User Guide for UNISENSE models including: 2024.01, N2O Nitrous Oxide Sensor, N2O, Nitrous Oxide Sensor, Oxide Sensor, Sensor
Manuals - Unisense
Test - Unisense
Page 1 of 2 GETTING STARTED GUIDE AND UNISENSE STANDARD SPECIFICATIONS FOR NITROUS OXIDE SENSORS Important! Test sensor upon receipt! This sensor has been successfully tested prior to shipping. However, some sensors suffer from rough transportation. Therefore, it is important that you test the sensor upon arrival. REPLACEMENT OF DEFECTIVE SENSORS Unisense will replace the sensor if it does not meet the specifications below, provided that: 1. A test is performed upon receipt without breaking the seal (Note! No seal on MR-sensors for testing purposes) 2. The complaint is given to Unisense within two weeks from receipt of the equipment. GUARANTEED LIFETIME Unisense guarantees the nitrous oxide sensor a minimum lifetime of 2 months on condition of correct storage and use according to the manual. INDIVIDUAL SENSOR CALIBRATION IS REQUIRED Our sensors are handmade and as the sensor signal relies on the exact geometry of the sensor tip (micrometer scale), some variation between sensors must be expected. SIGNAL AMPLIFICATION Unisense nitrous oxide sensors should be connected to a Unisense amplifier such as a UniAmp series instrument or the Field Microsensor Multimeter STANDARD NITROUS OXIDE SENSORS ARE FUNCTIONING CORRECTLY IF (AT ROOM TEMPERATURE): · The 90% response time is <30 sec. for N2O-50 and N2O-100, <35 sec. N2O-500, and <65 sec. for all other N2O sensor versions · The zero signal is less than 20 mV* * The sensor signal in pA is converted by the instrument to a signal in mV. The 20 mV limit is for the default setting of the Pre-Amp range of 1 pA = 1 mV. This can be changed by the user (see the instrument manual). Patent information This product is covered by the following patents: Patent issued in China: CN 104937405 A Patent issued in USA: 9921178 Patent issued in Japan: JP6275744B2 Patent pending in several other jurisdictions. Unisense A/S sales@unisense.com Phone: +45 89 44 95 00 Page 2 of 2 GETTING STARTED WITH NITROUS OXIDE SENSORS 1. UNPACKING · Remove the grey shock-absorbing plastic net and inspect the sensor visually. Leave the sensor in the protection tube for testing. 2. CONNECT THE SENSOR TO THE AMPLIFIER · Set the polarization voltage to -1.3 V for pre-activation of the sensor. · For UniAmp series instruments, adjust the polarization in the calibration window in the Unisense SensorTrace software. · For Multimeter, Monometer, and Field Multimeter adjust the polarization on the instrument. · For other amplifiers, set the polarization manually to -1.3 V. NOTE! Incorrect polarization may destroy the sensor 3. WAIT FOR THE SENSOR TO STABILIZE · Leave the polarization at -1.3 V for 30 min, then change it to -0.8 V. · The signal will first fluctuate and then decrease over time for at least 2 hours. If possible, leave the sensor to stabilize overnight. · Once the signal is stable, calibration can be performed. 4. CALIBRATE THE SENSOR NOTE! Exposure to concentration above its measuring range may destroy the sensor! · Use air saturated water as one calibration point. This is easily done using the CAL300 calibration chamber. The sensor may be dipped directly into the calibration chamber or the air saturated water may be injected into the protection tube using the calibration cap. A typical decrease in sensor signal over time for a sensor that has just been plugged in. · Use the Unisense N2O solution as the second calibration point. Inject the N2O solution into the calibration cap (incl. in calibration kit) and wait for the sensor to respond. · For alternative calibration method, see the N2O Microsensor manual. 5. APPROVE THE SENSOR · Compare the sensor signals to the specifications given on the previous page. If necessary, see Troubleshooting in the N2O Microsensor manual or contact support (see below). CAL300 with microsensors and bubbling with air. Injecting calibration liquid into protection tube using the calibration cap. 6. STORAGE · When not in use, store the sensor with the protection tube mounted at room temperature or in a fridge (approx. 4°C) for longer lifetime. If the sensor is used regularly, keep it polarized and connected to the amplifier. USEFUL TOOLS For support go to www.unisense.com/support or contact sales@unisense.com Get the full manuals for all sensors, equipment & software at www.unisense.com/manuals N2O Microsensor Manual Calkit-N2O Manual SensorTrace Suite Manual Find SDS for Calibration Kit here Version: January 2024GPL Ghostscript 10.01.1 Adobe InDesign 19.1 (Macintosh)