Eaton MTL7700 Instruction Manual page 20

BARRIER DATA
Model Safety
No . Description
V Ω
7787+ 28 300
7787+ (ch2) 28 —
7787P+ 28 237
7787P+ (ch2) 28 —
7789+ 38 300
7789+ (ch2) 28 —
Table 10: Diode return barriers
Note: Vf is the voltage dropped by a forward biased zener diode - 0.6V typically
z
INM 7700 Rev 12
MULTIMETER TESTS
End-to-end Diode
Resistance Test
Ω +ve
mA Min Max
93 311 333 ∞
— ∞ (+) ∞
0.9V + 26
119 241 253 ∞
— ∞ (+) 0.9V + 26 ∞
93 614 651 ∞
— ∞ (+) ∞
0.9V + 26
CONSTANT-CURRENT TESTS
Diode Terminal
Test Voltage
-ve @ 10µA
Min Max Min
Vf x 2 26.6 27 .4 26.7
z
Vf x 2 26.6 27 .4 26.7
z
Vf x 3 26.4 27 .4 26.5
z
Vf x 2 26.6 27 .4 26.7
z
Vf x 2 26.6 27 .4 26.7
z
Vf x 2 26.6 27 .4 26.7
z
16
Terminal
Voltage
@ 20mA
Max
27 .6
27 .6
27 .6
27 .6
27 .6
27 .6