak

~10,000 mV

(1)

(1) This value does not apply and may be considerably lower when the probe is completely submerged

in product.

Surface peak, 5301 with oil (DC=2) ~2,000 mV

Surface peak, 5301 with water (DC=80) at

3 ft (1 m) distance

~10,000 mV

Interface peak, 5302 with oil and water ~8,000 mV

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 105 106

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