USER MANUAL
400GD
12 / 20
MRU GmbH, D-74172 Neckarsulm
During the warm up phase, the sensor LED flashes and no measurement is pos-
sible.
Measurement mode is active once warm is completed.
A measurement value is displayed (gas concentration) and the meas-
urement has started.
Exit the measurement screen by pressing OK.
Use the arrow keys to select the alarm menu
Adjust the alarm threshold values with the arrow keys (e.g. 100 ppm)
Confirm the value with the OK key.
Reset to zero if needed in the zeroing menu.
Use the arrow keys to select the start menu.
Press the OK key.
Slowly move the sensor along the pipes that are being tested.
The measured value will change when a leakage is detected, a graph
will be recorded, optical and acoustic signals indicate a gas leakage.
Measurement with different sensors are based on the same principle. The
moisture sensor RM400, the Infrared temperature sensor IR400 and the hy-
grometer HM400 have no warm up phase.
