| Specifications |
| Item |
WR3-M |
| No. of channels |
2 channels per module |
| Input configuration |
Independent, unbalanced input for each channel (floating ground) |
| Input resistance |
1 M Ω ± 1% constant |
| Input coupling |
AC, DC, TEMP., GND, CAL (1/2 F.S.), OFF |
| Measurement range |
[Voltage] 20, 50, 100, 200, 500 mV
1, 2, 5, 10, 20, 50, 100, 200, 500 V
Auto [Temperature] TC-K: –200 to 1300 ° C
TC-J: –200 to 1100 ° C
TC-T: –200 to 400 ° C
TC-R: 0 to 1600 ° C
TC-E: –200 to 800 ° C
TC-B: 600 to 1700 ° C |
| Input filters |
[Line] 1.5 Hz (–3 dB) at –6 dB/oct.
[Low-pass] 5, 10, 30, 50, 500Hz, 5 kHz (–3 dB) at –6 dB/oct. |
| Accuracy (23 ° C ± 3 ° C) (Temperature accuracy includes reference contact compensation accuracy) |
[Voltage] ± 0.25% of F.S.
[Temperature] < TC-K, J, E > –200 ° C to 0 ° C: ± (1% of rdg + 3.5 ° C) Other: ± (0.2% of rdg + 3.5 ° C) < TC-T> –200 ° C to 0 ° C : ± (0.8% of rdg + 3 ° C) |
| Other |
± (0.2% of rdg + 3 ° C) < TC-R > 0 ° C to 200 ° C: ± 9.5 ° C 200 ° C to 800 ° C: ± 6.5 ° C Other: ± (0.2% of rdg + 4.5 ° C) < TC-B > 600 ° C to 700 ° C: ± 9.5 ° C Other: ± (0.2% of rdg + 5.5 ° C) |
| Temperature coefficient |
Zero point: 0.01% of F.S./ ° C
Gain: 0.02% of F.S./ ° C |
| Insulation resistance |
100 M Ω (at 500 V DC) |
| Isolation voltage |
Between input terminal and casing: 1 minute at 1,000 V AC |
| Permissible signal source resistance |
Max. 1 k Ω |
| Input bias current |
2nA (typ.) |
| A/D converter |
Sampling interval: 10 µ s
A/D resolution: 16 bits (out of which 14 are internally acknowledged) |
| Common mode rejection ratio |
100 dB typ (120 dB with Line Filter on) |
| Signal/noise ratio |
–46 dB (typ) 100 µ VP-P at 20 mV range (with +/– shorted) |
| Frequency response |
DC coupling: DC to 20 kHz (+1/– 3 dB Typ.)
AC coupling: 10 Hz to 20 kHz (+1/– 4.5 dB Typ.) |
| Max permissible input voltage |
Between +/– terminals: 2 V to 500 V range : 500 V DC (DC + AC P-P )
20 mV to 1 V range: 100 V DC (DC + AC P-P )
Between input terminals and GND: 33 V AC rms |
| Input terminal type |
Banana connector (two connectors) |