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CAMM
Air Monitor Corporation
116-044-91.P65 (8/31/10)
CAMM - IO&M Manual
SECTION 6 – CALIBRATION
55
6.4 – TRANSMITTER OUTPUT CALIBRATION
1. Scroll Main Menu to:
Transmitter Output
Calibration
2. Press
ENT
, and display will indicate:
Output 1 Zero
3. Press
ENT
, and display will indicate:
Output 1 Zero
Perform Calibration
4. Connect a DMM set for type and scale of Transmitter Output 1 (see Factory Set-Up Information Sheet) across
terminals 1 and 3 on CAMM (see Figure 4.3).
Note: If the output is 4-20mA, a load resistance should be in series with the DMM. This can be accomplished by
connecting the actual process load or a resistor of similar value to the actual process load.
DMM should be reading minimum value; 0.00 ± 0.01 volts or 4.00 ± 0.01mA.
5. If DMM is reading out of tolerance, use
UP
or
DN
to adjust CAMM output for an acceptable DMM reading.
Depending on DMM's selected range, the
UP
or
DN
button may need to be pressed and held for a period of
time before any change occurs in the DMM's display. To speed up changes in output, pushbutton combinations
can be used. The following chart lists these combinations along with the associated change in output type.
OUTPUT TYPE
PUSHBUTTON COMBINATION
4-20mA
0-5VDC
0-10VDC
UP
only
+0.001mA
+0.3mV
+0.6mV
DN
only
-0.001mA
-0.3mV
-0.6mV
UP*
+
ESC
+0.01mA
+0.003V
+0.006V
DN*
+
ESC
-0.01mA
-0.003V
-0.006V
UP*
+
DN
+0.1mA
+0.03V
+0.06V
DN*
+
UP
-0.1mA
-0.03V
-0.06V
UP*
+
ESC*
and
DN
+1.0mA
+0.3V
+0.6V
DN*
+
ESC*
and
UP
-1.0mA
-0.3V
-0.6V
*Must be pressed and held before other button(s) are pressed.
Содержание CAMM
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