CM4 Four-Point Continuous Monitor
CM4 Technical Manual
5-5
5.4.1 Selecting the Signal Levels Manually
Purpose
The Calibrate Current Loop function allows selection of the signal level
for each individual point.
Instructions
1. Press PROGRAM to exit Monitor Mode.
2. From the 1–CALIBRATION MODE, choose CALIBRATION
MENU, then the subfunction 3–CALCULATE CURRENT
LOOP.
1 – CALIBRATION MODE
CALIBRATION MENU <>
3 – CAL CURRENT LOOP
The display reads:
SELECT POINT
3. Use the numeric keys to specify a point. The screen
displays:
PT 1 CAL 1=MAN 2=RAMP 3=STEP
4. Press 1. The selected output point drops automatically to 2 mA
or remains at 4 mA, depending on whether 2 mA fault operation
is set (see
). The display reads:
PT 1 2 mA PRESS
20 mA
5. Press CURSOR ARROW RIGHT to toggle the output between
2 mA to 20 mA. The display reads:
PT 1 20 mA PRESS
2 mA
Press RESET to return to the Calibration Mode without toggling the
test levels.
5.4.2 Selecting Signal Levels – Automatic Ramping
1. Press PROGRAM to exit Monitor Mode.
2. From the 1–CALIBRATION MODE, choose CALIBRATION
MENU, then the subfunction 3–CALIBRATE CURRENT
LOOP.
1 – CALIBRATION MODE
CALIBRATION MENU <>
3 – CAL CURRENT LOOP
The display reads:
SELECT POINT
3. Use the numeric keys to specify a point. The displays reads:
PT 1 CAL 1=MAN 2=RAMP 3=STEP
4. Press 2. The display shows the output for the selected point,
beginning at 2 mA, then 4 mA, 8 mA, 12 mA, 16 mA, and
ending at 20 mA. Each output level is displayed 5 seconds.
The display reads:
PT 1 RAMP = 2 mA
PT 1 RAMP = 4 mA
PT 1 RAMP = 8 mA
PT 1 RAMP = 12 mA
PT 1 RAMP = 16 mA
PT 1 RAMP = 20 mA
The CM4 repeats the sequence showing level of output, from 4 mA to
20 mA (or 2 mA to 20 mA if selected). Press RESET twice to return to
the Calibration Mode.
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