Rosemount 2081 pH - Bench Check with Preamp; Bench Check Without Preamp

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FIGURE 8-1
Bench Check (With Preamplifier)
FIGURE 8-2
Bench Check (Without Preamplifier)
12 11 10 9 8 7 6 5 4 3 2 1
4 3 2 1
TB2
Pin connection on
10 to check thru
the Preamp
mA
Power
Supply
RTD Decade
Box or Resistor
– Loop
+ Loop
TEST
+
COMM
+
Millivolt Source
+
+
Jmpr
12 11 10 9 8 7 6 5 4 3 2 1
4 3 2 1
TB2
Pin connection
on 11 to bypass
the Preamp
Pin connection
on 2 to check without
Preamp
mA
Power
Supply
RTD Decade
Box or Resistor
– Loop
+ Loop
TEST
+
COMM
+
Voltage Source
+
+
Jmpr
■■
■■
* JP1 installed.
NOTE: Using millivolts for this test will result
in a “SnSr-FAIL” fault code. See Table 8-4 for
valid voltage inputs.
■■
■■
* JP1 is removed.
MODEL 2081 pH SECTION 8.0
DIAGNOSTICS AND TROUBLESHOOTING