Stimmen - 3, Durchschnittliche Bewertung: 4.3 ( )

Hersteller: Sierra Monitor Corporation Dateigröße: 808.99 kb Dateiname: Unterrichtssprache:

To calibrate the 4 mA and 20 mA outputs it is necessary to have an amp meter connected to the 4501-XX and upon selecting the 4 mA output calibration then the [^] or [Ў] keys can be used to adjust the 4 mA reading on the amp meter until it reads 4 mA. Similar steps can then be performed for the 20 mA output. Page 11 of 33 Model 4501-XX Toxic Gas Sensor Module Key Function Display Description Reference H2S XX PPM Default Display (example 4501-05) ME Mode H2S CALIB: .• ME Down H2S SETUP: .• Gas Range Adjustment Example ME Enter Range S.P. Function - Range Adjust .• ME Enter H2S *100 PPM Select [E] to select or .or . to select another and press [E] .• ME Down H2S 10 PPM Press [E] if selecting 0-10 PPM range .• ME Down H2S USER Press [E] if selecting User adjustable range .• ME Enter H2S 100 PPM Select [E] to select or .or . to select another and press [E] .• 4-20 mA Adjustment Example ME Down H2S 4-20mA S.P Function 4-20 mA Calibrator .• ME Enter H2S Calib S.P. Function - Calib Adjust .• ME Enter H2S Out: 4mA Use .or . keys to select 4 mA or 20mA .• ME Enter H2S 4mA Selects 4 mA .• ME Enter H2S ACK Momentary Acknowledge of new Set Point .• Table 5-3 Set-Up Configuration Page 12 of 33 Model 4501-XX Toxic Gas Sensor Module 5.5 MAINTENANCE SUB-MENU The maintenance menu enables the operator to view sensor and software versions. Sierra Monitor technical support has access to other values as needed. The maintenance menu operation is described in Table 5-4. Key Function Display Description Reference ME Mode H2S XXX PPM Default Display(example 4501-05) .• ME Enter H2S CALIB Go to previous maintenance menu item .• ME Down H2S SETUP: .• ME Down H2S MAINT: .• ME Enter H2S VX.XX Version number of firmware .• ME Enter H2S: CCC001 Configuration Version .• Table 5-4 Maintenance Sub Menu Page 13 of 33 Model 4501-XX Toxic Gas Sensor Module 6. CALIBRATION 6.1 CALIBRATION FREQUENCY The sensor module must be calibrated every 180 days at a minimum. Periodic functional tests are advisable for critical applications and hostile environments. The sensor module microprocessor software includes high-level self checking algorithms which provide continuous sensor diagnostic and self adjustment. 6.2 CALIBRATION PREPARATION Calibration of the sensor is accomplished by simple menu based steps and application of span gas. NOTE If an error is made during any stage of the calibration process, hold the magnet stick at the [M] for 10 seconds. A scrolling display will indicate “calibration aborted” and the sensor module will exit the calibration activity and return to normal operating mode. The calibration procedure can then be restarted. Calibration must be performed only when the area is known to be clear of the gas of interest. When in doubt, use a portable instrument to confirm that there is no background. For compliance with Factory Mutual (FM) Approvals, the Sierra Monitor Model 1250-01, 1260 -05 and 1260-45 are the FM Approved calibration gas delivery devices. Use the Model 5358-01 Calibration Adapter delivery fitting. NOTE: Refer to Appendix D for information on use of permeation tube for 4501-25 calibration. 6.3 CALIBRATION GAS DELIVERY METHODS Calibration gas can be delivered to the sensors via the Model 5358-01: Calibration Adapter (Figure 6-1) - used with portable calibrators. CALIBRATION PROCEDURE The Calibration Menu is described on Table 6-1: The procedure requires that the menu “keys” be activated using the magnet stick. Each key press steps through the process of setting the zero value for clean air and then setting the span value. At each of these steps, apply calibration gas of the value corresponding to the setting accepted on the sensor module display. 6.4 SENSOR EXPOSURE TO GAS Calibration gas must be delivered to the sensor using the flow rate and duration listed in below: Model Calibration Gas Flow Period 4501-03 Air 300 cc of Zero Air or exposure to Ambient Air (3 minutes) 4501-04 Carbon Monoxide 300 cc/min Until Stable (minimum 3 minutes) 4501-05 Hydrogen Sulfide 300 cc/min Until Stable (minimum 3 minutes) 4501-06 Chlorine 300 cc/min Until Stable (minimum 3 minutes) 4501-08* Chlorine 300 cc/min Until Stable (minimum 3 minutes) 4501-10 Sulfur Dioxide 300 cc/min Until Stable (minimum 3 minutes) 4501-12 Nitrogen Dioxide 300 cc/min Until Stable (minimum 3 minutes) 4501-25 Ammonia See Appendix D 4501-26** Chlorine 500 cc/min Until Stable (minimum 6 minutes) * Note: Use 10 PPM Cl2 to calibrate, equivalent reading = 3.0 PPM ClO2 ** Note: Use 5 PPM Cl2 to calibrate equivalent reading = 8.0 PPM HF Figure 6-1 Model 5358-01 Calibration Adapter Page 14 of 33 Model 4501-XX Toxic Gas Sensor Module 6.5 CALIBRATION SUB-MENU Key Function Display Description Reference XXXPPM Default Display ME Mode H2S CALIB:-Mode Function - Calibrate .• ME Enter H2S Cal Zero Banner: Apply zero gas, enter when done .• Operation: Confirm area clear of gas, or apply zero air to sensor. ME Enter H2S ACK Zero gas setting acknowledged .• H2S 10PPM-SP Banner:...

Herunterladen

Geben Sie zwei Ziffern: