MultiRAE - Shawcity Limited

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2.9). Turn monitor on in diagnostic mode and put unit into programming. Press [N] until you reach “Change Sensor Configuration” press [Y]. Press [N] until you reach “change Lamp Type” press [Y]. If the monitor agrees with the lamp you have installed hit [Y], other wise press [N] until the correct lamp is displayed. Press [Y] and the unit will ask to save, press [Y] again to save. 4.5.5 Unless you are using the dilution ration to extend the range of the PID or to add O2 to an LEL stream, the dilution ration should be 1. (See TN-167 for proper use of the dilution fitting) 4.6 Alarms 4.6.1 The MultiRAE has several types of alarms, which can be distinguished by the rate at which the unit beeps and by the messages on the display. See section 2.5 of the operation manual for a full listing of alarms and messages. When a sensor output exceeds an alarm setting, the unit will beep at 1, 2, or 3 beeps per second, and the sensor, which is causing the alarm, will flash on the LCD. The newest versions of the firmware also flash the name of the alarm in the sensor position (High, Low, STEL, etc.). 4.6.2 If Alarm Latching is ON then the alarm will continue to beep even after the condition which caused the alarm has been cleared. Press the [Y] key to clear the alarm. For example, testing with 100 ppm isobutylene will cause a high alarm (with the factory default alarm limits) on the VOC. If the alarm is latched, then the unit will continue to beep even after the gas is removed. Alarm latching can be set or reset from the ProRAE- 50 program or from the “Change Monitor Setup” sub-menu in the programming menu. The pump alarm is always a latching alarm and must be acknowledged before it will turn off. 4.6.3 An alarm at 1 beep per second with a flashing sensor symbol indicates that the STEL or TWA limit has been exceeded. This alarm may continue to beep even after removal of the gas, which caused the alarm, because of the time averaged nature of these alarms. Use the [MODE] key to examine the STEL and TWA value screens to determine if this is the reason for the alarm. The only way to clear this alarm is to turn the unit off and then on again. 4.6.4 If the LEL sensor exceeds 100% LEL, the LEL sensor turns off, for safety reasons. The alarm will beep at 3 flashes per second and the “LEL Off” message will flash on the screen. The unit must be powered off to restart the LEL sensor. 4.7 PC Communication Problems 26
4.7.1 Serial communications is a simple and reliable method of exchanging information between devices. Problems can arise from failure of the PC, failure of the unit, problems with the cable, or operator error. A serial port tester, which is nothing more than a box with a male connector on one end, a female connector on the other end, and a bank of LEDs for each line, is an extremely valuable, yet inexpensive, tool for diagnosing serial communication problems. It is connected between the two devices. The LEDs show the status of each line at a glance. 4.7.2 Keep a spare serial cable for testing. Cables do break from time to time. If there is a serial communication failure, first try a different cable, or try a known good unit with the cable. If the cable tests well, then try the following tests. 4.7.3 The most common PC problems are incorrect port selection, interference by a serial mouse, or failure of the serial port. 4.7.4 If the port selected is not available on the PC, then Windows will provide an error message. 4.7.5 If the MultiRAE is not in “Ready” mode it will not respond to serial communications. Press the [MODE] key until the “Communicate with PC” window appears. Press [Y] Answer [Y] to “Monitor will pause OK” The display then reads “Ready” and the unit is waiting to communicate. If no messages are received after a timeout period, then the unit will remain at “Ready” but will no longer communicate. Press [Mode] until you reach the communications and try again. 4.7.6 If the port is available, but it is not the one the MultiRAE is connected to, there will be a time out error. This will also happen if the port is the correct port but is not transmitting properly. The port tester can quickly identify if the port is the correct port. When sending a message to the MultiRAE the LED on the transmit line from the PC should blink. If it does not, then nothing is being sent out this port. 4.7.7 Similarly, the port tester can show if messages are being sent from the MultiRAE. The receive line from the PC should blink when the MultiRAE is sending data to the PC. If you see the PC transmit line blink and do not see the receive line blink in response, then the unit is not responding. It must be returned for service. 4.7.8 A “NAK received” message from ProRAE-50 could have several causes: Check the cable and connections. Check for proper operation of the serial port. Try reloading the ProRAE program, as corrupted files could also cause this error. Try reloading the firmware. If all of the above fail, the unit must be returned for service. 27
Page 1 and 2: MultiRAE MULTIPLE GAS MONITOR (PGM
Page 3 and 4: III. Trouble Shooting Guide: PGM-50
Page 5 and 6: Random characters on the LCD No res
Page 7 and 8: Software versions 1.05 and later al
Page 9 and 10: 1.1.2 Carefully remove the battery
Page 11 and 12: Battery capacity Discharge time 900
Page 13 and 14: 2.1.3 Check the tubing between the
Page 15 and 16: It is always good to run the unit f
Page 17 and 18: sensors require time to warm up bef
Page 19 and 20: 2) Pump current > stall current mea
Page 21 and 22: 3.1.3 If the unit will still not tu
Page 23 and 24: 4.1.5 Select the most recent .AO7 f
Page 25: function, which is the last selecti
Page 29 and 30: QUICK REFERENCE GUIDE MULTIRAE CALI
Page 31 and 32: PGM-50 Diagnostic & Service Procedu
Page 33 and 34: PGM-50 Diagnostic & Service Procedu

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