| 1577 accuracy |
| Range |
Resolution |
50 Hz to 60 Hz ± (% of Rdg + Counts) |
| 600.0 mV |
0.1 mV |
± (2 % + 3) |
| 6.000 V |
0.001 V |
± (2 % + 3) |
| 60.00 V |
0.01 V |
± (2 % + 3) |
| 600.0 V |
0.1 V |
± (2 % + 3) |
| 1000 V |
1 V |
± (2 % + 3) |
| AC Conversion |
Inputs are ac coupled true-rms responding and specified from 5 % to 100 % of range. Input signal crest factor can be up to 3 up to 500 V, decreasing linearly to a crest factor =1.5 at 1000 V. For non-sinusoidal waveforms add ± (2 % reading + 2 % FS) typical, for a crest factor up to 3. |
| Input Impedance |
10 MΩ (nominal), <100 pF, ac-coupled |
| Common mode rejection ratio (1 kΩ unbalanced) |
>60 dB at dc, 50 or 60 Hz |
| DC voltage measurement |
| Range |
Resolution |
Accuracy 1587 FC1
± (% of Rdg + Counts) |
Accuracy 15771
± (% of Rdg + Counts) |
| 6.000 V dc |
0.001 V |
± (0.09 % + 2) |
± (0.2 % + 2) |
| 60.00 V dc |
0.01 V |
± (0.09 % + 2) |
± (0.2 % + 2) |
| 600.0 V dc |
0.1 V |
± (0.09 % + 2) |
± (0.2 % + 2) |
| 1000 V dc |
1 V |
± (0.09 % + 2) |
± (0.2 % + 2) |
| 1 Accuracies apply to ± 100% of range. |
| Input Impedance: 10 MΩ (nominal), <100 pF |
| Normal mode rejection ratio: >60 dB @ 50 Hz or 60 Hz |
| Common mode rejection ratio: >120 dB @ dc, 50 Hz or 60 Hz (1 k unbalanced) |
| DC millivolts measurement |
| Range |
Resolution |
Accuracy 1587 FC ± (% of Rdg + Counts) |
Accuracy 1577 ± (% of Rdg + Counts) |
| 600.0 mV dc |
0.1 mV |
± (0.1 % + 1) |
± (0.2 % + 1) |
| DC and AC current measurement |
| Range |
Resolution |
Accuracy 1587 FC ± (% of Rdg+Counts) |
Accuracy 1577 ± (% of Rdg+Counts) |
Burden voltage (Typical) |
| AC 45 Hz to 1000 Hz |
400 mA |
0.1 mA |
± (1.5 % + 2) 1 |
± (2 % + 2) 1 |
2 mV/mA |
| 60 mA |
0.01 mA |
± (1.5 % + 2) 1 |
± (2 % + 2) 1 |
|
| DC |
400 mA |
0.1 mA |
± (0.2 % + 2) |
± (1.0 % + 2) |
2 mV/mA |
| 60 mA |
0.01 mA |
± (0.2 % + 2) |
± (1.0 % + 2) |
|
| 1 1 kHz bandwidth |
| Overload: 600 mA for 2 minutes maximum |
| Fuse protection for mA Input: 0.44 mA, 1000 V, IR 10 kA |
| AC conversion: Inputs are ac coupled true-rms responding and specified from 5 % to 100 % of range. Input signal crest factor can be up to 3 up to 300 mA, decreasing linearly to crest factor =1.5 at 600 mA. For non-sinusoidal waveforms add +(2 % reading + 2 % FS) typical, for a crest factor up to 3. |
| Ohms measurement |
| Range |
Resolution |
Accuracy 1587 FC1
+ (% of Rdg+Counts) |
Accuracy 15771
+ (% of Rdg+Counts) |
| 600.0 Ω |
0.1 Ω |
± (0.9 % + 2) |
± (1.2 % + 2) |
| 6.000 kΩ |
0.001 kΩ |
| 60.00 kΩ |
0.01 kΩ |
| 600.0 kΩ |
0.1 KΩ |
| 6.000 MΩ |
0.001 MΩ |
| 50.0 MΩ [2] |
0.01 MΩ |
± (1.5 % + 3) |
± (2.0 % + 3) |
| 1 Accuracies apply from 0 % to 100 % of range. 2 Up to 80 % relative humidity. |
| Overload protection: 1000 V rms or dc |
| Open circuit test voltage: <8.0 V dc |
| Short circuit current: <1.1 mA |
| Diode test (1587 FC only) |
| Diode test indication |
Display voltage drop: 0.6 V at 1.0 mA nominal test current |
| Accuracy |
± (2 % + 3) |
| Continuity test |
| Continuity indication |
Continuous audible tone for test resistance below 25 O and off above 100 O. Maximum reading; 1000 O |
| Open circuit voltage |
<8.0 V |
| Short circuit current |
1.0 mA typical |
| Overload protection |
1000 V rms |
| Response time |
>1 m sec |
| Frequency measurement (1587 FC only) |
| Range |
Resolution |
Accuracy ± (% of Rdg+Counts) |
| 99.99 Hz |
0.01 Hz |
± (0.1 % + 1) |
| 999.9 Hz |
0.1 Hz |
± (0.1 % + 1) |
| 9.999 kHz |
0.001 kHz |
± (0.1 % + 1) |
| 99.99kHz |
0.01 kHz |
± (0.1 % + 1) |
| Frequency counter sensitivity |
| Input range |
V ac Sensitivity (RMS Sine Wave)1 |
DC trigger levels to 20 kHz2 |
| 5 Hz to 20 kHz |
20 kHz to 100 kHz |
|
| 600.0 mV ac |
100.0 mV |
150.0 mV |
NA |
| 6.0 V |
1.0 V |
1.5 V |
-400.0 mV and 2.5 V |
| 60.0 V |
10.0 V |
36.0 V |
1.2 V and 4.0 V |
| 600.0 V |
100.0 V |
|
12.0 V and 40.0 V |
| 1000.0 V |
300.0 V |
|
12.0 V and 40.0 V |
| 1 Maximum input for specified accuracy = 10x range (1000 V max). Noise at low frequencies and amplitudes may affect accuracy. |
| 2 Usable to 100 kHz with full scale input. |
| Capacitance (1587 FC only) |
| Range |
Resolution |
Accuracy ± (% of Rdg+Counts) |
| 1000 nF |
1 nF |
± (1.2 % + 2) |
| 10.00 µF |
0.01 µF |
| 100.0 µF |
0.1 µF |
± (1.2 % + 90 counts) |
| 9999 µF |
1 µF |
| Temperature measurement (1587 FC only) |
| Range |
Resolution |
Accuracy 1 ± (% of Rdg+Counts) |
| -40 ° C to 537 ° C |
0.1 °C |
± (1 % + 10 counts) |
| -40 ° F to 998 ° F |
0.1 °F |
± (1 % + 18 counts) |
| 1 Accuracies apply following 90 minutes settling time after a change in the ambient temperature of the instrument. |
| Measurement range |
Model 1587 FC: 0.01 MΩ to 2 GΩ
Model 1577: 0.1 MΩ to 600 MΩ |
| Test voltages |
Model 1587 FC: 50, 100, 250, 500, 1000 V
Model 1577: 500, 1000 V |
| Test voltage accuracy |
+20 %, -0 % |
| Short-Circuit test current |
1 mA nominal |
| Auto discharge |
Discharge time <0.5 second for C = 1 µF or less |
| Live circuit detection |
Inhibit test if terminal voltage > 30 V prior to initialization of test |
| Maximum capacitive load |
Operable with up to 1 µF load |