Description

3500/20 125744-02 The general approach for testing alarm setpoints is to simulate the Acceleration

signal with a function generator and power supply. The alarm levels are tested by

varying the output from the test equipment and observing that the correct results

are reported in the Verification screen on the test computer. 3500/20 125744-02 It is only necessary

to test those alarm parameters that are configured and being used. The general

test procedure to verify current alarm operation will include simulating a

transducer input signal and varying this signal:

to exceed over Alert/Alarm 1 and Danger/Alarm 2 Setpoints, and
to drop below any under Alert/Alarm 1 and Danger/Alarm 2 Setpoints, and
to produce a nonalarm condition.

brand	Product Name	Product model	Order No
BENTLY	modular	3500/20 125744-02	nothing
Place of Origin	Marketable land	Imported or not	defects liability period
Europe and America	Nationwide and overseas	yes	a year
Place of shipment	Delivery method	How to use	Applicable industries
Xiamen	Shunfeng Express	Commissioning and installation	Power Plant Steel Plant Cement Plant Shipboard Papermaking
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Product features	Primary source of goods, supply by model	After sales guarantee	Chen 1806092-3929

When varying the signal from an alarm condition to a nonalarm condition, alarm

hysteresis must be considered. 3500/20 125744-02 Adjust the signal well below the alarm setpoint for

the alarm to clear.

Direct

Disconnect PWR / B, COM, and SIG / A field wiring from the channel

terminals on the I/O module.

Connect test equipment and run software as described in Section 5.1.8.1

(Test Equipment and Software Setup – Acceleration). If no filtering has

been configured, leave the frequency of the function generator set to 100

Hz. If filtering is configured, 3500/20 125744-02 the needed frequency can be calculated from

the following formula:

HPF = High-pass Filter Corner Frequency

LPF = Low-pass Filter Corner Frequency

If no filtering is configured, set the frequency of the function generator to

100 Hz.

3500/20 125744-02 If a low-pass filter is configured and no high-pass filter is configured, use

the following to determine the HPF to use in the formula:

– If the units are integrated or rms, use a HPF of 10 Hz. For any other

configuration, use a HPF of 3 Hz.

If a high-pass filter is configured and no low-pass filter is configured, use

the following to determine the LPF to use in the formula:

– If the configuration is a single channel with no integration, use a

LPF of 30 kHz.

– If the configuration is a single channel with integration, use a LPF

of 14.5 kHz.

– If the configuration is a dual channel pair, use a LPF of 9.155 kHz.

Set the frequency of the function generator to this new value. 3500/20 125744-02 The above is done

to obtain a test frequency in the center of the channel frequency range.

Adjust the function generator amplitude to produce a reading that is

below the Direct setpoint levels on the Direct bar graph display of the

Verification screen.

Press the RESET switch on the Rack Interface Module (RIM). Verify that the

OK LED is on, the bar graph indicator for Direct is green, and the Current

Value field contains no alarm indication.

Adjust the function generator amplitude such that the signal just exceeds

the Direct Over Alert/Alarm 1 setpoint level. Wait for 2 or 3 seconds after

the alarm time delay expires and verify that the bar graph indicator for

Direct changes color from green to yellow 3500/20 125744-02 and the Current Value Field

indicates an Alarm.

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BENTLY 3500/20 125744-02 Cylinder Pressure Monitor

Description

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