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Model 7708 M ultiplexer M odule Instructions for use w ith DAQ6510 077144500 / April 2018 17 Range Applied DC voltage Reading limits (1 y ear, 18 °C to 28 °C) 100 mV 100.0000 mV 99.9935 to 100.0065 mV 1 V 1.000000 V 0.99…

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Model 7708 Multiplexer Module Instructions for use with DAQ6510
16 077144500 / April 2018
Verifying DC voltage
To check DC voltage accuracy, apply accurate voltages from the DC voltage calibrator to the input terminals of
the module and verify that the displayed readings fall within specified limits.
Do not exceed 300 VDC between plug-in module INPUT H and L terminals or between any
adjacent channels. Failure to observe this precaution can cause instrument damage.
To verify DC voltage accuracy:
1. Connect the CH1 H and L INPUT terminals to the DC voltage calibrator as shown in the next figure.
Use shielded, low-thermal connections when testing the 100 mV and 1 V ranges to avoid errors
caused by noise or thermal effects. Connect the shield to the output LO terminal of the calibrator.
2. Install the module in Slot 1 of the DAQ6510.
3. Turn on the power.
4. Allow the instrument to warm up for one hour.
5. Make sure that the front-panel TERMINALS switch is set to REAR.
6. On the front panel of the instrument, select the FUNCTION key and then select DC Voltage.
7. On the Home screen, swipe to the CHANNEL swipe screen.
8. Close channel 101.
9. Set the range to 100 mV.
10. Set the calibrator output to 0.00000 mV DC.
11. Allow the reading to settle.
12. Swipe to the Settings screen.
13. Enable Rel.
14. For the calibrator, source positive, negative, and full-scale voltages, see the ranges listed in the table
below. For each voltage setting, make sure that the reading is within stated limits.
15. Return to the CHANNEL swipe screen and open Channel 1.
Model 7708 Multiplexer Module Instructions for use with DAQ6510
077144500 / April 2018 17
Range
Applied DC voltage
Reading limits (1 year, 18 °C to 28 °C)
100 mV
100.0000 mV
99.9935 to 100.0065 mV
1 V
1.000000 V
0.999969 to 1.000031 V
10 V
10.00000 V
9.99970 to 10.00030 V
100 V
100.0000 V
99.9955 to 100.0045 V
1000 V
300.000 V
299.983 V to 300.017 V
Verifying AC voltage
To check AC voltage accuracy, apply accurate AC voltages at specific frequencies from the AC voltage
calibrator to the module inputs. Verify that the displayed readings fall within specified ranges.
Do not exceed 300 V
RMS
between the INPUT H and L terminals or between adjacent channels,
or 8
10
7
V•Hz input. Failure to observe this precaution may result in instrument damage.
To verify AC voltage accuracy:
1. Connect the CH1 H and L INPUT terminals of the module to the AC voltage calibrator, as shown in the next
figure.
Model 7708 Multiplexer Module Instructions for use with DAQ6510
18 077144500 / April 2018
2. Install the module in Slot 1 of the DAQ6510.
3. Turn on the power.
4. Allow the instrument to warm up for one hour.
5. Make sure that the front-panel TERMINALS switch is set to REAR.
6. On the front panel of the instrument, select the FUNCTION key and then select AC Voltage.
7. On the Home screen, swipe to the CHANNEL swipe screen.
8. Close channel 101.
9. Set the range to 100 mV.
10. Swipe to the Settings screen.
11. Disable Rel.
12. Source 1 kHz and 50 kHz AC voltages for each of the ranges summarized in the table below. Make sure
that the respective DAQ6510 readings are within stated limits.
13. Return to the CHANNEL swipe screen and open Channel 1.
ACV range
Applied AC voltage
1 kHz reading limits
(1 year, 18 °C to 28 °C)
50 kHz reading limits
(1 year, 18 °C to 28 °C)
100 mV
100.0000 mV
99.910 to 100.090 mV
99.830 to 100.170 mV
1 V
1.000000 V
0.99910 to 1.00090 V
0.99830 to 1.00170 V
10 V
10.00000 V
9.9910 to 10.0090 V
9.98300 to 10.0170 V
100 V
100.0000 V
99.910 to 100.090 V
99.830 to 100.170 V
750 V
300.000 V*
299.60 to 300.40 V
299.27 to 300.73 V
* If the 5725A amplifier is not available, change the 300 V @ 50 kHz step to 220 V @ 50 kHz. Reading limits
for 220 V @ 50 kHz = 219.36 V to 220.64 V.