Calibration Menu - Dräger REGARD 3900 Serie Instrucciones De Uso

8.2.4

Calibration menu

With the calibration menu, the control unit can be calibrated for all channels during
initial installation and, if necessary, during maintenance and repair work on the
control unit or the gas detection system. For instructions on how to calibrate the
transmitter; see the instructions for use for the remote sensor transmitter.
Feature
Name
Zero-point cali-
bration
Span calibra-
tion
Carry out zero-point calibration:
1. Select Zero-point calibration for the respective channel.
2. Select Channel calibration.
● If the success message is displayed, exit the menu to save the calibration.
● If an error message appears, observe the information relating to fault
Creating calibration gas
1. Use a calibration adapter to create calibration gas at the transmitter. Create
calibration gas with a concentration between 40 and 90 % of measuring range
and with the flow rate specified in the instructions for use for the transmitter.
2. Let the measured value on the control unit display stabilise for 2 to 3 minutes.
3. Select the calibration menu of the respective channel.
4. Select Span calibration > Gas concentration.
5. Enter the concentration of the calibration gas and select Calibrate channel.
● If the success message is displayed, exit the menu to save the calibration.
● If an error message appears, observe the information relating to fault
Control of the transmitter output signal
1. Set the signal output of the transmitter to a value between 10 mA and 20 mA.
2. Select the calibration menu of the respective channel.
3. Select Span calibration > Signal mA.
4. Enter the transmitter signal and select Calibrate channel.
● If the success message is displayed, exit the menu to save the calibration.
● If an error message appears, observe the information relating to fault
REGARD
Description
Activates the LED and display test. To start and stop the test,
press OK.
Before calibrating the channel, the transmitter must be cali-
brated to ensure that the output signal of the transmitter is 4 mA
with a zero gas value.
Calibrate the span either by creating calibration gas at the
remote sensor transmitter or by influencing the output signal of
the transmitter using the transmitter control to simulate a gas
signal.
elimination.
elimination.
elimination.
®
3900
Maintenance