Ronan X90 Series Manuel d'utilisateur télécharger pdf (Page 6)

module is not necessary in order to change wiring.

Grommeted holes are provided on the top and

bottom surfaces of the chassis for cable entry and

exit. Overall dimensions are 7.25” high X 4.5” wide

X 5.75” deep (18.42 cm X 11.43 cm X 14.6 cm).

Refer to drawing number C-1359-K for terminal

designations for power wiring and hook-up to the

remote probe driver board.

7.3 Integral Model X90-1005

Refer to drawing A-1697-K for rear-panel input

power wiring connections and relay contact wiring

connections.

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8.0 CALIBRATION CONTROLS

The following front-panel controls are used in the set-up

procedure.

ZERO CONTROL is used to provide a zero voltage

signal at TP-AMP with the process level below the point

of measurement, under conditions of maximum radiation

at the G-M tube.

SPAN is used to provide a + 1.0 voltage signal at TP-

AMP when the process level is above the point of

interest, under conditions of no radiation on the G-M

tube.

Three light-emitting diode (LED) DISPLAYS are

provided. These indicators will signal normal and level

alarm for process conditions and failure alarm.

The AMP TERMINAL is the output of the voltage

integrator. This output increases as the radiation on the

tube decreases and vice versa.

Calibration should be attempted only after all system

components have been securely mounted in position and

power and other connections made where required.

Check also that the correct jumpers have been installed

on the X90-301(V) or X90-1005 printed circuit board.

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9.0 CALIBRATION—GENERAL

The output at the AMP terminal is a measure of level

present at the detector. This reading will be minimum or

near zero when the detector is fully irradiated (no

process) and the maximum or near 1.0 V when there is

process material between the source and the detector.

Therefore, for calibration any option, two voltage

readings are generated: 0.0 V with no process between

the source and the detector and + 1.0 V with process

between the source and the detector.

9.1 Calibration with Process Material

a) Switch on the power to the X90 and turn the

shutter handle on the source holder to the ON

position. Turn the SPAN control clockwise 20

turns; then 10 turns counterclockwise.

b) Lower the process level below the set limit and

adjust the ZERO control so that the AMP terminal

output is zero.

c) Raise the process level above the set limit and

again measure the voltage at the AMP terminal.

d) Adjust the SPAN control to obtain a reading of +

1.0 V at the AMP terminal.

After the switch has been calibrated using the

above method, the operation of the control relay,

NORMAL and ALARM indicators should be

checked by raising and lowering the process level

about the set limit. If all these operate as required,

the switch is considered calibrated.

9.2 Calibration without Process Material

a) Turn the source holder shutter to the ON

position.

b) Turn the SPAN control clockwise 20 turns; then

10 turns counterclockwise.

c) Take voltage reading at the AMP terminal.

Adjust the zero control to obtain an average 0.0 V

reading at the AMP terminal.

d) Turn the source OFF.

e) Adjust the SPAN control for an average + 1.0 V

reading.

f) Turn the source back ON for operation.

9.3 Time Delay

If false alarms occur, increase the time delay by

moving the delay jumpers on the printed circuit

board to a higher value.

9.4 Response Time

The response time of the amplifier is 0.5 to 40

seconds, depending on the SPAN setting.

Device

Install

High limit switch

High and G

Low limit switch

Low and G

Process alarm only

A-10, B-11, C-12

Process alarm and failure

alarm

Failure relay and D-10, E-11,

F-12

Delays

Select one: 0.1 sec., 5 sec.,

10 sec., 20 sec.

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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Ronan X90 Series Manuel d'utilisateur Page 6

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