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Series 780S Instruction Manual Chapter 3 Operation
IM-78S-B 3-15
Calibration Certificate Values Validation Test Results
Sample
Point
Bridge
Voltage
Indicated
Flow
Output
(V or mA)
Indicated
Flow
(LCD)
Flow
Meter
Stated
Accuracy
Output
(V or mA)
Flow
Meter
Stated
Accuracy
0%
25%
50%
75%
100%
Table 3-1. Electronics Validation Results
Sensor Validation Procedure
1. Locate the Ro temperature (measured resistance at 0°C) value and
the Alpha value shown on the Calibration Certificate supplied with
the flow meter.
2. Turn off power to the flow meter. Allow a 6 minute
cool-down before continuing.
3. Remove the cover of the flow meter enclosure to access the sensor
connection points. Remove the four-position jumper from J5, J6,
J7 and J8 (see below for location).
Smart Electronic Device
NEMA 4X Enclosures
Remove jumper, measure
on RIGHT ROW of pins
J5 temperature
J6 temperature
J7 velocity
J8 velocity
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Terminal Board
Hazardous-Area Enclosures
Remove jumper,
measure on LEFT
ROW of pins
J5 temperature
J6 temperature
J7 velocity
J8 velocity
Figure 3-4. Sensor Validation Component Locations
Warning!
Do not power the flow
meter with the sensor
jumper disconnected.
This could cause over-
heating of the sensors
and/or damage to the
electronics.