Omega 871A, Руководство пользователя

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4.5.1 DC Voltage Checks For Model 871A
1. Battery: VBAT > 7 V
2. Power Supplies:
V + to
È
(Analog Ground) = +2.8 ± 0.4 V
V + to
È
(Digital Ground) = +5 ± 1 V
3. Reference Diode: CR101 to
È
(Analog Ground) = -1.23 ± 0.03 V
4. Negative Reference Divider: (Reference to
È
Analog Ground)
R119
Pin mV* Pin mV* Pin mV*
2 -210 5 -204 8 -195
3 -209 6 -199 9 -186
4 -204 7 -198 10 -173
*The setting of R104 and the tolerances of the resistors within the network
(R119) can affect these levels by ± 5%.
5. Deintegrate Comparators:
U103A PIN 3 to
È
= 150 ±25mV
U103B, PIN 6 to
È
= -150 ± 25 mV
6. Cold Junction Voltage:
(Ambient temperature 25º ±3ºC)
-COM to
È
= 1.0 ±0.6 mV
4.5.2 DC Voltage Checks For Model 872A
1. Battery: VBAT > 7 V
2. Power Supplies:
V + to
È
(Analog Ground) = +2.8 ± 0.4 V
V + to
È
(Digital Ground) = +5 + 1 V
3. Reference Diode: CR101 to
È
(Analog Ground)= -1.23 ±0.03 V
4. Negative Reference Divider: (Reference to
È
Analog Ground)
R119
Pin mV* Pin mV* Pin mV*
2 -312 5 -274 8 -267
3 -293 6 -272 9 -254
4 -277 7 -271 10 -242
*The setting of R104 and the tolerances of the resistors within the network
(R119) can affect these levels by ±5%.
5. Deintegrate Comparators:
U103, Pin 3 to
È
=190 ±30 mV
U103B, Pin 6 to
È
= -180 ±30 mV
6. Cold Junction Voltage:
(Ambient temperature 25º ±3ºC)
-COM to
È
= 1.3 mV ±0.6