Introduction and Specifications
Specifications
1
1-19
Table 1-3. 2620A/2625A Specifications (cont)
AC Signal Crosstalk into an Ohms Channel
AC Frequency = 50, 60 Hz,
±
0.1%
OHMS Error Ratio =
Ohmss error
VAC rms crosstalk
(
)
(
)
Range
Ratio (worst case)
Ratio (typical)
300.00
Ω
3.3 x 10
-5
Ohms
VAC rms
No Effect
3.000 k
Ω
2.4 x 10
-6
kOhms
VAC rms
6.7 x 10
-7
kOhms
VAC rms
30.000 k
Ω
3.1 x 10
-4
kOhms
VAC rms
8.4 x 10
-5
kOhms
VAC rms
300.00 k
Ω
5.6 x 10
-3
kOhms
VAC rms
3.7 x 10
-3
kOhms
VAC rms
3.0000 M
Ω
3.8 x 10
-4
MOhms
VAC rms
3.8 x 10
-5
MOhms
VAC rms
10.000 M
Ω
1.4 x 10
-3
MOhms
VAC rms
4.3 x 10
-4
MOhms
VAC rms
For example, to find the typical effect of a 60 Hz, 100V ac signal on another channel for the 30 k
Ω
range, you would calculate: 100 X 8.4 X 10
-5
= 0.008 k
Ω
.
AC Signal Crosstalk into a Temperature Channel
Frequency = 50, 60 Hz
Temperature Error Ratio =
°
C error
VAC rms crosstalk
(
)
(
)
Type
Worst case
Typical
Types J, K, E, T, N:
2.7 x 10
-3
°
C
VAC rms
5.0 x 10
-4
°
C
VAC rms
Types R, S, B, C:
1.1 x 10
-2
°
C
VAC rms
2.0 x 10
-3
°
C
VAC rms
Type PT (RTD):
8.6 x 10
-5
°
C
VAC rms
No Effect
AC Signal Crosstalk into a Frequency Channel
Frequency measurements are unaffected by crosstalk as long as the voltage-frequency product is kept
below the following limits:
Worst Case
Typical
V x Hz Product Limit
3.7 x 10
4
(V x Hz)
1.0 x 10
6
(V x Hz)
1
These valkues assu;me no more than 1000 pF of capacitance between either end of the resistor (HI and LOW) and earth groung.
Summary of Contents for 2620A
Page 4: ......
Page 18: ...HYDRA Service Manual 1 2...
Page 48: ...HYDRA Service Manual 1 32...
Page 140: ...HYDRA Service Manual 3 16...
Page 234: ...HYDRA Service Manual 5A 34...
Page 236: ...HYDRA Service Manual 6 2...
Page 254: ...HYDRA Service Manual 6 20 2620A 1601 s63f eps Figure 6 3 2620A 2625A A1 Main PCA...
Page 258: ...HYDRA Service Manual 6 24 2635A 1601 s64f eps Figure 6 4 2635A A1 Main PCA...
Page 260: ...HYDRA Service Manual 6 26 2620A 4002 CKT 1 CKT 2 s65f eps Figure 6 5 A2 Display PCA...
Page 272: ...HYDRA Service Manual 6 38...
Page 274: ...HYDRA Service Manual 7 2...
Page 282: ...HYDRA Service Manual 7 10...
Page 284: ...HYDRA Service Manual 8 2...
Page 285: ...Schematic Diagrams 8 8 3 Figure 8 1 A1 Main PCA 2620A 2625A 2620A 1601 s88f eps...
Page 288: ...Schematic Diagrams 8 8 6 Figure 8 1 A1 Main PCA 2620A 2625A cont 2620A 1001 3 of 4 s73f eps...
Page 292: ...Schematic Diagrams 8 8 10 2635A 1001 2 of 5 Figure 8 2 A1 Main PCA 2635A cont s76f eps...
Page 293: ...Schematic Diagrams 8 8 11 2635A 1001 3 of 5 Figure 8 2 A1 Main PCA 2635A cont s77f eps...
Page 296: ...Schematic Diagrams 8 8 14 2620A 4002 CKT 1 CKT 2 Figure 8 3 A2 Display PCA s90f eps...
Page 300: ...Schematic Diagrams 8 8 18 2620A 1003 2 of 3 Figure 8 4 A3 A D Converter PCA cont s82c eps...
Page 301: ...Schematic Diagrams 8 8 19 2620A 1003 3 of 3 Figure 8 4 A3 A D Converter PCA cont s83c eps...
Page 302: ...Schematic Diagrams 8 8 20 2620A 1604 Figure 8 5 A4 Analog Input PCA s92f eps...
Page 304: ...Schematic Diagrams 8 8 22 2620A 1605 Figure 8 6 A5 IEEE 488 Interface PCA 2620A Only s93f eps...
Page 306: ...Schematic Diagrams 8 8 24 2625A 1606 Figure 8 7 A6 Memory PCA 2625A s94f eps...
Page 310: ...Schematic Diagrams 8 8 28...
