Specifications |
| ANALOG SECTION |
| Excitation voltage | DC3V±10％ Output current: within 35mA |
| Signal input range | -3.0 - +3.0mV/V |
| Equiv. input calibration range | +0.5 - +3.0mV/V |
| Zero adjustment range | -2.0 - +2.0mV/V |
| Gain adjustment range | +0.5 - +3.0mV/V |
| Accuracy | Non-linearity: within 0.02%/FS (at 3.0mV/V input)
Zero drift: within 0.3μV/℃ RTI
Gain drift: within 5ppm/℃ |
| A/D converter | Speed: 80 times/sec.
Resolution: 24bit（binary）Approx. 1/30000 at 3.0mV/V input |
| DISPLAY SECTION |
| Display unit | 128×64 dot black and white LCD |
| Measured value | 5digits: -99999 to +99999 Sign: Character height: 14mm |
| Status display | Status display1……R(Recording) / A(AC adapter on use) / U(USB in connection) / N(NOV RAM reading) / B(Backup battery abnormal)
Status display2……HI/OK/LO/PEAK/BOTTOM/HOLD |
SETTING SECTION |
| Setting items | ・Tare*/ equivalent input calibration/ span calibration/ zero calibration(one-touch zero)/ weight unit setting*/ channel setting/ HI setting/ LO setting/ machine ID setting*/ setting value lock
・Unit/ digital filter/ MD(period, range)/ZT(period, range)/ near zero/ digital zero/ minimum scale
・Data/ buzzer/ backlight/ auto off/ version display/ memory check/ initialization
・Hold: mode/ range/ start level/ end level/ monitoring time
・Graph: time axis*/ mode*/ trigger edge*/ trigger level*/ pre-trigger*
・Operation mode/ HI/LO comparison mode/ measuring mode*/ recording mode*/ real-time output* * not usable at Simple Operation Mode |
RECORDER |
| Recording function | ・Record when [REC] is pressed
・Record when stability is detected
・Record hold value at hold-release time
・Interval recording(records data at every fixed interval)
・Records graph data(records data displayed in graph) |
| Recording media | Internal memory |
| Recording method | Text form of CSV format |
| Recording data | ID, number of recordings, recording data, measured channels, measured values, unit |
| Number of recording data | 20,000 data |
HOLD SECTION |
| Hold Mode: Peak Hold/ Valley Hold/ Peak-to-Peak Hold/ Sample Hold
Data monitoring range: All ranges/ level/ level + time |
MEASURING MODE |
| Load measuring/ counting |
INTERFACE |
| USB interface（Communication standard: Compliant with USB Ver.1.1 Communication speed: Full speed Class: Mass-storage and virtual COM port OS: Windows XP (SP3),Windows Vista (SP1)）
・File operation The F490A is recognized as a drive, which enables file reference and copying.
・Virtual COM port Set values can be read and written by terminal software.
・Real-time output Measured data are output in succession on USB. |
GENERAL SPECIFICATIONS |
| Internal power source | AA alkaline batteries or nickel metal hydride batteries (4) |
| External power source | Dedicated AC adapter (for 100V AC) |
| Current consumption | When a 120Ω sensor is connected: Approx. 60mA (back light off)
When a 120Ω sensor is connected: Approx. 70mA (back light on) |
| Backup power source | Set values and record data are maintained by the lithium battery (warranty period 5 years or more) |
| Continuous use time | When a 350Ω sensor is connected: Approx. 30 hours (back light off)
When a 120Ω sensor is connected: Approx. 12 hours (back light off) |
| Operating conditions | Temperature: -10℃ to +40℃
Humidity: 80％RH or lower（non-condensing） |
| External dimensions | 86（W）×132（H）×30（D）mm（not including projections） |
| Weight | Approx. 290g (including the battery weight approximately 95g) |
ACCESORIES |
| Sensor connector | 1 |
| AA alkaline battery | 4 |
| CD-ROM | 1 |
| Operation manual | 1 |
