Instruction Manual

Instruction Manual
748213-S
April 2002
6-8 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management
Model 755R
c. U4 Zero
1. Monitor TP5, adjust R100 for 1 VDC
±2mV.
2. Monitor TP10, adjust R13 (ZERO) for
0.0 VDC ±5mV.
d. U8 Zero
Monitor TP11, adjust R29 for 0.0 VDC
±5mV.
e. U10 Zero
1. Monitor TP16, adjust R29 for 0.0 VDC
±5mV.
NOTE:
This adjustment requires a "long time"
constant. Allow adequate time.
2. Adjust R29 to obtain a reading of
00.00 ±5 counts on the display.
f. Fullscale
1. Monitor TP11. Flow 100% oxygen,
adjust SPAN potentiometer R20 for
10.00 V ±5mV.
2. Monitor TP16, adjust R20 for 10.00 V
±5mV. The display must read 100.00
±5 counts.
g. Recorder Fullscale
1. Flow nitrogen at 250 cc/min, monitor
TP16, and adjust front panel ZERO
potentiometer for .000 VDC.
2. Flow 100% oxygen for span gas. Re-
corder output for 1 V, 100 mV, or 10
mV should read 100% of span gas.
Adjust R88 if necessary.