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３．Specifications
Operation system：Periodic sampling operation
Scaling：1×10
-9
- 9999
Accuracy：±０.０５％ F.S. ±１digit ( at Sampling time for 0.5 second or more , per one input ）
Display：Character height 8.0 mm, 4 digit, range -999 to 9999（Overflow indication：
9999 or -999 flashing）
Upper row･･･Red LED, Lower row･･･Green LED
Decimal digits：Displays 1-3 decimal digits（selectable）
Time unit：Per hour, per minute, or per second（selectable）
Reading sampling time：Reading averaged by 0.1-99.9 seconds.
Least significant digit：Real, fixed at 0, or 0/5
Moving average：（A input）Averaged by 1-19 input pulses
（B input）Averaged by 1-9 input pulses
Auto zero time：The time（0.5-120 seconds selectable）, following input stop,
at which the reading returns to zero.
Setting the upper row indicator：In case the lower row indicates sum, difference, or ratio value,
the upper row indicates instant value of A input or B input.
Sensor input：
・Input signal（Setting by the dip switch）
Standard：NPN open collector pulse input（10 mA min.）or ground contact
Option F type：Voltage pulse input：2.0 V or lower for LOW, 3.8-30 V for HI
Input impedance：Approx. 47 kΩ
・Input response frequency at 50% duty（Setting by the dip switch）
LOW：0.01Hz - 50Hz It does not accept noise element of higher frequency.
HI：0.01Hz - 10kHz It responds to higher frequency.
・Power supply for sensor
DC＋12V（±１０％） 50 mA max. output（stabilized）
（In DC power source less than 13V, power supply for sensor is not stabilized.）
Alarm output：
・Mechanism：Judged against upper and lower limits（selectable）.
Output width setting is also selectable.
・The alarm preset values range：-999 to 9999
・Output circuit：Four-row NPN open collector pulse output,
Maximum rating：DC30V 50mA
・Output indication：During alarm output, the OUT1, OUT2, OUT3, and OUT4 LEDs
are activated.
・Output reset：Alarm reset using Reset key or input from terminal board.
・Alarm disable time interval：The alarm output function is disabled for the specified
time interval following power on or reset.
Summary of Contents for SP-490 Series
Page 29: ...26 M R M M M R M R M M Power supply off M R M Test mode Fig 13...
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