Ise Amp Board; Ise Amp Board Signal Address; Confirmation Of Ise Amp Voltage - Hitachi 902 Service Manual

10.11 ISE AMP Board

(1) Explanation of Circuit Board
This amplifier is intended to amplify the ion selective electrode (ISE) signal. The input
signal includes Na, K, Cl, Ref.
(2) External View
(75)
(3)

ISE AMP Board Signal Address

Signal Name
Multiplexer address
SW1 address
< Confirmation of ISE AMP Voltage >
Confirm the voltage between TP1 and TP2.
(a) Select ERef (SW no. 4) with the multiplexer and confirm that the output is 4.69 <
ERef < 5.05.
Select E2 (SW no. 3) with the multiplexer and confirm that the output is 2.00 ±
(b)
0.005 V. [adjustment of VR1]
Select E8 (SW no. 2) with the multiplexer and confirm that the output is 8.00 ±
(c)
0.005 V. [adjustment of VR2]
(130)
ENa EK
7 6
7 6
10 - 52
ECI ERef
5 4
5 4
E2 E8
3 2
3 2