REMOTE INTELLIGENT SENSOR - AREA MONITOR
If the ‘O’ ring is left on the purge spigot the new cassette will not seat fully and faulty tape handling will occur.
Push the new cassette firmly into position. When doing so make sure that the tape enters the open gate and does not catch on the side and break.
If the tape is not tight and in the correct position to enter the gate, carefully tighten it by turning the take up spool.
It is not necessary to touch the tape directly. Touching the tape with bare fingers is undesirable because of chemicals used to impregnate the tape.
When the cassette is in position, close the tape gate and press the tape reset button to reset the tape counter (to 99%) and initiate a new cycle.
NOTE: It is recommended that before exiting TEST Mode, the System Parameters are checked as described in Section 2.8.2. The check takes a few minutes and ensures that the system is in optimum adjustment.
Exit the TEST Mode by pressing the red button inside (on the door) again and close the door. Tighten the door screws and take care not to over tighten them. The above procedure is summarized in the following:
Disable external alarms & warn staff. Open door and enter TEST Mode. Remove old cassette, check for retained ‘O’
ring.
Fit new cassette and close gate.
Press tape reset button & observe tape step. Check system parameters.
Exit TEST Mode and close the door.
2.8.2CHECK AND ADJUST SYSTEM
PARAMETERS. This procedure can be carried out if a system fault is reported, as a routine check after cassette replacement, or at any other time it is necessary. The full sequence of data displayed in the TEST Mode depends upon the options fitted to the particular system. All tests are given below for completeness.
The parameters that are normally checked at cassette change are: V system voltage, mA the current, Light Levels track 1 & 2, and Flow Rate. The others are set values that do not change unless the system is switched off.
Entering the TEST Mode. Open the RIS door, having taken precautions against causing unnecessary alarms, and enter the TEST Mode by pressing the red button on the rear of the door. Each of the TEST Mode displays remains for 3 seconds before stepping to the next parameter.
This cycling of data repeats continuously until the HOLD/RELEASE key is pressed to hold a displayed parameter; or the TEST Mode button is again pressed to exit the mode; or five minutes passes. After five minutes an automatic return to the NORMAL mode occurs.
2.8.2.1V, System Voltage. The first displayed data is system voltage. This is the regulated voltage derived from the nominal 12 VDC external supply at the system interface. The displayed value should be 6.9 ± 0.1V.
If adjustment is required, first press the HOLD/ RELEASE key to hold the display. Adjust by turning potentiometer VR1 located on the base board near the system switch SW1 (NOTE: See Supplement A for older version PCB's). When adjusting, do so cautiously and allow time for the battery voltage to settle to the new value. Recheck the voltage 10 minutes after adjustment.
2.8.2.2mA, ‘Charger Current’. This display shows the system current taken under the test conditions. Pump current is not included because the pump is not running during this part of the test cycle.
The displayed current, in mA, is the total of that taken by the system, (excluding pump), and the battery charging current. A ‘normal’ reading is about
Note that if the system voltage is lower than
6.9 V, the charge current will be proportionately higher. A mA reading that is much higher than the range shown above suggests a discharged or faulty battery if the system volts are correct.
2.8.2.3Alarm Set Point. The numerical value in ppb, or ppm, (system dependent) is shown with the ‘flashing bells’ icon. If the set point has not been changed, the default value will be active. Default values are shwon in Table #1.
To change the set point value, ‘hold’ display with the HOLD/RELEASE key. At this point the least significant digit will flash and it can be changed as required by pressing the DIGIT key. Each press steps one digit more. Press firmly.
When the first digit is selected, step to the next higher decade by pressing the DECADE key. Again use the DIGIT key to select the required number, and so on. On completion, press the HOLD/RELEASE key to allow the sequence of test data to continue.
2.8.2.4Alarm Level 1 and 2. When the Relay alarm option is fitted, there are two Alarm Levels and each may be user adjusted. Both Alarm Level set ponts are displayed in sequence when the option is fitted.
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